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National Drinking Water Database


National Drinking Water Database - Chemical Contaminants

Methane


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

Methane is formed during the decay of organic matter; as the principal component of natural gas, it is used as a fuel and in the manufacture of synthetic chemicals.

 
Detected
Found above
health guidelines
Found above
legal limit
States
1
-
-
Water utilities
1
-
-
People Served
750
-
-

Methane Exposure by State

Water utilities in 1 states have reported detecting Methane in treated tap water since 2004, according to EWG's analysis of water quality data supplied by state water agencies.

StateWater Suppliers with Methane contamination
SystemsPopulation
New York1750
Total1750

The Most Polluted Communities

1 water utilities reported detecting Methane in tap water since 2004, according to EWG's analysis of water quality data supplied by state water agencies

Ranked by highest average Methane level

RankSystem Population Served Positive test results of total reported tests Average Level
(Range)
1Belfast Water District
Belfast, NY
7506 of 610515.83 ppb
(255 to 25400 ppb)

Testing Summary for Methane

Are tests routinely required for Methane by federal law?No
Water suppliers reporting tests for Methane (2005-2009):2 of 47,576
Average testing rate for water supplier reporting tests (2005-2009):0.7 per year