Know Your Environment. Protect Your Health.

MTBE

Hartford

MTBE was used as gasoline oxygenation additive to boost the octane number. In 2005, MTBE was replaced by ethanol as a gasoline additive. MTBE causes cancers in rats.

 

14

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20181.65 ppb43ND - 2.50 ppb
20191.35 ppb440.780 ppb - 2.40 ppb
20201.53 ppb331.40 ppb - 1.70 ppb
20212.20 ppb112.20 ppb
20225.80 ppb115.80 ppb
20234.60 ppb114.60 ppb

ppb = parts per billion

State, National, and Health Guidelines for Drinking Water

EWG Health Guideline: 13 ppb

The EWG Health Guideline of 13 ppb for MTBE was defined by the California Office of Environmental Health Hazard Assessment as a public health goal, the level of a drinking water contaminant that does not pose a significant health risk. This health guideline protects against cancer.

ppb = parts per billion

All test results

Date Lab ID Result
2018-01-158012323-011.90 ppb
2018-05-158052957-012.50 ppb
2018-07-238074417-01ND
2018-10-168103480-012.20 ppb
2019-01-149012448-012.40 ppb
2019-05-209054161-011.20 ppb
2019-07-169073599-010.780 ppb
2019-11-189113327-011.000 ppb
2020-01-270014692-011.40 ppb
2020-05-200053840-011.50 ppb
2020-08-110082578-011.70 ppb
2021-09-21EI04364-012.20 ppb
2022-08-31FI00240-015.80 ppb
2023-07-24GG04303-014.60 ppb