Know Your Environment. Protect Your Health.

Dibromochloromethane

Swansea, Town of

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.

 

48

Samples

0

Samples exceeding legal limit (MCL)

9

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20181.40 ppb86ND - 3.09 ppb
20190.483 ppb82ND - 2.77 ppb
2020ND80ND
2021ND80ND
20220.145 ppb81ND - 1.16 ppb
2023ND80ND

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
2018-01-302180202-271.24 ppb
2018-01-302180202-281.13 ppb
2018-05-012180502-23ND
2018-05-012180502-24ND
2018-08-022180803-053.09 ppb
2018-08-022180803-061.58 ppb
2018-10-292181101-461.60 ppb
2018-10-292181101-452.59 ppb
2019-02-042190205-26ND
2019-02-042190205-252.77 ppb
2019-04-302190501-25ND
2019-04-302190501-26ND
2019-07-312190802-261.09 ppb
2019-07-312190802-25ND
2019-11-082191113-34ND
2019-11-082191113-33ND
2020-02-042200205-16ND
2020-02-042200205-15ND
2020-05-052200506-35ND
2020-05-052200506-36ND
2020-08-032200804-16ND
2020-08-032200804-15ND
2020-11-052201106-06ND
2020-11-052201106-05ND
2021-02-022210203-16ND
2021-02-022210203-15ND
2021-05-172210518-15ND
2021-05-172210518-16ND
2021-08-042210805-15ND
2021-08-042210805-16ND
2021-11-022211103-25ND
2021-11-022211103-26ND
2022-02-012220202-15ND
2022-02-012220202-161.16 ppb
2022-05-052220506-14ND
2022-05-052220506-22ND
2022-08-012220802-15ND
2022-08-012220802-16ND
2022-11-012221102-31ND
2022-11-012221102-32ND
2023-02-022230203-16ND
2023-02-022230203-15ND
2023-05-022230503-28ND
2023-05-022230503-27ND
2023-08-102230811-22ND
2023-08-102230811-21ND
2023-10-302231031-15ND
2023-10-302231031-16ND