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EWG's Tap Water Database — 2019 UPDATE

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Bromoform

Penn State Univ.

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.

 

37

Samples

0

Samples exceeding legal limit (MCL)

7

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20120.125 ppb41ND - 0.500 ppb
20130.324 ppb82ND - 2.09 ppb
20140.137 ppb163ND - 0.940 ppb
20150.550 ppb21ND - 1.10 ppb
20160.583 ppb41ND - 2.33 ppb
20170.440 ppb31ND - 1.32 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
2012-08-152H15054ND
2012-08-152H150540.500 ppb
2012-08-152H15054ND
2012-08-152H15054ND
2013-08-123H120382.09 ppb
2013-08-123H12038ND
2013-08-123H12038ND
2013-08-123H12038ND
2013-11-133K13069-01ND
2013-11-133K13069-030.500 ppb
2013-11-133K13069-02ND
2013-11-133K13069-04ND
2014-02-134B13064-01ND
2014-02-134B13064-03ND
2014-02-134B13064-02ND
2014-02-134B13064-040.680 ppb
2014-05-154E15061-01ND
2014-05-154E15061-02ND
2014-05-154E15061-040.570 ppb
2014-05-154E15061-03ND
2014-08-144H14120-01ND
2014-08-144H14120-02ND
2014-08-144H14120-040.940 ppb
2014-08-144H14120-03ND
2014-11-134K13101-04ND
2014-11-134K13101-03ND
2014-11-134K13101-01ND
2014-11-134K13101-02ND
2015-02-1212446996ND
2015-08-13131851011.10 ppb
2016-02-2513917132ND
2016-08-2514804554ND
2016-09-02149755472.33 ppb
2016-11-2315282670ND
2017-03-13158505461.32 ppb
2017-08-2416629495ND
2017-11-2217077351ND