Know Your Environment. Protect Your Health.

Dibromochloromethane

El Camino Bay Water System

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

 

29

Samples

0

Samples exceeding legal limit (MCL)

18

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20180.220 ppb51ND - 1.10 ppb
20190.278 ppb51ND - 1.39 ppb
20200.874 ppb52ND - 3.25 ppb
20216.65 ppb444.33 ppb - 11.4 ppb
20225.01 ppb551.68 ppb - 10.6 ppb
20232.90 ppb551.44 ppb - 4.13 ppb

ppb = parts per billion

State, National, and Health Guidelines for Drinking Water

EWG Health Guideline: 0.1 ppb

The EWG Health Guideline of 0.1 ppb for dibromochloromethane 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
2018-03-14Q1810636001ND
2018-06-28Q18259480011.10 ppb
2018-08-27Q1834367001ND
2018-08-27Q1834367003ND
2018-12-10Q1850388001ND
2019-01-28Q1903840007ND
2019-04-04Q1913868001ND
2019-07-01Q1941623001ND
2019-07-01Q1941623003ND
2019-10-08Q19720530011.39 ppb
2020-02-20Q2006573005ND
2020-04-06Q20140010011.12 ppb
2020-08-06Q2031204001ND
2020-08-06Q2031204003ND
2020-12-07Q20486210013.25 ppb
2021-06-17Q21159050054.33 ppb
2021-08-23Q21228030015.46 ppb
2021-08-23Q21228030035.42 ppb
2021-10-27Q213027900111.4 ppb
2022-02-07Q22039800098.73 ppb
2022-05-02Q221295100110.6 ppb
2022-08-01Q22218790011.76 ppb
2022-08-01Q22218790042.30 ppb
2022-10-11Q22306800011.68 ppb
2023-01-05Q23006460051.44 ppb
2023-05-10Q23179420014.13 ppb
2023-07-25Q23294920013.15 ppb
2023-07-25Q23294920032.65 ppb
2023-10-30Q23463720013.15 ppb