The Power of Information

National Drinking Water Database


Clark Public Utilities - Vancouver, WA


Serves 79,948 people - Test data available: 2004-2006

This drinking water quality report shows results of tests conducted by the water utility and provided to the Environmental Working Group (EWG) by the Washington State Department of 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.

The Washington State Department of Health did not respond to requests for more recent test data. Contact your water utility for the latest water quality report.

 
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.
10 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.
23 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.
8,511 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.30.72 ppb
278.33 ppb
Yes
50 ppb
Yes
50 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.0.81 ppb
2.33 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.0.28 ppb
2.6 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
5 ppb
RadonRadon is a radioactive breakdown product of radium and uranium in soil, rock and water; it is often present in groundwater.354.36 pCi/L
475 pCi/L
Yes
1.5 pCi/L
Legal at any levelThis is the Federal Limit. State Limits may be lower.
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.0.06 ppb
0.73 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.0.05 ppb
0.54 ppb
Yes
0.4 ppb
No
80 ppb
Dichloromethane (methylene chloride)Dichloromethane is a widely-used paint remover, solvent and metal degreasing agent; it is discharged into the environment from the manufacture of chemicals, textiles, electronics, metals and plastics, pharmaceuticals and pesticides.<0.01 ppb
0.18 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
Lead (total)Lead is a metal that enters water by corrosion of household plumbing systems, discharge of industrial pollution and erosion of natural deposits.0.03 ppb
0.5 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
Dichloroacetic acidDichloroacetic 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.0.05 ppb
0.47 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
60 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.0.14 ppb
0.83 ppb
Yes
0.7 ppb
No
60 ppb
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*
1,1,1-Trichloroethane1,1,1-Trichloroethane is an industrial cleaning solvent that contaminates drinking water sources due to releases from metal degreasing sites and chemicals factories.0.34 ppb
1.4 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.14 ppb
96 ppb
No
700 ppb
No
2000 ppb
Total trihalomethanes (TTHMs)Total trihalomethanes constitute the sum of four disinfection byproducts: chloroform, bromodichloromethane, dibromochloromethane, and bromoform.0.22 ppb
2.36 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.0.09 ppb
1.24 ppb
No
5.7 ppb
No
80 ppb
Nitrate & nitriteNitrate and nitrite enter water from fertilizer runoff, leaching from septic tanks, and erosion of natural deposits.0.33 ppm
1.75 ppm
No
10 ppm
No
10 ppm
1,1-DichloroethyleneIndustrial chemical pollutant from manufacture of adhesives, synthetic fibers, refrigerants and plastic wraps.0.09 ppb
0.8 ppb
No
7 ppb
No
7 ppb
Chromium (total)Chromium is a metal that pollutes drinking water due to discharge from steel and pulp mills and erosion of natural deposits.0.36 ppb
2 ppb
No
100 ppb
No
100 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.26.04 ppb
192 ppb
No
300 ppb
No
1000 ppb
CyanideCyanide is a chemical used in mining and steel/metal, plastic, and pesticide manufacturing; it is applied to roads as road salts, and small quantities occur naturally in some plants.2.5 ppb
30 ppb
No
80 ppb
No
200 ppb
BromomethaneBromomethane is a pesticide used for soil, grain, indoor air and other applications, and a solvent used to extract vegetable and seed oils.0.01 ppb
0.57 ppb
No
10 ppb
Legal at any levelThis is the Federal Limit. State Limits may be lower.
Trichloroacetic acidTrichloroacetic 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.0.06 ppb
0.37 ppb
No
20 ppb
No
60 ppb
Strontium-89Strontium-89 is a short-lived radioactive isotope of strontium used as a radiopharmaceutical for the treatment of metastatic bone cancer.250 pCi/L
250 pCi/L
NoLegal at any levelThis is the Federal Limit. State Limits may be lower.
Iodine-131Iodine-131 is a radioactive tracer used in medical applications, and present in the environment due to radioactive fallout from nuclear power station accidents and nuclear weapons testing.545000 ppb
545000 ppb
NoLegal at any levelThis is the Federal Limit. State Limits may be lower.
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 - 153 chemicals

1,1,1,2-Tetrachloroethane, 1,1,2,2-Tetrachloroethane, 1,1,2-Trichloroethane, 1,1-Dichloroethane, 1,1-Dichloropropene, 1,2 Dibromo-3-chloropropane (DBCP), 1,2,3-Trichlorobenzene, 1,2,3-Trichloropropane, 1,2,4-Trichlorobenzene, 1,2,4-Trimethylbenzene, 1,2-Dichloroethane, 1,2-Dichloropropane, 1,3,5-Trimethylbenzene, 1,3-Dichloropropane, 1,3-Dichloropropene, 2,2-Dichloropropane, 2,4,5-t, 2,4,5-TP (Silvex), 2,4-d, 2,4-db, 3-Hydroxycarbofuran, 4,4-dde, 4-Nitrophenol, 5-Hydroxydicamba, Acenaphthene, Acenaphthylene, Acifluorfen (Blazer), Alachlor (Lasso), Aldicarb, Aldicarb sulfone, Aldicarb sulfoxide, Aldrin, Alpha particle activity, Aluminum, Anthracene, Antimony (total), Aroclor 1016, Aroclor 1221, Aroclor 1232, Aroclor 1242, Aroclor 1248, Aroclor 1254, Aroclor 1260, Atrazine, Baygon (Propoxur), Bentazon (Basagran), Benzene, Benzo[a]anthracene, Benzo[a]pyrene, Benzo[b]fluoranthene, Benzo[g,h,i]perylene, Benzo[k]fluoranthene, Beryllium (total), Bromacil, Bromobenzene, Bromochloromethane, Bromoform, Butachlor, Butyl Benzylphthalate, Cadmium (total), Carbaryl, Carbofuran, Carbon tetrachloride, Chloramben, Chlordane, Chloroethane, Chloromethane, Chrysene, cis-1,2-Dichloroethylene, cis-1,3-Dichloropropene, Cyanazine (Bladex), Dalapon, DCPA di acid degradate, Di(2-Ethylhexyl) adipate, Di(2-ethylhexyl) phthalate, Di-n-butylphthalate, Diazinon (Spectracide), Dibenz[a,h]anthracene, Dibromoacetic acid, Dibromomethane, Dicamba, Dichlorodifluoromethane, Dichlorprop, Dieldrin, Diethylphthalate, Dimethylphthalate, Dinoseb, Disulfoton, Endosulfan I, Endrin, EPTC (Eptam), Ethylbenzene, Ethylene dibromide (EDB), Fluoranthene, Fluorene, Heptachlor, Heptachlor epoxide, Hexachlorobenzene (HCB), Hexachlorobutadiene, Hexachlorocyclopentadiene, Indeno[1,2,3-cd]pyrene, Isopropylbenzene, Lindane, m- & p- Xylene, m-Dichlorobenzene, Malathion, Mercury (total inorganic), Methiocarb, Methomyl, Methoxychlor, Metolachlor, Metribuzin, Monobromoacetic acid, Monochloroacetic acid, Monochlorobenzene (Chlorobenzene), n-Butylbenzene, n-Propylbenzene, Naphthalene, Nitrite, o-Chlorotoluene, o-Dichlorobenzene, o-Xylene, Oxamyl (Vydate), p,p'-DDT, p-Chlorotoluene, p-Dichlorobenzene, p-Isopropyltoluene, para-para DDD, Parathion (ethyl), Pentachlorophenol, Phenanthrene, Picloram, Prometon, Propachlor, Pyrene, sec-Butylbenzene, Selenium (total), Silver (total), Simazine, Styrene, Terbacil, tert-Butylbenzene, Thallium (total), Toluene, Total polychlorinated biphenyls (PCBs), Toxaphene, trans-1,2-Dichloroethylene, trans-1,3-Dichloropropene, Trichloroethylene, Trichlorofluoromethane, Trifluralin, Vinyl chloride, Xylenes (total)

Pollution Summary

23Total Contaminants Detected (2004 - 2006)

Arsenic (total), Barium (total), Chromium (total), Copper, Cyanide, Lead (total), Manganese, Nitrate & nitrite, Bromomethane, Dichloroacetic acid, Trichloroacetic acid, Total haloacetic acids (HAAs), Chloroform, Bromodichloromethane, Dibromochloromethane, Total trihalomethanes (TTHMs), Dichloromethane (methylene chloride), 1,1-Dichloroethylene, 1,1,1-Trichloroethane, Tetrachloroethylene, Radon, Strontium-89, Iodine-131

4Agricultural Pollutants
(pesticides, fertilizer, factory farms)

Arsenic (total), Cyanide, Nitrate & nitrite, Bromomethane

8Sprawl and Urban Pollutants
(road runoff, lawn pesticides, human waste)

Copper, Nitrate & nitrite, Lead (total), Arsenic (total), Tetrachloroethylene, Dichloromethane (methylene chloride), Cyanide, Strontium-89

12Industrial Pollutants

Arsenic (total), Barium (total), Chromium (total), Cyanide, Lead (total), Manganese, Nitrate & nitrite, Dichloromethane (methylene chloride), 1,1-Dichloroethylene, 1,1,1-Trichloroethane, Tetrachloroethylene, Iodine-131

7Water Treatment and Distribution Byproducts
(pipes and fixtures, treatment chemicals and byproducts)

Total trihalomethanes (TTHMs), Total haloacetic acids (HAAs), Chloroform, Bromodichloromethane, Dibromochloromethane, Dichloroacetic acid, Trichloroacetic acid

10Naturally Occurring
(naturally present but increased for lands denuded by sprawl, agriculture, or industrial development)

Copper, Nitrate & nitrite, Barium (total), Lead (total), Arsenic (total), Manganese, Chromium (total), Radon, Cyanide, Iodine-131

5Unregulated Contaminants
EPA has not established a maximum legal limit in tapwater for these contaminants

Lead (total), Bromomethane, Radon, Strontium-89, Iodine-131

EPA Violation Summary

Violation CategoryNumber of Violations
Monitoring
(click see violations)
2

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.