The Power of Information

National Drinking Water Database


Olivehurst Public U.D. - Olivehurst, CA


Serves 9,238 people - Test data available: 2004-2009

This drinking water quality report shows results of tests conducted by the water utility and provided to the Environmental Working Group (EWG) by the California Department of Public Health. It is part of EWG's national database that includes 47,667 drinking water utilities and 20 million test results. Water utilities nationwide detected more than 300 pollutants between 2004 and 2009. More than half of these chemicals are unregulated, legal in any amount. Despite this widespread contamination, the federal government invests few resources to protecting rivers, reservoirs, and groundwater from pollution in the first place. The information below summarizes test results for this utility and lists potential health concerns.

 
This Drinking Water System
National Average
Exceed Health GuidelinesTests showing chemicals at concentrations above health guidelines established by federal and state health agencies. These guidelines are typically set at a levels that pose no significant health risk.
7 chemicals
4
Health Standard ExceedencesChemicals detected at concentrations above the legal limit, the Maximum Contaminant Level (MCLs) established by the U.S. EPA. Most MCLs are based on annual averages, so exceeding the MCL for one test does not necessarily indicate that the system is out of compliance.
1 chemicals
0.5
Pollutants FoundThe total number of contaminants detected since 2004, according to data provided by the state water agency.
28 chemicals
8
Tests ConductedThe total number of number of water quality tests conducted by water utilities and recorded in data provided by the state water agency.
1,737 tests
420

Contaminants Exceeding Health Guidelines

ContaminantAverage/
Maximum
Result
Health Limit
Exceeded
Legal Limit
Exceeded

Testing History

-Tested      -Detected      -Over Health Guidelines      -Over Legal Limit*
ManganeseManganese is a naturally occurring element released from mineral deposits as well as industrial use.29.93 ppb
200 ppb
Yes
50 ppb
Yes
50 ppb
BromoformBromoform is a disinfection byproduct from the trihalomethane (THM) family, and is formed when chlorine, chloramines or other disinfectants react with organic and inorganic matter in water.0.23 ppb
2.4 ppb
Yes
MCLGA non-enforceable health goal that is set at a level at which no known or anticipated adverse effect on the health of persons occurs and which allows an adequate margin of safety. Source: U.S. Environmental Protection Agency.: 0 ppb
No
80 ppb
Alpha particle activityAlpha particles are a form of radiation released from mining waste pollutants and natural sources.0.23 pCi/L
1.8 pCi/L
Yes
MCLGA non-enforceable health goal that is set at a level at which no known or anticipated adverse effect on the health of persons occurs and which allows an adequate margin of safety. Source: U.S. Environmental Protection Agency.: 0 pCi/L
No
15 pCi/L
DibromochloromethaneDibromochloromethane is a disinfection byproduct from the trihalomethane (THM) family, and is formed when chlorine, chloramines or other disinfectants react with organic and inorganic matter in water.0.13 ppb
1.5 ppb
Yes
0.4 ppb
No
80 ppb
Radium-228Radium-228 is a radioactive element usually found around uranium deposits.0.04 pCi/L
0.26 pCi/L
Yes
MCLGA non-enforceable health goal that is set at a level at which no known or anticipated adverse effect on the health of persons occurs and which allows an adequate margin of safety. Source: U.S. Environmental Protection Agency.: 0 pCi/L
No
5 pCi/L
Arsenic (total)Arsenic contaminates drinking water due to mining runoff, erosion of natural deposits, emissions from glass and electronics processing and the use of arsenical compounds as wood preservatives and pesticides.0.2 ppb
1 ppb
Yes
MCLGA non-enforceable health goal that is set at a level at which no known or anticipated adverse effect on the health of persons occurs and which allows an adequate margin of safety. Source: U.S. Environmental Protection Agency.: 0 ppb
No
10 ppb
Lead (total)Lead is a metal that enters water by corrosion of household plumbing systems, discharge of industrial pollution and erosion of natural deposits.3.6 ppb
7.2 ppb
Yes
MCLGA non-enforceable health goal that is set at a level at which no known or anticipated adverse effect on the health of persons occurs and which allows an adequate margin of safety. Source: U.S. Environmental Protection Agency.: 0 ppb
No
NOTE: Each dot in the above graph represents one month.
* Water utilities are noted as exceeding the legal limit if any test is above the maximum contaminant level (MCL). Most MCLs are based on annual averages so exceeding the MCL for one test does not necessarily indicate that the system is out of compliance.

Other Detected Contaminants

ContaminantAverage/
Maximum
Result
Health Limit
Exceeded
Legal Limit
Exceeded

Testing History

-Tested      -Detected      -Over Health Guidelines      -Over Legal Limit*
cis-1,2-Dichloroethylenecis-1,2-Dichloroethylene is a pollutant discharged by various industrial chemical factories from the manufacture of plastic wrap, adhesives and synthetic fiber.0.37 ppb
1.6 ppb
No
70 ppb
No
70 ppb
EthylbenzeneEthylbenzene is a pollutant from petroleum refineries and industrial chemical factories; it is also used to make plastics, and may be present as an impurity in some insecticides.0.6 ppb
4.8 ppb
No
300 ppb
No
700 ppb
Xylenes (total)Xylenes are a group of chemicals produced from petroleum and released as pollutants from chemical, plastics and synthetic fiber industries as well as printing, painting, and laboratory uses.2.27 ppb
16 ppb
No
1800 ppb
No
10000 ppb
CopperCopper is a naturally occuring metal and drinking water contaminant that enters tap water by corrosion of household plumbing systems and erosion of natural deposits.4 ppb
12 ppb
No
300 ppb
No
1000 ppb
Total trihalomethanes (TTHMs)Total trihalomethanes constitute the sum of four disinfection byproducts: chloroform, bromodichloromethane, dibromochloromethane, and bromoform.0.46 ppb
3.9 ppb
No
9.8 ppb
No
80 ppb
m- & p- XyleneXylene is a petroleum-derived solvent used in the printing, rubber, and leather industries, and as a cleaning agent, a thinner for paint, and an ingredient in paints and varnishes.1.36 ppb
13 ppb
No
10000 ppb
No
10000 ppb
o-Xyleneo-Xylene is a petroleum-derived solvent used in the printing, rubber, and leather industries; it is also used as a cleaning agent, a thinner for paint, and an ingredient in paints and varnishes.0.37 ppb
3.5 ppb
No
10000 ppb
No
10000 ppb
1,2,4-Trimethylbenzene1,2,4-Trimethylbenzene is a chemical intermediate, industrial solvent, and component of gasoline, coal tar and petroleum products.0.31 ppb
2.6 ppb
NoLegal at any levelThis is the Federal Limit. State Limits may be lower.
AluminumAluminum is a metal released from metal refineries and mining operations.6.76 ppb
28 ppb
No
200 ppb
No
200 ppb
Barium (total)Barium is a mineral that enters drinking water through drilling and mining waste runoff, discharges from chemical industries and erosion of natural deposits.28.6 ppb
73 ppb
No
700 ppb
No
2000 ppb
TolueneToluene is a pollutant from petroleum refineries and a chemical used in plastics manufacturing as well as the pharmaceutical, paint and furniture industries.0.01 ppb
0.21 ppb
No
150 ppb
No
1000 ppb
NitrateNitrate enters drinking water sources from fertilizer runoff, leaching septic tanks, and erosion of natural deposits; it is also emitted by chemical, petrochemical and metal-finishing industries.0.05 ppm
0.68 ppm
No
10 ppm
No
10 ppm
ChloromethaneChloromethane is a naturally occuring chemical that forms during combustion of plant material; it may be released from the manufacture of silicone, rubber and pesticides, and also forms as a byproduct of water disinfection.0.49 ppb
5.4 ppb
No
30 ppb
Legal at any levelThis is the Federal Limit. State Limits may be lower.
n-Propylbenzenen-Propylbenzene is a solvent used in textile dyeing and printing, a pollutant from asphalt and landfill leachate, and a constituent of petroleum and coal.0.09 ppb
1 ppb
NoLegal at any levelThis is the Federal Limit. State Limits may be lower.
BromomethaneBromomethane is a pesticide used for soil, grain, indoor air and other applications, and a solvent used to extract vegetable and seed oils.0.85 ppb
9.3 ppb
No
10 ppb
Legal at any levelThis is the Federal Limit. State Limits may be lower.
1,3,5-Trimethylbenzene1,3,5-Trimethylbenzene is a gasoline hydrocarbon and industrial chemical used in building materials, furnishings and chemical manufacturing.0.12 ppb
1.2 ppb
No
10000 ppb
Legal at any levelThis is the Federal Limit. State Limits may be lower.
PerchloratePerchlorate is a synthetic oxygen additive in solid fuel propellant for rockets, missiles, and fireworks, and is primarily used by the military and the space industry; it may occur naturally in certain imported agricultural fertilizers.0.31 ppb
2.78 ppb
No
5 ppb
Legal at any levelThis is the Federal Limit. State Limits may be lower.
Chromium (total)Chromium is a metal that pollutes drinking water due to discharge from steel and pulp mills and erosion of natural deposits.1.1 ppb
5.5 ppb
No
100 ppb
No
100 ppb
Total haloacetic acids (HAAs)Total haloacetic acids refers to the sum of the concentrations of five related disinfection byproducts in a water sample: dichloroacetic acid, trichloroacetic acid, monochloroacetic acid, monobromoacetic acid and dibromoacetic acid.0.16 ppb
0.62 ppb
No
0.7 ppb
No
60 ppb
Dibromoacetic acidDibromoacetic acid is a disinfection byproduct regulated by EPA as one of five haloacetic acids that are formed when chlorine, chloramines or other disinfectants react with organic and inorganic matter in water.0.16 ppb
0.62 ppb
NoNo
60 ppb
Nitrate & nitriteNitrate and nitrite enter water from fertilizer runoff, leaching from septic tanks, and erosion of natural deposits.0.23 ppm
0.7 ppm
No
10 ppm
No
10 ppm
NOTE: Each dot in the above graph represents one month.
* Water utilities are noted as exceeding the legal limit if any test is above the maximum contaminant level (MCL). Most MCLs are based on annual averages so exceeding the MCL for one test does not necessarily indicate that the system is out of compliance.

Contaminants Not Detected - 78 chemicals

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 Dibromo-3-chloropropane (DBCP), 1,2,3-Trichlorobenzene, 1,2,3-Trichloropropane, 1,2,4-Trichlorobenzene, 1,2-Dichloroethane, 1,2-Dichloropropane, 1,3,5-Trichlorobenzene, 1,3-Dichloropropane, 1,3-Dichloropropene, 2,2-Dichloropropane, 2-Chloroethylvinyl ether, Antimony (total), Benzene, Beryllium (total), bis(2-chloroethyl) ether, Bromobenzene, Bromochloromethane, Bromodichloromethane, Cadmium (total), Carbon tetrachloride, Chloroethane, Chloroform, cis-1,3-Dichloropropene, Combined Uranium (pCi/L), Dibromomethane, Dichloroacetic acid, Dichlorodifluoromethane, Dichloromethane (methylene chloride), Ethyl-t-butyl ether (ETBE), Ethylene dibromide (EDB), Glyphosate, Hexachlorobutadiene, Hydrogen sulfide, Isopropyl ether, Isopropylbenzene, m-Dichlorobenzene, m-Xylene, Mercury (total inorganic), Methyl ethyl ketone, Methyl isobutyl ketone, Monobromoacetic acid, Monochloroacetic acid, Monochlorobenzene (Chlorobenzene), Mtbe, n-Butylbenzene, Naphthalene, Nitrite, Nitrobenzene, o-Chlorotoluene, o-Dichlorobenzene, p-Chlorotoluene, p-Dichlorobenzene, p-Isopropyltoluene, p-Xylene, sec-Butylbenzene, Selenium (total), Silver (total), Styrene, Tert-Amyl-Methyl Ether, Tert-Butyl Alcohol, tert-Butylbenzene, Tetrachloroethylene, Thallium (total), trans-1,2-Dichloroethylene, trans-1,3-Dichloropropene, Trichloroacetic acid, Trichloroethylene, Trichlorofluoromethane, Trichlorotrifluoroethane, Vanadium, Vinyl chloride

Pollution Summary

28Total Contaminants Detected (2004 - 2009)

Aluminum, Arsenic (total), Barium (total), Chromium (total), Copper, Lead (total), Manganese, Nitrate & nitrite, Nitrate, Chloromethane, Bromomethane, cis-1,2-Dichloroethylene, 1,2,4-Trimethylbenzene, 1,3,5-Trimethylbenzene, Dibromoacetic acid, Total haloacetic acids (HAAs), Bromoform, Dibromochloromethane, Total trihalomethanes (TTHMs), Xylenes (total), Toluene, Ethylbenzene, o-Xylene, n-Propylbenzene, m- & p- Xylene, Radium-228, Alpha particle activity, Perchlorate

6Agricultural Pollutants
(pesticides, fertilizer, factory farms)

Arsenic (total), Nitrate & nitrite, Nitrate, Bromomethane, Ethylbenzene, Perchlorate

9Sprawl and Urban Pollutants
(road runoff, lawn pesticides, human waste)

Arsenic (total), Copper, Lead (total), Nitrate & nitrite, Nitrate, Xylenes (total), o-Xylene, n-Propylbenzene, m- & p- Xylene

21Industrial Pollutants

Aluminum, Arsenic (total), Barium (total), Chromium (total), Lead (total), Manganese, Nitrate & nitrite, Nitrate, Chloromethane, cis-1,2-Dichloroethylene, 1,2,4-Trimethylbenzene, 1,3,5-Trimethylbenzene, Xylenes (total), Toluene, Ethylbenzene, o-Xylene, n-Propylbenzene, m- & p- Xylene, Radium-228, Alpha particle activity, Perchlorate

6Water Treatment and Distribution Byproducts
(pipes and fixtures, treatment chemicals and byproducts)

Total trihalomethanes (TTHMs), Total haloacetic acids (HAAs), Dibromochloromethane, Bromoform, Dibromoacetic acid, Chloromethane

12Naturally Occurring
(naturally present but increased for lands denuded by sprawl, agriculture, or industrial development)

Nitrate, Copper, Nitrate & nitrite, Barium (total), Lead (total), Arsenic (total), Manganese, Radium-228, Alpha particle activity, Chromium (total), Aluminum, Chloromethane

7Unregulated Contaminants
EPA has not established a maximum legal limit in tapwater for these contaminants

Lead (total), Chloromethane, Bromomethane, 1,2,4-Trimethylbenzene, 1,3,5-Trimethylbenzene, n-Propylbenzene, Perchlorate

EPA Violation Summary

Violation CategoryNumber of Violations
MCL and Treatment
(click see violations)
2
Monitoring
(click see violations)
5

Information on violations is drawn directly from EPA's national violations database in the Agency's Safe Drinking Water Information System. Analyses by others have raised questions about the quality of the information in EPA's database. For the purposes of this investigation, EWG is not showing below or including in our analyses, those violations for individual water suppliers that occurred on days for which the total number of violations assigned by EPA to that water supplier was greater than 20. This criteria was based on common characteristics of incorrect violations data as identified by water utilities, from a review of EPA's violations data by several hundred utilities prior to the release of EWG's investigation.