The Power of Information

National Drinking Water Database

MTBE in Vermont

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 Vermont

12 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
1Alta Gardens Estates
Pownal, VT
1376 of 62.83 ppb
(1.5 to 3.6 ppb)
2Westminster Aqueduct Society
Westminster, VT
1503 of 81.9 ppb
(0 to 9.5 ppb)
3East Wind
Waterbury, VT
743 of 30.97 ppb
(0.8 to 1.2 ppb)
4Tara Townhouses
Dover, VT
484 of 110.63 ppb
(0 to 2.5 ppb)
5Limehurst Mhp
Williamstown, VT
874 of 60.62 ppb
(0 to 1.1 ppb)
6Pinecrest Mobile Home Park
Morristown, VT
1394 of 80.54 ppb
(0 to 1.6 ppb)
7Craftsbury Fire District 2
Craftsbury, VT
4202 of 40.48 ppb
(0 to 1.1 ppb)
8Irasburg FD #1
Irasburg, VT
2003 of 50.44 ppb
(0 to 0.8 ppb)
9Hardwick Town Water System
Hardwick, VT
1,9002 of 40.39 ppb
(0 to 0.88 ppb)
10Barnet Water System Inc
Barnet, VT
2052 of 50.23 ppb
(0 to 0.95 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 Vermont

There are no violations reported for this contaminant in Vermont