Know Your Environment. Protect Your Health.

Bromoform

Nob Hill Water Association

Bromoform, one of the total trihalomethanes (TTHMs), is formed when chlorine or other disinfectants are used to treat drinking water. Bromoform and other disinfection byproducts increase the risk of cancer and may cause problems during pregnancy. Click here to read more about disinfection byproducts.

 

19

Samples

0

Samples exceeding legal limit (MCL)

5

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND30ND
20190.455 ppb21ND - 0.910 ppb
2020N/A00N/A
20210.108 ppb51ND - 0.540 ppb
20220.110 ppb71ND - 0.770 ppb
20230.985 ppb220.930 ppb - 1.04 ppb

ppb = parts per billion

State, National, and Health Guidelines for Drinking Water

EWG Health Guideline: 0.5 ppb

The EWG Health Guideline of 0.5 ppb for bromoform is 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, harm to reproduction and child development, and change to fetal growth and development .

ppb = parts per billion

All test results

Date Lab ID Result
2018-06-06ND
2018-08-13ND
2018-08-13ND
2019-07-020.910 ppb
2019-07-02ND
2021-07-074144639ND
2021-07-074146287ND
2021-07-074146288ND
2021-07-144149172ND
2021-07-1441491700.540 ppb
2022-03-214258505ND
2022-06-064298839ND
2022-08-154327034ND
2022-08-1543551240.770 ppb
2022-08-154355129ND
2022-09-144344892ND
2022-10-114356385ND
2023-07-1844988631.04 ppb
2023-07-1844988610.930 ppb