Know Your Environment. Protect Your Health.

Bromoform

City of Tumwater

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.

 

31

Samples

0

Samples exceeding legal limit (MCL)

13

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20180.569 ppb138ND - 1.60 ppb
20190.400 ppb73ND - 1.50 ppb
2020N/A00N/A
20210.350 ppb21ND - 0.700 ppb
20220.200 ppb71ND - 1.40 ppb
20231.15 ppb220.690 ppb - 1.60 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
2018-02-271.000 ppb
2018-02-27ND
2018-02-271.000 ppb
2018-02-270.800 ppb
2018-05-301.10 ppb
2018-05-30ND
2018-05-300.500 ppb
2018-05-300.500 ppb
2018-08-291.60 ppb
2018-08-29ND
2018-08-29ND
2018-08-290.900 ppb
2018-10-25ND
2019-04-24ND
2019-04-240.600 ppb
2019-04-240.700 ppb
2019-04-241.50 ppb
2019-07-31ND
2019-08-28ND
2019-08-28ND
2021-05-0441129250.700 ppb
2021-05-044112923ND
2022-08-254359875ND
2022-08-254359876ND
2022-08-254359874ND
2022-08-254359872ND
2022-08-254359873ND
2022-08-2543591411.40 ppb
2022-08-254359136ND
2023-09-1345257770.690 ppb
2023-09-1345257781.60 ppb