Dibromochloromethane
Brunswick Consolidated Water District
Dibromochloromethane, one of the total trihalomethanes (TTHMs), is formed when chlorine or other disinfectants are used to treat drinking water. Dibromochloromethane and other disinfection byproducts increase the risk of cancer and may cause problems during pregnancy. Click here to read more about disinfection byproducts.
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 | 0.771 ppb | 17 | 10 | ND - 1.50 ppb |
| 2019 | 0.206 ppb | 16 | 3 | ND - 1.20 ppb |
| 2020 | 0.790 ppb | 12 | 8 | ND - 1.27 ppb |
| 2021 | 1.19 ppb | 16 | 14 | ND - 7.40 ppb |
| 2022 | 0.759 ppb | 10 | 10 | 0.650 ppb - 0.830 ppb |
| 2023 | 0.695 ppb | 18 | 17 | ND - 0.960 ppb |
ppb = parts per billion
State, National, and Health Guidelines for Drinking Water
EWG Health Guideline: 0.1 ppb
The EWG Health Guideline of 0.1 ppb for dibromochloromethane was based on the California Office of Environmental Health Hazard Assessment's public health goal, the level of a drinking water contaminant that does not pose a significant health risk. This health guideline protects against cancer and harm to fetal growth and development.
ppb = parts per billion
All test results
| Date | Lab ID | Result |
|---|---|---|
| 2018-03-19 | JH1801823 | 1.10 ppb |
| 2018-03-19 | JH1801821 | ND |
| 2018-03-19 | JH1801827 | ND |
| 2018-03-19 | JH1801825 | ND |
| 2018-06-20 | JH1804360 | 1.40 ppb |
| 2018-06-20 | JH1804356 | 1.40 ppb |
| 2018-06-20 | JH1804354 | 1.30 ppb |
| 2018-06-20 | JH1804359 | ND |
| 2018-06-20 | JH1804358 | ND |
| 2018-09-24 | JH1807796 | 1.50 ppb |
| 2018-09-24 | JH1807798 | 1.40 ppb |
| 2018-09-24 | JH1807795 | 1.40 ppb |
| 2018-09-24 | JH1807797 | 1.40 ppb |
| 2018-12-17 | JH1809926 | 1.20 ppb |
| 2018-12-17 | JH1809930 | ND |
| 2018-12-17 | JH1809932 | 1.000 ppb |
| 2018-12-17 | JH1809928 | ND |
| 2019-03-13 | JH1901565 | ND |
| 2019-03-13 | JH1901567 | ND |
| 2019-03-13 | JH1901568 | ND |
| 2019-03-13 | JH1901566 | ND |
| 2019-06-20 | JH1904009 | ND |
| 2019-06-20 | JH1904008 | 1.000 ppb |
| 2019-06-20 | JH1904007 | ND |
| 2019-06-20 | JH1904010 | ND |
| 2019-09-13 | JH1906810 | 1.10 ppb |
| 2019-09-13 | JH1906813 | ND |
| 2019-09-13 | JH1906811 | 1.20 ppb |
| 2019-09-13 | JH1906812 | ND |
| 2019-12-18 | JH1909071 | ND |
| 2019-12-18 | JH1909072-DBP | ND |
| 2019-12-18 | JH1909073 | ND |
| 2019-12-18 | JH1909074 | ND |
| 2020-03-10 | JH2001599 | ND |
| 2020-03-10 | JH2001598 | ND |
| 2020-03-10 | JH2001600 | ND |
| 2020-03-10 | JH2001601 | ND |
| 2020-09-15 | JH2007024 | 1.24 ppb |
| 2020-09-15 | JH2007028 | 1.18 ppb |
| 2020-09-15 | JH2007022 | 1.14 ppb |
| 2020-09-15 | JH2007026 | 1.27 ppb |
| 2020-12-07 | JH2009497 | 1.04 ppb |
| 2020-12-07 | JH2009495 | 1.23 ppb |
| 2020-12-07 | JH2009493 | 1.19 ppb |
| 2020-12-07 | JH2009491 | 1.19 ppb |
| 2021-03-03 | JH2101699 | 0.670 ppb |
| 2021-03-03 | JH2101697 | 0.950 ppb |
| 2021-03-03 | JH2101695 | ND |
| 2021-03-03 | JH2101693 | ND |
| 2021-06-08 | JH2104324 | 1.000 ppb |
| 2021-06-08 | JH2104328 | 1.000 ppb |
| 2021-06-08 | JH2104330 | 0.900 ppb |
| 2021-06-08 | JH2104326 | 1.20 ppb |
| 2021-09-16 | JH2108494 | 0.880 ppb |
| 2021-09-16 | JH2108492 | 0.850 ppb |
| 2021-09-16 | JH2108490 | 1.03 ppb |
| 2021-09-16 | JH2108488 | 0.810 ppb |
| 2021-12-02 | JH211862 | 0.650 ppb |
| 2021-12-02 | JH2110866 | 0.710 ppb |
| 2021-12-02 | JH2110864 | 7.40 ppb |
| 2021-12-02 | JH2110860 | 0.970 ppb |
| 2022-06-20 | JH2204747 | 0.740 ppb |
| 2022-06-20 | JH2204753 | 0.830 ppb |
| 2022-06-20 | JH2204745 | 0.780 ppb |
| 2022-06-20 | JH2204743 | 0.830 ppb |
| 2022-06-20 | JH2204751 | 0.790 ppb |
| 2022-06-20 | JH2204749 | 0.700 ppb |
| 2022-12-12 | JH2210524 | 0.650 ppb |
| 2022-12-12 | JH2210522 | 0.760 ppb |
| 2022-12-12 | JH2210518 | 0.770 ppb |
| 2022-12-12 | JH221520 | 0.740 ppb |
| 2023-03-20 | JH2302007 | 0.960 ppb |
| 2023-03-20 | JH2302013-THM | 0.610 ppb |
| 2023-03-20 | JH2302011 | 0.710 ppb |
| 2023-03-20 | JH2302009 | 0.660 ppb |
| 2023-04-13 | JH2304462 | 0.710 ppb |
| 2023-06-13 | JH2304464 | 0.840 ppb |
| 2023-06-13 | JH2304470 | 0.780 ppb |
| 2023-06-13 | JH2304472 | 0.750 ppb |
| 2023-06-13 | JH2304468 | 0.720 ppb |
| 2023-06-13 | JH2304466 | 0.740 ppb |
| 2023-09-06 | JH2307671 | 0.600 ppb |
| 2023-09-06 | JH2307675 | ND |
| 2023-09-06 | JH2307673 | 0.610 ppb |
| 2023-09-06 | JH2307677 | 0.580 ppb |
| 2023-12-04 | JH2310548 | 0.820 ppb |
| 2023-12-04 | JH2310550 | 0.830 ppb |
| 2023-12-04 | JH2310546 | 0.860 ppb |
| 2023-12-04 | JH2310544 | 0.730 ppb |