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EWG's Tap Water Database

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City of Houston

 

EWG's drinking water quality report shows results of tests conducted by the water utility and provided to the Environmental Working Group by the Texas Commission on Environmental Quality , as well as information from the U.S. EPA Enforcement and Compliance History database (ECHO). For the latest quarter assessed by the EPA (July 2017 - September 2017), tap water provided by this water utility was in compliance with federal health-based drinking water standards.

This water utility has its own treatment plant or water supply, and also buys or otherwise receives some of its finished water from one or more public water utility systems to provide water for a part of its service area and customers. The list below includes the names of the supplemental water suppliers, with links to their water quality testing data.
- Pine Trails Utility

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10

contaminants detected above health guidelines

30

other detected contaminants

    Includes chemicals detected in 2015 for which annual utility averages exceeded an EWG-selected health guideline established by a federal or state public health authority; chemicals detected under the EPA's Unregulated Contaminant Monitoring Rule (UCMR 3) program in 2013 to 2015, for which annual utility averages exceeded a health guideline established by a federal or state public health authority; radiological contaminants detected between 2010 and 2015.

  • 1,2,3-Trichloropropane

    cancer

    1,2,3-Trichloropropane is a potent carcinogen that contaminates drinking water in agricultural regions where it was historically used as soil fumigant. Click here to read more about carcinogenic VOCs.

    STATE

    NATIONAL

    THIS UTILITY

    How your levels compare

    HEALTH GUIDELINE:
    0.0007 ppb
    0.000381 ppb
    0.000517 ppb
    0.00142 ppb
    The State and National averages were calculated using the averages of the contaminant measurements for each utility in 2010-2015.
    ppb = parts per billion.

    Health risks of 1,2,3-trichloropropane in excess of health guideline

    The health guideline of 0.0007 ppb for 1,2,3-trichloropropane was defined by the California Office of Environmental Health Hazard Assessment as a public health goal, the level of a drinking water contaminant that does not pose a significant health risk. This health guideline protects against cancer.

    Testing summary by quarter

    NOT TESTED

    NOT DETECTED

    DETECTED

    ABOVE HEALTH GUIDELINE

    • Utility Average 2010-2015: 0.00142 ppb
    • Health Guideline Exceeded 2010-2015: Yes
    • Legal Limit Exceeded 2010-2015: No
    Utility
    Average
    2010-2015
    Health
    Guideline
    Exceeded
    2010-2015
    Legal
    Limit
    Exceeded
    2010-2015
    2010 2011 2012 2013 2014 2015
    0.00142 ppb Yes No

  • Arsenic

    cancer

    Arsenic is a potent carcinogen and common contaminant in drinking water. Arsenic causes thousands of cases of cancer each year in the U.S. Click here to read more about arsenic.

    STATE

    NATIONAL

    THIS UTILITY

    How your levels compare

    HEALTH GUIDELINE:
    0.004 ppb
    1.30 ppb
    1.99 ppb
    1.40 ppb
    The State and National averages were calculated using the averages of the contaminant measurements for each utility in 2015.
    ppb = parts per billion.

    Health risks of arsenic in excess of health guideline

    The health guideline of 0.004 ppb for arsenic was defined by the California Office of Environmental Health Hazard Assessment as a public health goal, the level of a drinking water contaminant that does not pose a significant health risk. This health guideline protects against cancer.

    Testing summary by quarter

    NOT TESTED

    NOT DETECTED

    DETECTED

    ABOVE HEALTH GUIDELINE

    ABOVE LEGAL LIMIT

    • Utility Average 2015: 1.40 ppb
    • Health Guideline Exceeded 2015: Yes
    • Legal Limit Exceeded 2015: No
    Utility
    Average
    2015
    Health
    Guideline
    Exceeded
    2015
    Legal
    Limit
    Exceeded
    2015
    2010 2011 2012 2013 2014 2015
    1.40 ppb Yes No

  • Bromodichloromethane

    cancer

    Bromodichloromethane, one of the total trihalomethanes (TTHMs), is formed when chlorine or other disinfectants are used to treat drinking water. Bromodichloromethane and other disinfection byproducts increase the risk of cancer and may cause problems during pregnancy. Click here to read more about disinfection byproducts.

    STATE

    NATIONAL

    THIS UTILITY

    How your levels compare

    HEALTH GUIDELINE:
    0.06 ppb
    4.38 ppb
    4.29 ppb
    6.35 ppb
    The State and National averages were calculated using the averages of the contaminant measurements for each utility in 2015.
    ppb = parts per billion.

    Health risks of bromodichloromethane in excess of health guideline

    The health guideline of 0.06 ppb for bromodichloromethane was proposed in 2018 by the California Office of Environmental Health Hazard Assessment as a one-in-a-million lifetime risk of cancer. Values greater than one-in-a-million cancer risk level can result in increased cancer cases above one in a million people.

    Testing summary by quarter

    NOT TESTED

    NOT DETECTED

    DETECTED

    ABOVE HEALTH GUIDELINE

    • Utility Average 2015: 6.35 ppb
    • Health Guideline Exceeded 2015: Yes
    • Legal Limit Exceeded 2015: No
    Utility
    Average
    2015
    Health
    Guideline
    Exceeded
    2015
    Legal
    Limit
    Exceeded
    2015
    2010 2011 2012 2013 2014 2015
    6.35 ppb Yes No

  • Chloroform

    cancer

    Chloroform, one of the total trihalomethanes (TTHMs), is formed when chlorine or other disinfectants are used to treat drinking water. Chloroform and other disinfection byproducts increase the risk of cancer and may cause problems during pregnancy.

    STATE

    NATIONAL

    THIS UTILITY

    How your levels compare

    HEALTH GUIDELINE:
    0.4 ppb
    11.5 ppb
    6.64 ppb
    19.6 ppb
    The State and National averages were calculated using the averages of the contaminant measurements for each utility in 2015.
    ppb = parts per billion.

    Health risks of chloroform in excess of health guideline

    The health guideline of 0.4 ppb for chloroform was proposed in 2018 by the California Office of Environmental Health Hazard Assessment as a one-in-a-million lifetime risk of cancer. Values greater than one-in-a-million cancer risk level can result in increased cancer cases above one in a million people.

    Testing summary by quarter

    NOT TESTED

    NOT DETECTED

    DETECTED

    ABOVE HEALTH GUIDELINE

    • Utility Average 2015: 19.6 ppb
    • Health Guideline Exceeded 2015: Yes
    • Legal Limit Exceeded 2015: No
    Utility
    Average
    2015
    Health
    Guideline
    Exceeded
    2015
    Legal
    Limit
    Exceeded
    2015
    2010 2011 2012 2013 2014 2015
    19.6 ppb Yes No

  • Chromium (hexavalent)

    cancer

    Chromium (hexavalent) is a carcinogen that commonly contaminates American drinking water. Chromium (hexavalent) in drinking water may be due to industrial pollution or natural occurrences in mineral deposits and groundwater. Read more about chromium (hexavalent).

    STATE

    NATIONAL

    THIS UTILITY

    How your levels compare

    HEALTH GUIDELINE:
    0.02 ppb
    0.782 ppb
    0.265 ppb
    0.747 ppb
    The State and National averages were calculated using the averages of the contaminant measurements for each utility in 2010-2015.
    ppb = parts per billion.

    Health risks of chromium (hexavalent) in excess of health guideline

    The health guideline of 0.02 ppb for chromium (hexavalent) was defined by the California Office of Environmental Health Hazard Assessment as a public health goal, the level of a drinking water contaminant that does not pose a significant health risk. This health guideline protects against cancer.

    Testing summary by quarter

    NOT TESTED

    NOT DETECTED

    DETECTED

    ABOVE HEALTH GUIDELINE

    • Utility Average 2010-2015: 0.747 ppb
    • Health Guideline Exceeded 2010-2015: Yes
    • Legal Limit Exceeded 2010-2015: No
    Utility
    Average
    2010-2015
    Health
    Guideline
    Exceeded
    2010-2015
    Legal
    Limit
    Exceeded
    2010-2015
    2010 2011 2012 2013 2014 2015
    0.747 ppb Yes No

  • Dibromochloromethane

    cancer

    Dibromochloromethane, one of the total trihalomethanes (TTHMs), is formed when chlorine or other disinfectants are used to treat drinking water. Dibromochloromethane and other disinfection byproducts increase the risk of cancer and may cause problems during pregnancy. Click here to read more about disinfection byproducts.

    STATE

    NATIONAL

    THIS UTILITY

    How your levels compare

    HEALTH GUIDELINE:
    0.1 ppb
    3.01 ppb
    3.99 ppb
    1.45 ppb
    The State and National averages were calculated using the averages of the contaminant measurements for each utility in 2015.
    ppb = parts per billion.

    Health risks of dibromochloromethane in excess of health guideline

    The health guideline of 0.1 ppb for dibromochloromethane was proposed in 2018 by the California Office of Environmental Health Hazard Assessment as a one-in-a-million lifetime risk of cancer. Values greater than one-in-a-million cancer risk level can result in increased cancer cases above one in a million people.

    Testing summary by quarter

    NOT TESTED

    NOT DETECTED

    DETECTED

    ABOVE HEALTH GUIDELINE

    • Utility Average 2015: 1.45 ppb
    • Health Guideline Exceeded 2015: Yes
    • Legal Limit Exceeded 2015: No
    Utility
    Average
    2015
    Health
    Guideline
    Exceeded
    2015
    Legal
    Limit
    Exceeded
    2015
    2010 2011 2012 2013 2014 2015
    1.45 ppb Yes No

  • Dichloroacetic acid

    cancer

    Dichloroacetic acid, one of the group of five haloacetic acids regulated by federal standards, is formed when chlorine or other disinfectants are used to treat drinking water. Haloacetic acids and other disinfection byproducts increase the risk of cancer and may cause problems during pregnancy. Click here to read more about disinfection byproducts.

    STATE

    NATIONAL

    THIS UTILITY

    How your levels compare

    HEALTH GUIDELINE:
    0.7 ppb
    6.07 ppb
    6.35 ppb
    21.3 ppb
    The State and National averages were calculated using the averages of the contaminant measurements for each utility in 2015.
    ppb = parts per billion.

    Health risks of dichloroacetic acid in excess of health guideline

    The health guideline of 0.7 ppb for dichloroacetic acid was defined by the Environmental Protection Agency as a one-in-a-million lifetime risk of cancer. Values greater than one-in-a-million cancer risk level can result in increased cancer cases above one in a million people.

    Testing summary by quarter

    NOT TESTED

    NOT DETECTED

    DETECTED

    ABOVE HEALTH GUIDELINE

    • Utility Average 2015: 21.3 ppb
    • Health Guideline Exceeded 2015: Yes
    • Legal Limit Exceeded 2015: No
    Utility
    Average
    2015
    Health
    Guideline
    Exceeded
    2015
    Legal
    Limit
    Exceeded
    2015
    2010 2011 2012 2013 2014 2015
    21.3 ppb Yes No

  • Radiological contaminants

    cancer

    This utility detected Radium, combined (-226 & -228), Radium-226, Radium-228 & Uranium.

    Radiological contaminants leach into water from certain minerals and from mining. Drinking water contamination with radioactive substances increases the risk of cancer and may harm fetal development.

  • Total trihalomethanes (TTHMs)

    cancer

    Trihalomethanes are cancer-causing contaminants that form during water treatment with chlorine and other disinfectants. The total trihalomethanes group includes four chemicals: chloroform, bromodichloromethane, dibromochloromethane and bromoform.

    STATE

    NATIONAL

    THIS UTILITY

    How your levels compare

    HEALTH GUIDELINE:
    0.8 ppb
    23.7 ppb
    25.8 ppb
    38.1 ppb
    The State and National averages were calculated using the averages of the contaminant measurements for each utility in 2015.
    ppb = parts per billion.

    Health risks of trihalomethanes in excess of health guideline

    The health guideline of 0.8 ppb for trihalomethanes was defined by the California Office of Environmental Health Hazard Assessment as a draft public health goal, the level of drinking water contaminant that does not pose a significant health risk. This health guideline protects against cancer.

    Testing summary by quarter

    NOT TESTED

    NOT DETECTED

    DETECTED

    ABOVE HEALTH GUIDELINE

    ABOVE LEGAL LIMIT

    • Utility Average 2015: 38.1 ppb
    • Health Guideline Exceeded 2015: Yes
    • Legal Limit Exceeded 2015: No
    Utility
    Average
    2015
    Health
    Guideline
    Exceeded
    2015
    Legal
    Limit
    Exceeded
    2015
    2010 2011 2012 2013 2014 2015
    38.1 ppb Yes No

  • Trichloroacetic acid

    cancer

    Trichloroacetic acid, one of the group of five haloacetic acids regulated by federal standards, is formed when chlorine or other disinfectants are used to treat drinking water. Haloacetic acids and other disinfection byproducts increase the risk of cancer and may cause problems during pregnancy. Click here to read more about disinfection byproducts.

    STATE

    NATIONAL

    THIS UTILITY

    How your levels compare

    HEALTH GUIDELINE:
    0.5 ppb
    4.96 ppb
    3.33 ppb
    7.41 ppb
    The State and National averages were calculated using the averages of the contaminant measurements for each utility in 2015.
    ppb = parts per billion.

    Health risks of trichloroacetic acid in excess of health guideline

    The health guideline of 0.5 ppb for trichloroacetic acid was defined by the Environmental Protection Agency as a one-in-a-million lifetime risk of cancer. Values greater than one-in-a-million cancer risk level can result in increased cancer cases above one in a million people.

    Testing summary by quarter

    NOT TESTED

    NOT DETECTED

    DETECTED

    ABOVE HEALTH GUIDELINE

    • Utility Average 2015: 7.41 ppb
    • Health Guideline Exceeded 2015: Yes
    • Legal Limit Exceeded 2015: No
    Utility
    Average
    2015
    Health
    Guideline
    Exceeded
    2015
    Legal
    Limit
    Exceeded
    2015
    2010 2011 2012 2013 2014 2015
    7.41 ppb Yes No

    Includes chemicals detected in 2015 for which annual utility averages were lower than an EWG-selected health guideline established by a federal or state public health authority; chemicals detected under the EPA's Unregulated Contaminant Monitoring Rule (UCMR 3) program in 2013 to 2015, for which annual utility averages were lower than an EWG-selected health guideline established by a federal or state public health authority.

  • 1,4-Dioxane


    1,4-Dioxane is a solvent classified by the EPA as a likely human carcinogen. It contaminates groundwater in many states due to industrial wastewater discharges, plastic manufacturing runoff and landfill runoff.

    STATE

    NATIONAL

    THIS UTILITY

    How your levels compare

    HEALTH GUIDELINE:
    0.35 ppb
    0.0481 ppb
    0.00424 ppb
    0.00599 ppb
    The State and National averages were calculated using the averages of the contaminant measurements for each utility in 2010-2015.
    ppb = parts per billion.

    Health risks of 1,4-dioxane in excess of health guideline

    The health guideline of 0.35 ppb for 1,4-dioxane was defined by the Environmental Protection Agency as a one-in-a-million lifetime risk of cancer. Values greater than one-in-a-million cancer risk level can result in increased cancer cases above one in a million people.

    Testing summary by quarter

    NOT TESTED

    NOT DETECTED

    DETECTED

    ABOVE HEALTH GUIDELINE

    • Utility Average 2010-2015: 0.00599 ppb
    • Health Guideline Exceeded 2010-2015: No
    • Legal Limit Exceeded 2010-2015: No
    Utility
    Average
    2010-2015
    Health
    Guideline
    Exceeded
    2010-2015
    Legal
    Limit
    Exceeded
    2010-2015
    2010 2011 2012 2013 2014 2015
    0.00599 ppb No No

  • Aluminum


    Aluminum is a metal released from metal refineries and mining operations. Too much aluminum exposure can impair children's brain development.

    STATE

    NATIONAL

    THIS UTILITY

    How your levels compare

    HEALTH GUIDELINE:
    600 ppb
    19.9 ppb
    24.8 ppb
    32.9 ppb
    The State and National averages were calculated using the averages of the contaminant measurements for each utility in 2015.
    ppb = parts per billion.

    Health risks of aluminum in excess of health guideline

    The health guideline of 600 ppb for aluminum was defined by the California Office of Environmental Health Hazard Assessment as a public health goal, the level of a drinking water contaminant that does not pose a significant health risk. This health guideline protects against harm to the brain and nervous system.

    Testing summary by quarter

    NOT TESTED

    NOT DETECTED

    DETECTED

    ABOVE HEALTH GUIDELINE

    • Utility Average 2015: 32.9 ppb
    • Health Guideline Exceeded 2015: No
    • Legal Limit Exceeded 2015: No
    Utility
    Average
    2015
    Health
    Guideline
    Exceeded
    2015
    Legal
    Limit
    Exceeded
    2015
    2010 2011 2012 2013 2014 2015
    32.9 ppb No No

  • Atrazine


    Atrazine is a herbicide commonly detected in drinking water that comes from cornfield and other agricultural runoff. It is a hormone disrupter that harms the male and female reproductive systems of people and wildlife.

    STATE

    NATIONAL

    THIS UTILITY

    How your levels compare

    HEALTH GUIDELINE:
    0.1 ppb
    0.0135 ppb
    0.0188 ppb
    0.0533 ppb
    The State and National averages were calculated using the averages of the contaminant measurements for each utility in 2015.
    ppb = parts per billion.

    Health risks of atrazine in excess of health guideline

    The health guideline of 0.1 ppb for atrazine was defined by EWG based on epidemiological studies of human exposure to atrazine in drinking water.. This health guideline protects against harm to the developing fetus, harm to the reproductive system and hormone disruption.

    Testing summary by quarter

    NOT TESTED

    NOT DETECTED

    DETECTED

    ABOVE HEALTH GUIDELINE

    ABOVE LEGAL LIMIT

    • Utility Average 2015: 0.0533 ppb
    • Health Guideline Exceeded 2015: No
    • Legal Limit Exceeded 2015: No
    Utility
    Average
    2015
    Health
    Guideline
    Exceeded
    2015
    Legal
    Limit
    Exceeded
    2015
    2010 2011 2012 2013 2014 2015
    0.0533 ppb No No

  • Barium


    Barium is a mineral present in rocks, soil and water. High concentrations of barium in drinking water increase the risk of cardiovascular disease and hypertension.

    STATE

    NATIONAL

    THIS UTILITY

    How your levels compare

    HEALTH GUIDELINE:
    700 ppb
    68.2 ppb
    108.6 ppb
    114.3 ppb
    The State and National averages were calculated using the averages of the contaminant measurements for each utility in 2015.
    ppb = parts per billion.

    Health risks of barium in excess of health guideline

    The health guideline of 700 ppb for barium was defined by the Environmental Protection Agency as a children's health-based limit for 10-day exposure, a non-enforceable federal health advisory. This health guideline protects against harm to internal organs.

    Testing summary by quarter

    NOT TESTED

    NOT DETECTED

    DETECTED

    ABOVE HEALTH GUIDELINE

    ABOVE LEGAL LIMIT

    • Utility Average 2015: 114.3 ppb
    • Health Guideline Exceeded 2015: No
    • Legal Limit Exceeded 2015: No
    Utility
    Average
    2015
    Health
    Guideline
    Exceeded
    2015
    Legal
    Limit
    Exceeded
    2015
    2010 2011 2012 2013 2014 2015
    114.3 ppb No No

  • Bromochloroacetic acid


    Bromochloroacetic acid is formed when chlorine or other disinfectants are used to treat drinking water. Bromochloroacetic acid and other disinfection byproducts increase the risk of cancer and may cause problems during pregnancy.

    STATE

    NATIONAL

    THIS UTILITY

    How your levels compare

    2.60 ppb
    3.12 ppb
    5.21 ppb
    The State and National averages were calculated using the averages of the contaminant measurements for each utility in 2015.
    ppb = parts per billion.

    Testing summary by quarter

    NOT TESTED

    NOT DETECTED

    DETECTED

    • Utility Average 2015: 5.21 ppb
    • Health Guideline Exceeded 2015: No
    • Legal Limit Exceeded 2015: No
    Utility
    Average
    2015
    Health
    Guideline
    Exceeded
    2015
    Legal
    Limit
    Exceeded
    2015
    2010 2011 2012 2013 2014 2015
    5.21 ppb No No

  • Bromochloromethane


    Bromochloromethane is a tap water disinfection byproduct; it is also used as an intermediate in chemical manufacturing and as a fire extinguishing agent. Disinfection byproducts in drinking water increase the risk of cancer.

    STATE

    NATIONAL

    THIS UTILITY

    How your levels compare

    0.0170 ppb
    0.00347 ppb
    0.000484 ppb
    The State and National averages were calculated using the averages of the contaminant measurements for each utility in 2010-2015.
    ppb = parts per billion.

    Testing summary by quarter

    NOT TESTED

    NOT DETECTED

    DETECTED

    • Utility Average 2010-2015: 0.000484 ppb
    • Health Guideline Exceeded 2010-2015: No
    • Legal Limit Exceeded 2010-2015: No
    Utility
    Average
    2010-2015
    Health
    Guideline
    Exceeded
    2010-2015
    Legal
    Limit
    Exceeded
    2010-2015
    2010 2011 2012 2013 2014 2015
    0.000484 ppb No No

  • Bromoform


    Bromoform, one of the total trihalomethanes (TTHMs), is formed when chlorine or other disinfectants are used to treat drinking water. Bromoform and other disinfection byproducts increase the risk of cancer and may cause problems during pregnancy. Click here to read more about disinfection byproducts.

    STATE

    NATIONAL

    THIS UTILITY

    How your levels compare

    HEALTH GUIDELINE:
    0.5 ppb
    1.77 ppb
    3.22 ppb
    0.0804 ppb
    The State and National averages were calculated using the averages of the contaminant measurements for each utility in 2015.
    ppb = parts per billion.

    Health risks of bromoform in excess of health guideline

    The health guideline of 0.5 ppb for bromoform was proposed in 2018 by the California Office of Environmental Health Hazard Assessment as a one-in-a-million lifetime risk of cancer. Values greater than one-in-a-million cancer risk level can result in increased cancer cases above one in a million people.

    Testing summary by quarter

    NOT TESTED

    NOT DETECTED

    DETECTED

    ABOVE HEALTH GUIDELINE

    • Utility Average 2015: 0.0804 ppb
    • Health Guideline Exceeded 2015: No
    • Legal Limit Exceeded 2015: No
    Utility
    Average
    2015
    Health
    Guideline
    Exceeded
    2015
    Legal
    Limit
    Exceeded
    2015
    2010 2011 2012 2013 2014 2015
    0.0804 ppb No No

  • Chlorate


    Chlorate forms in drinking water as a byproduct of disinfection. Chlorate impairs thyroid function, making chlorate exposure most harmful during pregnancy and childhood.

    STATE

    NATIONAL

    THIS UTILITY

    How your levels compare

    HEALTH GUIDELINE:
    210 ppb
    114.0 ppb
    139.7 ppb
    31.3 ppb
    The State and National averages were calculated using the averages of the contaminant measurements for each utility in 2010-2015.
    ppb = parts per billion.

    Health risks of chlorate in excess of health guideline

    The health guideline of 210 ppb for chlorate was defined by the Environmental Protection Agency as a benchmark for testing under the Unregulated Contaminant Monitoring Rule program. This health guideline protects against hormone disruption.

    Testing summary by quarter

    NOT TESTED

    NOT DETECTED

    DETECTED

    ABOVE HEALTH GUIDELINE

    • Utility Average 2010-2015: 31.3 ppb
    • Health Guideline Exceeded 2010-2015: No
    • Legal Limit Exceeded 2010-2015: No
    Utility
    Average
    2010-2015
    Health
    Guideline
    Exceeded
    2010-2015
    Legal
    Limit
    Exceeded
    2010-2015
    2010 2011 2012 2013 2014 2015
    31.3 ppb No No

  • Chloromethane


    Chloromethane is an industrial solvent, aerosol propellant and a refrigerant. It also forms as a byproduct of water disinfection. The EPA classifies chloromethane as possibly carcinogenic to humans.

    STATE

    NATIONAL

    THIS UTILITY

    How your levels compare

    HEALTH GUIDELINE:
    2.69 ppb
    0.0312 ppb
    0.0362 ppb
    0.0270 ppb
    The State and National averages were calculated using the averages of the contaminant measurements for each utility in 2010-2015.
    ppb = parts per billion.

    Health risks of chloromethane in excess of health guideline

    The health guideline of 2.69 ppb for chloromethane was defined by the Environmental Protection Agency as a benchmark for testing under the Unregulated Contaminant Monitoring Rule program. This health guideline protects against cancer.

    Testing summary by quarter

    NOT TESTED

    NOT DETECTED

    DETECTED

    ABOVE HEALTH GUIDELINE

    • Utility Average 2010-2015: 0.0270 ppb
    • Health Guideline Exceeded 2010-2015: No
    • Legal Limit Exceeded 2010-2015: No
    Utility
    Average
    2010-2015
    Health
    Guideline
    Exceeded
    2010-2015
    Legal
    Limit
    Exceeded
    2010-2015
    2010 2011 2012 2013 2014 2015
    0.0270 ppb No No

  • Chromium (total)


    Chromium is a naturally occurring metal, but industrial uses can elevate its levels in water. One form, hexavalent chromium, causes cancer. Total chromium is not a good indicator of the amount of hexavalent chromium in drinking water.

    STATE

    NATIONAL

    THIS UTILITY

    How your levels compare

    0.637 ppb
    0.508 ppb
    0.435 ppb
    The State and National averages were calculated using the averages of the contaminant measurements for each utility in 2010-2015.
    ppb = parts per billion.

    Testing summary by quarter

    NOT TESTED

    NOT DETECTED

    DETECTED

    ABOVE LEGAL LIMIT

    • Utility Average 2010-2015: 0.435 ppb
    • Health Guideline Exceeded 2010-2015: No
    • Legal Limit Exceeded 2010-2015: No
    Utility
    Average
    2010-2015
    Health
    Guideline
    Exceeded
    2010-2015
    Legal
    Limit
    Exceeded
    2010-2015
    2010 2011 2012 2013 2014 2015
    0.435 ppb No No

  • Cobalt


    Cobalt is a metal found throughout the environment; people may be exposed to cobalt in air, food and drinking water.

    STATE

    NATIONAL

    THIS UTILITY

    How your levels compare

    HEALTH GUIDELINE:
    70 ppb
    0.0927 ppb
    0.00507 ppb
    0.0106 ppb
    The State and National averages were calculated using the averages of the contaminant measurements for each utility in 2010-2015.
    ppb = parts per billion.

    Health risks of cobalt in excess of health guideline

    The health guideline of 70 ppb for cobalt was defined by the Environmental Protection Agency as a benchmark for testing under the Unregulated Contaminant Monitoring Rule program. This health guideline protects against change in blood chemistry.

    Testing summary by quarter

    NOT TESTED

    NOT DETECTED

    DETECTED

    ABOVE HEALTH GUIDELINE

    • Utility Average 2010-2015: 0.0106 ppb
    • Health Guideline Exceeded 2010-2015: No
    • Legal Limit Exceeded 2010-2015: No
    Utility
    Average
    2010-2015
    Health
    Guideline
    Exceeded
    2010-2015
    Legal
    Limit
    Exceeded
    2010-2015
    2010 2011 2012 2013 2014 2015
    0.0106 ppb No No

  • Cyanide


    Cyanide is a toxic chemical that causes central nervous system and thyroid toxicity. Water contamination is generally the result of metal mining and chemical industry waste, runoff from agriculture and road salts used for melting ice.

    STATE

    NATIONAL

    THIS UTILITY

    How your levels compare

    2.33 ppb
    26.8 ppb
    24.4 ppb
    The State and National averages were calculated using the averages of the contaminant measurements for each utility in 2015.
    ppb = parts per billion.

    Testing summary by quarter

    NOT TESTED

    NOT DETECTED

    DETECTED

    ABOVE LEGAL LIMIT

    • Utility Average 2015: 24.4 ppb
    • Health Guideline Exceeded 2015: No
    • Legal Limit Exceeded 2015: No
    Utility
    Average
    2015
    Health
    Guideline
    Exceeded
    2015
    Legal
    Limit
    Exceeded
    2015
    2010 2011 2012 2013 2014 2015
    24.4 ppb No No

  • Di(2-ethylhexyl) phthalate


    Di(2-ethylhexyl) phthalate, or DEHP, is a softener added to PVC plastics. Phthalates are hormone disruptors that target the male reproductive system.

    STATE

    NATIONAL

    THIS UTILITY

    How your levels compare

    HEALTH GUIDELINE:
    3 ppb
    0.0432 ppb
    0.0777 ppb
    0.227 ppb
    The State and National averages were calculated using the averages of the contaminant measurements for each utility in 2015.
    ppb = parts per billion.

    Health risks of di(2-ethylhexyl) phthalate in excess of health guideline

    The health guideline of 3 ppb for di(2-ethylhexyl) phthalate was defined by the Environmental Protection Agency as a one-in-a-million lifetime risk of cancer. Values greater than one-in-a-million cancer risk level can result in increased cancer cases above one in a million people.

    Testing summary by quarter

    NOT TESTED

    NOT DETECTED

    DETECTED

    ABOVE HEALTH GUIDELINE

    ABOVE LEGAL LIMIT

    • Utility Average 2015: 0.227 ppb
    • Health Guideline Exceeded 2015: No
    • Legal Limit Exceeded 2015: No
    Utility
    Average
    2015
    Health
    Guideline
    Exceeded
    2015
    Legal
    Limit
    Exceeded
    2015
    2010 2011 2012 2013 2014 2015
    0.227 ppb No No

  • Dibromoacetic acid


    Dibromoacetic acid, one of the group of five haloacetic acids regulated by federal standards, is formed when chlorine or other disinfectants are used to treat drinking water. Haloacetic acids and other disinfection byproducts increase the risk of cancer and may cause problems during pregnancy. Click here to read more about disinfection byproducts.

    STATE

    NATIONAL

    THIS UTILITY

    How your levels compare

    1.15 ppb
    2.10 ppb
    1.78 ppb
    The State and National averages were calculated using the averages of the contaminant measurements for each utility in 2015.
    ppb = parts per billion.

    Testing summary by quarter

    NOT TESTED

    NOT DETECTED

    DETECTED

    • Utility Average 2015: 1.78 ppb
    • Health Guideline Exceeded 2015: No
    • Legal Limit Exceeded 2015: No
    Utility
    Average
    2015
    Health
    Guideline
    Exceeded
    2015
    Legal
    Limit
    Exceeded
    2015
    2010 2011 2012 2013 2014 2015
    1.78 ppb No No

  • Fluoride


    Fluoride occurs naturally in surface and groundwater and is also added to drinking water by many water systems.

    STATE

    NATIONAL

    THIS UTILITY

    How your levels compare

    0.440 ppm
    0.684 ppm
    0.254 ppm
    The State and National averages were calculated using the averages of the contaminant measurements for each utility in 2015.
    ppm = parts per million.

    Testing summary by quarter

    NOT TESTED

    NOT DETECTED

    DETECTED

    ABOVE LEGAL LIMIT

    • Utility Average 2015: 0.254 ppm
    • Health Guideline Exceeded 2015: No
    • Legal Limit Exceeded 2015: No
    Utility
    Average
    2015
    Health
    Guideline
    Exceeded
    2015
    Legal
    Limit
    Exceeded
    2015
    2010 2011 2012 2013 2014 2015
    0.254 ppm No No

  • Haloacetic acids (HAA5)


    Haloacetic acids are formed when disinfectants such as chlorine are added to tap water. The group of five haloacetic acids regulated by federal standards includes monochloroacetic acid, dichloroacetic acid, trichloroacetic acid, monobromoacetic acid and dibromoacetic acid.

    STATE

    NATIONAL

    THIS UTILITY

    How your levels compare

    12.9 ppb
    12.6 ppb
    32.1 ppb
    The State and National averages were calculated using the averages of the contaminant measurements for each utility in 2015.
    ppb = parts per billion.

    Testing summary by quarter

    NOT TESTED

    NOT DETECTED

    DETECTED

    ABOVE LEGAL LIMIT

    • Utility Average 2015: 32.1 ppb
    • Health Guideline Exceeded 2015: No
    • Legal Limit Exceeded 2015: No
    Utility
    Average
    2015
    Health
    Guideline
    Exceeded
    2015
    Legal
    Limit
    Exceeded
    2015
    2010 2011 2012 2013 2014 2015
    32.1 ppb No No

  • Hexadecanoic acid


    Hexadecanoic acid, also called palmitic acid, is a naturally occurring fatty acid found in animal and plant lipids.

    STATE

    NATIONAL

    THIS UTILITY

    How your levels compare

    3.26 ppb
    3.26 ppb
    2.70 ppb
    The State and National averages were calculated using the averages of the contaminant measurements for each utility in 2015.
    ppb = parts per billion.

    Testing summary by quarter

    NOT TESTED

    NOT DETECTED

    DETECTED

    • Utility Average 2015: 2.70 ppb
    • Health Guideline Exceeded 2015: No
    • Legal Limit Exceeded 2015: No
    Utility
    Average
    2015
    Health
    Guideline
    Exceeded
    2015
    Legal
    Limit
    Exceeded
    2015
    2010 2011 2012 2013 2014 2015
    2.70 ppb No No

  • Manganese


    Manganese is a naturally occurring element that is common in food and drinking water. Excessive manganese exposures may impair children's attention, memory and intellectual capacity. Click here to read more about manganese.

    STATE

    NATIONAL

    THIS UTILITY

    How your levels compare

    HEALTH GUIDELINE:
    100 ppb
    28.1 ppb
    15.2 ppb
    16.0 ppb
    The State and National averages were calculated using the averages of the contaminant measurements for each utility in 2015.
    ppb = parts per billion.

    Health risks of manganese in excess of health guideline

    The health guideline of 100 ppb for manganese was defined by Minnesota as a risk assessment advisory level, a non-enforceable guideline. This health guideline protects against harm to the brain and nervous system.

    Testing summary by quarter

    NOT TESTED

    NOT DETECTED

    DETECTED

    ABOVE HEALTH GUIDELINE

    • Utility Average 2015: 16.0 ppb
    • Health Guideline Exceeded 2015: No
    • Legal Limit Exceeded 2015: No
    Utility
    Average
    2015
    Health
    Guideline
    Exceeded
    2015
    Legal
    Limit
    Exceeded
    2015
    2010 2011 2012 2013 2014 2015
    16.0 ppb No No

  • Methyl isobutyl ketone


    Methyl isobutyl ketone is a solvent used in coatings and adhesives.

    STATE

    NATIONAL

    THIS UTILITY

    How your levels compare

    0.145 ppb
    0.148 ppb
    0.146 ppb
    The State and National averages were calculated using the averages of the contaminant measurements for each utility in 2015.
    ppb = parts per billion.

    Testing summary by quarter

    NOT TESTED

    NOT DETECTED

    DETECTED

    • Utility Average 2015: 0.146 ppb
    • Health Guideline Exceeded 2015: No
    • Legal Limit Exceeded 2015: No
    Utility
    Average
    2015
    Health
    Guideline
    Exceeded
    2015
    Legal
    Limit
    Exceeded
    2015
    2010 2011 2012 2013 2014 2015
    0.146 ppb No No

  • Molybdenum


    Molybdenum is a metal that occurs naturally in soil, minerals and water. People who ingest large amounts can have increased levels of uric acid and gout-like symptoms.

    STATE

    NATIONAL

    THIS UTILITY

    How your levels compare

    HEALTH GUIDELINE:
    40 ppb
    1.61 ppb
    2.13 ppb
    1.99 ppb
    The State and National averages were calculated using the averages of the contaminant measurements for each utility in 2010-2015.
    ppb = parts per billion.

    Health risks of molybdenum in excess of health guideline

    The health guideline of 40 ppb for molybdenum was defined by the Environmental Protection Agency as a lifetime health-based limit for effects other than cancer. This health guideline protects against an increased risk of gout.

    Testing summary by quarter

    NOT TESTED

    NOT DETECTED

    DETECTED

    ABOVE HEALTH GUIDELINE

    • Utility Average 2010-2015: 1.99 ppb
    • Health Guideline Exceeded 2010-2015: No
    • Legal Limit Exceeded 2010-2015: No
    Utility
    Average
    2010-2015
    Health
    Guideline
    Exceeded
    2010-2015
    Legal
    Limit
    Exceeded
    2010-2015
    2010 2011 2012 2013 2014 2015
    1.99 ppb No No

  • Monobromoacetic acid


    Monobromoacetic acid, one of the group of five haloacetic acids regulated by federal standards, is formed when chlorine or other disinfectants are used to treat drinking water. Haloacetic acids and other disinfection byproducts increase the risk of cancer and may cause problems during pregnancy. Click here to read more about disinfection byproducts.

    STATE

    NATIONAL

    THIS UTILITY

    How your levels compare

    0.172 ppb
    0.130 ppb
    0.0159 ppb
    The State and National averages were calculated using the averages of the contaminant measurements for each utility in 2015.
    ppb = parts per billion.

    Testing summary by quarter

    NOT TESTED

    NOT DETECTED

    DETECTED

    • Utility Average 2015: 0.0159 ppb
    • Health Guideline Exceeded 2015: No
    • Legal Limit Exceeded 2015: No
    Utility
    Average
    2015
    Health
    Guideline
    Exceeded
    2015
    Legal
    Limit
    Exceeded
    2015
    2010 2011 2012 2013 2014 2015
    0.0159 ppb No No

  • Monochloroacetic acid


    Monochloroacetic acid, one of the group of five haloacetic acids regulated by federal standards, is formed when chlorine or other disinfectants are used to treat drinking water. Haloacetic acids and other disinfection byproducts increase the risk of cancer and may cause problems during pregnancy. Click here to read more about disinfection byproducts.

    STATE

    NATIONAL

    THIS UTILITY

    How your levels compare

    0.538 ppb
    0.827 ppb
    1.63 ppb
    The State and National averages were calculated using the averages of the contaminant measurements for each utility in 2015.
    ppb = parts per billion.

    Testing summary by quarter

    NOT TESTED

    NOT DETECTED

    DETECTED

    • Utility Average 2015: 1.63 ppb
    • Health Guideline Exceeded 2015: No
    • Legal Limit Exceeded 2015: No
    Utility
    Average
    2015
    Health
    Guideline
    Exceeded
    2015
    Legal
    Limit
    Exceeded
    2015
    2010 2011 2012 2013 2014 2015
    1.63 ppb No No

  • Nitrate


    Nitrate, a fertilizer chemical, frequently contaminates drinking water due to agricultural and urban runoff, and discharges from municipal wastewater treatment plants and septic tanks. Excessive nitrate in water can cause oxygen deprivation in infants and increase the risk of cancer. Click here to read more about nitrate.

    STATE

    NATIONAL

    THIS UTILITY

    How your levels compare

    HEALTH GUIDELINE:
    5 ppm
    1.00 ppm
    0.621 ppm
    0.192 ppm
    The State and National averages were calculated using the averages of the contaminant measurements for each utility in 2015.
    ppm = parts per million.

    Health risks of nitrate in excess of health guideline

    The health guideline of 5 ppm for nitrate was defined by EWG based on studies by scientists at the National Cancer Institute and other independent researchers. This health guideline protects against cancer and harm to fetal growth and development.

    Testing summary by quarter

    NOT TESTED

    NOT DETECTED

    DETECTED

    ABOVE HEALTH GUIDELINE

    ABOVE LEGAL LIMIT

    • Utility Average 2015: 0.192 ppm
    • Health Guideline Exceeded 2015: No
    • Legal Limit Exceeded 2015: No
    Utility
    Average
    2015
    Health
    Guideline
    Exceeded
    2015
    Legal
    Limit
    Exceeded
    2015
    2010 2011 2012 2013 2014 2015
    0.192 ppm No No

  • Nitrate and nitrite


    Nitrate and nitrite enter water from fertilizer runoff, septic tanks and urban runoff. These contaminants can cause oxygen deprivation for infants and increase the risk of cancer. Nitrite is significantly more toxic than nitrate. Click here to read more about nitrate.

    STATE

    NATIONAL

    THIS UTILITY

    How your levels compare

    HEALTH GUIDELINE:
    5 ppm
    0.724 ppm
    0.743 ppm
    0.107 ppm
    The State and National averages were calculated using the averages of the contaminant measurements for each utility in 2015.
    ppm = parts per million.

    Health risks of nitrate and nitrite in excess of health guideline

    The health guideline of 5 ppm for nitrate and nitrite was defined by EWG based on studies by scientists at the National Cancer Institute and other independent researchers. This health guideline protects against cancer and harm to fetal growth and development.

    Testing summary by quarter

    NOT TESTED

    NOT DETECTED

    DETECTED

    ABOVE HEALTH GUIDELINE

    ABOVE LEGAL LIMIT

    • Utility Average 2015: 0.107 ppm
    • Health Guideline Exceeded 2015: No
    • Legal Limit Exceeded 2015: No
    Utility
    Average
    2015
    Health
    Guideline
    Exceeded
    2015
    Legal
    Limit
    Exceeded
    2015
    2010 2011 2012 2013 2014 2015
    0.107 ppm No No

  • Nitrite


    Nitrite, closely related to the fertilizer chemical nitrate, comes from urban runoff and from fertilizer applied to agricultural lands to pollute drinking water. Nitrite is significantly more toxic than nitrate. Excessive nitrite in water can cause oxygen deprivation in infants and increase the risk of cancer.

    STATE

    NATIONAL

    THIS UTILITY

    How your levels compare

    0.00441 ppm
    0.00863 ppm
    0.000357 ppm
    The State and National averages were calculated using the averages of the contaminant measurements for each utility in 2015.
    ppm = parts per million.

    Testing summary by quarter

    NOT TESTED

    NOT DETECTED

    DETECTED

    ABOVE LEGAL LIMIT

    • Utility Average 2015: 0.000357 ppm
    • Health Guideline Exceeded 2015: No
    • Legal Limit Exceeded 2015: No
    Utility
    Average
    2015
    Health
    Guideline
    Exceeded
    2015
    Legal
    Limit
    Exceeded
    2015
    2010 2011 2012 2013 2014 2015
    0.000357 ppm No No

  • Selenium


    Selenium is an essential element in diets. But too much selenium can decrease thyroid hormone production and cause hair loss, skin lesions and brittle fingernails.

    STATE

    NATIONAL

    THIS UTILITY

    How your levels compare

    HEALTH GUIDELINE:
    30 ppb
    0.696 ppb
    2.44 ppb
    0.235 ppb
    The State and National averages were calculated using the averages of the contaminant measurements for each utility in 2015.
    ppb = parts per billion.

    Health risks of selenium in excess of health guideline

    The health guideline of 30 ppb for selenium was defined by the California Office of Environmental Health Hazard Assessment as a public health goal, the level of a drinking water contaminant that does not pose a significant health risk. This health guideline protects against hair loss and nail damage.

    Testing summary by quarter

    NOT TESTED

    NOT DETECTED

    DETECTED

    ABOVE HEALTH GUIDELINE

    ABOVE LEGAL LIMIT

    • Utility Average 2015: 0.235 ppb
    • Health Guideline Exceeded 2015: No
    • Legal Limit Exceeded 2015: No
    Utility
    Average
    2015
    Health
    Guideline
    Exceeded
    2015
    Legal
    Limit
    Exceeded
    2015
    2010 2011 2012 2013 2014 2015
    0.235 ppb No No

  • Simazine


    Simazine is a hormone-disrupting herbicide related to atrazine. It affects the male and female reproductive systems. In studies of laboratory animals, simazine increases blood levels of estrogen, decreases prolactin and progesterone, and causes mammary and ovarian tumors.

    STATE

    NATIONAL

    THIS UTILITY

    How your levels compare

    HEALTH GUIDELINE:
    0.1 ppb
    0.00159 ppb
    0.00523 ppb
    0.0250 ppb
    The State and National averages were calculated using the averages of the contaminant measurements for each utility in 2015.
    ppb = parts per billion.

    Health risks of simazine in excess of health guideline

    The health guideline of 0.1 ppb for simazine was defined by EWG based on epidemiological studies of human exposure to atrazine in drinking water. This health guideline protects against harm to the developing fetus, harm to the reproductive system and hormone disruption.

    Testing summary by quarter

    NOT TESTED

    NOT DETECTED

    DETECTED

    ABOVE HEALTH GUIDELINE

    ABOVE LEGAL LIMIT

    • Utility Average 2015: 0.0250 ppb
    • Health Guideline Exceeded 2015: No
    • Legal Limit Exceeded 2015: No
    Utility
    Average
    2015
    Health
    Guideline
    Exceeded
    2015
    Legal
    Limit
    Exceeded
    2015
    2010 2011 2012 2013 2014 2015
    0.0250 ppb No No

  • Strontium


    Strontium is a metal that accumulates in the bones. Radioactive strontium-90 can cause bone cancer and leukemia, and any form of strontium at high doses can harm bone health.

    STATE

    NATIONAL

    THIS UTILITY

    How your levels compare

    HEALTH GUIDELINE:
    1,500 ppb
    357.2 ppb
    598.6 ppb
    361.5 ppb
    The State and National averages were calculated using the averages of the contaminant measurements for each utility in 2010-2015.
    ppb = parts per billion.

    Health risks of strontium in excess of health guideline

    The health guideline of 1,500 ppb for strontium was defined by the Environmental Protection Agency as a benchmark for testing under the Unregulated Contaminant Monitoring Rule program. This health guideline protects against harm to bones.

    Testing summary by quarter

    NOT TESTED

    NOT DETECTED

    DETECTED

    ABOVE HEALTH GUIDELINE

    • Utility Average 2010-2015: 361.5 ppb
    • Health Guideline Exceeded 2010-2015: No
    • Legal Limit Exceeded 2010-2015: No
    Utility
    Average
    2010-2015
    Health
    Guideline
    Exceeded
    2010-2015
    Legal
    Limit
    Exceeded
    2010-2015
    2010 2011 2012 2013 2014 2015
    361.5 ppb No No

  • Vanadium


    Vanadium is a metal used in steels and other alloys. People are commonly exposed to vanadium in water and food. Excessive exposure can be toxic during pregnancy and childhood.

    STATE

    NATIONAL

    THIS UTILITY

    How your levels compare

    HEALTH GUIDELINE:
    21 ppb
    1.98 ppb
    2.03 ppb
    1.91 ppb
    The State and National averages were calculated using the averages of the contaminant measurements for each utility in 2010-2015.
    ppb = parts per billion.

    Health risks of vanadium in excess of health guideline

    The health guideline of 21 ppb for vanadium was defined by the Environmental Protection Agency as a benchmark for testing under the Unregulated Contaminant Monitoring Rule program. This health guideline protects against change in blood chemistry.

    Testing summary by quarter

    NOT TESTED

    NOT DETECTED

    DETECTED

    ABOVE HEALTH GUIDELINE

    • Utility Average 2010-2015: 1.91 ppb
    • Health Guideline Exceeded 2010-2015: No
    • Legal Limit Exceeded 2010-2015: No
    Utility
    Average
    2010-2015
    Health
    Guideline
    Exceeded
    2010-2015
    Legal
    Limit
    Exceeded
    2010-2015
    2010 2011 2012 2013 2014 2015
    1.91 ppb No No

  • Xylenes (total)


    Xylenes are solvents used in industrial and consumer products, such as cleaning agents and paint thinners. Xylenes cause nervous system damage and may harm developing fetuses.

    STATE

    NATIONAL

    THIS UTILITY

    How your levels compare

    HEALTH GUIDELINE:
    1,800 ppb
    0.143 ppb
    0.215 ppb
    0.218 ppb
    The State and National averages were calculated using the averages of the contaminant measurements for each utility in 2015.
    ppb = parts per billion.

    Health risks of xylenes in excess of health guideline

    The health guideline of 1,800 ppb for xylenes was defined by the California Office of Environmental Health Hazard Assessment as a public health goal, the level of a drinking water contaminant that does not pose a significant health risk. This health guideline protects against harm to the brain and nervous system.

    Testing summary by quarter

    NOT TESTED

    NOT DETECTED

    DETECTED

    ABOVE HEALTH GUIDELINE

    ABOVE LEGAL LIMIT

    • Utility Average 2015: 0.218 ppb
    • Health Guideline Exceeded 2015: No
    • Legal Limit Exceeded 2015: No
    Utility
    Average
    2015
    Health
    Guideline
    Exceeded
    2015
    Legal
    Limit
    Exceeded
    2015
    2010 2011 2012 2013 2014 2015
    0.218 ppb No No

Want to filter these contaminants out?

Pollution sources

Click on each pollution source to see from which source contaminants come.

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Agriculture

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industry icon

Industry

teardrop 25
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Treatment
byproducts

tear drop 16
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Runoff &
sprawl

teardrop 8
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Naturally
occuring

teardrop 20

  • Arsenic
  • Chlorate
  • Cyanide
  • Nitrate and nitrite
  • Nitrate
  • Nitrite
  • Simazine
  • Atrazine
  • Aluminum
  • Arsenic
  • Chlorate
  • Barium
  • Chromium (total)
  • Cyanide
  • Manganese
  • Selenium
  • Strontium
  • Chromium (hexavalent)
  • Cobalt
  • Molybdenum
  • Vanadium
  • Di(2-ethylhexyl) phthalate
  • 1,4-Dioxane
  • Chloromethane
  • Methyl isobutyl ketone
  • 1,2,3-Trichloropropane
  • Bromochloromethane
  • Xylenes (total)
  • Radium, combined (-226 & -228)
  • Radium-226
  • Radium-228
  • Hexadecanoic acid
  • Uranium
  • Aluminum
  • Arsenic
  • Barium
  • Chromium (total)
  • Cyanide
  • Manganese
  • Nitrate and nitrite
  • Nitrate
  • Nitrite
  • Selenium
  • Strontium
  • Chromium (hexavalent)
  • Cobalt
  • Molybdenum
  • Vanadium
  • Chloromethane
  • Radium, combined (-226 & -228)
  • Radium-226
  • Radium-228
  • Uranium
  • Cyanide
  • Nitrate and nitrite
  • Nitrate
  • Nitrite
  • Di(2-ethylhexyl) phthalate
  • 1,4-Dioxane
  • Xylenes (total)
  • Hexadecanoic acid
  • Chlorate
  • Fluoride
  • Chloromethane
  • Bromochloromethane
  • Monochloroacetic acid
  • Dichloroacetic acid
  • Trichloroacetic acid
  • Monobromoacetic acid
  • Dibromoacetic acid
  • Bromochloroacetic acid
  • Haloacetic acids (HAA5)
  • Chloroform
  • Bromoform
  • Bromodichloromethane
  • Dibromochloromethane
  • Total trihalomethanes (TTHMs)
Specific water contaminants can come from more than one source.

City of Houston compliance with legally mandated federal standards

  • From October 2014 to September 2017, City of Houston was in violation of health-based drinking water standards:
    No
  • 6 QUARTERS
    in violation of any federal drinking water standard from October 2014 to September 2017
Information in this section on City of Houston comes from the U.S. EPA Enforcement and Compliance History Online database. Click here for more information for this utility.

Other contaminants tested


Contaminants detected between 2010 and 2014 and were not part of EPA's UCMR-3 testing program:

Hexachlorocyclopentadiene, Tetrahydrofuran, Phenanthrene, N-Nitrosodimethylamine (NDMA), N-Nitrosopyrrolidine

 

Chemicals tested for but not detected from 2010 to 2015:

1,1,1,2-Tetrachloroethane, 1,1,1-Trichloroethane, 1,1,2,2-Tetrachloroethane, 1,1,2-Trichloroethane, 1,1-Dichloroethane, 1,1-Dichloroethylene, 1,1-Dichloropropene, 1,2,3-Trichlorobenzene, 1,2,4-Trichlorobenzene, 1,2,4-Trimethylbenzene, 1,2-Dibromo-3-chloropropane (DBCP), 1,2-Dichloroethane, 1,2-Dichloropropane, 1,3,5-Trimethylbenzene, 1,3-Butadiene, 1,3-Dichloropropane, 1,3-Dinitrobenzene, 17-beta-Estradiol, 2,2',4,4',5,5'-Hexabromobiphenyl ether, 2,2',4,4',5,5'-Hexabromodiphenyl ether, 2,2',4,4',5-Pentabromodiphenyl ether, 2,2',4,4',6-Pentabromodiphenyl ether, 2,2',4,4'-Tetrabromodiphenyl ether, 2,2-Dichloropropane, 2,3-Dichlorobiphenyl, 2,4,5-T, 2,4,5-TP (Silvex), 2,4,5-Trichlorobiphenyl, 2,4,6-Trinitrotoluene, 2,4-D, 2,4-DB, 2-Chlorobiphenyl, 2-Hexanone, 22'3'46-Pentachlorobiphenyl, 22'33'44'6-Heptachlorobiphenyl, 22'33'45'66'-Octachlorobiphenyl, 22'44'-Tetrachlorobiphenyl, 22'44'56'-Hexachlorobiphenyl, 3,5-Dichlorobenzoic acid, 3-Hydroxycarbofuran, 4-Androstene-3,17-dione, Acenaphthene, Acenaphthylene, Acetochlor, Acetochlor ethane sulfonic acid, Acetochlor oxanilic acid, Acetone, Acifluorfen (Blazer), Acrylonitrile, Alachlor (Lasso), Alachlor ESA, Alachlor oxanilic acid, Aldicarb, Aldicarb sulfone, Aldicarb sulfoxide, Aldrin, alpha-Chlordane, Anthracene, Antimony, Asbestos, Baygon (Propoxur), Bentazon (Basagran), Benzene, Benzo[a]anthracene, Benzo[a]pyrene, Benzo[b]fluoranthene, Benzo[g,h,i]perylene, Benzo[k]fluoranthene, Beryllium, Bromacil, Bromobenzene, Bromomethane, Butachlor, Butyl benzyl phthalate, Cadmium, Carbaryl, Carbofuran, Carbon tetrachloride, Chloramben, Chlordane, Chlorodifluoromethane, Chloroethane, Chrysene, cis-1,2-Dichloroethylene, cis-1,3-Dichloropropene, Dalapon, Di(2-ethylhexyl) adipate, Di-n-butyl phthalate, Dibenz[a,h]anthracene, Dibromomethane, Dicamba, Dichlorodifluoromethane, Dichloromethane (methylene chloride), Dichlorprop, Dieldrin, Diethyl phthalate, Dimethoate, Dimethyl phthalate, Dinoseb, Endrin, Equilin, Estriol, Estrone, Ethinyl estradiol, Ethyl methacrylate, Ethylbenzene, Ethylene dibromide, Fluorene, gamma-Chlordane, Heptachlor, Heptachlor epoxide, Hexachlorobenzene (HCB), Hexachlorobutadiene, Indeno[1,2,3-cd]pyrene, Iodomethane, Isopropylbenzene, Lindane, m-Dichlorobenzene, Mercury (inorganic), Methiocarb, Methomyl, Methoxychlor, Methyl ethyl ketone, Methyl methacrylate, Metolachlor, Metolachlor ethane sulfonic acid, Metolachlor oxanilic acid, Metribuzin, Monochlorobenzene (chlorobenzene), MTBE, n-Butylbenzene, N-nitroso-diethylamine, N-Nitrosodi-N-butylamine, N-Nitrosodi-N-propylamine, N-Nitrosomethylethylamine, n-Propylbenzene, Naphthalene, o-Chlorotoluene, o-Dichlorobenzene, Oxamyl (Vydate), p-Chlorotoluene, p-Dichlorobenzene, p-Isopropyltoluene, Pentachlorophenol, Perfluorobutane sulfonate (PFBS), Perfluoroheptanoic acid (PFHPA), Perfluorohexane sulfonate (PFHXS), Perfluorononanoic acid (PFNA), Perfluorooctane sulfonate (PFOS), Perfluorooctanoic acid (PFOA), Picloram, Prometon, Propachlor, Pyrene, Quinclorac, RDX (Hexahydro-1,3,5-trinitro-1,3,5-triazine), sec-Butylbenzene, Silver, Styrene, Terbufos sulfone, tert-Butylbenzene, Testosterone, Tetrachloroethylene (perchloroethylene), Thallium, Toluene, Toxaphene, trans-1,2-Dichloroethylene, trans-1,3-Dichloropropene, trans-Nonachlor, Trichloroethylene, Trichlorofluoromethane, Trifluralin, Vinyl acetate, Vinyl chloride