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Cohocton Village - Corning, NY

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Serves 859 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.	14 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.	3 chemicals	0.5
Pollutants FoundThe total number of contaminants detected since 2004, according to data provided by the state water agency.	21 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.	577 tests	420

Contaminants Exceeding Health Guidelines

Contaminant	Average/ 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.	5.15 ppm 18.3 ppm	Yes 10 ppm	Yes 10 ppm
Nitrate & nitriteNitrate and nitrite enter water from fertilizer runoff, leaching from septic tanks, and erosion of natural deposits.	8.29 ppm 13 ppm	Yes 10 ppm	Yes 10 ppm
NitriteNitrite is a chemical that enters water from fertilizer runoff, leaching septic tanks, and erosion of natural deposits.	2.78 ppm 2.78 ppm	Yes 1 ppm	Yes 1 ppm
Radium-226Radium-226 is a radioactive element usually found around uranium deposits.	0.18 pCi/L 0.26 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.	0.43 pCi/L 0.72 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.	0.5 pCi/L 1.3 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
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.	2.83 ppb 3.45 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
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.	2.4 ppb 4.2 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
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.	4.8 ppb 8.4 ppb	Yes 0.7 ppb	No 60 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.	1.6 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 60 ppb
Total trihalomethanes (TTHMs)Total trihalomethanes constitute the sum of four disinfection byproducts: chloroform, bromodichloromethane, dibromochloromethane, and bromoform.	10.35 ppb 14.2 ppb	Yes 9.8 ppb	No 80 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.	0.77 ppb 2.3 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 10 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.	1.9 ppb 1.9 ppb	Yes 0.4 ppb	No 80 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.	2.32 ppb 2.32 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
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

Contaminant	Average/ Maximum Result	Health Limit Exceeded	Legal Limit Exceeded	Testing History -Tested      -Detected      -Over Health Guidelines      -Over Legal Limit*
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.	131.67 ppb 225 ppb	No 700 ppb	No 2000 ppb
Chromium (total)Chromium is a metal that pollutes drinking water due to discharge from steel and pulp mills and erosion of natural deposits.	5.1 ppb 12 ppb	No 100 ppb	No 100 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.	1.62 ppb 1.8 ppb	No 5.7 ppb	No 80 ppb
Gross beta particle activity (dissolved)Beta particles are a form of radiation frequently associated with nuclear testing and radioactive mineral deposits.	0.67 pCi/L 2 pCi/L	No	No 15 pCi/L
Monochloroacetic acidMonochloroacetic 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.	1.2 ppb 2.4 ppb	No 70 ppb	No 60 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.	2 ppb 4 ppb	No	No 60 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.	281 ppb 281 ppb	No 300 ppb	No 1000 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 - 104 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, 1,2,3-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-d, 3-Hydroxycarbofuran, Alachlor (Lasso), Aldicarb, Aldicarb sulfone, Aldicarb sulfoxide, Aldrin, Antimony (total), Asbestos, Atrazine, Benzene, Benzo[a]pyrene, Beryllium (total), Bromobenzene, Bromochloromethane, Bromomethane, Butachlor, Cadmium (total), Carbaryl, Carbofuran, Carbon tetrachloride, Chlordane, Chloroethane, Chloromethane, cis-1,2-Dichloroethylene, cis-1,3-Dichloropropene, Cyanide, Dalapon, Di(2-Ethylhexyl) adipate, Di(2-ethylhexyl) phthalate, Dibromomethane, Dicamba, Dichlorodifluoromethane, Dichloromethane (methylene chloride), Dieldrin, Dinoseb, Endrin, Ethylbenzene, Ethylene dibromide (EDB), Gross beta particle activity (pCi/L), Heptachlor, Heptachlor epoxide, Hexachlorobenzene (HCB), Hexachlorobutadiene, Hexachlorocyclopentadiene, Isopropylbenzene, Lindane, m-Dichlorobenzene, m-Xylene, Mercury (total inorganic), Methomyl, Methoxychlor, Metolachlor, Metribuzin, Monobromoacetic acid, Monochlorobenzene (Chlorobenzene), Mtbe, n-Butylbenzene, n-Propylbenzene, o-Chlorotoluene, o-Dichlorobenzene, o-Xylene, Oxamyl (Vydate), p-Chlorotoluene, p-Dichlorobenzene, p-Isopropyltoluene, p-Xylene, Pentachlorophenol, Picloram, Propachlor, Radium-228, sec-Butylbenzene, Selenium (total), Simazine, Styrene, tert-Butylbenzene, Tetrachloroethylene, Thallium (total), Toluene, Total polychlorinated biphenyls (PCBs), Toxaphene, trans-1,2-Dichloroethylene, trans-1,3-Dichloropropene, Trichloroacetic acid, Trichloroethylene, Trichlorofluoromethane, Vinyl chloride

Pollution Summary

21	Total Contaminants Detected (2004 - 2009) Arsenic (total), Barium (total), Chromium (total), Copper, Lead (total), Nitrate & nitrite, Nitrate, Nitrite, Monochloroacetic acid, Dichloroacetic acid, Dibromoacetic acid, Total haloacetic acids (HAAs), Chloroform, Bromoform, Bromodichloromethane, Dibromochloromethane, Total trihalomethanes (TTHMs), Combined Radium (-226 & -228), Radium-226, Gross beta particle activity (dissolved), Alpha particle activity
4	Agricultural Pollutants (pesticides, fertilizer, factory farms) Arsenic (total), Nitrate & nitrite, Nitrate, Nitrite
6	Sprawl and Urban Pollutants (road runoff, lawn pesticides, human waste) Arsenic (total), Copper, Lead (total), Nitrate & nitrite, Nitrate, Nitrite
11	Industrial Pollutants Arsenic (total), Barium (total), Chromium (total), Lead (total), Nitrate & nitrite, Nitrate, Nitrite, Combined Radium (-226 & -228), Radium-226, Gross beta particle activity (dissolved), Alpha particle activity
9	Water Treatment and Distribution Byproducts (pipes and fixtures, treatment chemicals and byproducts) Total trihalomethanes (TTHMs), Total haloacetic acids (HAAs), Chloroform, Bromodichloromethane, Dibromochloromethane, Dichloroacetic acid, Bromoform, Dibromoacetic acid, Monochloroacetic acid
12	Naturally Occurring (naturally present but increased for lands denuded by sprawl, agriculture, or industrial development) Nitrate, Copper, Nitrate & nitrite, Barium (total), Lead (total), Arsenic (total), Radium-226, Alpha particle activity, Combined Radium (-226 & -228), Chromium (total), Nitrite, Gross beta particle activity (dissolved)
1	Unregulated Contaminants EPA has not established a maximum legal limit in tapwater for these contaminants Lead (total)

EPA Violation Summary

Violation Category	Number of Violations
MCL and Treatment (click see violations)close	7
Violation Date of Violation Over maximum contaminant level, Average Nitrate 2004/10/01 - 2004/10/31 Improper Treatment Techniques 2004/12/01 - 2004/12/31 Over maximum contaminant level, Average Nitrate 2005/01/01 - 2005/01/31 Over maximum contaminant level, Average Chlorite 2005/03/01 - 2005/03/31 Over maximum contaminant level, Average Chlorite 2005/04/01 - 2005/04/30 Over maximum contaminant level, Average Chlorite 2005/06/01 - 2005/06/30 Over maximum contaminant level, Average Nitrate 2005/11/01 - 2005/11/30
Monitoring (click see violations)close	6
Violation Date of Violation Failure to monitor regularly Nitrate 2004/04/01 - 2004/04/30 Failure to monitor regularly Nitrate 2004/03/01 - 2004/03/31 Failure to monitor regularly Nitrate 2004/05/01 - 2004/05/31 Failure to monitor regularly Nitrate 2004/06/01 - 2004/06/30 Failure to monitor regularly Nitrate 2004/07/01 - 2004/07/31 Failure to monitor, Routine Major (Coliform bacteria) 2004/10/01 - 2004/10/31

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.