Know Your Environment. Protect Your Health.

Bromodichloromethane

St John Water District 1

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.

 

136

Samples

0

Samples exceeding legal limit (MCL)

123

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
201816.0 ppb32326.00 ppb - 28.3 ppb
201910.6 ppb3222ND - 25.9 ppb
202013.8 ppb1615ND - 25.1 ppb
202114.7 ppb1615ND - 22.8 ppb
202215.9 ppb2423ND - 23.1 ppb
202317.8 ppb16160.450 ppb - 24.9 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
2018-03-15353805400016.00 ppb
2018-03-15353805400027.60 ppb
2018-03-15353805400037.60 ppb
2018-03-15353805400046.40 ppb
2018-03-15353805400016.00 ppb
2018-03-15353805400027.60 ppb
2018-03-15353805400037.60 ppb
2018-03-15353805400046.40 ppb
2018-06-143539865200119.0 ppb
2018-06-143539865200216.3 ppb
2018-06-143539865200318.8 ppb
2018-06-143539865200418.9 ppb
2018-06-143539865200119.0 ppb
2018-06-143539865200216.3 ppb
2018-06-143539865200318.8 ppb
2018-06-143539865200418.9 ppb
2018-09-063541614300128.3 ppb
2018-09-063541614300226.3 ppb
2018-09-063541614300326.7 ppb
2018-09-063541614300425.3 ppb
2018-09-063541614300128.3 ppb
2018-09-063541614300226.3 ppb
2018-09-063541614300326.7 ppb
2018-09-063541614300425.3 ppb
2018-12-103543635700111.5 ppb
2018-12-103543635700212.2 ppb
2018-12-103543635700313.0 ppb
2018-12-103543635700411.8 ppb
2018-12-103543635700111.5 ppb
2018-12-103543635700212.2 ppb
2018-12-103543635700313.0 ppb
2018-12-103543635700411.8 ppb
2019-03-13354545570016.70 ppb
2019-03-13354545570026.90 ppb
2019-03-13354545570036.50 ppb
2019-03-1335454557004ND
2019-03-13354545570016.70 ppb
2019-03-13354545570026.90 ppb
2019-03-13354545570036.50 ppb
2019-03-1335454557004ND
2019-06-113547528800111.8 ppb
2019-06-1135475288002ND
2019-06-113547528800311.8 ppb
2019-06-1135475288004ND
2019-06-113547528800111.8 ppb
2019-06-1135475288002ND
2019-06-113547528800311.8 ppb
2019-06-1135475288004ND
2019-09-123549758900123.7 ppb
2019-09-123549758900225.9 ppb
2019-09-123549758900324.6 ppb
2019-09-123549758900425.3 ppb
2019-09-123549758900123.7 ppb
2019-09-123549758900225.9 ppb
2019-09-123549758900324.6 ppb
2019-09-123549758900425.3 ppb
2019-12-093551759100112.8 ppb
2019-12-0935517591002ND
2019-12-093551759100313.4 ppb
2019-12-0935517591004ND
2019-12-093551759100112.8 ppb
2019-12-0935517591002ND
2019-12-093551759100313.4 ppb
2019-12-0935517591004ND
2020-03-11355370390015.80 ppb
2020-03-11355370390027.70 ppb
2020-03-11355370390037.70 ppb
2020-03-1135537039004ND
2020-06-113555625000110.4 ppb
2020-06-113555625000211.4 ppb
2020-06-113555625000311.1 ppb
2020-06-113555625000411.6 ppb
2020-09-033557567500125.1 ppb
2020-09-033557567500222.7 ppb
2020-09-033557567500320.1 ppb
2020-09-033557567500422.6 ppb
2020-12-103559831800115.9 ppb
2020-12-103559831800216.4 ppb
2020-12-103559831800316.1 ppb
2020-12-103559831800416.8 ppb
2021-03-18356205450018.90 ppb
2021-03-19356205450028.90 ppb
2021-03-19356205450039.20 ppb
2021-03-19356205450048.70 ppb
2021-06-303564446900122.5 ppb
2021-06-303564446900222.6 ppb
2021-06-303564446900321.0 ppb
2021-06-303564446900422.8 ppb
2021-09-243566710500117.7 ppb
2021-09-243566710500216.6 ppb
2021-09-243566710500316.9 ppb
2021-09-2435667105004ND
2021-12-213568630500115.2 ppb
2021-12-213568630500215.1 ppb
2021-12-213568630500314.7 ppb
2021-12-213568630500414.7 ppb
2022-03-10357029530017.40 ppb
2022-03-1035702953002ND
2022-03-10357029530037.50 ppb
2022-03-10357029530048.20 ppb
2022-06-083572575500115.1 ppb
2022-06-083572575500215.5 ppb
2022-06-083572575500315.3 ppb
2022-06-083572575500415.2 ppb
2022-06-08B2202689-00115.4 ppb
2022-06-08B2202689-00216.6 ppb
2022-06-08B2202689-00315.6 ppb
2022-06-08B2202689-00415.9 ppb
2022-07-253573427200122.9 ppb
2022-07-253573427200222.5 ppb
2022-07-253573427200323.1 ppb
2022-07-253573427200421.8 ppb
2022-09-073574505900118.6 ppb
2022-09-073574505900220.9 ppb
2022-09-073574505900321.9 ppb
2022-09-073574505900421.0 ppb
2022-12-013576342400114.9 ppb
2022-12-013576342400215.6 ppb
2022-12-013576342400314.4 ppb
2022-12-013576342400415.2 ppb
2023-03-16357866140010.580 ppb
2023-03-163578661400211.1 ppb
2023-03-16357866140039.70 ppb
2023-03-16357866140040.450 ppb
2023-06-213580836900122.2 ppb
2023-06-213580836900221.6 ppb
2023-06-213580836900322.6 ppb
2023-06-213580836900418.3 ppb
2023-09-183582841800124.9 ppb
2023-09-183582841800224.7 ppb
2023-09-183582841800324.7 ppb
2023-09-183582841800424.6 ppb
2023-12-273585059200117.8 ppb
2023-12-273585059200222.4 ppb
2023-12-273585059200319.4 ppb
2023-12-273585059200419.8 ppb