Know Your Environment. Protect Your Health.

Bromodichloromethane

City of Chico

Bromodichloromethane, one of the total trihalomethanes (TTHMs), is formed when chlorine or other disinfectants are used to treat drinking water. Bromodichloromethane and other disinfection byproducts increase the risk of cancer and may cause problems during pregnancy. Click here to read more about disinfection byproducts.

 

39

Samples

0

Samples exceeding legal limit (MCL)

11

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20180.377 ppb72ND - 1.60 ppb
20190.201 ppb71ND - 1.41 ppb
20200.191 ppb81ND - 1.53 ppb
2021ND70ND
20221.00 ppb53ND - 2.12 ppb
20231.01 ppb54ND - 1.49 ppb

ppb = parts per billion

State, National, and Health Guidelines for Drinking Water

EWG Health Guideline: 0.06 ppb

The EWG Health Guideline of 0.06 ppb for bromodichloromethane was 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 and harm to fetal growth and development.

ppb = parts per billion

All test results

Date Lab ID Result
2018-02-28Q1808235001ND
2018-06-07Q18227020011.60 ppb
2018-09-26Q18385000011.04 ppb
2018-12-13Q1851676001ND
2018-12-13Q1851676003ND
2018-12-13Q1851676006ND
2018-12-13Q1851676023ND
2019-01-08Q1900653001ND
2019-01-08Q1900653006ND
2019-01-08Q1900653007ND
2019-01-08Q1900653010ND
2019-04-09Q1914098001ND
2019-08-13Q19541520011.41 ppb
2019-11-21Q1977808001ND
2020-03-02Q2007727001ND
2020-03-02Q2007727006ND
2020-06-01Q2021442001ND
2020-06-01Q2021442003ND
2020-08-19Q2033209013ND
2020-08-19Q20332090031.53 ppb
2020-08-19Q2033209001ND
2020-12-16Q2049866001ND
2021-03-10Q2106372001ND
2021-05-12Q2112418001ND
2021-08-11Q2121372007ND
2021-08-11Q2121372009ND
2021-08-11Q2121372011ND
2021-08-11Q2121372022ND
2021-12-14Q2135210001ND
2022-09-08Q2226813001ND
2022-09-08Q22268130112.12 ppb
2022-09-08Q22268130101.09 ppb
2022-09-08Q22268130051.81 ppb
2022-09-08Q2226813003ND
2023-05-30Q23199480011.04 ppb
2023-05-30Q23199480021.42 ppb
2023-05-30Q2319948009ND
2023-05-30Q23199480111.09 ppb
2023-05-30Q23199480131.49 ppb