Know Your Environment. Protect Your Health.

Dibromochloromethane

Hillsboro

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.

 

45

Samples

0

Samples exceeding legal limit (MCL)

39

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20180.740 ppb87ND - 1.20 ppb
20191.31 ppb85ND - 3.08 ppb
20200.912 ppb53ND - 2.35 ppb
20211.23 ppb880.637 ppb - 1.52 ppb
20221.37 ppb880.942 ppb - 1.70 ppb
20231.55 ppb880.704 ppb - 2.11 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
2018-02-128021823-010.725 ppb
2018-02-128021823-020.856 ppb
2018-05-228054285-011.03 ppb
2018-05-228054285-021.20 ppb
2018-08-288085658-010.717 ppb
2018-08-288085658-020.841 ppb
2018-11-208113874-02ND
2018-11-208113874-010.547 ppb
2019-02-199023190-01ND
2019-02-199023190-02ND
2019-05-079051916-01ND
2019-05-079051916-020.555 ppb
2019-08-289086029-022.84 ppb
2019-08-289086029-013.08 ppb
2019-11-199113363-011.97 ppb
2019-11-199113363-022.07 ppb
2020-02-250024233-01ND
2020-02-250024233-02ND
2020-05-190053707-021.09 ppb
2020-05-190053707-011.12 ppb
2020-11-170113105-022.35 ppb
2021-02-24EB04154-021.42 ppb
2021-02-24EB04154-011.24 ppb
2021-05-18EE03565-011.44 ppb
2021-05-18EE03565-021.48 ppb
2021-08-04EH01585-011.52 ppb
2021-08-04EH01585-021.44 ppb
2021-11-15EK03591-020.637 ppb
2021-11-15EK03591-010.643 ppb
2022-02-23FB04167-021.18 ppb
2022-02-23FB04167-011.02 ppb
2022-05-24FE04698-011.70 ppb
2022-05-24FE04698-021.68 ppb
2022-08-24FH05520-011.64 ppb
2022-08-24FH05520-021.61 ppb
2022-11-02FK00996-010.942 ppb
2022-11-02FK00996-021.16 ppb
2023-02-16GB03256-010.704 ppb
2023-02-16GB03256-020.725 ppb
2023-05-18GE03933-012.02 ppb
2023-05-18GE03933-022.11 ppb
2023-08-17GH03914-011.95 ppb
2023-08-17GH03914-021.97 ppb
2023-11-07GK01638-011.53 ppb
2023-11-07GK01638-021.38 ppb