Bromodichloromethane
Canton
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 |
|---|---|---|---|---|
| 2014 | 0.405 ppb | 14 | 9 | ND - 0.726 ppb |
| 2015 | 0.635 ppb | 8 | 8 | 0.536 ppb - 0.720 ppb |
| 2016 | ND | 8 | 0 | ND |
| 2017 | 0.164 ppb | 8 | 2 | ND - 0.668 ppb |
| 2018 | 0.0865 ppb | 8 | 1 | ND - 0.692 ppb |
| 2019 | 1.08 ppb | 8 | 8 | 0.583 ppb - 1.58 ppb |
ppb = parts per billion
State and national drinking water standards and health guidelines
EWG Health Guideline 0.06 ppb
The EWG Health Guideline of 0.06 ppb for bromodichloromethane was proposed in 2018 by the California Office of Environmental Health Hazard Assessment as a one-in-a-million lifetime risk of cancer. Values greater than one-in-a-million cancer risk level can result in increased cancer cases above one in a million people.
ppb = parts per billion
All test results
| Date | Lab ID | Result |
|---|---|---|
| 2014-03-10 | 4031094-01 | ND |
| 2014-03-10 | 4031094-02 | ND |
| 2014-03-10 | 4031094-04 | ND |
| 2014-03-10 | 4031094-03 | ND |
| 2014-06-23 | 4063274-01 | 0.670 ppb |
| 2014-06-23 | 4063274-04 | 0.570 ppb |
| 2014-06-23 | 4063274-03 | 0.603 ppb |
| 2014-06-23 | 4063274-02 | 0.612 ppb |
| 2014-09-08 | 4091065-02 | 0.699 ppb |
| 2014-09-08 | 4091065-03 | 0.726 ppb |
| 2014-09-08 | 4091065-01 | 0.630 ppb |
| 2014-09-08 | 4091065-04 | 0.631 ppb |
| 2014-12-03 | 4120529-01 | ND |
| 2014-12-03 | 4120529-02 | 0.533 ppb |
| 2015-03-18 | 5032515-01 | 0.562 ppb |
| 2015-03-18 | 5032515-02 | 0.536 ppb |
| 2015-06-03 | 5060627-01 | 0.587 ppb |
| 2015-06-03 | 5060627-02 | 0.652 ppb |
| 2015-09-17 | 5092836-01 | 0.689 ppb |
| 2015-09-17 | 5092836-02 | 0.720 ppb |
| 2015-12-10 | 5121873-01 | 0.651 ppb |
| 2015-12-10 | 5121873-02 | 0.688 ppb |
| 2016-03-09 | 6031469-01 | ND |
| 2016-03-09 | 6031469-02 | ND |
| 2016-06-09 | 6061596-01 | ND |
| 2016-06-09 | 6061596-02 | ND |
| 2016-09-08 | 6091139-01 | ND |
| 2016-09-08 | 6091139-02 | ND |
| 2016-12-08 | 6121382-01 | ND |
| 2016-12-08 | 6121382-02 | ND |
| 2017-03-14 | 7031953-01 | ND |
| 2017-03-14 | 7031953-02 | ND |
| 2017-06-13 | 7062295-01 | ND |
| 2017-06-13 | 7062295-02 | ND |
| 2017-09-13 | 7092258-01 | 0.640 ppb |
| 2017-09-13 | 7092258-02 | 0.668 ppb |
| 2017-12-21 | 7123713-02 | ND |
| 2017-12-21 | 7123713-01 | ND |
| 2018-03-14 | 8032345-02 | ND |
| 2018-03-14 | 8032345-01 | ND |
| 2018-06-13 | 8062344-01 | ND |
| 2018-06-13 | 8062344-02 | ND |
| 2018-09-18 | 8093059-01 | ND |
| 2018-09-18 | 8093059-02 | ND |
| 2018-12-19 | 8123542-01 | ND |
| 2018-12-19 | 8123542-02 | 0.692 ppb |
| 2019-03-14 | 9032514-01 | 0.866 ppb |
| 2019-03-14 | 9032514-02 | 0.583 ppb |
| 2019-06-06 | 9061256-01 | 1.13 ppb |
| 2019-06-06 | 9061256-02 | 0.880 ppb |
| 2019-09-19 | 9093877-01 | 1.58 ppb |
| 2019-09-19 | 9093877-02 | 1.41 ppb |
| 2019-12-19 | 9123961-02 | 1.14 ppb |
| 2019-12-19 | 9123961-01 | 1.03 ppb |