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EWG's Tap Water Database — 2021 UPDATE

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Bromoform

Harris County Municipal Utility District 136

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

 

29

Samples

0

Samples exceeding legal limit (MCL)

5

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20141.03 ppb43ND - 2.10 ppb
2015ND50ND
2016ND50ND
20170.200 ppb51ND - 1.000 ppb
2018ND50ND
20190.280 ppb51ND - 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
2014-02-17AC430511.000 ppb
2014-06-09AC56294ND
2014-07-30AC616272.10 ppb
2014-11-19AC724621.000 ppb
2015-02-26AC82053ND
2015-05-19AC92537ND
2015-05-19AC92633ND
2015-08-04AD02316ND
2015-10-08AD09990ND
2016-02-01AD21036ND
2016-02-01AD21071ND
2016-04-26AD34162ND
2016-09-24AD50993ND
2016-10-17AD53386ND
2017-01-24AD66423ND
2017-01-24AD664761.000 ppb
2017-04-18AD79937ND
2017-07-24AD90279ND
2017-10-17AE01067ND
2018-02-08AE13013ND
2018-02-08AE13047ND
2018-05-08AE25558ND
2018-08-01AE35289ND
2018-10-24AE44467ND
2019-01-28AE51613ND
2019-01-28AE51696ND
2019-04-23AE633681.40 ppb
2019-07-30AE76386ND
2019-10-10AE86289ND