Know Your Environment. Protect Your Health.

Bromodichloromethane

City of Leon Valley

Bromodichloromethane, one of the total trihalomethanes (TTHMs), is formed when chlorine or other disinfectants are used to treat drinking water. Bromodichloromethane 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)

24

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20181.95 ppb107ND - 9.50 ppb
20191.07 ppb95ND - 2.40 ppb
20201.18 ppb104ND - 6.90 ppb
20210.500 ppb103ND - 2.40 ppb
20220.590 ppb104ND - 1.90 ppb
20230.190 ppb101ND - 1.90 ppb

ppb = parts per billion

State, National, and Health Guidelines for Drinking Water

EWG Health Guideline: 0.06 ppb

The EWG Health Guideline of 0.06 ppb for bromodichloromethane 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
2018-01-23AE09914ND
2018-03-02AE166561.70 ppb
2018-04-26AE241901.000 ppb
2018-04-26AE24188ND
2018-08-17AE37567ND
2018-08-17AE375711.40 ppb
2018-08-17AE376491.50 ppb
2018-08-17AE376531.40 ppb
2018-10-26AE447649.50 ppb
2018-10-26AE447663.00 ppb
2019-03-01AE569152.40 ppb
2019-03-01AE569191.20 ppb
2019-04-25AE63758ND
2019-06-21AE716781.70 ppb
2019-06-21AE71679ND
2019-07-19AE753582.40 ppb
2019-07-19AE75356ND
2019-10-09AE861331.90 ppb
2019-10-09AE86135ND
2020-01-30AE96323ND
2020-03-25AF045281.80 ppb
2020-04-09AF06303ND
2020-04-09AF063051.60 ppb
2020-07-08AF18871ND
2020-07-08AF188726.90 ppb
2020-07-08AF18899ND
2020-07-08AF18901ND
2020-11-02AF32838ND
2020-11-02AF328401.50 ppb
2021-01-14AF39552ND
2021-01-14AF395582.40 ppb
2021-04-01AF48854ND
2021-05-13AF53840ND
2021-05-13AF538411.40 ppb
2021-05-13AF53869ND
2021-08-03AF64491ND
2021-08-03AF64493ND
2021-12-09AF784971.20 ppb
2021-12-09AF78505ND
2022-02-14AF84680ND
2022-02-14AF846821.000 ppb
2022-04-28AF948371.60 ppb
2022-04-28AF94841ND
2022-06-10AG00804ND
2022-06-10AG008031.90 ppb
2022-07-15AG049711.40 ppb
2022-07-15AG04973ND
2022-10-18AG17425ND
2022-10-18AG17427ND
2023-02-17AG29691ND
2023-02-17AG29695ND
2023-04-21AG37706ND
2023-04-21AG37738ND
2023-06-16AG44995ND
2023-06-16AG449961.90 ppb
2023-08-14AG52400ND
2023-08-14AG52408ND
2023-10-06AG58929ND
2023-10-06AG58931ND