Know Your Environment. Protect Your Health.

Dibromochloromethane

Mcneil Island Water

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.

 

21

Samples

0

Samples exceeding legal limit (MCL)

10

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20180.450 ppb43ND - 0.700 ppb
20190.460 ppb53ND - 0.940 ppb
2020N/A00N/A
20210.155 ppb41ND - 0.620 ppb
20220.414 ppb53ND - 0.790 ppb
2023ND30ND

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
2018-03-280.700 ppb
2018-06-190.510 ppb
2018-08-140.590 ppb
2018-11-07ND
2019-04-10ND
2019-05-15ND
2019-06-120.690 ppb
2019-08-140.940 ppb
2019-11-130.670 ppb
2021-02-104074661ND
2021-05-054115259ND
2021-08-1141595850.620 ppb
2021-11-174207562ND
2022-02-1642492290.630 ppb
2022-05-254298856ND
2022-06-134296753ND
2022-08-1743468470.650 ppb
2022-11-0743745930.790 ppb
2023-07-134485479ND
2023-08-244516787ND
2023-11-034548861ND