Know Your Environment. Protect Your Health.

Bromoform

City of Spokane

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.

 

60

Samples

0

Samples exceeding legal limit (MCL)

20

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20180.331 ppb115ND - 0.900 ppb
20190.113 ppb183ND - 0.780 ppb
2020N/A00N/A
20210.343 ppb115ND - 1.10 ppb
20220.361 ppb104ND - 1.40 ppb
20230.361 ppb104ND - 1.08 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
2018-01-30ND
2018-01-300.630 ppb
2018-01-30ND
2018-01-30ND
2018-05-10ND
2018-05-100.770 ppb
2018-07-17ND
2018-07-17ND
2018-07-170.900 ppb
2018-11-080.510 ppb
2018-11-080.830 ppb
2019-02-14ND
2019-02-140.600 ppb
2019-05-09ND
2019-05-09ND
2019-07-23ND
2019-07-23ND
2019-07-26ND
2019-07-26ND
2019-07-26ND
2019-07-26ND
2019-07-26ND
2019-07-26ND
2019-07-26ND
2019-07-26ND
2019-08-080.780 ppb
2019-08-08ND
2019-11-13ND
2019-11-130.660 ppb
2021-01-264066970ND
2021-01-264066969ND
2021-02-094097358ND
2021-02-0940973560.660 ppb
2021-05-1341152890.620 ppb
2021-05-134115288ND
2021-07-274195356ND
2021-08-1141598151.10 ppb
2021-08-114159816ND
2021-11-1042038310.500 ppb
2021-11-1042038300.890 ppb
2022-02-1042440940.550 ppb
2022-02-104244095ND
2022-05-1242823051.40 ppb
2022-05-124282306ND
2022-07-264319393ND
2022-07-264319391ND
2022-08-114327017ND
2022-08-1143270160.920 ppb
2022-11-1043730020.740 ppb
2022-11-104373001ND
2023-01-244399432ND
2023-02-0944247000.640 ppb
2023-02-094424701ND
2023-05-104452949ND
2023-05-1044529481.03 ppb
2023-07-254507772ND
2023-08-0344988191.08 ppb
2023-08-034498818ND
2023-11-094547611ND
2023-11-0945476100.860 ppb