Know Your Environment. Protect Your Health.

Dibromochloromethane

Arlington Water Department

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.

 

42

Samples

0

Samples exceeding legal limit (MCL)

24

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20180.738 ppb85ND - 1.80 ppb
20191.05 ppb86ND - 1.90 ppb
2020N/A00N/A
20210.730 ppb105ND - 2.20 ppb
20220.663 ppb84ND - 2.00 ppb
20230.750 ppb84ND - 2.30 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
2018-02-13ND
2018-02-131.20 ppb
2018-05-15ND
2018-05-150.800 ppb
2018-08-210.700 ppb
2018-08-211.80 ppb
2018-11-19ND
2018-11-191.40 ppb
2019-02-19ND
2019-02-191.80 ppb
2019-05-201.90 ppb
2019-05-200.500 ppb
2019-08-191.80 ppb
2019-08-190.500 ppb
2019-11-18ND
2019-11-181.90 ppb
2021-02-1840780751.20 ppb
2021-02-184078077ND
2021-05-124169241ND
2021-05-124169240ND
2021-05-184118960ND
2021-05-1841189622.00 ppb
2021-08-1741661740.500 ppb
2021-08-1741636901.40 ppb
2021-11-1742106552.20 ppb
2021-11-174210653ND
2022-02-154246181ND
2022-02-1542461792.00 ppb
2022-05-1842967721.90 ppb
2022-05-184296774ND
2022-08-1543395510.900 ppb
2022-08-1543395540.500 ppb
2022-11-154379469ND
2022-11-154379473ND
2023-02-214417100ND
2023-02-214417102ND
2023-05-164457503ND
2023-05-1644575091.40 ppb
2023-08-2145070461.30 ppb
2023-08-2145070441.000 ppb
2023-11-2145629032.30 ppb
2023-11-214562901ND