Know Your Environment. Protect Your Health.

Dibromochloromethane

Castroville Community Services District

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
20183.00 ppb21ND - 6.00 ppb
20193.00 ppb21ND - 6.00 ppb
20201.000 ppb21ND - 2.00 ppb
20212.50 ppb21ND - 5.00 ppb
2022ND20ND
20232.00 ppb21ND - 4.00 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
2018-09-05CA2710005_DST_801-201809050930ND
2018-09-05CA2710005_DST_802-2018090510006.00 ppb
2019-09-24CA2710005_DST_801-2019092414026.00 ppb
2019-09-24CA2710005_DST_802-201909241022ND
2020-09-09CA2710005_DST_801-2020090910262.00 ppb
2020-09-09CA2710005_DST_802-202009091000ND
2021-09-13CA2710005_DST_801-2021091309005.00 ppb
2021-09-13CA2710005_DST_802-202109131030ND
2022-09-12CA2710005_DST_801-202209120955ND
2022-09-12CA2710005_DST_802-202209121015ND
2023-10-02CA2710005_DST_801-2023100214004.00 ppb
2023-10-02CA2710005_DST_802-202310021420ND