MTBE
City of Rio Hondo
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.
10
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 | ND | 1 | 0 | ND |
| 2019 | ND | 1 | 0 | ND |
| 2020 | ND | 4 | 0 | ND |
| 2021 | ND | 2 | 0 | ND |
| 2022 | ND | 1 | 0 | ND |
| 2023 | ND | 1 | 0 | ND |
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 |
|---|---|---|
| 2018-08-15 | AE37208 | ND |
| 2019-07-10 | AE73936 | ND |
| 2020-03-06 | AF01729 | ND |
| 2020-06-09 | AF14663 | ND |
| 2020-08-19 | AF24306 | ND |
| 2020-10-07 | AF29837 | ND |
| 2021-01-27 | AF41377 | ND |
| 2021-04-29 | AF51966 | ND |
| 2022-02-03 | AF83317 | ND |
| 2023-02-01 | AG27165 | ND |