Know Your Environment. Protect Your Health.

Bromoform

Lacey 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.

 

28

Samples

0

Samples exceeding legal limit (MCL)

6

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20180.697 ppb32ND - 1.10 ppb
20190.153 ppb41ND - 0.610 ppb
2020N/A00N/A
20210.127 ppb71ND - 0.890 ppb
20220.0545 ppb111ND - 0.600 ppb
20230.183 ppb31ND - 0.550 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
2018-01-251.10 ppb
2018-04-170.990 ppb
2018-04-26ND
2019-01-240.610 ppb
2019-04-08ND
2019-06-20ND
2019-11-13ND
2021-01-2040655850.890 ppb
2021-04-144102468ND
2021-09-134178879ND
2021-09-134178883ND
2021-09-134178876ND
2021-09-134178874ND
2021-09-144178973ND
2022-01-1842342280.600 ppb
2022-05-234286831ND
2022-09-264367968ND
2022-09-274361750ND
2022-10-254374622ND
2022-10-254374626ND
2022-10-264374712ND
2022-10-274374639ND
2022-11-284384852ND
2022-11-284384848ND
2022-12-294401375ND
2023-01-264481718ND
2023-03-204433075ND
2023-07-2545057250.550 ppb