The Power of Information

National Drinking Water Database


Wild Quail District - Dover, DE


Serves 792 people - Test data available: 2004-2007

This drinking water quality report shows results of tests conducted by the water utility and provided to the Environmental Working Group (EWG) by the Delaware Health and Social Services- Division 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.
11 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.
0 chemicals
0.5
Pollutants FoundThe total number of contaminants detected since 2004, according to data provided by the state water agency.
27 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.
3,300 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*
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.9.36 ppb
29.9 ppb
Yes
5.7 ppb
No
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.2.03 ppb
4.6 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
80 ppb
Total trihalomethanes (TTHMs)Total trihalomethanes constitute the sum of four disinfection byproducts: chloroform, bromodichloromethane, dibromochloromethane, and bromoform.12.85 ppb
35.24 ppb
Yes
9.8 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.0.89 ppb
2.9 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.0.18 ppb
0.85 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
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.0.22 ppb
0.64 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
Di(2-ethylhexyl) phthalateDi(2-ethylhexyl) phthalate is a pollutant from rubber and industrial chemical factories and a leachate from PVC pipes; it is classified by EPA as a probable human carcinogen.0.37 ppb
1.87 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
6 ppb
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.4.15 ppb
6.7 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.8.73 ppb
12.2 ppb
Yes
0.7 ppb
No
60 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.1.99 ppb
2.9 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
Alpha particle activityAlpha particles are a form of radiation released from mining waste pollutants and natural sources.0.28 pCi/L
0.42 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
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.0.63 ppb
2.36 ppb
No
70 ppb
No
70 ppb
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.0.88 ppb
3.55 ppb
No
13 ppb
Legal at any levelThis is the Federal Limit. State Limits may be lower.
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.2.5 ppm
5.3 ppm
No
10 ppm
No
10 ppm
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.3.45 ppb
5.4 ppb
No
20 ppb
No
60 ppb
Nitrate & nitriteNitrate and nitrite enter water from fertilizer runoff, leaching from septic tanks, and erosion of natural deposits.2.93 ppm
5.15 ppm
No
10 ppm
No
10 ppm
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.1.11 ppb
1.8 ppb
NoNo
60 ppb
Bromochloroacetic acidBromochloroacetic acid is a disinfection byproduct, and is formed when chlorine, chloramines or other disinfectants react with organic and inorganic matter in water.1.71 ppb
2.3 ppb
NoLegal 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.5.24 ppb
13.2 ppb
No
100 ppb
No
100 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.0.13 ppb
1.93 ppb
No
1800 ppb
No
10000 ppb
cis-1,3-Dichloropropenecis-1,3-Dichloropene is used in chemical synthesis, and in agriculture as a soil fumigant and nematocide.0.02 ppb
0.3 ppb
NoLegal at any levelThis is the Federal Limit. State Limits may be lower.
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.0.05 ppb
0.83 ppb
No
200 ppb
No
200 ppb
DiethylphthalateDiethylphthalate is an industrial solvent used in many consumer products, particularly those containing fragrances; it may be present in perfume, cologne, deodorant, soap, shampoo, hand lotion, and other personal care products.0.18 ppb
2.17 ppb
No
1700 ppb
Legal at any levelThis is the Federal Limit. State Limits may be lower.
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.8.71 ppb
34.85 ppb
No
700 ppb
No
2000 ppb
Methyl ethyl ketoneMethyl ethyl ketone is a synthetic chemical used as a solvent for paints, coatings, adhesives, printing inks, and other industrial and consumer goods; it occurs naturally in some vegetation and forms during ozonation of drinking water. 1.3 ppb
2.6 ppb
No
4000 ppb
Legal 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.3.4 ppb
6.8 ppb
No
6000 ppb
Legal at any levelThis is the Federal Limit. State Limits may be lower.
TetrahydrofuranTetrahydrofuran is an intermediate in chemical manufacturing to produce food storage and packaging materials, rubber, resins and plastics, and is a solvent for dyes and lacquers.1.08 ppb
2.15 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 - 161 chemicals

1,1,1,2-Tetrachloroethane, 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, 1,3,5-Trimethylbenzene, 1,3-Dichloropropane, 2,2-Dichloropropane, 2,4,5-TP (Silvex), 2,4,5-Trichlorophenol, 2,4-d, 2,4-Dinitrotoluene, 2,6-Dinitrotoluene, 2-Chloroethylvinyl ether, 2-Hexanone, 2-Methyl naphthalene, 3-Hydroxycarbofuran, Acenaphthene, Acenaphthylene, Acetochlor, Acrylonitrile, Alachlor (Lasso), Aldicarb, Aldicarb sulfone, Aldicarb sulfoxide, Aldrin, Allyl Chloride (3-chloro-1-propene), Alpha Chlordane, alpha-Lindane, Anthracene, Antimony (total), Aroclor 1016, Aroclor 1221, Aroclor 1232, Aroclor 1242, Aroclor 1248, Aroclor 1254, Aroclor 1260, Atrazine, Baygon (Propoxur), Benzene, Benzo[a]anthracene, Benzo[a]pyrene, Benzo[b]fluoranthene, Benzo[g,h,i]perylene, Benzo[k]fluoranthene, Beryllium (total), beta-Lindane, bis(2-chloroethyl) ether, bis(2-ethylhexyl) phthalate, Bromobenzene, Bromochloromethane, Bromomethane, Butachlor, Butyl Benzylphthalate, Cadmium (total), Carbaryl, Carbofuran, Carbon tetrachloride, Chlordane, Chloroethane, Chloromethane, Chrysene, Copper, Dacthal, Dalapon, delta-BHC, Di(2-Ethylhexyl) adipate, Di-n-butylphthalate, Di-n-octylphthalate, Dibenzofuran, Dibenz[a,h]anthracene, Dibromomethane, Dicamba, Dichlorodifluoromethane, Dichloromethane (methylene chloride), Dieldrin, Dimethylphthalate, Dinoseb, Endosulfan I, Endosulfan II, Endosulfan Sulfate, Endrin, Endrin Aldehyde, EPTC (Eptam), Ethyl Methacrylate, Ethylbenzene, Ethylene dibromide (EDB), Fluoranthene, Fluorene, Fluorobenzene, Gamma Chlordane, Heptachlor, Heptachlor epoxide, Hexachlorobenzene (HCB), Hexachlorobutadiene, Hexachlorocyclopentadiene, Indeno[1,2,3-cd]pyrene, Iodomethane, Isopropylbenzene, Lead (total), Lindane, m- & p- Xylene, m-Dichlorobenzene, Mercury (total inorganic), Methiocarb, Methomyl, Methoxychlor, Methyl isobutyl ketone, Methyl methacrylate, Metolachlor, Metribuzin, Molinate (Ordram), 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, para-para DDE, Pentachlorophenol, Phenanthrene, Picloram, Propachlor, Pyrene, sec-Butylbenzene, Selenium (total), Simazine, Styrene, Terbacil, tert-Butylbenzene, Tetrachloroethylene, Thallium (total), Toluene, Total polychlorinated biphenyls (PCBs), Toxaphene, trans-1,2-Dichloroethylene, trans-1,3-Dichloropropene, trans-1,4-Dichloro-2-butene, Trichlorofluoromethane, Trifluralin, Vinyl acetate, Vinyl chloride

Pollution Summary

27Total Contaminants Detected (2004 - 2007)

Barium (total), Chromium (total), Nitrate & nitrite, Nitrate, cis-1,3-Dichloropropene, Acetone, Methyl ethyl ketone, MTBE, Tetrahydrofuran, Diethylphthalate, cis-1,2-Dichloroethylene, Trichloroacetic acid, Dibromoacetic acid, Bromochloroacetic acid, Xylenes (total), 1,1,1-Trichloroethane, Arsenic (total), Di(2-ethylhexyl) phthalate, Dichloroacetic acid, Total haloacetic acids (HAAs), Chloroform, Bromoform, Bromodichloromethane, Dibromochloromethane, Total trihalomethanes (TTHMs), Trichloroethylene, Alpha particle activity

3Agricultural Pollutants
(pesticides, fertilizer, factory farms)

Nitrate & nitrite, Nitrate, Arsenic (total)

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

Nitrate, Nitrate & nitrite, Arsenic (total), MTBE, Xylenes (total), Acetone, Methyl ethyl ketone, Diethylphthalate

17Industrial Pollutants

Barium (total), Chromium (total), Nitrate & nitrite, Nitrate, cis-1,3-Dichloropropene, Acetone, Methyl ethyl ketone, MTBE, Tetrahydrofuran, Diethylphthalate, cis-1,2-Dichloroethylene, Xylenes (total), 1,1,1-Trichloroethane, Arsenic (total), Di(2-ethylhexyl) phthalate, Trichloroethylene, Alpha particle activity

11Water 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, Bromoform, Dibromoacetic acid, Bromochloroacetic acid, Di(2-ethylhexyl) phthalate

6Naturally Occurring
(naturally present but increased for lands denuded by sprawl, agriculture, or industrial development)

Nitrate, Nitrate & nitrite, Barium (total), Arsenic (total), Alpha particle activity, Chromium (total)

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

cis-1,3-Dichloropropene, Acetone, Methyl ethyl ketone, MTBE, Tetrahydrofuran, Diethylphthalate, Bromochloroacetic acid

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.