Know Your Environment. Protect Your Health.

Bromoform

Retreat Water System

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)

9

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20180.845 ppb42ND - 1.70 ppb
2019ND40ND
2020ND40ND
2021ND40ND
20221.46 ppb43ND - 2.20 ppb
20231.30 ppb441.01 ppb - 1.58 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
2018-02-01Q1804163003ND
2018-04-18Q18159300011.68 ppb
2018-07-18Q18285970021.70 ppb
2018-10-26Q1843298001ND
2019-02-26Q1908367002ND
2019-04-30Q1917510003ND
2019-09-24Q1968207002ND
2019-11-20Q1977646002ND
2020-02-11Q2005443002ND
2020-05-28Q2021197002ND
2020-08-24Q2033896002ND
2020-10-22Q2041241003ND
2021-01-14Q2101051002ND
2021-04-12Q2109262002ND
2021-07-13Q2118253002ND
2021-10-04Q2127183002ND
2022-03-16Q2208889002ND
2022-05-04Q22134460011.53 ppb
2022-08-24Q22253870022.12 ppb
2022-11-16Q22344940032.20 ppb
2023-02-15Q23062970031.22 ppb
2023-06-06Q23214490021.01 ppb
2023-08-22Q23354220021.58 ppb
2023-11-02Q23470750021.37 ppb