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EWG's Tap Water Database — 2021 UPDATE

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Bromoform

Intracoastal Water System West

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

 

122

Samples

0

Samples exceeding legal limit (MCL)

34

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20140.749 ppb3418ND - 2.60 ppb
20150.390 ppb166ND - 1.70 ppb
20160.185 ppb244ND - 1.50 ppb
20170.0838 ppb162ND - 0.670 ppb
2018ND160ND
20190.325 ppb164ND - 1.40 ppb

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
2014-03-03680-99084-8ND
2014-03-03680-99084-92.60 ppb
2014-03-03680-99084-8ND
2014-03-03680-99084-92.60 ppb
2014-03-10AD89567ND
2014-03-10AD89567ND
2014-03-14680-99611-10.750 ppb
2014-03-14680-99611-21.40 ppb
2014-03-14680-99611-10.750 ppb
2014-03-14680-99611-21.40 ppb
2014-05-13680-101411-1ND
2014-05-13680-101411-21.50 ppb
2014-05-13680-101411-1ND
2014-05-13680-101411-21.50 ppb
2014-06-10680-102329-1ND
2014-06-10680-102329-21.80 ppb
2014-06-10680-102329-1ND
2014-06-10680-102329-21.80 ppb
2014-08-18680-104449-15ND
2014-08-18680-104449-162.00 ppb
2014-08-18680-104449-15ND
2014-08-18680-104449-162.00 ppb
2014-09-09680-105291-1ND
2014-09-09680-105291-21.000 ppb
2014-09-09680-105291-1ND
2014-09-09680-105291-21.000 ppb
2014-11-06680-107124-5ND
2014-11-06680-107124-60.680 ppb
2014-11-06680-107124-5ND
2014-11-06680-107124-60.680 ppb
2014-12-08680-108093-1ND
2014-12-08680-108093-21.000 ppb
2014-12-08680-108093-1ND
2014-12-08680-108093-21.000 ppb
2015-03-09680-110691-1ND
2015-03-09680-110691-2ND
2015-03-09680-110691-1ND
2015-03-09680-110691-2ND
2015-06-18680-113759-1ND
2015-06-18680-113759-21.70 ppb
2015-06-18680-113759-1ND
2015-06-18680-113759-21.70 ppb
2015-09-14680-116756-10.620 ppb
2015-09-14680-116756-20.800 ppb
2015-09-14680-116756-10.620 ppb
2015-09-14680-116756-20.800 ppb
2015-12-28680-120465-1ND
2015-12-28680-120465-2ND
2015-12-28680-120465-1ND
2015-12-28680-120465-2ND
2016-03-10680-122911-1ND
2016-03-10680-122911-20.720 ppb
2016-03-10680-122911-1ND
2016-03-10680-122911-20.720 ppb
2016-06-07680-126259-1ND
2016-06-07680-126259-2ND
2016-06-07680-126259-1ND
2016-06-07680-126259-2ND
2016-06-22680-126792-1ND
2016-06-22680-126792-2ND
2016-06-22680-126792-1ND
2016-06-22680-126792-2ND
2016-09-06680-129536-1ND
2016-09-06680-129536-2ND
2016-09-06680-129536-1ND
2016-09-06680-129536-2ND
2016-09-14680-129853-1ND
2016-09-14680-129853-2ND
2016-09-14680-129853-1ND
2016-09-14680-129853-2ND
2016-12-06680-132851-11.50 ppb
2016-12-06680-132851-2ND
2016-12-06680-132851-11.50 ppb
2016-12-06680-132851-2ND
2017-03-1735301472003ND
2017-03-1735301472004ND
2017-03-1735301472003ND
2017-03-1735301472004ND
2017-06-0235315770007ND
2017-06-0235315770008ND
2017-06-0235315770007ND
2017-06-0235315770008ND
2017-09-27353389350110.670 ppb
2017-09-2735338935012ND
2017-09-27353389350110.670 ppb
2017-09-2735338935012ND
2017-12-1435363762001ND
2017-12-1435363762002ND
2017-12-1435363762001ND
2017-12-1435363762002ND
2018-03-0935379170001ND
2018-03-0935379170002ND
2018-03-0935379170001ND
2018-03-0935379170002ND
2018-06-0835397255001ND
2018-06-0835397255002ND
2018-06-0835397255001ND
2018-06-0835397255002ND
2018-09-2135419542003ND
2018-09-2135419542004ND
2018-09-2135419542003ND
2018-09-2135419542004ND
2018-12-0635435850001ND
2018-12-0635435850002ND
2018-12-0635435850001ND
2018-12-0635435850002ND
2019-03-0735452895001ND
2019-03-0735452895002ND
2019-03-0735452895001ND
2019-03-0735452895002ND
2019-06-0535473738001ND
2019-06-0535473738002ND
2019-06-0535473738001ND
2019-06-0535473738002ND
2019-09-0935496315001ND
2019-09-0935496315002ND
2019-09-0935496315001ND
2019-09-0935496315002ND
2019-12-13355201000011.40 ppb
2019-12-13355201000021.20 ppb
2019-12-13355201000011.40 ppb
2019-12-13355201000021.20 ppb