Know Your Environment. Protect Your Health.

Dibromochloromethane

City of Alpine

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.

 

30

Samples

0

Samples exceeding legal limit (MCL)

12

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20181.26 ppb52ND - 3.49 ppb
20190.648 ppb51ND - 3.24 ppb
20201.54 ppb51ND - 7.69 ppb
20210.484 ppb52ND - 1.35 ppb
20222.79 ppb53ND - 6.74 ppb
20231.48 ppb53ND - 5.19 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
2018-07-17Q1828669004ND
2018-07-17Q1828669005ND
2018-07-17Q18286690082.81 ppb
2018-07-17Q18286690163.49 ppb
2018-07-17Q1828669002ND
2019-06-18Q1937877010ND
2019-06-18Q1937877008ND
2019-06-18Q1937877006ND
2019-06-18Q19378770053.24 ppb
2019-06-18Q1937877001ND
2020-06-01Q20215250167.69 ppb
2020-06-01Q2021525017ND
2020-06-01Q2021525019ND
2020-06-01Q2021525021ND
2020-06-01Q2021525023ND
2021-07-13Q2118334003ND
2021-07-13Q2118334015ND
2021-07-13Q21183340091.07 ppb
2021-07-13Q2118334007ND
2021-07-13Q21183340051.35 ppb
2022-09-19Q22280890025.59 ppb
2022-09-19Q2228089003ND
2022-09-19Q22280890051.62 ppb
2022-09-19Q2228089007ND
2022-09-19Q22280890096.74 ppb
2023-07-24Q2329551005ND
2023-07-24Q23295510071.13 ppb
2023-07-24Q2329551010ND
2023-07-24Q23295510121.07 ppb
2023-07-24Q23295510265.19 ppb