The Power of Information

National Drinking Water Database

MTBE in Texas

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 Texas

8 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
1Dalhart Municipal Water System
Dalhart, TX
7,2002 of 34.3 ppb
(0 to 7.42 ppb)
2Texin Enterprises Water System
Lubbock, TX
305 of 52.89 ppb
(2.18 to 3.6 ppb)
3Westgate Manufactured Townhome Community
Midland, TX
1472 of 50.51 ppb
(0 to 2.5 ppb)
4Klondike High School
Lamesa, TX
2501 of 80.4 ppb
(0 to 3.21 ppb)
5Springs Hill Wsc
Seguin, TX
14,1782 of 40.31 ppb
(0 to 0.71 ppb)
6Center Point Taylor System
Houston, TX
5103 of 70.15 ppb
(0 to 0.4 ppb)
7Oak Grove Mobile Home Park
Kerrville, TX
2341 of 50.06 ppb
(0 to 0.28 ppb)
8City of Boerne
Boerne, TX
7,4101 of 90.04 ppb
(0 to 0.4 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 Texas

There are no violations reported for this contaminant in Texas