EWG INVESTIGATION

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EWG Statement, 03/10/2008

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NATIONAL SUMMARY

Quality Varies Across the U.S.

CONTAMINANTS DATABASE

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Tap Water Quality Report The State of New York 2,836 Water Systems Serving 17,904,511 People

An Environmental Working Group analysis of tap water tests from 1998 through 2003 for 2,836 communities across New York shows 104 pollutants were found in drinking water across the state.

Pollution Summary

104 41	32 8	21 11	69 30	16 8	27 17
Total pollutants	Agricultural pollutants	Sprawl and Urban pollutants	Industrial pollutants	Water Treatment and Distribution Byproducts	Naturally occurring pollutants
Number of pollutants detected (2001 - 2003)			Over health based limits

NOTE: Health based limits included in this analysis include enforceable drinking water limits (called Maximum Contaminant Limits, or MCLs) as well as governmental, non-enforceable health guidelines, such as Maximum Contaminant Limit Goals (MCLGs), lifetime health advisory levels, one-day and ten-day advisory levels to protect children from non-cancer health endpoints, and other government-established health guidelines for tap water contaminants.

Health Summary

The federal government has set standards for 80 chemical pollutants in tap water, balancing health concerns and treatment costs.

Contaminants found in state tap water (1998-2003): 104

Total population exposed above health-based limits: 1,221,890

Communities served water with contaminants above health-based limits: 418

Health effects or target organs of contaminants found: Cardiovascular or Blood Toxicity, Cancer, Developmental Toxicity, Endocrine Toxicity, Immunotoxicity, Kidney Toxicity, Gastrointestinal or Liver Toxicity, Musculoskeletal Toxicity, Neurotoxicity, Reproductive Toxicity, Respiratory Toxicity, and Skin Sensitivity.

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Contaminants found above health based limits: 41

Rank	Contaminant Name	Population Exposed (of 17,904,511 Total)		Number of Water Systems (of 2,836) Total
		At Any Level	Above Health Limits See Note	With Detected	Above Health Limits See Note
1	Nitrate	1,495,651	9,675	639	7
		Chemical that enters water from fertilizer runoff, leaching septic tanks, and erosion of natural deposits
2	Barium (total)	550,418	8,514	269	17
		Mineral from drilling and mining waste runoff; erosion of natrual deposits
3	Copper	442,173	116,088	231	65
		contaminant that enters water by corrosion of household plumbing systems; erosion of natural deposits
4	Total trihalomethanes (TTHMs)	1,094,371	909,169	218	165
		Measure of four disinfection by-products
5	Bromodichloromethane	932,661	878,670	199	185
		Disinfection by-product
6	Chloroform	1,027,754	819,490	196	137
		Disinfection by-product
7	Sulfate	887,884	0	196	0
		Substance from natural deposits, industrial processes, and agriculture
8	Gross beta particle activity (pCi/L)	231,213	0	158	0
		Mainly pollutants from nuclear testing and industrial and medical instruments
9	Lead (total)	214,823	101,131	156	69
		Metal that enters water by corrosion of household plumbing systems; industrial pollutant; erosion of natural deposits
10	Alpha particle activity	230,639	808	139	5
		From mining waste polluants and natural sources

View Full Table

NOTE: Health based limits included in this analysis include enforceable drinking water limits (called Maximum Contaminant Limits, or MCLs) as well as governmental, non-enforceable health guidelines, such as Maximum Contaminant Limit Goals (MCLGs), lifetime health advisory levels, one-day and ten-day advisory levels to protect children from non-cancer health endpoints, and other government-established health guidelines for tap water contaminants.

Testing Summary

The federal government has set standards for some of the pollutants found in tap water supplies.

Contaminants reported as tested by water suppliers in New York		206
	Contaminants tested due to federal law:	99
	Contaminants tested in addition to those required by federal law:	107

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Violations Summary

According to EPA, in 2003 6% of America's public water systems reported one or more violations of a health-based drinking water standard, and 26% reported significant violations of either monitoring and reporting requirements or health-based standards.

Reported violations (1998 - 2003): 7,435

Number of NY systems with violations: 1,513 (53.3%)

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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.