MTBE
Gafford Chapel Water Supply Corporation
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.
13
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 | 2 | 0 | ND |
| 2019 | ND | 2 | 0 | ND |
| 2020 | ND | 3 | 0 | ND |
| 2021 | ND | 2 | 0 | ND |
| 2022 | ND | 2 | 0 | ND |
| 2023 | ND | 2 | 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 |
|---|---|---|
| 2018-04-12 | Q1815138011 | ND |
| 2018-04-12 | Q1815138014 | ND |
| 2019-05-22 | Q1927789003 | ND |
| 2019-05-22 | Q1927789005 | ND |
| 2020-02-20 | Q2006545001 | ND |
| 2020-03-30 | Q2012915001 | ND |
| 2020-05-26 | Q2020631003 | ND |
| 2021-10-14 | Q2128874013 | ND |
| 2021-10-14 | Q2128874015 | ND |
| 2022-07-27 | Q2221394001 | ND |
| 2022-10-26 | Q2232337003 | ND |
| 2023-07-18 | Q2327998005 | ND |
| 2023-07-18 | Q2327998007 | ND |