Dibromochloromethane
Eau Claire Waterworks
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 |
---|---|---|---|---|
2013 | N/A | 0 | 0 | N/A |
2014 | 0.117 ppb | 3 | 2 | ND - 0.180 ppb |
2015 | ND | 3 | 0 | ND |
2016 | 0.0380 ppb | 5 | 1 | ND - 0.190 ppb |
2017 | 0.503 ppb | 6 | 4 | ND - 1.30 ppb |
2018 | 0.157 ppb | 6 | 3 | ND - 0.470 ppb |
2019 | 0.522 ppb | 5 | 4 | ND - 1.10 ppb |
ppb = parts per billion
State and national drinking water standards and health guidelines
EWG Health Guideline 0.1 ppb
The EWG Health Guideline of 0.1 ppb for dibromochloromethane 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 |
---|---|---|
2014-07-21 | 804373 | 0.170 ppb |
2014-07-21 | 804374 | 0.180 ppb |
2014-07-21 | 804376 | ND |
2015-07-16 | 871767 | ND |
2015-07-16 | 871770 | ND |
2015-07-16 | 871769 | ND |
2016-07-26 | 935390 | ND |
2016-07-26 | 935393 | 0.190 ppb |
2016-07-26 | 935392 | ND |
2016-09-01 | 942711 | ND |
2016-11-03 | 957173 | ND |
2017-02-21 | 974479 | 0.190 ppb |
2017-05-09 | 987395 | ND |
2017-07-11 | 1002950 | ND |
2017-07-11 | 1002953 | 1.30 ppb |
2017-07-11 | 1002952 | 1.30 ppb |
2017-10-24 | 1026050 | 0.230 ppb |
2018-03-14 | 1045099 | ND |
2018-05-08 | 1054395 | ND |
2018-08-29 | 1077023 | ND |
2018-08-29 | 1077025 | 0.470 ppb |
2018-09-19 | 1082009 | 0.270 ppb |
2018-12-12 | 1097339 | 0.200 ppb |
2019-02-13 | 1104865 | 0.640 ppb |
2019-04-22 | 1116666 | 0.340 ppb |
2019-07-16 | 1134673 | ND |
2019-07-16 | 1134672 | 0.530 ppb |
2019-07-16 | 1134671 | 1.10 ppb |