Know Your Environment. Protect Your Health.

Dibromochloromethane

City of Marfa

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.

 

12

Samples

0

Samples exceeding legal limit (MCL)

5

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20181.02 ppb21ND - 2.03 ppb
20191.58 ppb21ND - 3.16 ppb
20200.690 ppb21ND - 1.38 ppb
2021ND20ND
20220.600 ppb21ND - 1.20 ppb
20230.565 ppb21ND - 1.13 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
2018-07-16Q1828343002ND
2018-07-16Q18283430042.03 ppb
2019-02-19Q1907586002ND
2019-08-13Q19546320023.16 ppb
2020-02-04Q2004910008ND
2020-05-06Q20178350011.38 ppb
2021-06-21Q2116148002ND
2021-06-21Q2116148003ND
2022-09-19Q2228088001ND
2022-09-19Q22280880051.20 ppb
2023-07-25Q23298530061.13 ppb
2023-07-25Q2329853008ND