Dibromochloromethane
City of Puyallup
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 | 0.401 ppb | 33 | 15 | ND - 1.70 ppb |
| 2019 | 0.556 ppb | 20 | 11 | ND - 1.35 ppb |
| 2020 | N/A | 0 | 0 | N/A |
| 2021 | 0.591 ppb | 8 | 6 | ND - 1.15 ppb |
| 2022 | 0.668 ppb | 9 | 5 | ND - 1.46 ppb |
| 2023 | 0.763 ppb | 9 | 7 | ND - 1.59 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 |
|---|---|---|
| 2018-02-06 | 0.500 ppb | |
| 2018-02-06 | ND | |
| 2018-02-06 | 0.700 ppb | |
| 2018-02-06 | 1.40 ppb | |
| 2018-02-06 | 1.40 ppb | |
| 2018-02-06 | 1.30 ppb | |
| 2018-02-06 | ND | |
| 2018-02-06 | ND | |
| 2018-05-03 | ND | |
| 2018-05-03 | 0.600 ppb | |
| 2018-05-03 | ND | |
| 2018-05-03 | ND | |
| 2018-05-03 | ND | |
| 2018-05-03 | 0.900 ppb | |
| 2018-05-03 | 1.000 ppb | |
| 2018-05-03 | 1.70 ppb | |
| 2018-07-31 | ND | |
| 2018-08-07 | ND | |
| 2018-08-07 | 0.500 ppb | |
| 2018-08-07 | 0.510 ppb | |
| 2018-08-07 | 0.620 ppb | |
| 2018-08-07 | ND | |
| 2018-08-07 | ND | |
| 2018-08-07 | ND | |
| 2018-08-07 | ND | |
| 2018-11-27 | ND | |
| 2018-11-27 | 0.710 ppb | |
| 2018-11-27 | ND | |
| 2018-11-27 | ND | |
| 2018-11-27 | ND | |
| 2018-11-27 | ND | |
| 2018-11-27 | 0.580 ppb | |
| 2018-11-27 | 0.820 ppb | |
| 2019-02-05 | ND | |
| 2019-02-05 | ND | |
| 2019-02-05 | 1.05 ppb | |
| 2019-02-05 | 0.790 ppb | |
| 2019-02-05 | 1.03 ppb | |
| 2019-02-05 | ND | |
| 2019-02-05 | ND | |
| 2019-02-05 | ND | |
| 2019-05-09 | ND | |
| 2019-05-09 | 1.32 ppb | |
| 2019-05-09 | 0.750 ppb | |
| 2019-05-09 | ND | |
| 2019-05-09 | 0.950 ppb | |
| 2019-05-09 | ND | |
| 2019-05-09 | 0.980 ppb | |
| 2019-05-09 | 1.35 ppb | |
| 2019-08-01 | 0.730 ppb | |
| 2019-08-01 | 0.910 ppb | |
| 2019-11-06 | 1.25 ppb | |
| 2019-11-06 | ND | |
| 2021-02-04 | 4073727 | 0.610 ppb |
| 2021-02-04 | 4073726 | 0.600 ppb |
| 2021-04-29 | 4109475 | 0.850 ppb |
| 2021-04-29 | 4109476 | ND |
| 2021-08-05 | 4163445 | 0.950 ppb |
| 2021-08-05 | 4163446 | 0.570 ppb |
| 2021-11-12 | 4207535 | ND |
| 2021-11-12 | 4207531 | 1.15 ppb |
| 2022-02-01 | 4241802 | 1.29 ppb |
| 2022-02-01 | 4241801 | ND |
| 2022-05-10 | 4286827 | ND |
| 2022-05-10 | 4286826 | 1.46 ppb |
| 2022-07-13 | 4318713 | ND |
| 2022-08-11 | 4363953 | 0.990 ppb |
| 2022-08-11 | 4363955 | ND |
| 2022-11-03 | 4424241 | 0.920 ppb |
| 2022-11-03 | 4424237 | 1.35 ppb |
| 2023-02-01 | 4411906 | 0.500 ppb |
| 2023-02-01 | 4411905 | 1.000 ppb |
| 2023-05-02 | 4452799 | 1.59 ppb |
| 2023-05-02 | 4452798 | ND |
| 2023-08-02 | 4505783 | 0.680 ppb |
| 2023-08-02 | 4505780 | 1.04 ppb |
| 2023-10-30 | 4549130 | ND |
| 2023-11-02 | 4548849 | 0.680 ppb |
| 2023-11-02 | 4548850 | 1.38 ppb |