MTBE
Mills Mobile Home Park 1&2
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.
19
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 | N/A | 0 | 0 | N/A |
| 2019 | 1.72 ppb | 3 | 3 | 1.51 ppb - 1.91 ppb |
| 2020 | 1.89 ppb | 3 | 3 | 1.64 ppb - 2.08 ppb |
| 2021 | 2.16 ppb | 4 | 4 | 2.06 ppb - 2.29 ppb |
| 2022 | 1.87 ppb | 4 | 4 | 1.42 ppb - 2.20 ppb |
| 2023 | 2.20 ppb | 5 | 5 | 1.82 ppb - 2.77 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 |
|---|---|---|
| 2019-01-10 | AE23871 | 1.91 ppb |
| 2019-09-18 | AE37405 | 1.51 ppb |
| 2019-12-03 | AE40976 | 1.73 ppb |
| 2020-05-26 | AE48964 | 1.64 ppb |
| 2020-08-19 | AE53092 | 1.95 ppb |
| 2020-11-04 | AE56847 | 2.08 ppb |
| 2021-02-23 | AE61680 | 2.06 ppb |
| 2021-05-25 | AE66392 | 2.29 ppb |
| 2021-08-31 | AE71190 | 2.07 ppb |
| 2021-11-03 | AE74428 | 2.22 ppb |
| 2022-03-10 | AE80559 | 2.12 ppb |
| 2022-05-26 | AE84350 | 2.20 ppb |
| 2022-08-03 | AE87586 | 1.73 ppb |
| 2022-10-27 | AE92192 | 1.42 ppb |
| 2023-03-06 | AE98035 | 2.77 ppb |
| 2023-05-25 | AF02667 | 2.38 ppb |
| 2023-08-07 | AF06654 | 1.99 ppb |
| 2023-09-26 | AF09044 | 2.05 ppb |
| 2023-10-24 | AF10543 | 1.82 ppb |