The Power of Information

National Drinking Water Database


City of Fresno Water Division - Fresno, CA


Serves 390,350 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.
19 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.
8 chemicals
0.5
Pollutants FoundThe total number of contaminants detected since 2004, according to data provided by the state water agency.
34 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.
129,676 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*
Ethylene dibromide (EDB)Ethylene dibromide is a a pollutant from petroleum refineries that was formerly used as gasoline additive and a pesticide suspended from use by EPA in 1984.<0.01 ppb
0.14 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
Yes
0.05 ppb
ManganeseManganese is a naturally occurring element released from mineral deposits as well as industrial use.10.83 ppb
350 ppb
Yes
50 ppb
Yes
50 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.5 ppm
10.9 ppm
Yes
10 ppm
Yes
10 ppm
Combined Uranium (pCi/L)Uranium is a radioactive element commonly found in most rocks; processed ore is used for power generation and weapons manufacture.6.62 pCi/L
21.5 pCi/L
YesYes
15 pCi/L
AluminumAluminum is a metal released from metal refineries and mining operations.17.96 ppb
940 ppb
Yes
200 ppb
Yes
200 ppb
1,2-Dibromo-3-chloropropane (DBCP)1,2-Dibromo-3-chloropropane is a persistent pesticide and groundwater contaminant associated with male sterility and severe reproductive toxicity; historically used as a soil fumigant on bananas and pineapples; banned by EPA in early 1980s.0.03 ppb
0.29 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
Yes
0.2 ppb
TrichloroethyleneTrichloroethylene is used to remove grease from fabricated metal parts and in the production of some textiles; this pollutant comes from metal degreasing sites, metal finishing and rubber processing industries.0.3 ppb
5.2 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
Yes
5 ppb
Alpha particle activityAlpha particles are a form of radiation released from mining waste pollutants and natural sources.2.89 pCi/L
18.25 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
Yes
15 pCi/L
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.0.04 ppb
3.5 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
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.1.48 ppb
4.2 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
10 ppb
1,2,3-Trichloropropane1,2,3-Trichloropropane is an industrial solvent, degreasing agent, and paint and varnish remover.<0.01 ppb
0.16 ppb
Yes
<0.01 ppb
Legal at any levelThis is the Federal Limit. State Limits may be lower.
Radium-228Radium-228 is a radioactive element usually found around uranium deposits.0.22 pCi/L
1.56 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
BromodichloromethaneBromodichloromethane 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.0.01 ppb
1.43 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
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.0.01 ppb
1.5 ppb
Yes
0.4 ppb
No
80 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.0.15 ppb
9.6 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
BromateBromate is a carcinogenic disinfection byproduct of ozonation formed when source waters contain high levels of natural bromide; it can also form following water treatment with chlorine dioxide or hypochlorite.0.2 ppb
10 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
TetrachloroethyleneTetrachloroethylene (perc) is a common soil and groundwater contaminant used in dry cleaning and as a solvent in automotive and metalworking factories and other industries.<0.01 ppb
0.26 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
5 ppb
Benzo[a]pyreneBenzo[a]pyrene is a polycyclic aromatic hydrocarbon that contaminates drinking water from leaching coal tar coatings on water distribution pipes and storage liners; it is also a product of combustion.<0.01 ppb
0.01 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
0.2 ppb
Radium-226Radium-226 is a radioactive element usually found around uranium deposits.0.21 pCi/L
1.92 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
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*
DichlorodifluoromethaneDichlorodifluoromethane (Freon 12) is a chlorofluorocarbon refrigerant and aerosol spray propellant; it was banned under the Montreal Protocol as of 2000 because of its ozone-depleting properties.0.42 ppb
6.79 ppb
No
1000 ppb
Legal at any levelThis is the Federal Limit. State Limits may be lower.
Total trihalomethanes (TTHMs)Total trihalomethanes constitute the sum of four disinfection byproducts: chloroform, bromodichloromethane, dibromochloromethane, and bromoform.0.14 ppb
7.3 ppb
No
9.8 ppb
No
80 ppb
ChloroformChloroform 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.0.05 ppb
5 ppb
No
5.7 ppb
No
80 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.26.87 ppb
410 ppb
No
700 ppb
No
2000 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.1.57 ppb
37.5 ppb
No
300 ppb
No
1000 ppb
Chromium (total)Chromium is a metal that pollutes drinking water due to discharge from steel and pulp mills and erosion of natural deposits.0.05 ppb
2 ppb
No
100 ppb
No
100 ppb
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.<0.01 ppb
0.3 ppb
No
30 ppb
Legal at any levelThis is the Federal Limit. State Limits may be lower.
2,2-Dichloropropane2,2-Dichloropropane is an intermediate used in chemical manufacturing.0.28 ppb
94 ppb
NoLegal at any levelThis is the Federal Limit. State Limits may be lower.
BromochloromethaneBromochloromethane is a tap water disinfection byproduct; it is also used as an intermediate in chemical manufacturing and a fire extinguishing agent.<0.01 ppb
0.06 ppb
No
50 ppb
Legal at any levelThis is the Federal Limit. State Limits may be lower.
sec-Butylbenzenesec-Butylbenzene is a pollutant from the incomplete combustion of fossil fuels and various industrial processes.<0.01 ppb
0.08 ppb
NoLegal at any levelThis is the Federal Limit. State Limits may be lower.
1,3-Dichloropropene1,3-Dichloropropene is used in chemical synthesis, in agriculture as a soil fumigant and nematocide, and as a corrosion inhibition agent.<0.01 ppb
0.13 ppb
No
0.2 ppb
Legal at any levelThis is the Federal Limit. State Limits may be lower.
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
0.18 ppb
No
150 ppb
No
1000 ppb
cis-1,3-Dichloropropenecis-1,3-Dichloropene is used in chemical synthesis, and in agriculture as a soil fumigant and nematocide.<0.01 ppb
0.13 ppb
NoLegal at any levelThis is the Federal Limit. State Limits may be lower.
AcetoneAcetone is a ubiquitous industrial solvent and chemical intermediate used in manufacture of plastic, fibers, cosmetics, photographic film and many other kinds of consumer goods.0.44 ppb
18 ppb
No
6000 ppb
Legal at any levelThis is the Federal Limit. State Limits may be lower.
Nitrate & nitriteNitrate and nitrite enter water from fertilizer runoff, leaching from septic tanks, and erosion of natural deposits.4.4 ppm
4.4 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 - 111 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, 1,2,3-Trichlorobenzene, 1,2,4-Trichlorobenzene, 1,2,4-Trimethylbenzene, 1,2-Dichloroethane, 1,2-Dichloropropane, 1,3,5-Trimethylbenzene, 1,3-Dichloropropane, 2,4,5-t, 2,4,5-TP (Silvex), 2,4-d, 3-Hydroxycarbofuran, Alachlor (Lasso), Aldicarb, Aldicarb sulfone, Aldicarb sulfoxide, Aldrin, Antimony (total), Atrazine, Bentazon (Basagran), Benzene, Beryllium (total), Bromacil, Bromobenzene, Bromomethane, Butachlor, Cadmium (total), Carbaryl, Carbofuran, Carbon tetrachloride, Chlordane, Chloroethane, Chlorothalonil (Bravo), cis-1,2-Dichloroethylene, Cyanide, Dalapon, Di(2-Ethylhexyl) adipate, Di(2-ethylhexyl) phthalate, Diazinon (Spectracide), Dibromomethane, Dicamba, Dichloromethane (methylene chloride), Dieldrin, Dimethoate, Dinoseb, Diquat, Endothall, Endrin, Ethyl-t-butyl ether (ETBE), Ethylbenzene, Glyphosate, Heptachlor, Heptachlor epoxide, Hexachlorobenzene (HCB), Hexachlorobutadiene, Hexachlorocyclopentadiene, Hexachloroethane, Isopropylbenzene, Lindane, m- & p- Xylene, m-Dichlorobenzene, Mercury (total inorganic), Methomyl, Methoxychlor, Methyl ethyl ketone, Methyl isobutyl ketone, Metolachlor, Metribuzin, Molinate (Ordram), Monochlorobenzene (Chlorobenzene), Mtbe, n-Butylbenzene, n-Propylbenzene, Naphthalene, Nitrite, Nitrobenzene, o-Chlorotoluene, o-Dichlorobenzene, o-Xylene, Oxamyl (Vydate), p-Chlorotoluene, p-Dichlorobenzene, p-Isopropyltoluene, Pentachlorophenol, Perchlorate, Picloram, Prometryn, Propachlor, Selenium (total), Silver (total), Simazine, Styrene, Tert-Amyl-Methyl Ether, tert-Butylbenzene, Thallium (total), Thiobencarb (Bolero), Total polychlorinated biphenyls (PCBs), Toxaphene, trans-1,2-Dichloroethylene, trans-1,3-Dichloropropene, Trichlorofluoromethane, Trichlorotrifluoroethane, Trifluralin, Vinyl chloride, Xylenes (total)

Pollution Summary

34Total Contaminants Detected (2004 - 2009)

Barium (total), Chromium (total), Copper, Nitrate & nitrite, Chloromethane, Dichlorodifluoromethane, cis-1,3-Dichloropropene, Acetone, 1,3-Dichloropropene, 2,2-Dichloropropane, sec-Butylbenzene, Bromochloromethane, Chloroform, Total trihalomethanes (TTHMs), Toluene, Aluminum, Arsenic (total), Bromate, Lead (total), Manganese, Nitrate, Benzo[a]pyrene, 1,2,3-Trichloropropane, 1,2-Dibromo-3-chloropropane (DBCP), Bromoform, Bromodichloromethane, Dibromochloromethane, Ethylene dibromide (EDB), Trichloroethylene, Tetrachloroethylene, Radium-226, Radium-228, Alpha particle activity, Combined Uranium (pCi/L)

6Agricultural Pollutants
(pesticides, fertilizer, factory farms)

Nitrate & nitrite, 1,3-Dichloropropene, Arsenic (total), Nitrate, 1,2-Dibromo-3-chloropropane (DBCP), Ethylene dibromide (EDB)

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

Copper, Nitrate & nitrite, Acetone, sec-Butylbenzene, Arsenic (total), Lead (total), Nitrate, Benzo[a]pyrene, Tetrachloroethylene

24Industrial Pollutants

Barium (total), Chromium (total), Nitrate & nitrite, Chloromethane, Dichlorodifluoromethane, cis-1,3-Dichloropropene, Acetone, 2,2-Dichloropropane, sec-Butylbenzene, Bromochloromethane, Toluene, Aluminum, Arsenic (total), Lead (total), Manganese, Nitrate, 1,2,3-Trichloropropane, Ethylene dibromide (EDB), Trichloroethylene, Tetrachloroethylene, Radium-226, Radium-228, Alpha particle activity, Combined Uranium (pCi/L)

9Water Treatment and Distribution Byproducts
(pipes and fixtures, treatment chemicals and byproducts)

Total trihalomethanes (TTHMs), Chloroform, Bromodichloromethane, Dibromochloromethane, Bromoform, Chloromethane, Bromate, Bromochloromethane, Benzo[a]pyrene

14Naturally 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, Radium-226, Alpha particle activity, Combined Uranium (pCi/L), Chromium (total), Aluminum, Chloromethane

10Unregulated Contaminants
EPA has not established a maximum legal limit in tapwater for these contaminants

Chloromethane, Dichlorodifluoromethane, cis-1,3-Dichloropropene, Acetone, 1,3-Dichloropropene, 2,2-Dichloropropane, sec-Butylbenzene, Bromochloromethane, Lead (total), 1,2,3-Trichloropropane

EPA Violation Summary

No violations were reported for this system since 2004.

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.