Dibromochloromethane
Fitchburg Utility District 1
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.
Testing results - average by year
Year | Average result | Samples taken | Detections | Range of results |
---|---|---|---|---|
2013 | N/A | 0 | 0 | N/A |
2014 | 0.0600 ppb | 6 | 1 | ND - 0.360 ppb |
2015 | ND | 6 | 0 | ND |
2016 | 0.115 ppb | 6 | 2 | ND - 0.380 ppb |
2017 | 0.205 ppb | 6 | 2 | ND - 0.840 ppb |
2018 | 0.180 ppb | 3 | 1 | ND - 0.540 ppb |
2019 | 0.590 ppb | 3 | 2 | ND - 1.40 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 |
---|---|---|
2014-03-04 | 121708001 | ND |
2014-08-19 | 152081001 | ND |
2014-08-19 | 152086001 | ND |
2014-08-19 | 152071001 | ND |
2014-08-19 | 152068001 | ND |
2014-08-19 | 152080001 | 0.360 ppb |
2015-07-30 | 35199919001-1 | ND |
2015-07-30 | 35199919002-1 | ND |
2015-07-30 | 35199919003-1 | ND |
2015-07-30 | 35199919004-2 | ND |
2015-07-30 | 35199919005-2 | ND |
2015-09-09 | 35206535001-1 | ND |
2016-08-17 | 939984 | ND |
2016-08-17 | 939986 | 0.380 ppb |
2016-08-17 | 939985 | 0.310 ppb |
2016-08-17 | 939982 | ND |
2016-08-17 | 939980 | ND |
2016-08-17 | 939978 | ND |
2017-07-19 | 1005313 | ND |
2017-07-19 | 1005316 | ND |
2017-07-19 | 1005319 | ND |
2017-07-19 | 1005322 | ND |
2017-07-19 | 1005324 | 0.390 ppb |
2017-07-19 | 1005325 | 0.840 ppb |
2018-07-26 | 1069933 | ND |
2018-07-26 | 1069936 | ND |
2018-07-26 | 1069937 | 0.540 ppb |
2019-07-24 | 1136903 | ND |
2019-07-24 | 1136906 | 0.370 ppb |
2019-07-24 | 1136907 | 1.40 ppb |