EWG INVESTIGATION

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EWG Statement, 03/10/2008

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Status: Unregulated - EPA has not established a maximum legal limit in tapwater for this contaminant.

25-Manganese-54 is a radioactive form of manganese produced at nuclear facilities. No information on potential health impacts for 25-Manganese-54 was identified in standard government and academic sources.

Sources of 25-Manganese-54:

Industry

An Environmental Working Group analysis of 25-Manganese-54 tests reported by 1 public water suppliers in 1 states shows that between 2002 and 2002, 960 people in 1 communities drank water contaminated with 25-Manganese-54. No health-based limit has been established by the federal government.25-Manganese-54 remains unregulated in tap water, without a maximum legal limit.

Exposure Summary

960 People drinking water contaminated with 25-Manganese-54 1 Community served water contaminated with 25-Manganese-54

Table. 25-Manganese-54 Exposure by State

960 Americans in 1 states were served tap water contaminated with 25-Manganese-54 between 2002 and 2002.

State	Water suppliers with 25-Manganese-54 contamination
	Systems	Population
New York	1	960
Total	1	960

Table. The most polluted communities

960 Americans in 1 communities were served tap water contaminated with 25-Manganese-54 between 2002 and 2002

Ranked by highest average 25-Manganese-54 level

Rank	System	Population Served	Positive test results of total reported tests	Average Level (Range)
1	Earlville Village Earlville, NY	960	1 of 1	127 ppb (127 to 127 ppb)

Testing Summary for 25-Manganese-54

Water suppliers report an average of 1.0 25-Manganese-54 tests per year. 39,750 water suppliers failed to report any 25-Manganese-54 tests at all.

Are tests routinely required for 25-Manganese-54 by federal law? No Water suppliers reporting tests for 25-Manganese-54 (2002-2002): 1 of 39,751 Average testing rate for water supplier reporting tests (2002-2002): 1.0 per year

25-Manganese-54 Violations

Because 25-Manganese-54 is unregulated in tap water, no violations are recorded in EPA's violations database, the Safe Drinking Water Information System. Under the federal tap water law, water suppliers are not required to routinely test for 25-Manganese-54, and any level is legal in tap water.