Know Your Environment. Protect Your Health.

Bromodichloromethane

St John Water District 3

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.

 

132

Samples

0

Samples exceeding legal limit (MCL)

23

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20180.400 ppb322ND - 6.40 ppb
20191.51 ppb324ND - 12.4 ppb
2020ND160ND
2021ND160ND
20220.739 ppb209ND - 7.60 ppb
20230.253 ppb168ND - 0.730 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
2018-03-15353805410016.40 ppb
2018-03-1535380541002ND
2018-03-1535380541003ND
2018-03-1535380541004ND
2018-03-15353805410016.40 ppb
2018-03-1535380541002ND
2018-03-1535380541003ND
2018-03-1535380541004ND
2018-06-1435398653001ND
2018-06-1435398653002ND
2018-06-1435398653003ND
2018-06-1435398653004ND
2018-06-1435398653001ND
2018-06-1435398653002ND
2018-06-1435398653003ND
2018-06-1435398653004ND
2018-09-0635416144001ND
2018-09-0635416144002ND
2018-09-0635416144003ND
2018-09-0635416144001ND
2018-09-0635416144002ND
2018-09-0635416144003ND
2018-09-2035419461001ND
2018-09-2035419461001ND
2018-12-1035436358001ND
2018-12-1035436358002ND
2018-12-1035436358003ND
2018-12-1035436358004ND
2018-12-1035436358001ND
2018-12-1035436358002ND
2018-12-1035436358003ND
2018-12-1035436358004ND
2019-03-1335454558001ND
2019-03-1335454558002ND
2019-03-1335454558003ND
2019-03-1335454558004ND
2019-03-1335454558001ND
2019-03-1335454558002ND
2019-03-1335454558003ND
2019-03-1335454558004ND
2019-06-113547528200111.7 ppb
2019-06-1135475282002ND
2019-06-1135475282003ND
2019-06-1135475282004ND
2019-06-113547528200111.7 ppb
2019-06-1135475282002ND
2019-06-1135475282003ND
2019-06-1135475282004ND
2019-09-1235497592001ND
2019-09-1235497592002ND
2019-09-1235497592003ND
2019-09-1235497592004ND
2019-09-1235497592001ND
2019-09-1235497592002ND
2019-09-1235497592003ND
2019-09-1235497592004ND
2019-12-093551758900112.4 ppb
2019-12-0935517589002ND
2019-12-0935517589003ND
2019-12-0935517589004ND
2019-12-093551758900112.4 ppb
2019-12-0935517589002ND
2019-12-0935517589003ND
2019-12-0935517589004ND
2020-03-1135537037002ND
2020-03-1735538242001ND
2020-03-1735538242002ND
2020-03-1735538242003ND
2020-06-1135556251001ND
2020-06-1135556251002ND
2020-06-1135556251003ND
2020-06-1135556251004ND
2020-09-0335575676001ND
2020-09-0335575676002ND
2020-09-0335575676003ND
2020-09-0335575676004ND
2020-12-1035598317001ND
2020-12-1035598317002ND
2020-12-1035598317003ND
2020-12-1035598317004ND
2021-03-1935620546001ND
2021-03-1935620546002ND
2021-03-1935620546003ND
2021-03-1935620546004ND
2021-06-3035644466001ND
2021-06-3035644466002ND
2021-06-3035644466003ND
2021-06-3035644466004ND
2021-09-2435667106001ND
2021-09-2435667106002ND
2021-09-2435667106003ND
2021-09-2435667106004ND
2021-12-2135686306001ND
2021-12-2135686306002ND
2021-12-2135686306003ND
2021-12-2135686306004ND
2022-03-1035702952001ND
2022-03-1035702952002ND
2022-03-1035702952003ND
2022-03-10357029520047.60 ppb
2022-06-08B2202690-001ND
2022-06-08B2202690-002ND
2022-06-08B2202690-003ND
2022-06-08B2202690-004ND
2022-07-2535734268001ND
2022-07-2535734268002ND
2022-07-2535734268003ND
2022-07-2535734268004ND
2022-09-07357450580010.830 ppb
2022-09-07357450580020.830 ppb
2022-09-07357450580030.960 ppb
2022-09-07357450580040.470 ppb
2022-12-01357634270010.990 ppb
2022-12-01357634270021.50 ppb
2022-12-01357634270030.590 ppb
2022-12-01357634270041.000 ppb
2023-03-16357866220010.430 ppb
2023-03-16357866220020.480 ppb
2023-03-16357866220030.450 ppb
2023-03-16357866220040.450 ppb
2023-06-21358083680010.420 ppb
2023-06-21358083680020.580 ppb
2023-06-21358083680030.510 ppb
2023-06-21358083680040.730 ppb
2023-09-1835828420001ND
2023-09-1835828420002ND
2023-09-1835828420003ND
2023-09-1835828420004ND
2023-12-2735850590001ND
2023-12-2735850590002ND
2023-12-2735850590003ND
2023-12-2735850590004ND