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EWG's Tap Water Database — 2021 UPDATE

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Bromoform

Harris County WCID 36

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)

8

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013N/A00N/A
20140.995 ppb196ND - 9.70 ppb
20150.181 ppb162ND - 1.70 ppb
2016ND160ND
2017ND190ND
2018ND160ND
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
2014-02-05AC41527ND
2014-02-05AC41513ND
2014-02-05AC415230.800 ppb
2014-03-19AC47715ND
2014-03-19AC47724ND
2014-03-19AC47713ND
2014-03-19AC47714ND
2014-05-01AC52670ND
2014-05-01AC52671ND
2014-05-01AC52677ND
2014-05-01AC52674ND
2014-07-21AC60381ND
2014-07-21AC603849.70 ppb
2014-07-21AC60366ND
2014-07-21AC60367ND
2014-11-07AC717442.00 ppb
2014-11-07AC716711.70 ppb
2014-11-07AC716913.20 ppb
2014-11-07AC716691.50 ppb
2015-01-27AC77909ND
2015-01-27AC77908ND
2015-01-27AC77897ND
2015-01-27AC77910ND
2015-04-17AC88788ND
2015-04-17AC88772ND
2015-04-17AC88791ND
2015-04-17AC88786ND
2015-09-08AD05813ND
2015-09-08AD058201.20 ppb
2015-09-08AD05812ND
2015-09-08AD058191.70 ppb
2015-12-04AD15657ND
2015-12-04AD15661ND
2015-12-04AD15650ND
2015-12-04AD15714ND
2016-02-03AD21780ND
2016-02-03AD21792ND
2016-02-03AD21779ND
2016-02-03AD21781ND
2016-04-22AD33935ND
2016-04-22AD33934ND
2016-04-22AD33930ND
2016-04-22AD33928ND
2016-09-20AD50319ND
2016-09-20AD50307ND
2016-09-20AD50313ND
2016-09-20AD50317ND
2016-11-16AD58297ND
2016-11-16AD58294ND
2016-11-16AD58295ND
2016-11-16AD58296ND
2017-02-14AD70821ND
2017-02-14AD70820ND
2017-02-14AD70816ND
2017-02-14AD70814ND
2017-04-24AD80727ND
2017-04-24AD80723ND
2017-04-24AD80725ND
2017-04-24AD80634ND
2017-04-24AD80635ND
2017-04-24AD80675ND
2017-04-24AD80657ND
2017-07-28AD91317ND
2017-07-28AD91321ND
2017-07-28AD91320ND
2017-07-28AD91326ND
2017-11-09AE04293ND
2017-11-09AE04290ND
2017-11-09AE04292ND
2017-11-09AE04287ND
2018-01-26AE10918ND
2018-01-26AE10919ND
2018-01-26AE10921ND
2018-01-26AE10920ND
2018-04-16AE22465ND
2018-04-16AE22497ND
2018-04-16AE22464ND
2018-04-16AE22459ND
2018-07-31AE35038ND
2018-07-31AE35040ND
2018-07-31AE35041ND
2018-07-31AE35039ND
2018-10-29AE44716ND
2018-10-29AE44715ND
2018-10-29AE44714ND
2018-10-29AE44713ND
2019-02-05AE52888ND
2019-02-05AE52901ND
2019-02-05AE52887ND
2019-02-05AE52886ND
2019-05-23AE67897ND
2019-05-23AE67917ND
2019-05-23AE67916ND
2019-05-23AE67919ND
2019-08-23AE80563ND
2019-08-23AE80561ND
2019-08-23AE80527ND
2019-08-23AE80528ND
2019-11-15AE89497ND
2019-11-15AE89512ND
2019-11-15AE89496ND
2019-11-15AE89511ND