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EWG's Tap Water Database — 2021 UPDATE

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Bromoform

Harris County Municipal Utility District 372

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

 

24

Samples

0

Samples exceeding legal limit (MCL)

11

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20140.625 ppb42ND - 1.50 ppb
20151.50 ppb43ND - 3.40 ppb
2016ND40ND
20170.325 ppb41ND - 1.30 ppb
20180.650 ppb41ND - 2.60 ppb
20192.00 ppb441.50 ppb - 2.40 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
2014-03-11AC46474ND
2014-05-21AC548581.50 ppb
2014-07-09AC59153ND
2014-12-17AC752991.000 ppb
2015-03-12AC840731.30 ppb
2015-05-19AC925611.30 ppb
2015-09-15AD07107ND
2015-12-10AD164993.40 ppb
2016-03-22AD29872ND
2016-06-27AD41867ND
2016-09-08AD48434ND
2016-11-17AD58554ND
2017-01-17AD650851.30 ppb
2017-04-20AD80383ND
2017-07-24AD90357ND
2017-11-09AE04329ND
2018-01-11AE08923ND
2018-04-03AE21008ND
2018-07-09AE32615ND
2018-10-10AE431072.60 ppb
2019-02-13AE543412.10 ppb
2019-04-04AE612041.50 ppb
2019-07-08AE734312.00 ppb
2019-12-13AE924312.40 ppb