The Power of Information

National Drinking Water Database


WA of Western Nassau - Great Neck, NY


Serves 120,000 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 New York Department of Health- Bureau of Public Water Supply Protection. 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.
20 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.
5 chemicals
0.5
Pollutants FoundThe total number of contaminants detected since 2004, according to data provided by the state water agency.
37 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.
54,092 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*
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.3.44 ppb
14.81 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
ManganeseManganese is a naturally occurring element released from mineral deposits as well as industrial use.73.25 ppb
560 ppb
Yes
50 ppb
Yes
50 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.1.99 ppb
13.49 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
1,1-DichloroethyleneIndustrial chemical pollutant from manufacture of adhesives, synthetic fibers, refrigerants and plastic wraps.0.46 ppb
9.2 ppb
Yes
7 ppb
Yes
7 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.0.66 ppb
125.15 ppb
Yes
5.7 ppb
Yes
80 ppb
Vinyl chlorideVinyl chloride is a chemical used for production of PVC plastic; it contaminates drinking water due to leaching from PVC pipes and discharges from plastics manufacturing.0.09 ppb
1.4 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
2 ppb
PhosphorusPhosphorus is a component of fertilizer and manure, and a common pollutant in municipal wastewater discharges.217.19 ppb
1540 ppb
Yes
0.1 ppb
Legal at any levelThis is the Federal Limit. State Limits may be lower.
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.0.33 ppb
10.45 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
Radium-228Radium-228 is a radioactive element usually found around uranium deposits.0.89 pCi/L
1.84 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
Alpha particle activityAlpha particles are a form of radiation released from mining waste pollutants and natural sources.1.22 pCi/L
3.67 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.0.25 ppb
6.9 ppb
Yes
0.4 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.0.07 ppb
2.55 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
DieldrinDieldrin is a banned insecticide that is persistent and bioaccumulative, and was historically used on corn, cotton and citrus; it also forms in the environment as a breakdown product of the pesticide aldrin.0.02 ppb
0.12 ppb
Yes
<0.01 ppb
Legal at any levelThis is the Federal Limit. State Limits may be lower.
Lead (total)Lead is a metal that enters water by corrosion of household plumbing systems, discharge of industrial pollution and erosion of natural deposits.0.58 ppb
4.28 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
Heptachlor epoxideHeptachlor epoxide is a beakdown product of heptachlor, a highly toxic and carcinogenic termiticide banned from most applications in the U.S. since 1988.<0.01 ppb
0.05 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
1,2-Dichloroethane1,2-Dichloroethane is a chemical used in the production of vinyl chloride; it is released as a pollutant from industrial chemical factories.<0.01 ppb
0.3 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
1,1-Dichloroethane1,1-Dichloroethane is used in industrial chemical synthesis, as a solvent for plastics, paint, varnish, and finish removers and as an insecticide/fumigant.0.34 ppb
4.3 ppb
Yes
3 ppb
Legal at any levelThis is the Federal Limit. State Limits may be lower.
Radium-226Radium-226 is a radioactive element usually found around uranium deposits.1.24 pCi/L
1.5 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 trihalomethanes (TTHMs)Total trihalomethanes constitute the sum of four disinfection byproducts: chloroform, bromodichloromethane, dibromochloromethane, and bromoform.0.49 ppb
21.05 ppb
Yes
9.8 ppb
No
80 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.0.11 ppb
0.87 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.0.16 ppb
2.6 ppb
No
200 ppb
No
200 ppb
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.1.11 ppb
15.9 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.0.23 ppb
3.8 ppb
No
13 ppb
Legal at any levelThis is the Federal Limit. State Limits may be lower.
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.0.03 ppb
0.55 ppb
No
100 ppb
No
100 ppb
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.0.06 ppb
2.23 ppb
No
1000 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.3.97 ppm
6.61 ppm
No
10 ppm
No
10 ppm
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.22.39 ppb
95 ppb
No
300 ppb
No
1000 ppb
Nitrate & nitriteNitrate and nitrite enter water from fertilizer runoff, leaching from septic tanks, and erosion of natural deposits.3.21 ppm
5.82 ppm
No
10 ppm
No
10 ppm
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.0.58 ppb
2.3 ppb
No
5 ppb
Legal at any levelThis is the Federal Limit. State Limits may be lower.
TrichlorofluoromethaneTrichlorofluoromethane (Freon 11) is a refrigerant, solvent, chemical intermediate and halocarbon aerosol that was banned in 2000 under the Montreal Protocol because of its ozone-depleting properties.<0.01 ppb
0.3 ppb
No
700 ppb
Legal at any levelThis is the Federal Limit. State Limits may be lower.
Gross beta particle activity (pCi/L)Beta particles are a form of radiation frequently associated with nuclear testing and radioactive mineral deposits.2.01 pCi/L
3.22 pCi/L
NoNo
15 pCi/L
p-Dichlorobenzenep-Dichlorobenzene is a carcinogenic pesticide used as a fumigant, deodorant, and in manufacture of other industrial chemicals.<0.01 ppb
0.13 ppb
No
6 ppb
No
75 ppb
m-Xylenem-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.<0.01 ppb
0.8 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.<0.01 ppb
0.9 ppb
No
10000 ppb
No
10000 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.0.4 ppb
2.3 ppb
NoNo
60 ppb
1,1,2-Trichloroethane1,1,2-Trichloroethane is used in production of synthetic fibers, plastic wraps and adhesives; it is released as a pollutant from various chemical manufacturing factories.<0.01 ppb
0.13 ppb
No
0.3 ppb
No
5 ppb
ChloroethaneChloroethane is a volatile solvent used in the manufacture of dyes, drugs, perfumes, insecticides and gasoline additives; it is also used as a refrigerant and anesthetic, and may form in tap water as a result of chlorination.<0.01 ppb
0.6 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 - 101 chemicals

1,1,1,2-Tetrachloroethane, 1,1,2,2-Tetrachloroethane, 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-Dichloropropane, 1,3,5-Trimethylbenzene, 1,3-Dichloropropane, 2,2-Dichloropropane, 2,3,7,8-TCDD (Dioxin), 2,4,5-TP (Silvex), 2,4-d, 3-Hydroxycarbofuran, Alachlor (Lasso), Aldicarb, Aldicarb sulfone, Aldicarb sulfoxide, Aldrin, Antimony (total), Aroclor 1016, Aroclor 1221, Aroclor 1232, Aroclor 1242, Aroclor 1248, Aroclor 1254, Aroclor 1260, Arsenic (total), Atrazine, Barium (total), Benzene, Benzo[a]pyrene, Beryllium (total), Bromobenzene, Bromochloromethane, Bromomethane, Butachlor, Cadmium (total), Carbaryl, Carbofuran, Carbon tetrachloride, Chlordane, Chloromethane, Chromium (total), cis-1,3-Dichloropropene, Cyanide, Dalapon, Di(2-Ethylhexyl) adipate, Di(2-ethylhexyl) phthalate, Dibromomethane, Dicamba, Dichloroacetic acid, Dichloromethane (methylene chloride), Dinoseb, Diquat, Endothall, Endrin, Ethylbenzene, Ethylene dibromide (EDB), Glyphosate, Heptachlor, Hexachlorobenzene (HCB), Hexachlorobutadiene, Hexachlorocyclopentadiene, Isopropylbenzene, Lindane, m-Dichlorobenzene, Mercury (total inorganic), Methomyl, Methoxychlor, Metolachlor, Metribuzin, Monobromoacetic acid, Monochloroacetic acid, n-Butylbenzene, n-Propylbenzene, Nitrite, o-Chlorotoluene, o-Dichlorobenzene, Oxamyl (Vydate), p-Chlorotoluene, p-Isopropyltoluene, p-Xylene, Pentachlorophenol, Picloram, Propachlor, sec-Butylbenzene, Selenium (total), Silver (total), Simazine, Styrene, tert-Butylbenzene, Thallium (total), Toluene, Total polychlorinated biphenyls (PCBs), Toxaphene, trans-1,2-Dichloroethylene, trans-1,3-Dichloropropene, Trichloroacetic acid

Pollution Summary

37Total Contaminants Detected (2004 - 2009)

Copper, Lead (total), Manganese, Nitrate & nitrite, Nitrate, Phosphorus, Heptachlor epoxide, Dieldrin, Dichlorodifluoromethane, Chloroethane, Trichlorofluoromethane, MTBE, cis-1,2-Dichloroethylene, Dibromoacetic acid, Total haloacetic acids (HAAs), Chloroform, Bromoform, Bromodichloromethane, Dibromochloromethane, Total trihalomethanes (TTHMs), p-Dichlorobenzene, Vinyl chloride, 1,1-Dichloroethylene, 1,1-Dichloroethane, 1,2-Dichloroethane, 1,1,1-Trichloroethane, Trichloroethylene, 1,1,2-Trichloroethane, Tetrachloroethylene, Monochlorobenzene (Chlorobenzene), m-Xylene, o-Xylene, Radium-226, Radium-228, Alpha particle activity, Perchlorate, Gross beta particle activity (pCi/L)

8Agricultural Pollutants
(pesticides, fertilizer, factory farms)

Nitrate & nitrite, Nitrate, Phosphorus, Heptachlor epoxide, Dieldrin, p-Dichlorobenzene, Monochlorobenzene (Chlorobenzene), Perchlorate

11Sprawl and Urban Pollutants
(road runoff, lawn pesticides, human waste)

Copper, Lead (total), Nitrate & nitrite, Nitrate, Phosphorus, Trichlorofluoromethane, MTBE, p-Dichlorobenzene, Tetrachloroethylene, m-Xylene, o-Xylene

27Industrial Pollutants

Lead (total), Manganese, Nitrate & nitrite, Nitrate, Phosphorus, Dichlorodifluoromethane, Chloroethane, Trichlorofluoromethane, MTBE, cis-1,2-Dichloroethylene, p-Dichlorobenzene, Vinyl chloride, 1,1-Dichloroethylene, 1,1-Dichloroethane, 1,2-Dichloroethane, 1,1,1-Trichloroethane, Trichloroethylene, 1,1,2-Trichloroethane, Tetrachloroethylene, Monochlorobenzene (Chlorobenzene), m-Xylene, o-Xylene, Radium-226, Radium-228, Alpha particle activity, Perchlorate, Gross beta particle activity (pCi/L)

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

Total trihalomethanes (TTHMs), Total haloacetic acids (HAAs), Chloroform, Bromodichloromethane, Dibromochloromethane, Bromoform, Dibromoacetic acid, Vinyl chloride, Chloroethane

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

Nitrate, Copper, Nitrate & nitrite, Lead (total), Manganese, Radium-228, Radium-226, Alpha particle activity, Gross beta particle activity (pCi/L), Phosphorus

9Unregulated Contaminants
EPA has not established a maximum legal limit in tapwater for these contaminants

Lead (total), Phosphorus, Dieldrin, Dichlorodifluoromethane, Chloroethane, Trichlorofluoromethane, MTBE, 1,1-Dichloroethane, Perchlorate

EPA Violation Summary

Violation CategoryNumber of Violations
Monitoring
(click see violations)
3

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.