Know Your Environment. Protect Your Health.

Bromoform

City of Presidio

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.

 

12

Samples

0

Samples exceeding legal limit (MCL)

3

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND20ND
20190.870 ppb21ND - 1.74 ppb
20200.875 ppb21ND - 1.75 ppb
2021ND20ND
20220.825 ppb21ND - 1.65 ppb
2023ND20ND

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
2018-07-16Q1828344001ND
2018-07-16Q1828344003ND
2019-06-17Q1937383001ND
2019-06-17Q19373830051.74 ppb
2020-07-27Q2029525003ND
2020-07-27Q20295250101.75 ppb
2021-06-21Q2116157002ND
2021-06-21Q2116157004ND
2022-05-09Q22142140011.65 ppb
2022-05-09Q2214214002ND
2023-06-12Q2322478003ND
2023-06-12Q2322478007ND