The Power of Information

National Drinking Water Database

MTBE in Maine

MTBE (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.

The Most Polluted Communities in Maine

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

Ranked by highest average MTBE level

RankSystem Population Served Positive test results of total reported tests Average Level
1Volmer Country Living Center
Vassalboro, ME
361 of 112 ppb
(12 ppb)
2Charter Oak Mobile Home Villag
Grants Pass, ME
10019 of 198.8 ppb
(1.7 to 42 ppb)
3Maple Ridge Mobile Home Park
Newport, ME
1102 of 33.7 ppb
(0 to 9.2 ppb)
4Howards Trailer Park
Bucksport, ME
655 of 62.15 ppb
(0 to 3.9 ppb)
5Lisbon Water Department
Lisbon Falls, ME
6,00019 of 191.7 ppb
(0.6 to 3 ppb)
6Parker Ridge Retirement Comm
Blue Hill, ME
1141 of 11.6 ppb
(1.6 ppb)
7Happy Trails Mhp
Topsham, ME
331 of 11.6 ppb
(1.6 ppb)
8Country Meadow Apartments
Augusta, ME
532 of 21.55 ppb
(1.5 to 1.6 ppb)
9South Slope Estates Mhp
Carmel, ME
1001 of 11.4 ppb
(1.4 ppb)
10Pheasant Hill Mhp
Wells, ME
351 of 11.3 ppb
(1.3 ppb)

Health Based Limits for MTBE

California Public Health GoalsDefined by the State of California Office of Environmental Health Hazard Assessment (OEHHA) as the level of contaminant that is allowed in drinking water. For acutely toxic substances, levels are set at which scientific evidence indicates that no known or anticipated adverse effects on health will occur, plus an adequate margin-of safety. PHGs for carcinogens or other substances which can cause chronic disease shall be based solely on health effects without regard to cost impacts and shall be set at levels which OEHHA has determined do not pose any significant risk to health.13 ppb

Violation Summary for MTBE in Maine

There are no violations reported for this contaminant in Maine