MTBE
Coraopolis Water & Sewer Authority
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.
8
Samples
0
Samples exceeding legal limit (MCL)
0
Samples exceeding
health guidelines
Testing results - average by year
| Year | Average result | Samples taken | Detections | Range of results |
|---|---|---|---|---|
| 2018 | 1.40 ppb | 1 | 1 | 1.40 ppb |
| 2019 | 0.900 ppb | 1 | 1 | 0.900 ppb |
| 2020 | 0.867 ppb | 3 | 2 | ND - 1.40 ppb |
| 2021 | 1.000 ppb | 1 | 1 | 1.000 ppb |
| 2022 | 0.850 ppb | 1 | 1 | 0.850 ppb |
| 2023 | 0.900 ppb | 1 | 1 | 0.900 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 |
|---|---|---|
| 2018-05-14 | 8054022-01 | 1.40 ppb |
| 2019-05-30 | 9055519-01 | 0.900 ppb |
| 2020-04-07 | 22115695.00 | 1.40 ppb |
| 2020-05-19 | 22308728.00 | ND |
| 2020-10-19 | 23269381.00 | 1.20 ppb |
| 2021-06-28 | 24921587.00 | 1.000 ppb |
| 2022-05-24 | 26742062.00 | 0.850 ppb |
| 2023-06-05 | 29679879.00 | 0.900 ppb |