Know Your Environment. Protect Your Health.

Dibromochloromethane

City of Leon Valley

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.

 

59

Samples

0

Samples exceeding legal limit (MCL)

44

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20182.67 ppb10101.10 ppb - 6.80 ppb
20191.80 ppb97ND - 3.70 ppb
20202.27 ppb109ND - 7.20 ppb
20211.30 ppb107ND - 3.40 ppb
20221.28 ppb106ND - 3.60 ppb
20230.870 ppb105ND - 3.40 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
2018-01-23AE099141.10 ppb
2018-03-02AE166562.20 ppb
2018-04-26AE241902.00 ppb
2018-04-26AE241881.50 ppb
2018-08-17AE375671.40 ppb
2018-08-17AE375712.70 ppb
2018-08-17AE376492.10 ppb
2018-08-17AE376532.10 ppb
2018-10-26AE447646.80 ppb
2018-10-26AE447664.80 ppb
2019-03-01AE569151.80 ppb
2019-03-01AE569191.60 ppb
2019-04-25AE63758ND
2019-06-21AE716783.10 ppb
2019-06-21AE716791.10 ppb
2019-07-19AE753583.70 ppb
2019-07-19AE75356ND
2019-10-09AE861333.70 ppb
2019-10-09AE861351.20 ppb
2020-01-30AE963231.30 ppb
2020-03-25AF045282.80 ppb
2020-04-09AF063031.30 ppb
2020-04-09AF063053.30 ppb
2020-07-08AF188711.80 ppb
2020-07-08AF188727.20 ppb
2020-07-08AF18899ND
2020-07-08AF189011.60 ppb
2020-11-02AF328381.20 ppb
2020-11-02AF328402.20 ppb
2021-01-14AF39552ND
2021-01-14AF395583.40 ppb
2021-04-01AF488541.000 ppb
2021-05-13AF538401.50 ppb
2021-05-13AF538412.70 ppb
2021-05-13AF53869ND
2021-08-03AF64491ND
2021-08-03AF644931.40 ppb
2021-12-09AF784971.90 ppb
2021-12-09AF785051.10 ppb
2022-02-14AF84680ND
2022-02-14AF846821.90 ppb
2022-04-28AF948372.50 ppb
2022-04-28AF94841ND
2022-06-10AG00804ND
2022-06-10AG008033.60 ppb
2022-07-15AG049712.40 ppb
2022-07-15AG04973ND
2022-10-18AG174251.000 ppb
2022-10-18AG174271.40 ppb
2023-02-17AG29691ND
2023-02-17AG296951.50 ppb
2023-04-21AG37706ND
2023-04-21AG377381.40 ppb
2023-06-16AG44995ND
2023-06-16AG449963.40 ppb
2023-08-14AG524001.10 ppb
2023-08-14AG52408ND
2023-10-06AG589291.30 ppb
2023-10-06AG58931ND