MTBE
La Verne WD
NOTE: La Verne WD purchases water from Three Valleys Municipal Water District which is required to test for mtbe. Sample information shown below was taken by Three Valleys Municipal Water District.
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.
Samples
Samples exceeding legal limit (MCL)
Samples exceeding
health guidelines
Testing results - average by year
| Year | Average result | Samples taken | Detections | Range of results |
|---|---|---|---|---|
| 2018 | ND | 9 | 0 | ND |
| 2019 | ND | 7 | 0 | ND |
| 2020 | ND | 7 | 0 | ND |
| 2021 | ND | 9 | 0 | ND |
| 2022 | ND | 9 | 0 | ND |
| 2023 | ND | 8 | 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
NOTE: La Verne WD purchases water from Three Valleys Municipal Water District which is required to test for mtbe. Sample information shown below was taken by Three Valleys Municipal Water District.
| Date | Lab ID | Result |
|---|---|---|
| 2018-01-16 | CA1910041_002_002-201801160900 | ND |
| 2018-03-20 | CA1910041_004_004-201803200900 | ND |
| 2018-03-20 | CA1910041_005_005-201803200903 | ND |
| 2018-03-20 | CA1910041_001_001-201803200920 | ND |
| 2018-03-22 | CA1910041_002_002-201803220945 | ND |
| 2018-08-21 | CA1910041_001_001-201808210905 | ND |
| 2018-08-21 | CA1910041_002_002-201808210910 | ND |
| 2019-03-19 | CA1910041_002_002-201903190950 | ND |
| 2019-03-19 | CA1910041_001_001-201903190930 | ND |
| 2019-04-16 | CA1910041_005_005-201904160904 | ND |
| 2019-04-16 | CA1910041_004_004-201904160910 | ND |
| 2019-07-16 | CA1910041_001_001-201907160740 | ND |
| 2019-07-16 | CA1910041_002_002-201907160730 | ND |
| 2019-09-17 | CA1910041_002_002-201909170910 | ND |
| 2019-12-17 | CA1910041_002_002-201912170940 | ND |
| 2020-03-17 | CA1910041_001_001-202003170815 | ND |
| 2020-03-17 | CA1910041_002_002-202003170750 | ND |
| 2020-03-31 | CA1910041_004_004-20200331NUL | ND |
| 2020-03-31 | CA1910041_005_005-20200331NUL | ND |
| 2020-07-09 | CA1910041_007_007-202007090800 | ND |
| 2020-07-21 | CA1910041_002_002-202007210845 | ND |
| 2020-07-21 | CA1910041_001_001-202007210840 | ND |
| 2020-09-15 | CA1910041_005_005-202009150935 | ND |
| 2020-09-15 | CA1910041_002_002-202009150950 | ND |
| 2020-09-15 | CA1910041_004_004-202009150930 | ND |
| 2020-12-08 | CA1910041_009_009-202012080356 | ND |
| 2020-12-22 | CA1910041_002_002-202012220820 | ND |
| 2021-02-17 | CA1910041_002_002-202102170830 | ND |
| 2021-02-17 | CA1910041_001_001-202102170810 | ND |
| 2021-02-24 | CA1910041_005_005-202102240800 | ND |
| 2021-02-24 | CA1910041_007_007-202102240900 | ND |
| 2021-03-16 | CA1910041_001_001-202103160830 | ND |
| 2021-03-16 | CA1910041_007_007-202103160930 | ND |
| 2021-03-16 | CA1910041_005_005-202103160945 | ND |
| 2021-09-21 | CA1910041_004_004-202109210720 | ND |
| 2021-12-14 | CA1910041_002_002-202112140900 | ND |
| 2022-02-22 | CA1910041_001_001-202202220815 | ND |
| 2022-02-22 | CA1910041_002_002-202202220810 | ND |
| 2022-04-19 | CA1910041_005_005-202204190830 | ND |
| 2022-04-19 | CA1910041_007_007-202204191030 | ND |
| 2022-04-19 | CA1910041_004_004-202204190840 | ND |
| 2022-07-12 | CA1910041_002_002-202207120840 | ND |
| 2022-07-12 | CA1910041_001_001-202207120830 | ND |
| 2023-02-02 | CA1910041_009_009-202302021000 | ND |
| 2023-02-08 | CA1910041_002_002-202302080815 | ND |
| 2023-02-08 | CA1910041_001_001-202302080820 | ND |
| 2023-02-16 | CA1910041_005_005-202302160900 | ND |
| 2023-02-16 | CA1910041_004_004-202302160905 | ND |
| 2023-02-16 | CA1910041_007_007-202302160930 | ND |
| 2023-03-15 | CA1910041_001_001-202303150800 | ND |
| 2023-03-15 | CA1910041_005_005-202303150910 | ND |
| 2023-03-15 | CA1910041_002_002-202303150815 | ND |
| 2023-04-18 | CA1910041_004_004-202304180900 | ND |
| 2023-04-18 | CA1910041_007_007-202304180830 | ND |
| 2023-07-19 | CA1910041_009_009-202307191030 | ND |
| 2023-07-19 | CA1910041_001_001-202307190800 | ND |
| 2023-07-19 | CA1910041_005_005-202307191005 | ND |
| 2023-07-19 | CA1910041_007_007-202307191015 | ND |
| 2023-07-19 | CA1910041_002_002-202307190900 | ND |
| 2023-07-19 | CA1910041_004_004-202307191000 | ND |
| 2023-10-24 | CA1910041_009_009-202310240900 | ND |