Bromodichloromethane
Tensas Water District Association
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 | 0.875 ppb | 16 | 10 | ND - 2.30 ppb |
| 2019 | 3.54 ppb | 16 | 4 | ND - 27.0 ppb |
| 2020 | 0.939 ppb | 8 | 6 | ND - 2.00 ppb |
| 2021 | 1.41 ppb | 9 | 7 | ND - 6.20 ppb |
| 2022 | 1.40 ppb | 8 | 8 | 0.760 ppb - 2.00 ppb |
| 2023 | 0.849 ppb | 8 | 7 | ND - 1.80 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 |
|---|---|---|
| 2018-02-07 | 35374043001 | 0.670 ppb |
| 2018-02-07 | 35374043002 | 0.630 ppb |
| 2018-02-07 | 35374043002 | 0.630 ppb |
| 2018-02-07 | 35374043001 | 0.670 ppb |
| 2018-05-21 | 35393926002 | 1.30 ppb |
| 2018-05-21 | 35393926001 | ND |
| 2018-05-21 | 35393926002 | 1.30 ppb |
| 2018-05-21 | 35393926001 | ND |
| 2018-08-01 | 35408783001 | 2.30 ppb |
| 2018-08-01 | 35408783002 | 2.10 ppb |
| 2018-08-01 | 35408783001 | 2.30 ppb |
| 2018-08-01 | 35408783002 | 2.10 ppb |
| 2018-11-07 | 35430449001 | ND |
| 2018-11-07 | 35430449001 | ND |
| 2018-11-07 | 35430449002 | ND |
| 2018-11-07 | 35430449002 | ND |
| 2019-02-11 | 35448426001 | ND |
| 2019-02-11 | 35448426002 | 27.0 ppb |
| 2019-02-11 | 35448426001 | ND |
| 2019-02-11 | 35448426002 | 27.0 ppb |
| 2019-05-01 | 35465888001 | ND |
| 2019-05-01 | 35465888002 | ND |
| 2019-05-01 | 35465888001 | ND |
| 2019-05-01 | 35465888002 | ND |
| 2019-08-01 | 35487179002 | ND |
| 2019-08-01 | 35487179001 | 1.30 ppb |
| 2019-08-01 | 35487179001 | 1.30 ppb |
| 2019-08-01 | 35487179002 | ND |
| 2019-11-04 | 35510961001 | ND |
| 2019-11-04 | 35510961002 | ND |
| 2019-11-04 | 35510961002 | ND |
| 2019-11-04 | 35510961001 | ND |
| 2020-02-03 | 35528923002 | ND |
| 2020-02-03 | 35528923001 | ND |
| 2020-05-04 | 35548676001 | 0.660 ppb |
| 2020-05-04 | 35548676002 | 0.950 ppb |
| 2020-08-03 | 35568795001 | 1.10 ppb |
| 2020-08-03 | 35568795002 | 1.40 ppb |
| 2020-11-19 | 35594072001 | 1.40 ppb |
| 2020-11-19 | 35594072002 | 2.00 ppb |
| 2021-02-26 | 35615718001 | 0.570 ppb |
| 2021-02-26 | 35615718002 | 0.590 ppb |
| 2021-05-21 | 35636229001 | ND |
| 2021-05-21 | 35636229002 | ND |
| 2021-05-27 | 35637041001 | 6.20 ppb |
| 2021-08-03 | 35654135001 | 1.000 ppb |
| 2021-08-03 | 35654135002 | 1.50 ppb |
| 2021-11-10 | 35678862001 | 1.30 ppb |
| 2021-11-10 | 35678862002 | 1.50 ppb |
| 2022-02-15 | 35698461002 | 1.80 ppb |
| 2022-02-15 | 35698461001 | 2.00 ppb |
| 2022-05-02 | 35716255002 | 1.60 ppb |
| 2022-05-02 | 35716255001 | 1.90 ppb |
| 2022-08-01 | 35737785001 | 0.910 ppb |
| 2022-08-01 | 35737785002 | 1.10 ppb |
| 2022-11-14 | 35761585001 | 0.760 ppb |
| 2022-11-14 | 35761585002 | 1.10 ppb |
| 2023-02-05 | 35779274001 | 0.600 ppb |
| 2023-02-05 | 35779274002 | 0.910 ppb |
| 2023-05-01 | 35797766001 | 0.620 ppb |
| 2023-05-01 | 35797766002 | 0.790 ppb |
| 2023-08-14 | 35822627001 | 0.870 ppb |
| 2023-08-14 | 35822627002 | ND |
| 2023-11-06 | 35841766001 | 1.20 ppb |
| 2023-11-06 | 35841766002 | 1.80 ppb |