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EWG's Tap Water Database — 2019 UPDATE

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Bromoform

North Texas Municipal Water District Tawakoni Water Treatment Plant

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.

 

12

Samples

0

Samples exceeding legal limit (MCL)

3

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012ND20ND
20130.500 ppb21ND - 1.000 ppb
20141.69 ppb221.57 ppb - 1.80 ppb
2015ND20ND
2016ND20ND
2017ND20ND

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
2012-12-121212559004ND
2012-12-121212559010ND
2013-08-20Q13058070061.000 ppb
2013-08-20Q1305807003ND
2014-09-26Q14490910011.80 ppb
2014-11-10Q14552840041.57 ppb
2015-05-28Q1519648011ND
2015-05-28Q1519648001ND
2016-05-25Q1620796004ND
2016-05-25Q1620796006ND
2017-06-27Q1726831006ND
2017-06-27Q1726831005ND