The Power of Information

National Drinking Water Database


Greenwich Twp W Dept - National Park, NJ


Serves 4,900 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 New Jersey Department of Environmental 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.

The New Jersey Department of Environmental Protection 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.
13 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.
32 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.
2,001 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.90.94 ppb
155.8 ppb
Yes
50 ppb
Yes
50 ppb
BenzeneBenzene is a petroleum chemical that contaminates drinking water due to emissions from petroleum and chemical industries, leaching landfills and gas storage tanks.0.8 ppb
2.04 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
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.0.23 ppb
1.09 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
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.0.14 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
Alpha particle activity (excl radon and uranium)Alpha particles are a form of radiation associated with radioactive mining waste pollutants and natural sources.7.33 pCi/L
10.25 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
No
15 pCi/L
Radium-226Radium-226 is a radioactive element usually found around uranium deposits.1.43 pCi/L
4.5 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
Combined Radium (-226 & -228)Radium is a radioactive element usually found around uranium deposits.2.3 pCi/L
4.37 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 Uranium (mg/L)Uranium is a radioactive element commonly found in most rocks; processed uranium ore is used for power generation and weapons manufacture.6.15 ppb
15 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
30 ppb
Radium-228Radium-228 is a radioactive element usually found around uranium deposits.1.25 pCi/L
3.03 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
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.0.04 ppb
0.32 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
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
0.23 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.0.03 ppb
0.51 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.1.86 ppb
1.86 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
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*
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.0.34 ppb
0.65 ppb
No
13 ppb
Legal at any levelThis is the Federal Limit. State Limits may be lower.
Alpha particle activity (incl. radon & uranium)Alpha particles are a form of radiation associated with mining waste pollutants and natural sources.7.39 pCi/L
10.25 pCi/L
NoNo
15 pCi/L
Total trihalomethanes (TTHMs)Total trihalomethanes constitute the sum of four disinfection byproducts: chloroform, bromodichloromethane, dibromochloromethane, and bromoform.0.06 ppb
0.65 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.0.04 ppb
0.46 ppb
No
5.7 ppb
No
80 ppb
Combined Uranium (pCi/L)Uranium is a radioactive element commonly found in most rocks; processed ore is used for power generation and weapons manufacture.0.05 pCi/L
0.19 pCi/L
NoNo
15 pCi/L
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.49.95 ppb
152.31 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.1.65 ppm
1.82 ppm
No
10 ppm
No
10 ppm
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.1.59 ppm
1.75 ppm
No
10 ppm
No
10 ppm
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.33.19 ppb
37.67 ppb
No
700 ppb
No
2000 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.0.03 ppb
0.39 ppb
No
1800 ppb
No
10000 ppb
Foaming agents (surfactants)Foaming agents (surfactants) are detergents or detergent-like substances used as cleaning agents in industrial and consumer goods such as personal care products; they are also used as inert ingredients in pesticides.44.33 ppb
75 ppb
No
500 ppb
No
500 ppb
AluminumAluminum is a metal released from metal refineries and mining operations.95.33 ppb
181 ppb
No
200 ppb
No
200 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
0.22 ppb
No
0.4 ppb
No
80 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
0.12 ppb
No
30 ppb
Legal at any levelThis is the Federal Limit. State Limits may be lower.
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
0.16 ppb
No
10000 ppb
No
10000 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.0.02 ppb
0.3 ppb
No
1000 ppb
Legal at any levelThis is the Federal Limit. State Limits may be lower.
AsbestosAsbestos is a mineral fiber introduced into water by the dissolution of asbestos-containing minerals and from decay of asbestos cement in water mains.0.09 MFL
0.37 MFL
No
7 MFL
No
7 MFL
NitriteNitrite is a chemical that enters water from fertilizer runoff, leaching septic tanks, and erosion of natural deposits.0.01 ppm
0.03 ppm
No
1 ppm
No
1 ppm
Silver (total)Silver is an element from natural deposits and mining wastes; it is also associated with the development of photographic and x-ray film and the use of silver in antibacterial consumer products.3.47 ppb
10.4 ppb
No
100 ppb
No
100 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 - 64 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-Dichloropropane, 1,3,5-Trimethylbenzene, 1,3-Dichloropropane, 2,2-Dichloropropane, Antimony (total), Arsenic (total), Beryllium (total), Bromobenzene, Bromochloromethane, Bromoform, Bromomethane, Cadmium (total), Chloroethane, Chromium (total), cis-1,2-Dichloroethylene, cis-1,3-Dichloropropene, Cyanide, Dibromoacetic acid, Dibromomethane, Dichloroacetic acid, Dichloromethane (methylene chloride), Ethylbenzene, Ethylene dibromide (EDB), Hexachlorobutadiene, Isopropylbenzene, m-Dichlorobenzene, m-Xylene, Mercury (total inorganic), Monobromoacetic acid, Monochloroacetic acid, Monochlorobenzene (Chlorobenzene), n-Butylbenzene, n-Propylbenzene, Naphthalene, o-Chlorotoluene, o-Dichlorobenzene, p-Chlorotoluene, p-Dichlorobenzene, p-Isopropyltoluene, p-Xylene, sec-Butylbenzene, Selenium (total), Styrene, tert-Butylbenzene, Thallium (total), Toluene, Total haloacetic acids (HAAs), trans-1,2-Dichloroethylene, trans-1,3-Dichloropropene, Trichloroacetic acid, Trichlorofluoromethane, Vinyl chloride

Pollution Summary

32Total Contaminants Detected (2004 - 2006)

Aluminum, Barium (total), Copper, Lead (total), Manganese, Nitrate & nitrite, Nitrate, Nitrite, Silver (total), Asbestos, Chloromethane, Dichlorodifluoromethane, MTBE, Foaming agents (surfactants), Chloroform, Bromodichloromethane, Dibromochloromethane, Total trihalomethanes (TTHMs), Xylenes (total), 1,2-Dichloroethane, Carbon tetrachloride, Trichloroethylene, Tetrachloroethylene, Benzene, o-Xylene, Alpha particle activity (excl radon and uranium), Alpha particle activity (incl. radon & uranium), Combined Uranium (mg/L), Combined Radium (-226 & -228), Radium-226, Radium-228, Combined Uranium (pCi/L)

4Agricultural Pollutants
(pesticides, fertilizer, factory farms)

Nitrate & nitrite, Nitrate, Nitrite, Foaming agents (surfactants)

12Sprawl and Urban Pollutants
(road runoff, lawn pesticides, human waste)

Copper, Lead (total), Nitrate & nitrite, Nitrate, Nitrite, Silver (total), MTBE, Foaming agents (surfactants), Xylenes (total), Tetrachloroethylene, Benzene, o-Xylene

27Industrial Pollutants

Aluminum, Barium (total), Lead (total), Manganese, Nitrate & nitrite, Nitrate, Nitrite, Silver (total), Asbestos, Chloromethane, Dichlorodifluoromethane, MTBE, Foaming agents (surfactants), Xylenes (total), 1,2-Dichloroethane, Carbon tetrachloride, Trichloroethylene, Tetrachloroethylene, Benzene, o-Xylene, Alpha particle activity (excl radon and uranium), Alpha particle activity (incl. radon & uranium), Combined Uranium (mg/L), Combined Radium (-226 & -228), Radium-226, Radium-228, Combined Uranium (pCi/L)

6Water Treatment and Distribution Byproducts
(pipes and fixtures, treatment chemicals and byproducts)

Total trihalomethanes (TTHMs), Chloroform, Bromodichloromethane, Dibromochloromethane, Chloromethane, Asbestos

17Naturally Occurring
(naturally present but increased for lands denuded by sprawl, agriculture, or industrial development)

Aluminum, Barium (total), Copper, Lead (total), Manganese, Nitrate & nitrite, Nitrate, Nitrite, Silver (total), Chloromethane, Alpha particle activity (excl radon and uranium), Alpha particle activity (incl. radon & uranium), Combined Uranium (mg/L), Combined Radium (-226 & -228), Radium-226, Radium-228, Combined Uranium (pCi/L)

4Unregulated Contaminants
EPA has not established a maximum legal limit in tapwater for these contaminants

Lead (total), Chloromethane, Dichlorodifluoromethane, MTBE

EPA Violation Summary

Violation CategoryNumber of Violations
Monitoring
(click see violations)
7

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.