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EWG's Tap Water Database — 2021 UPDATE

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Bromoform

Harris County Municipal Utility District 158

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.

 

19

Samples

0

Samples exceeding legal limit (MCL)

6

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results

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
2014-08-06AC623894.80 ppb
2014-12-22AC75615ND
2015-02-23AC81411ND
2015-06-04AC94716ND
2015-09-23AD08200ND
2015-12-07AD156583.90 ppb
2016-03-28AD30675ND
2016-06-07AD39547ND
2016-09-27AD51474ND
2016-11-21AD58769ND
2017-02-07AD69158ND
2017-05-10AD836381.30 ppb
2017-08-15AD93024ND
2017-11-20AE053681.10 ppb
2018-02-08AE12995ND
2018-05-08AE25529ND
2018-08-01AE352921.80 ppb
2019-05-29AE68383ND
2019-05-29AE683821.000 ppb