Know Your Environment. Protect Your Health.

Dibromochloromethane

Grand Harbor 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.

 

20

Samples

0

Samples exceeding legal limit (MCL)

13

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20180.433 ppb31ND - 1.30 ppb
20190.800 ppb32ND - 1.30 ppb
20201.13 ppb32ND - 1.90 ppb
20210.500 ppb31ND - 1.50 ppb
20221.92 ppb551.000 ppb - 4.10 ppb
20230.933 ppb32ND - 1.50 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
2018-06-19AE30463ND
2018-06-19AE304871.30 ppb
2018-06-19AE30450ND
2019-06-13AE705881.30 ppb
2019-06-13AE705991.10 ppb
2019-06-13AE70603ND
2020-07-16AF196871.50 ppb
2020-07-16AF19727ND
2020-07-16AF197311.90 ppb
2021-08-04AF64809ND
2021-08-04AF64813ND
2021-08-04AF648011.50 ppb
2022-03-08AF880961.000 ppb
2022-03-08AF881161.40 ppb
2022-06-01AF990312.00 ppb
2022-06-01AF990891.10 ppb
2022-09-29AG154804.10 ppb
2023-08-09AG519681.50 ppb
2023-08-09AG519891.30 ppb
2023-08-09AG51991ND