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EWG's Tap Water Database — 2021 UPDATE

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Bromoform

Douglas

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

 

102

Samples

0

Samples exceeding legal limit (MCL)

10

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND210ND
2015ND160ND
20160.162 ppb123ND - 0.710 ppb
20170.0767 ppb213ND - 0.570 ppb
20180.495 ppb164ND - 2.56 ppb
2019ND160ND

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
2014-01-23AI27073ND
2014-01-23AI27074ND
2014-01-23AI27075ND
2014-01-23AI27076ND
2014-04-30AI39261ND
2014-04-30AI39262ND
2014-04-30AI39263ND
2014-04-30AI39264ND
2014-07-31AI47705ND
2014-07-31AI47706ND
2014-07-31AI47707ND
2014-07-31AI47708ND
2014-08-27AI51584ND
2014-08-27AI51585ND
2014-08-27AI51586ND
2014-08-27AI51587ND
2014-08-27AI51588ND
2014-10-22AI58155ND
2014-10-22AI58156ND
2014-10-22AI58157ND
2014-10-22AI58158ND
2015-01-26AI63430ND
2015-01-26AI63431ND
2015-01-26AI63432ND
2015-01-26AI63433ND
2015-04-23AI75571ND
2015-04-23AI75572ND
2015-04-23AI75573ND
2015-04-23AI75574ND
2015-07-27AI84228ND
2015-07-27AI84229ND
2015-07-27AI84230ND
2015-07-27AI84231ND
2015-10-21AI99636ND
2015-10-21AI99637ND
2015-10-21AI99638ND
2015-10-21AI99639ND
2016-01-26AJ05014ND
2016-01-26AJ05015ND
2016-01-26AJ05016ND
2016-01-26AJ05017ND
2016-04-18AJ10179ND
2016-04-18AJ10180ND
2016-04-18AJ10181ND
2016-04-18AJ10182ND
2016-07-28159442-010.700 ppb
2016-07-28159442-020.710 ppb
2016-07-28159442-030.530 ppb
2016-07-28159442-04ND
2017-02-22165792-01AND
2017-02-22165792020.510 ppb
2017-02-2216579203ND
2017-02-2216579204ND
2017-05-16168157-01ND
2017-05-16168157-020.570 ppb
2017-05-16168157-030.530 ppb
2017-05-16168157-04ND
2017-08-16170793-01ND
2017-08-16170793-02ND
2017-08-16170793-03ND
2017-08-16170793-04ND
2017-08-17171067-01ND
2017-08-17171068-01ND
2017-08-17171069-01ND
2017-08-17171070-01ND
2017-08-17171071-01ND
2017-11-08173640-01ND
2017-11-08173640-02ND
2017-11-08173640-03ND
2017-11-08173640-04ND
2018-02-22176146-01ND
2018-02-22176146-02ND
2018-02-22176146-03ND
2018-02-22176146-04ND
2018-05-14178624-01ND
2018-05-14178624-02ND
2018-05-14178624-03ND
2018-05-14178624-042.56 ppb
2018-08-13181781-01ND
2018-08-13181781-021.71 ppb
2018-08-13181781-031.94 ppb
2018-08-13181781-041.71 ppb
2018-11-19184617-01ND
2018-11-19184617-02ND
2018-11-19184617-03ND
2018-11-19184617-04ND
2019-02-07187264-01ND
2019-02-07187264-02ND
2019-02-07187264-03ND
2019-02-07187264-04ND
2019-06-25190281-01ND
2019-06-25190281-02ND
2019-06-25190281-03ND
2019-06-25190281-04ND
2019-08-08193791-01ND
2019-08-28193791-02ND
2019-08-28193791-03ND
2019-08-28193791-04ND
2019-12-03197733-01ND
2019-12-03197733-02ND
2019-12-03197733-03ND
2019-12-03197733-04ND