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EWG's Tap Water Database — 2021 UPDATE

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Bromoform

Golden State Water Company - Clearlake System

Bromoform, one of the total trihalomethanes (TTHMs), is formed when chlorine or other disinfectants are used to treat drinking water. Bromoform and other disinfection byproducts increase the risk of cancer and may cause problems during pregnancy. Click here to read more about disinfection byproducts.

MORE ABOUT THIS CONTAMINANT

 

114

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND120ND
2015ND80ND
2016ND140ND
2017ND640ND
2018ND80ND
2019ND80ND

ppb = parts per billion

State and national drinking water standards and health guidelines

EWG Health Guideline 0.5 ppb

The EWG Health Guideline of 0.5 ppb for bromoform was proposed in 2018 by the California Office of Environmental Health Hazard Assessment as a one-in-a-million lifetime risk of cancer. Values greater than one-in-a-million cancer risk level can result in increased cancer cases above one in a million people.

ppb = parts per billion

All test results

Date Lab ID Result
2014-01-092706-003-1030ND
2014-01-092706-007-1105ND
2014-04-092706-003-1100ND
2014-06-042706-007-1120ND
2014-07-102706-007-0830ND
2014-08-132706-003-0735ND
2014-10-082706-003-0650ND
2014-10-082706-007-0715ND
2014-11-242706-003-0940ND
2014-11-242706-007-1000ND
2014-12-222706-007-1242ND
2014-12-232706-003-0938ND
2015-01-142706-003-0720ND
2015-01-142706-007-0745ND
2015-04-092706-003-0915ND
2015-04-092706-007-0940ND
2015-07-092706-003-1300ND
2015-07-092706-007-1315ND
2015-10-072706-003-1154ND
2015-10-072706-007-1140ND
2016-01-132706-003-1145ND
2016-01-132706-007-1205ND
2016-02-102706-003-1230ND
2016-02-102706-007-1250ND
2016-04-132706-003-1150ND
2016-04-132706-007-1215ND
2016-07-142706-003-1200ND
2016-07-142706-007-1135ND
2016-10-052706-003-1155ND
2016-10-052706-007-1220ND
2016-11-092706-003-1243ND
2016-11-092706-007-1310ND
2016-12-142706-003-1230ND
2016-12-142706-007-1205ND
2017-01-119590-003-1115ND
2017-01-119590-007-1150ND
2017-01-189590-003-0915ND
2017-01-189590-007-0935ND
2017-01-269590-003-1055ND
2017-01-269590-007-1110ND
2017-02-019590-002-1320ND
2017-02-019590-003-1150ND
2017-02-019590-007-0930ND
2017-02-089590-003-0910ND
2017-02-089590-007-0930ND
2017-03-039590-003-0835ND
2017-03-039590-007-0855ND
2017-03-089590-002-1115ND
2017-03-089590-003-1155ND
2017-03-089590-007-1220ND
2017-03-159590-002-0907ND
2017-03-159590-003-0944ND
2017-03-159590-007-1005ND
2017-03-229590-003-0920ND
2017-03-229590-007-0935ND
2017-03-299590-003-0935ND
2017-03-299590-007-0955ND
2017-04-129590-002-1125ND
2017-04-129590-003-0845ND
2017-04-129590-007-0910ND
2017-04-209590-002-0915ND
2017-04-209590-003-0940ND
2017-04-209590-007-1000ND
2017-04-269590-002-0835ND
2017-04-269590-003-0905ND
2017-04-269590-007-0925ND
2017-05-039590-003-0935ND
2017-05-039590-007-0955ND
2017-05-109590-002-0845ND
2017-05-109590-003-0915ND
2017-05-109590-007-0950ND
2017-05-179590-003-0904ND
2017-05-179590-007-1026ND
2017-05-249590-002-0845ND
2017-06-299590-002-0921ND
2017-06-299590-003-1006ND
2017-06-299590-007-0953ND
2017-07-059590-002-0855ND
2017-07-059590-003-0915ND
2017-07-059590-007-0935ND
2017-07-129590-002-1328ND
2017-07-129590-003-1040ND
2017-07-129590-007-1110ND
2017-07-199590-003-0915ND
2017-07-199590-007-0933ND
2017-07-269590-003-0919ND
2017-07-269590-007-0949ND
2017-08-029590-002-0845ND
2017-08-029590-003-0905ND
2017-08-029590-007-0925ND
2017-08-099590-002-1130ND
2017-08-099590-003-0940ND
2017-08-099590-007-0900ND
2017-08-169590-002-1010ND
2017-08-169590-003-0842ND
2017-08-169590-007-0910ND
2017-10-259590-003-0905ND
2017-10-259590-007-0935ND
2018-01-109590-003-0910ND
2018-01-109590-007-0940ND
2018-04-119590-003-0855ND
2018-04-119590-007-0915ND
2018-07-119590-003-0900ND
2018-07-119590-007-0920ND
2018-10-109590-003-0850ND
2018-10-109590-007-0915ND
2019-01-169590-003-0850ND
2019-01-169590-007-0915ND
2019-04-179590-003-0905ND
2019-04-179590-007-0935ND
2019-07-179590-003-0845ND
2019-07-179590-007-0910ND
2019-10-169590-003-0910ND
2019-10-169590-007-0930ND