Know Your Environment. Protect Your Health.

Dibromochloromethane

City of Castroville

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.

 

18

Samples

0

Samples exceeding legal limit (MCL)

5

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20180.433 ppb31ND - 1.30 ppb
20190.433 ppb31ND - 1.30 ppb
2020ND30ND
20210.400 ppb31ND - 1.20 ppb
20220.367 ppb31ND - 1.10 ppb
20230.333 ppb31ND - 1.000 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
2018-03-28AE20680ND
2018-03-28AE20664ND
2018-06-20AE307261.30 ppb
2019-06-18AE710701.30 ppb
2019-06-18AE71110ND
2019-06-18AE71116ND
2020-01-28AE95679ND
2020-01-28AE95685ND
2020-05-11AF10648ND
2021-06-28AF596631.20 ppb
2021-06-28AF59675ND
2021-06-28AF59673ND
2022-02-08AF83711ND
2022-02-08AF83715ND
2022-09-29AG154591.10 ppb
2023-03-28AG34417ND
2023-03-28AG34419ND
2023-06-12AG439821.000 ppb