Know Your Environment. Protect Your Health.

Dibromochloromethane

Colville Water Department

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.

 

18

Samples

0

Samples exceeding legal limit (MCL)

11

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20181.42 ppb220.880 ppb - 1.96 ppb
20190.757 ppb32ND - 1.62 ppb
2020N/A00N/A
20211.38 ppb220.820 ppb - 1.93 ppb
20221.19 ppb43ND - 2.35 ppb
20230.387 ppb72ND - 2.05 ppb

ppb = parts per billion

State, National, and Health Guidelines for Drinking Water

EWG Health Guideline: 0.1 ppb

The EWG Health Guideline of 0.1 ppb for dibromochloromethane 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
2018-08-270.880 ppb
2018-08-271.96 ppb
2019-08-280.650 ppb
2019-08-281.62 ppb
2019-09-23ND
2021-08-2641742191.93 ppb
2021-08-2641742180.820 ppb
2022-08-0243286521.59 ppb
2022-12-1243851350.800 ppb
2022-12-1243851342.35 ppb
2022-12-124385131ND
2023-03-234429205ND
2023-06-224480388ND
2023-08-2345428940.660 ppb
2023-08-2345428952.05 ppb
2023-09-284542957ND
2023-10-264575180ND
2023-10-264539606ND