Know Your Environment. Protect Your Health.

Dibromochloromethane

San Diego Municipal Utility District 1

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.

 

24

Samples

0

Samples exceeding legal limit (MCL)

5

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20180.367 ppb31ND - 1.10 ppb
2019ND30ND
2020ND30ND
20210.440 ppb52ND - 1.20 ppb
20220.250 ppb41ND - 1.000 ppb
20230.200 ppb61ND - 1.20 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
2018-02-12AE13322ND
2018-06-04AE28465ND
2018-06-04AE285551.10 ppb
2019-02-11AE53819ND
2019-05-06AE64845ND
2019-05-06AE64908ND
2020-06-04AF14136ND
2020-06-04AF14192ND
2020-06-04AF14196ND
2021-06-07AF574511.20 ppb
2021-06-07AF575191.000 ppb
2021-07-22AF63070ND
2021-11-29AF77508ND
2021-11-29AF77520ND
2022-01-20AF80982ND
2022-01-20AF81002ND
2022-06-27AG02766ND
2022-09-28AG154411.000 ppb
2023-02-22AG29940ND
2023-04-24AG37704ND
2023-05-08AG39542ND
2023-05-08AG39544ND
2023-07-24AG498321.20 ppb
2023-11-15AG63792ND