Know Your Environment. Protect Your Health.

Dibromochloromethane

Lynnfield Water District (MWRA)

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.

 

8

Samples

0

Samples exceeding legal limit (MCL)

8

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20180.980 ppb145144ND - 1.39 ppb
20190.906 ppb136135ND - 1.25 ppb
20200.831 ppb163153ND - 1.50 ppb
20210.798 ppb158148ND - 1.13 ppb
20220.790 ppb330.680 ppb - 0.900 ppb
20230.786 ppb550.560 ppb - 1.06 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 Result
2022-10-210.790 ppb
2022-10-310.680 ppb
2022-12-020.900 ppb
2023-01-061.03 ppb
2023-02-010.560 ppb
2023-04-041.06 ppb
2023-07-110.620 ppb
2023-10-170.660 ppb