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EWG's Tap Water Database — 2021 UPDATE

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Dibromochloromethane

Intracoastal Water System West

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

92

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20145.55 ppb3428ND - 17.0 ppb
20153.68 ppb16161.30 ppb - 7.60 ppb
20161.33 ppb2420ND - 4.90 ppb
20171.16 ppb166ND - 4.30 ppb
20182.14 ppb1612ND - 4.70 ppb
20191.71 ppb1610ND - 4.30 ppb

ppb = parts per billion

State and national drinking water standards and health guidelines

EWG Health Guideline 0.1 ppb

The EWG Health Guideline of 0.1 ppb for dibromochloromethane 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
2014-03-03680-99084-917.0 ppb
2014-03-03680-99084-8ND
2014-03-03680-99084-917.0 ppb
2014-03-10AD89567ND
2014-03-10AD89567ND
2014-03-14680-99611-14.10 ppb
2014-03-14680-99611-26.80 ppb
2014-03-14680-99611-14.10 ppb
2014-03-14680-99611-26.80 ppb
2014-05-13680-101411-11.90 ppb
2014-05-13680-101411-29.30 ppb
2014-05-13680-101411-11.90 ppb
2014-05-13680-101411-29.30 ppb
2014-06-10680-102329-1ND
2014-06-10680-102329-213.0 ppb
2014-06-10680-102329-1ND
2014-06-10680-102329-213.0 ppb
2014-08-18680-104449-152.10 ppb
2014-08-18680-104449-1612.0 ppb
2014-08-18680-104449-152.10 ppb
2014-08-18680-104449-1612.0 ppb
2014-09-09680-105291-11.50 ppb
2014-09-09680-105291-26.80 ppb
2014-09-09680-105291-11.50 ppb
2014-09-09680-105291-26.80 ppb
2014-11-06680-107124-52.70 ppb
2014-11-06680-107124-65.80 ppb
2014-11-06680-107124-52.70 ppb
2014-11-06680-107124-65.80 ppb
2014-12-08680-108093-13.10 ppb
2014-12-08680-108093-28.30 ppb
2014-12-08680-108093-13.10 ppb
2014-12-08680-108093-28.30 ppb
2015-03-09680-110691-11.30 ppb
2015-03-09680-110691-22.20 ppb
2015-03-09680-110691-11.30 ppb
2015-03-09680-110691-22.20 ppb
2015-06-18680-113759-11.60 ppb
2015-06-18680-113759-27.50 ppb
2015-06-18680-113759-11.60 ppb
2015-06-18680-113759-27.50 ppb
2015-09-14680-116756-15.30 ppb
2015-09-14680-116756-27.60 ppb
2015-09-14680-116756-15.30 ppb
2015-09-14680-116756-27.60 ppb
2015-12-28680-120465-12.00 ppb
2015-12-28680-120465-21.90 ppb
2015-12-28680-120465-12.00 ppb
2015-12-28680-120465-21.90 ppb
2016-03-10680-122911-10.550 ppb
2016-03-10680-122911-23.00 ppb
2016-03-10680-122911-10.550 ppb
2016-03-10680-122911-23.00 ppb
2016-06-07680-126259-12.00 ppb
2016-06-07680-126259-2ND
2016-06-07680-126259-12.00 ppb
2016-06-07680-126259-2ND
2016-06-22680-126792-10.880 ppb
2016-06-22680-126792-20.720 ppb
2016-06-22680-126792-10.880 ppb
2016-06-22680-126792-20.720 ppb
2016-09-06680-129536-10.950 ppb
2016-09-06680-129536-2ND
2016-09-06680-129536-10.950 ppb
2016-09-06680-129536-2ND
2016-09-14680-129853-10.540 ppb
2016-09-14680-129853-20.370 ppb
2016-09-14680-129853-10.540 ppb
2016-09-14680-129853-20.370 ppb
2016-12-06680-132851-14.90 ppb
2016-12-06680-132851-22.10 ppb
2016-12-06680-132851-14.90 ppb
2016-12-06680-132851-22.10 ppb
2017-03-1735301472003ND
2017-03-1735301472004ND
2017-03-1735301472003ND
2017-03-1735301472004ND
2017-06-0235315770007ND
2017-06-0235315770008ND
2017-06-0235315770007ND
2017-06-0235315770008ND
2017-09-27353389350114.30 ppb
2017-09-27353389350124.10 ppb
2017-09-27353389350114.30 ppb
2017-09-27353389350124.10 ppb
2017-12-1435363762001ND
2017-12-14353637620020.850 ppb
2017-12-1435363762001ND
2017-12-14353637620020.850 ppb
2018-03-0935379170001ND
2018-03-0935379170002ND
2018-03-0935379170001ND
2018-03-0935379170002ND
2018-06-08353972550012.00 ppb
2018-06-08353972550022.10 ppb
2018-06-08353972550012.00 ppb
2018-06-08353972550022.10 ppb
2018-09-21354195420034.70 ppb
2018-09-21354195420044.60 ppb
2018-09-21354195420034.70 ppb
2018-09-21354195420044.60 ppb
2018-12-06354358500012.20 ppb
2018-12-06354358500021.50 ppb
2018-12-06354358500012.20 ppb
2018-12-06354358500021.50 ppb
2019-03-0735452895001ND
2019-03-07354528950021.60 ppb
2019-03-0735452895001ND
2019-03-07354528950021.60 ppb
2019-06-0535473738001ND
2019-06-0535473738002ND
2019-06-0535473738001ND
2019-06-0535473738002ND
2019-09-09354963150012.70 ppb
2019-09-09354963150021.10 ppb
2019-09-09354963150012.70 ppb
2019-09-09354963150021.10 ppb
2019-12-13355201000014.30 ppb
2019-12-13355201000024.00 ppb
2019-12-13355201000014.30 ppb
2019-12-13355201000024.00 ppb