Know Your Environment. Protect Your Health.

Dibromochloromethane

San Antonio Water Company

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.

 

15

Samples

0

Samples exceeding legal limit (MCL)

6

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND20ND
20190.333 ppb31ND - 1.000 ppb
20200.333 ppb31ND - 1.000 ppb
20210.333 ppb31ND - 1.000 ppb
20220.600 ppb21ND - 1.20 ppb
20231.40 ppb221.10 ppb - 1.70 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
2018-09-18CA3610085_DST_604-201809181200ND
2018-09-18CA3610085_DST_601-201809181000ND
2019-08-13CA3610085_DST_605-201908131015ND
2019-08-13CA3610085_DST_601-201908130915ND
2019-08-13CA3610085_DST_604-2019081309301.000 ppb
2020-08-10CA3610085_DST_601-2020081009421.000 ppb
2020-08-10CA3610085_DST_604-202008101023ND
2020-08-10CA3610085_DST_605-202008101123ND
2021-10-12CA3610085_DST_601-2021101212001.000 ppb
2021-10-12CA3610085_DST_605-202110121050ND
2021-10-12CA3610085_DST_604-202110121220ND
2022-09-27CA3610085_DST_604-202209270935ND
2022-09-27CA3610085_DST_601-2022092709201.20 ppb
2023-08-15CA3610085_DST_604-2023081510001.10 ppb
2023-08-15CA3610085_DST_601-2023081504451.70 ppb