Bromochloromethane
Eastern Municipal Water District
NOTE: Eastern Municipal Water District purchases water from Metropolitan Water District of So. Cal. which is required to test for bromochloromethane. Sample information shown below was taken by Metropolitan Water District of So. Cal..
Bromochloromethane is a tap water disinfection byproduct; it is also used as an intermediate in chemical manufacturing and as a fire extinguishing agent. Disinfection byproducts in drinking water increase the risk of cancer.
Samples
Samples exceeding legal limit (MCL)
Samples exceeding
health guidelines
Testing results - average by year
| Year | Average result | Samples taken | Detections | Range of results |
|---|---|---|---|---|
| 2013 | ND | 35 | 0 | ND |
| 2014 | ND | 5 | 0 | ND |
| 2015 | N/A | 0 | 0 | N/A |
| 2016 | N/A | 0 | 0 | N/A |
| 2017 | N/A | 0 | 0 | N/A |
| 2018 | ND | 1 | 0 | ND |
| 2019 | ND | 4 | 0 | ND |
| 2020 | ND | 9 | 0 | ND |
| 2021 | ND | 5 | 0 | ND |
| 2022 | ND | 5 | 0 | ND |
| 2023 | ND | 7 | 0 | ND |
ppb = parts per billion
State, National, and Health Guidelines for Drinking Water
EWG Health Guideline: 0.06 ppb
The EWG Health Guideline of 0.06 ppb for bromochloromethane 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, harm to reproduction and child development, and change to fetal growth and development.
ppb = parts per billion
All test results
NOTE: Eastern Municipal Water District purchases water from Metropolitan Water District of So. Cal. which is required to test for bromochloromethane. Sample information shown below was taken by Metropolitan Water District of So. Cal..
| Date | Lab ID | Result |
|---|---|---|
| 2018-10-02 | CA1910087_020_020-201810021020 | ND |
| 2018-10-02 | CA1910087_003_003-201810021046 | ND |
| 2018-10-02 | CA1910087_005_005-201810020742 | ND |
| 2018-10-02 | CA1910087_026_026-201810020950 | ND |
| 2018-10-02 | CA1910087_013_013-201810021010 | ND |
| 2019-01-02 | CA1910087_020_020-201901021040 | ND |
| 2019-01-02 | CA1910087_003_003-201901020910 | ND |
| 2019-01-02 | CA1910087_005_005-201901020715 | ND |
| 2019-01-02 | CA1910087_026_026-201901020737 | ND |
| 2019-01-14 | CA1910087_013_013-201901140825 | ND |
| 2019-10-21 | CA1910087_005_005-201910210745 | ND |
| 2019-10-22 | CA1910087_020_020-201910221315 | ND |
| 2020-01-07 | CA1910087_005_005-202001070758 | ND |
| 2020-01-07 | CA1910087_020_020-202001071025 | ND |
| 2020-01-07 | CA1910087_013_013-202001071020 | ND |
| 2020-01-07 | CA1910087_003_003-202001070740 | ND |
| 2020-01-07 | CA1910087_026_026-202001071042 | ND |
| 2020-07-07 | CA1910087_005_005-202007070816 | ND |
| 2020-07-07 | CA1910087_003_003-202007070740 | ND |
| 2020-07-07 | CA1910087_020_020-202007070930 | ND |
| 2020-07-07 | CA1910087_013_013-202007070750 | ND |
| 2021-04-06 | CA1910087_003_003-202104060702 | ND |
| 2021-04-06 | CA1910087_013_013-202104060910 | ND |
| 2021-04-06 | CA1910087_005_005-202104060750 | ND |
| 2021-04-06 | CA1910087_020_020-202104061020 | ND |
| 2021-04-06 | CA1910087_026_026-202104061119 | ND |
| 2022-07-05 | CA1910087_026_026-202207050950 | ND |
| 2022-07-05 | CA1910087_005_005-202207050709 | ND |
| 2022-07-05 | CA1910087_013_013-202207050645 | ND |
| 2022-07-05 | CA1910087_020_020-202207051000 | ND |
| 2022-07-05 | CA1910087_003_003-202207050650 | ND |
| 2023-10-03 | CA1910087_020_020-202310031010 | ND |
| 2023-10-03 | CA1910087_026_026-202310031106 | ND |
| 2023-10-03 | CA1910087_003_003-202310030905 | ND |
| 2023-10-03 | CA1910087_005_005-202310030801 | ND |
| 2023-10-03 | CA1910087_013_013-202310030730 | ND |