Bromodichloromethane
Skagit County Public Utility District 1 Judy Reservoir
Bromodichloromethane, one of the total trihalomethanes (TTHMs), is formed when chlorine or other disinfectants are used to treat drinking water. Bromodichloromethane 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 | 0.834 ppb | 32 | 32 | 0.600 ppb - 1.10 ppb |
| 2019 | 0.803 ppb | 32 | 32 | 0.500 ppb - 1.10 ppb |
| 2020 | N/A | 0 | 0 | N/A |
| 2021 | 0.975 ppb | 32 | 32 | 0.700 ppb - 1.50 ppb |
| 2022 | 0.828 ppb | 32 | 32 | 0.510 ppb - 1.10 ppb |
| 2023 | 0.750 ppb | 33 | 33 | 0.520 ppb - 1.10 ppb |
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 bromodichloromethane 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 |
|---|---|---|
| 2018-01-29 | 0.800 ppb | |
| 2018-01-29 | 0.900 ppb | |
| 2018-01-29 | 0.800 ppb | |
| 2018-01-29 | 0.900 ppb | |
| 2018-01-30 | 1.000 ppb | |
| 2018-01-30 | 0.800 ppb | |
| 2018-01-30 | 0.700 ppb | |
| 2018-01-30 | 0.900 ppb | |
| 2018-04-23 | 0.900 ppb | |
| 2018-04-23 | 0.800 ppb | |
| 2018-04-23 | 0.900 ppb | |
| 2018-04-23 | 0.700 ppb | |
| 2018-04-23 | 0.800 ppb | |
| 2018-04-24 | 0.800 ppb | |
| 2018-04-24 | 1.000 ppb | |
| 2018-04-24 | 0.900 ppb | |
| 2018-07-23 | 1.10 ppb | |
| 2018-07-23 | 1.000 ppb | |
| 2018-07-23 | 1.000 ppb | |
| 2018-07-23 | 1.000 ppb | |
| 2018-07-24 | 1.10 ppb | |
| 2018-07-24 | 1.000 ppb | |
| 2018-07-24 | 1.000 ppb | |
| 2018-07-24 | 1.000 ppb | |
| 2018-10-22 | 0.700 ppb | |
| 2018-10-22 | 0.600 ppb | |
| 2018-10-22 | 0.600 ppb | |
| 2018-10-22 | 0.600 ppb | |
| 2018-10-22 | 0.600 ppb | |
| 2018-10-22 | 0.600 ppb | |
| 2018-10-22 | 0.600 ppb | |
| 2018-10-22 | 0.600 ppb | |
| 2019-01-28 | 0.800 ppb | |
| 2019-01-28 | 0.700 ppb | |
| 2019-01-28 | 0.800 ppb | |
| 2019-01-28 | 0.800 ppb | |
| 2019-01-29 | 0.800 ppb | |
| 2019-01-29 | 0.900 ppb | |
| 2019-01-29 | 0.800 ppb | |
| 2019-01-29 | 0.800 ppb | |
| 2019-04-25 | 1.10 ppb | |
| 2019-04-25 | 1.000 ppb | |
| 2019-04-25 | 1.000 ppb | |
| 2019-04-25 | 1.10 ppb | |
| 2019-04-25 | 1.000 ppb | |
| 2019-04-29 | 1.10 ppb | |
| 2019-04-30 | 1.000 ppb | |
| 2019-04-30 | 1.10 ppb | |
| 2019-07-29 | 0.800 ppb | |
| 2019-07-29 | 0.800 ppb | |
| 2019-07-29 | 0.800 ppb | |
| 2019-07-29 | 0.800 ppb | |
| 2019-07-30 | 0.800 ppb | |
| 2019-07-30 | 0.800 ppb | |
| 2019-07-30 | 0.800 ppb | |
| 2019-07-31 | 0.800 ppb | |
| 2019-10-28 | 0.500 ppb | |
| 2019-10-28 | 0.500 ppb | |
| 2019-10-28 | 0.500 ppb | |
| 2019-10-28 | 0.700 ppb | |
| 2019-10-28 | 0.700 ppb | |
| 2019-10-28 | 0.500 ppb | |
| 2019-10-28 | 0.500 ppb | |
| 2019-10-28 | 0.600 ppb | |
| 2021-01-25 | 4073721 | 0.800 ppb |
| 2021-01-25 | 4073709 | 0.700 ppb |
| 2021-01-25 | 4073723 | 0.700 ppb |
| 2021-01-25 | 4073713 | 0.800 ppb |
| 2021-01-25 | 4073711 | 0.800 ppb |
| 2021-01-25 | 4073719 | 0.700 ppb |
| 2021-01-25 | 4073715 | 0.700 ppb |
| 2021-01-25 | 4073717 | 0.700 ppb |
| 2021-04-26 | 4112931 | 1.10 ppb |
| 2021-04-26 | 4112899 | 1.10 ppb |
| 2021-04-26 | 4112929 | 1.000 ppb |
| 2021-04-26 | 4112933 | 1.000 ppb |
| 2021-04-26 | 4112927 | 1.10 ppb |
| 2021-04-26 | 4112937 | 1.10 ppb |
| 2021-04-26 | 4112935 | 1.000 ppb |
| 2021-04-26 | 4112901 | 1.000 ppb |
| 2021-07-26 | 4149008 | 1.10 ppb |
| 2021-07-26 | 4149006 | 1.20 ppb |
| 2021-07-26 | 4149004 | 1.30 ppb |
| 2021-07-26 | 4149010 | 1.50 ppb |
| 2021-07-26 | 4149014 | 1.40 ppb |
| 2021-07-26 | 4149012 | 1.40 ppb |
| 2021-07-26 | 4149000 | 1.20 ppb |
| 2021-07-26 | 4149002 | 1.40 ppb |
| 2021-10-18 | 4197738 | 0.800 ppb |
| 2021-10-18 | 4197724 | 0.800 ppb |
| 2021-10-18 | 4197728 | 0.800 ppb |
| 2021-10-18 | 4197732 | 0.800 ppb |
| 2021-10-18 | 4197726 | 0.800 ppb |
| 2021-10-18 | 4197730 | 0.800 ppb |
| 2021-10-18 | 4197734 | 0.800 ppb |
| 2021-10-18 | 4197736 | 0.800 ppb |
| 2022-01-24 | 4240278 | 0.510 ppb |
| 2022-01-24 | 4240279 | 0.640 ppb |
| 2022-01-24 | 4240281 | 0.530 ppb |
| 2022-01-24 | 4240276 | 0.620 ppb |
| 2022-01-24 | 4240275 | 0.560 ppb |
| 2022-01-24 | 4240277 | 0.560 ppb |
| 2022-01-24 | 4240280 | 0.530 ppb |
| 2022-01-24 | 4240282 | 0.550 ppb |
| 2022-04-25 | 4289388 | 0.760 ppb |
| 2022-04-25 | 4289392 | 0.790 ppb |
| 2022-04-25 | 4289391 | 0.850 ppb |
| 2022-04-25 | 4289390 | 0.800 ppb |
| 2022-04-25 | 4289387 | 0.940 ppb |
| 2022-04-25 | 4289393 | 0.790 ppb |
| 2022-04-25 | 4289389 | 0.750 ppb |
| 2022-04-25 | 4289386 | 0.790 ppb |
| 2022-08-02 | 4335109 | 1.10 ppb |
| 2022-08-02 | 4335107 | 0.990 ppb |
| 2022-08-02 | 4335114 | 0.990 ppb |
| 2022-08-02 | 4335108 | 0.810 ppb |
| 2022-08-02 | 4335113 | 0.940 ppb |
| 2022-08-02 | 4335111 | 0.860 ppb |
| 2022-08-02 | 4335110 | 0.940 ppb |
| 2022-08-02 | 4335112 | 1.10 ppb |
| 2022-10-24 | 4380334 | 1.000 ppb |
| 2022-10-24 | 4380336 | 1.000 ppb |
| 2022-10-24 | 4380341 | 1.10 ppb |
| 2022-10-24 | 4380339 | 0.950 ppb |
| 2022-10-24 | 4380335 | 0.780 ppb |
| 2022-10-24 | 4380333 | 0.890 ppb |
| 2022-10-24 | 4380332 | 0.990 ppb |
| 2022-10-24 | 4380343 | 1.10 ppb |
| 2023-01-23 | 4403846 | 0.530 ppb |
| 2023-01-23 | 4403844 | 0.700 ppb |
| 2023-01-23 | 4403851 | 0.530 ppb |
| 2023-01-23 | 4403849 | 0.520 ppb |
| 2023-01-23 | 4403847 | 0.530 ppb |
| 2023-01-23 | 4403845 | 0.540 ppb |
| 2023-01-23 | 4403848 | 0.650 ppb |
| 2023-01-23 | 4403850 | 0.540 ppb |
| 2023-04-24 | 4502405 | 1.10 ppb |
| 2023-04-24 | 4502403 | 1.10 ppb |
| 2023-04-24 | 4502408 | 1.000 ppb |
| 2023-04-24 | 4502401 | 1.000 ppb |
| 2023-04-24 | 4502406 | 1.000 ppb |
| 2023-04-24 | 4502407 | 0.940 ppb |
| 2023-04-24 | 4502404 | 0.990 ppb |
| 2023-04-24 | 4502402 | 1.10 ppb |
| 2023-07-27 | 4529678 | 0.650 ppb |
| 2023-07-27 | 4529676 | 0.670 ppb |
| 2023-07-27 | 4529672 | 0.600 ppb |
| 2023-07-27 | 4529674 | 0.600 ppb |
| 2023-07-27 | 4529673 | 0.610 ppb |
| 2023-07-27 | 4529675 | 0.660 ppb |
| 2023-07-27 | 4529671 | 0.680 ppb |
| 2023-07-27 | 4529677 | 0.660 ppb |
| 2023-08-10 | 4509878 | 0.710 ppb |
| 2023-10-23 | 4541723 | 0.810 ppb |
| 2023-10-23 | 4541726 | 0.790 ppb |
| 2023-10-23 | 4541725 | 0.800 ppb |
| 2023-10-23 | 4541724 | 0.800 ppb |
| 2023-10-23 | 4541722 | 0.770 ppb |
| 2023-10-23 | 4541720 | 0.670 ppb |
| 2023-10-23 | 4541719 | 0.710 ppb |
| 2023-10-23 | 4541721 | 0.800 ppb |