The Power of Information

National Drinking Water Database

MTBE in Missouri

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 Missouri

10 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
Kennett, MO
11,50059 of 608.01 ppb
(0 to 45.55 ppb)
Miner, MO
1,20023 of 232.52 ppb
(<0.01 to 6.28 ppb)
3Mound City
Mound City, MO
1,2406 of 81.78 ppb
(0 to 4.24 ppb)
4Holt Co Pwsd # 1
1,1551 of 11.27 ppb
(1.27 ppb)
Pattonsburg, MO
3002 of 50.8 ppb
(0 to 4 ppb)
Diggins, MO
3101 of 30.48 ppb
(0 to 1.44 ppb)
7Ficken Hill Subd
Cedar Hill, MO
4513 of 230.29 ppb
(0 to 2.34 ppb)
Clearmont, MO
19011 of 230.17 ppb
(0 to 2.55 ppb)
Elsberry, MO
2,0007 of 230.06 ppb
(0 to 0.38 ppb)
Camdenton, MO
2,7791 of 22< 0.01 ppb
(< .01 to 3.4E-5 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 Missouri

There are no violations reported for this contaminant in Missouri