Know Your Environment. Protect Your Health.

Bromoform

Bonney Lake Water Department

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.

 

48

Samples

0

Samples exceeding legal limit (MCL)

5

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20180.120 ppb102ND - 0.610 ppb
20190.143 ppb82ND - 0.620 ppb
2020N/A00N/A
2021ND80ND
2022ND80ND
20230.0764 ppb142ND - 0.570 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
2018-03-14ND
2018-03-14ND
2018-05-15ND
2018-05-15ND
2018-06-06ND
2018-06-06ND
2018-09-20ND
2018-09-20ND
2018-12-170.610 ppb
2018-12-170.590 ppb
2019-03-18ND
2019-03-18ND
2019-05-220.520 ppb
2019-05-220.620 ppb
2019-08-13ND
2019-08-13ND
2019-11-21ND
2019-11-21ND
2021-04-074102471ND
2021-04-074102472ND
2021-05-244126092ND
2021-05-244126091ND
2021-08-124159298ND
2021-08-124159299ND
2021-11-174207525ND
2021-11-174207527ND
2022-02-094241803ND
2022-02-094241804ND
2022-05-104286829ND
2022-05-104286828ND
2022-08-164363907ND
2022-08-164363909ND
2022-11-084374875ND
2022-11-084374877ND
2023-02-074411914ND
2023-02-074411915ND
2023-04-1044442940.500 ppb
2023-04-104444291ND
2023-05-224466329ND
2023-05-224466332ND
2023-07-244509854ND
2023-07-244509852ND
2023-07-244509855ND
2023-07-244509858ND
2023-09-124525783ND
2023-09-124525782ND
2023-11-274556426ND
2023-11-2745564290.570 ppb