Know Your Environment. Protect Your Health.

Dibromochloromethane

Guilford Water Authority

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.

 

12

Samples

0

Samples exceeding legal limit (MCL)

4

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND20ND
2019ND20ND
20200.460 ppb21ND - 0.920 ppb
20210.635 ppb21ND - 1.27 ppb
20220.260 ppb21ND - 0.520 ppb
20230.265 ppb21ND - 0.530 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
2018-09-21(704) SP 704ND
2018-12-07(702) SP 702ND
2019-08-30(704) SP 704ND
2019-12-029L05180-01ND
2020-09-020.920 ppb
2020-12-02ND
2021-09-011.27 ppb
2021-12-01ND
2022-09-020.520 ppb
2022-11-30ND
2023-08-310.530 ppb
2023-11-30ND