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EWG's Tap Water Database — 2019 UPDATE

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Bromoform

North Texas Municipal Water District - Bonham 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.

 

17

Samples

0

Samples exceeding legal limit (MCL)

1

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012ND50ND
2013ND40ND
2014ND20ND
2015ND20ND
20160.865 ppb21ND - 1.73 ppb
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
2012-03-051203120004ND
2012-06-041206070003ND
2012-08-211208A51005ND
2012-08-211208A51002ND
2012-12-061212342001ND
2013-03-071303267008ND
2013-06-11Q1302143002ND
2013-09-09Q1306727004ND
2013-09-09Q1306727002ND
2014-07-09Q1427045003ND
2014-07-09Q1427045001ND
2015-05-19Q1518440006ND
2015-09-02Q1533998002ND
2016-07-27Q1630662011ND
2016-07-27Q16306620021.73 ppb
2017-06-14Q1725114001ND
2017-08-07Q1732975002ND