The Power of Information

National Drinking Water Database


Kent County Water Authority - Warwick, RI


Serves 70,000 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 Rhode Island 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.

 
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.
2 chemicals
0.5
Pollutants FoundThe total number of contaminants detected since 2004, according to data provided by the state water agency.
25 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.
4,613 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*
Total trihalomethanes (TTHMs)Total trihalomethanes constitute the sum of four disinfection byproducts: chloroform, bromodichloromethane, dibromochloromethane, and bromoform.28.69 ppb
121.3 ppb
Yes
9.8 ppb
Yes
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.24.53 ppb
110 ppb
Yes
5.7 ppb
Yes
80 ppb
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.3.83 ppb
63 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.0.3 ppb
5.6 ppb
Yes
0.4 ppb
No
80 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.0.06 ppb
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
80 ppb
Carbon tetrachlorideCarbon tetrachloride is an industrial solvent and refrigerant released as a pollutant from various chemical plants and the petroleum refining industry.0.11 ppb
3.2 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
5 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.0.04 ppb
1.5 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
5 ppb
Radium-228Radium-228 is a radioactive element usually found around uranium deposits.0.71 pCi/L
2.12 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
Combined Radium (-226 & -228)Radium is a radioactive element usually found around uranium deposits.1.06 pCi/L
2.12 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
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.5.25 ppb
5.25 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*
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.3.22 ppm
5.76 ppm
No
10 ppm
No
10 ppm
MTBEMTBE (methyl tert-butyl ether) is a fuel additive that had been used as an octane enhancer in unleaded gasoline; it contaminates groundwater due to spillage or leakage at gas stations, and has been banned or scheduled for phaseout in most states.0.15 ppb
1 ppb
No
13 ppb
Legal at any levelThis is the Federal Limit. State Limits may be lower.
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.0.75 ppb
15 ppb
No
1800 ppb
No
10000 ppb
DacthalDacthal (DCPA) is an herbicide used on golf courses, home lawns and gardens, and strawberries, cotton, and soybeans; dacthal and its degradates are among the most commonly detected pesticide residues in drinking water wells.0.12 ppb
0.54 ppb
No
70 ppb
Legal at any levelThis is the Federal Limit. State Limits may be lower.
Beryllium (total)Beryllium is a metal associated with metal refineries and combustion of fossil fuels, especially coal burning; it is released into the environment from electrical, aerospace and defense industries.0.32 ppb
0.8 ppb
No
1 ppb
No
4 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.0.24 ppb
5.8 ppb
No
300 ppb
No
700 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.3 ppb
10 ppb
No
700 ppb
No
2000 ppb
IsopropylbenzeneIsopropylbenzene is an intermediate in industrial chemical production, and is also used as a thinner for paints and enamels and a component of fuel; it is released from petroleum refining, evaporation and combustion.0.03 ppb
0.9 ppb
No
700 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
0.2 ppb
No
150 ppb
No
1000 ppb
Monochlorobenzene (Chlorobenzene)Monochlorobenzene is used as a solvent in pesticides, a degreasing agent and a chemical intermediate; it is released as a pollutant from various industrial chemical factories and has been found in surface and groundwater.0.02 ppb
0.6 ppb
No
100 ppb
No
100 ppb
1,3,5-Trimethylbenzene1,3,5-Trimethylbenzene is a gasoline hydrocarbon and industrial chemical used in building materials, furnishings and chemical manufacturing.0.08 ppb
2 ppb
No
10000 ppb
Legal at any levelThis is the Federal Limit. State Limits may be lower.
DibromomethaneDibromomethane is an unregulated byproduct of tap water disinfection and a manufactured chemical used in chemical synthesis and as an ingredient in fire extinguishing fluids.0.28 ppb
10 ppb
NoLegal at any levelThis is the Federal Limit. State Limits may be lower.
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.0.18 ppb
5.1 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.0.03 ppb
1 ppb
NoLegal at any levelThis is the Federal Limit. State Limits may be lower.
Antimony (total)Antimony is a metal that enters water from petroleum refinery pollution, fire retardants, ceramics, electronics and solder.0.4 ppb
2 ppb
No
5.6 ppb
No
6 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.

Contaminants Not Detected - 122 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, 1,2,4-Trimethylbenzene, 1,2-Dichloroethane, 1,2-Dichloropropane, 1,3-Dichloropropane, 1,3-Dichloropropene, 2,2-Dichloropropane, 2,4,5-TP (Silvex), 2,4-d, 2,4-Dinitrotoluene, 2,6-Dinitrotoluene, 3-Hydroxycarbofuran, Acenaphthylene, Alachlor (Lasso), Aldicarb, Aldicarb sulfone, Aldicarb sulfoxide, Aldrin, Alpha particle activity, Alpha particle activity (excl radon and uranium), Anthracene, Aroclor 1016, Aroclor 1221, Aroclor 1232, Aroclor 1242, Aroclor 1248, Aroclor 1254, Aroclor 1260, Arsenic (total), Atrazine, Benzene, Benzo[a]anthracene, Benzo[a]pyrene, Benzo[b]fluoranthene, Benzo[b]fluoranthene & Benzo[k]fluoranthene, Benzo[g,h,i]perylene, Benzo[k]fluoranthene, Bromobenzene, Bromochloromethane, Bromomethane, Butachlor, Butyl Benzylphthalate, Cadmium (total), Carbaryl, Carbofuran, Chlordane, Chloroethane, Chromium (total), Chrysene, cis-1,2-Dichloroethylene, cis-1,3-Dichloropropene, Cyanide, Dalapon, Di(2-Ethylhexyl) adipate, Di(2-ethylhexyl) phthalate, Di-n-butylphthalate, Dibenz[a,h]anthracene, Dicamba, Dichlorodifluoromethane, Dieldrin, Diethylphthalate, Dimethylphthalate, Dinoseb, Endrin, Ethylene dibromide (EDB), Fluorene, Heptachlor, Heptachlor epoxide, Hexachlorobenzene (HCB), Hexachlorobutadiene, Hexachlorocyclopentadiene, Indeno[1,2,3-cd]pyrene, Isophorone, Lindane, m- & p- Xylene, m-Dichlorobenzene, Manganese, Mercury (total inorganic), Methomyl, Methoxychlor, Metolachlor, Metribuzin, n-Butylbenzene, n-Hexane, Naphthalene, Nitrite, o-Chlorotoluene, o-Dichlorobenzene, o-Xylene, Oxamyl (Vydate), p-Chlorotoluene, p-Dichlorobenzene, p-Isopropyltoluene, Pentachlorophenol, Phenanthrene, Picloram, Propachlor, Pyrene, Radium-226, sec-Butylbenzene, Selenium (total), Simazine, Styrene, tert-Butylbenzene, Tetrachloroethylene, Thallium (total), Toxaphene, trans-1,2-Dichloroethylene, trans-1,3-Dichloropropene, Trichloroethylene, Trichlorofluoromethane, Vinyl chloride

Pollution Summary

25Total Contaminants Detected (2004 - 2009)

Barium (total), Nitrate, Antimony (total), Beryllium (total), Dacthal, Chloromethane, MTBE, Dibromomethane, 1,3,5-Trimethylbenzene, Total haloacetic acids (HAAs), Chloroform, Bromoform, Bromodichloromethane, Dibromochloromethane, Total trihalomethanes (TTHMs), Xylenes (total), Dichloromethane (methylene chloride), Carbon tetrachloride, Monochlorobenzene (Chlorobenzene), Toluene, Ethylbenzene, Isopropylbenzene, n-Propylbenzene, Combined Radium (-226 & -228), Radium-228

4Agricultural Pollutants
(pesticides, fertilizer, factory farms)

Nitrate, Dacthal, Monochlorobenzene (Chlorobenzene), Ethylbenzene

7Sprawl and Urban Pollutants
(road runoff, lawn pesticides, human waste)

Nitrate, Antimony (total), Dacthal, MTBE, Xylenes (total), Dichloromethane (methylene chloride), n-Propylbenzene

18Industrial Pollutants

Barium (total), Nitrate, Antimony (total), Beryllium (total), Chloromethane, MTBE, Dibromomethane, 1,3,5-Trimethylbenzene, Xylenes (total), Dichloromethane (methylene chloride), Carbon tetrachloride, Monochlorobenzene (Chlorobenzene), Toluene, Ethylbenzene, Isopropylbenzene, n-Propylbenzene, Combined Radium (-226 & -228), Radium-228

8Water Treatment and Distribution Byproducts
(pipes and fixtures, treatment chemicals and byproducts)

Total trihalomethanes (TTHMs), Total haloacetic acids (HAAs), Chloroform, Bromodichloromethane, Dibromochloromethane, Bromoform, Chloromethane, Dibromomethane

5Naturally Occurring
(naturally present but increased for lands denuded by sprawl, agriculture, or industrial development)

Nitrate, Barium (total), Radium-228, Combined Radium (-226 & -228), Chloromethane

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

Dacthal, Chloromethane, MTBE, Dibromomethane, 1,3,5-Trimethylbenzene, Isopropylbenzene, n-Propylbenzene

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.