Know Your Environment. Protect Your Health.

Bromoform

Cathedral Gardens Water District

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)

9

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND630ND
2019ND450ND
20200.397 ppb32ND - 0.660 ppb
20210.315 ppb42ND - 0.650 ppb
20220.653 ppb330.630 ppb - 0.670 ppb
20230.865 ppb220.810 ppb - 0.920 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
2020-03-03701236490010.660 ppb
2020-03-03701236490020.530 ppb
2020-12-0270155228001ND
2021-03-0570164783004ND
2021-03-0570164783002ND
2021-11-24701958320020.650 ppb
2021-11-24701958320010.610 ppb
2022-03-11702071870020.630 ppb
2022-03-11702071870010.660 ppb
2022-05-05702135470020.670 ppb
2023-03-09702488810010.810 ppb
2023-03-09702488810020.920 ppb