Know Your Environment. Protect Your Health.

Chloroform

Avon Water Company

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. Read More.

In addition to tap water disinfection, chloroform pollution in the environment also comes from industrial discharges from pulp and paper mills, and from urban wastewater effluent. Human studies show that chloroform damages the kidneys, liver and central nervous system. In animals, chloroform causes infertility, birth defects and cancer.

Click here to read more about disinfection byproducts.

 

126

Samples

0

Samples exceeding legal limit (MCL)

80

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20180.605 ppb2615ND - 1.60 ppb
20190.554 ppb2411ND - 2.40 ppb
20200.789 ppb1811ND - 2.50 ppb
20211.29 ppb1814ND - 3.60 ppb
20220.985 ppb2314ND - 3.60 ppb
20232.04 ppb1715ND - 4.80 ppb

ppb = parts per billion

State, National, and Health Guidelines for Drinking Water

EWG Health Guideline: 0.4 ppb

The EWG Health Guideline of 0.4 ppb for chloroform was based on the California Office of Environmental Health Hazard Assessment's public health goal, the level of a drinking water contaminant that does not pose a significant health risk. This health guideline protects against cancer and harm to fetal growth and development.

ppb = parts per billion

All test results

Date Lab ID Result
2018-01-24D8A1669-01VOC0.700 ppb
2018-01-24D8A1669-02VOC0.800 ppb
2018-01-24D8A1669-03VOC1.000 ppb
2018-01-24D8A1669-04VOC0.500 ppb
2018-03-05D8C0238-02VOCND
2018-03-05D8C0238-03VOCND
2018-03-05D8C0238-04VOCND
2018-03-05D8C0238-05VOC0.800 ppb
2018-03-05D8C0238-06VOCND
2018-03-05D8C0238-07VOCND
2018-03-05D8C0238-08VOCND
2018-04-25D8D2151-08VOCND
2018-04-25D8D2151-09VOC1.10 ppb
2018-04-25D8D2151-10VOC0.900 ppb
2018-04-25D8D2151-11VOC1.20 ppb
2018-04-25D8D2151-07VOCND
2018-07-26CA98743ND
2018-07-26CA987441.40 ppb
2018-07-26CA987450.540 ppb
2018-07-26CA987461.40 ppb
2018-07-26CA98747ND
2018-10-09DBP 2005086641.30 ppb
2018-10-09DBP 2005086651.30 ppb
2018-10-09DBP 2005086761.60 ppb
2018-10-09DBP 2005086781.20 ppb
2018-10-09VOC1 200508699ND
2019-01-08DBP 2005181310.700 ppb
2019-01-08DBP 200518132ND
2019-01-08DBP 2005181330.500 ppb
2019-01-08DBP 200518135ND
2019-01-29VOC1 200519992ND
2019-01-29VOC1 200519993ND
2019-01-29VOC1 200519991ND
2019-01-29VOC1 200519996ND
2019-01-29VOC1 200519994ND
2019-01-29VOC1 200519995ND
2019-04-11DBP 2005282670.800 ppb
2019-04-11DBP 2005282681.40 ppb
2019-04-11DBP 2005282691.10 ppb
2019-04-11DBP 2005282701.10 ppb
2019-04-16VOC1 200528742ND
2019-07-02DBP 200538992ND
2019-07-02DBP 2005389931.50 ppb
2019-07-02DBP 200538995ND
2019-07-02DBP 2005389961.20 ppb
2019-08-13VOC1 200544842ND
2019-10-03DBP 200551429ND
2019-10-03DBP 2005514302.40 ppb
2019-10-03DBP 2005514311.20 ppb
2019-10-03DBP 2005514321.40 ppb
2020-01-09DBP 200562755ND
2020-01-09DBP 200562756ND
2020-01-09DBP 2005627570.600 ppb
2020-01-09DBP 2005627580.600 ppb
2020-04-16DBP 200572926ND
2020-04-16DBP 200572927ND
2020-04-16DBP 2005729280.500 ppb
2020-04-16DBP 2005729291.60 ppb
2020-07-20DBP 2005834130.600 ppb
2020-07-20DBP 2005834141.70 ppb
2020-07-20DBP 2005834150.700 ppb
2020-07-20DBP 2005834162.50 ppb
2020-08-10VOC1 200585683ND
2020-08-10VOC1 200586606ND
2020-10-21DBP 200595044ND
2020-10-21DBP 2005950451.000 ppb
2020-10-21DBP 2005950462.20 ppb
2020-10-21DBP 2005950472.20 ppb
2021-01-07DBP 2006034021.000 ppb
2021-01-07DBP 2006034041.10 ppb
2021-01-07DBP 2006034052.10 ppb
2021-01-07DBP 2006034062.30 ppb
2021-04-15DBP 2006136520.600 ppb
2021-04-15DBP 2006136531.000 ppb
2021-04-15DBP 2006136541.30 ppb
2021-04-15DBP 2006136551.30 ppb
2021-06-01VOC1 200619066ND
2021-06-08VOC1 200620139ND
2021-07-01DBP 200623334ND
2021-07-01DBP 2006233350.900 ppb
2021-07-01DBP 2006233363.60 ppb
2021-07-01DBP 2006233383.60 ppb
2021-10-12H300079406 3000794101.30 ppb
2021-10-12H300079407 3000794121.60 ppb
2021-10-12H300079408 3000794141.50 ppb
2021-10-12H300079409 300079416ND
2022-01-14CK177790.520 ppb
2022-01-14CK177800.830 ppb
2022-01-14CK177811.40 ppb
2022-01-17CK17776ND
2022-01-17CK17777ND
2022-01-17CK17778ND
2022-01-18CK17774ND
2022-03-24CK96357ND
2022-03-28CK96358ND
2022-03-28CK96359ND
2022-04-15CL111661.30 ppb
2022-04-15CL111671.000 ppb
2022-04-15CL111681.30 ppb
2022-04-15CL111692.50 ppb
2022-07-08CL75309ND
2022-07-08CL753103.60 ppb
2022-07-08CL753111.50 ppb
2022-07-08CL753121.50 ppb
2022-08-18CM11956ND
2022-10-21CM692481.50 ppb
2022-10-21CM692491.30 ppb
2022-10-21CM692502.30 ppb
2022-10-21CM692512.10 ppb
2023-01-11CN219640.760 ppb
2023-01-12CN241881.30 ppb
2023-01-12CN241892.30 ppb
2023-01-12CN241902.00 ppb
2023-03-03CN54373ND
2023-04-14CN858621.20 ppb
2023-04-14CN858631.10 ppb
2023-04-14CN858641.40 ppb
2023-04-14CN858651.60 ppb
2023-07-13CO53041ND
2023-07-13CO530421.60 ppb
2023-07-13CO530432.90 ppb
2023-07-25CO588553.20 ppb
2023-10-04CP178071.30 ppb
2023-10-04CP178084.80 ppb
2023-10-04CP178094.50 ppb
2023-10-04CP178104.70 ppb