Bromodichloromethane
City of McPherson
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 | 0.465 ppb | 16 | 8 | ND - 1.40 ppb |
| 2015 | 0.259 ppb | 16 | 6 | ND - 1.000 ppb |
| 2016 | 0.505 ppb | 12 | 6 | ND - 1.60 ppb |
| 2017 | 0.485 ppb | 2 | 1 | ND - 0.970 ppb |
| 2018 | 0.365 ppb | 2 | 1 | ND - 0.730 ppb |
| 2019 | 0.355 ppb | 2 | 1 | ND - 0.710 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 |
|---|---|---|
| 2014-02-10 | 60166 | ND |
| 2014-02-10 | 60165 | ND |
| 2014-02-10 | 60164 | ND |
| 2014-02-10 | 60163 | 1.07 ppb |
| 2014-05-05 | 109792 | ND |
| 2014-05-05 | 109791 | ND |
| 2014-05-05 | 109790 | ND |
| 2014-05-05 | 109789 | ND |
| 2014-08-11 | 171188 | ND |
| 2014-08-11 | 171189 | 1.30 ppb |
| 2014-08-11 | 171190 | 0.970 ppb |
| 2014-08-11 | 171191 | 0.600 ppb |
| 2014-11-17 | 232927 | 0.620 ppb |
| 2014-11-17 | 232926 | 1.40 ppb |
| 2014-11-17 | 232925 | 0.610 ppb |
| 2014-11-17 | 232924 | 0.870 ppb |
| 2015-02-09 | 277252 | ND |
| 2015-02-09 | 277251 | 1.000 ppb |
| 2015-02-09 | 277250 | ND |
| 2015-02-09 | 277249 | ND |
| 2015-05-04 | 328656 | ND |
| 2015-05-04 | 328655 | 0.610 ppb |
| 2015-05-04 | 328654 | ND |
| 2015-05-04 | 328653 | ND |
| 2015-08-10 | 385792 | ND |
| 2015-08-10 | 385791 | ND |
| 2015-08-10 | 385790 | 0.580 ppb |
| 2015-08-10 | 385789 | ND |
| 2015-11-16 | 427909 | 0.500 ppb |
| 2015-11-16 | 427908 | 0.880 ppb |
| 2015-11-16 | 427907 | ND |
| 2015-11-16 | 427906 | 0.580 ppb |
| 2016-02-22 | 497253 | ND |
| 2016-02-22 | 497252 | 0.680 ppb |
| 2016-02-22 | 497251 | 1.60 ppb |
| 2016-02-22 | 497250 | ND |
| 2016-05-16 | 547717 | ND |
| 2016-05-16 | 547714 | 1.000 ppb |
| 2016-05-16 | 547715 | ND |
| 2016-05-16 | 547716 | 0.770 ppb |
| 2016-08-15 | 604071 | ND |
| 2016-08-15 | 604070 | 1.10 ppb |
| 2016-08-15 | 604069 | 0.910 ppb |
| 2016-08-15 | 604068 | ND |
| 2017-08-21 | 823964 | ND |
| 2017-08-21 | 823963 | 0.970 ppb |
| 2018-08-13 | 1025427 | ND |
| 2018-08-13 | 1025426 | 0.730 ppb |
| 2019-08-12 | 1222732 | 0.710 ppb |
| 2019-08-12 | 1222733 | ND |