Know Your Environment. Protect Your Health.

Bromoform

Grand Harbor Water Supply Corporation

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.

 

24

Samples

0

Samples exceeding legal limit (MCL)

21

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20184.42 ppb441.59 ppb - 6.47 ppb
20192.36 ppb43ND - 4.12 ppb
20201.27 ppb42ND - 2.63 ppb
20212.45 ppb441.52 ppb - 4.99 ppb
20224.34 ppb443.38 ppb - 6.04 ppb
20235.63 ppb444.23 ppb - 6.43 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
2018-02-28Q18082400011.59 ppb
2018-06-07Q18227060016.47 ppb
2018-09-26Q18385020014.63 ppb
2018-12-13Q18516800024.99 ppb
2019-02-14Q19070600012.23 ppb
2019-06-06Q1932778001ND
2019-08-13Q19541550013.08 ppb
2019-10-30Q19746110024.12 ppb
2020-02-13Q20059380022.63 ppb
2020-06-01Q20214480012.45 ppb
2020-09-14Q2036301001ND
2020-12-16Q2049868001ND
2021-03-18Q21071500021.75 ppb
2021-05-12Q21124210011.55 ppb
2021-08-11Q21213730011.52 ppb
2021-12-16Q21357210024.99 ppb
2022-03-07Q22076570023.88 ppb
2022-06-07Q22158540013.38 ppb
2022-09-09Q22269850014.07 ppb
2022-11-21Q22349750016.04 ppb
2023-03-21Q23106820014.23 ppb
2023-06-20Q23235430016.43 ppb
2023-09-12Q23390770016.41 ppb
2023-12-05Q23517260015.44 ppb