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EWG's Tap Water Database — 2019 UPDATE

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Bromoform

Holden Water Division, DPW

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.

 

194

Samples

0

Samples exceeding legal limit (MCL)

4

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012ND160ND
2013ND160ND
2014ND160ND
20150.0492 ppb484ND - 0.620 ppb
2016ND500ND
2017ND480ND

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 Result
2012-01-05ND
2012-01-05ND
2012-05-08ND
2012-05-08ND
2012-05-08ND
2012-05-08ND
2012-05-08ND
2012-05-08ND
2012-05-08ND
2012-05-08ND
2012-06-11ND
2012-06-11ND
2012-08-22ND
2012-08-22ND
2012-11-20ND
2012-11-20ND
2013-02-20ND
2013-02-20ND
2013-05-16ND
2013-05-16ND
2013-05-16ND
2013-05-16ND
2013-05-16ND
2013-05-16ND
2013-05-16ND
2013-05-16ND
2013-05-16ND
2013-05-16ND
2013-08-21ND
2013-08-21ND
2013-11-18ND
2013-11-18ND
2014-02-18ND
2014-02-18ND
2014-05-20ND
2014-05-20ND
2014-05-20ND
2014-05-20ND
2014-05-20ND
2014-05-20ND
2014-05-20ND
2014-05-20ND
2014-05-20ND
2014-05-20ND
2014-08-20ND
2014-08-20ND
2014-11-19ND
2014-11-19ND
2015-02-18ND
2015-02-18ND
2015-02-18ND
2015-02-18ND
2015-02-18ND
2015-02-18ND
2015-02-18ND
2015-02-18ND
2015-02-18ND
2015-02-18ND
2015-05-19ND
2015-05-19ND
2015-05-19ND
2015-05-19ND
2015-05-19ND
2015-05-19ND
2015-05-19ND
2015-05-19ND
2015-05-19ND
2015-05-19ND
2015-05-19ND
2015-05-19ND
2015-05-19ND
2015-05-19ND
2015-05-190.620 ppb
2015-05-190.620 ppb
2015-05-19ND
2015-05-19ND
2015-08-18ND
2015-08-18ND
2015-08-180.560 ppb
2015-08-180.560 ppb
2015-08-18ND
2015-08-18ND
2015-08-18ND
2015-08-18ND
2015-08-18ND
2015-08-18ND
2015-11-17ND
2015-11-17ND
2015-11-17ND
2015-11-17ND
2015-11-17ND
2015-11-17ND
2015-11-17ND
2015-11-17ND
2015-11-17ND
2015-11-17ND
2016-02-02ND
2016-02-02ND
2016-02-16ND
2016-02-16ND
2016-02-16ND
2016-02-16ND
2016-02-16ND
2016-02-16ND
2016-02-16ND
2016-02-16ND
2016-02-16ND
2016-02-16ND
2016-05-17ND
2016-05-17ND
2016-05-17ND
2016-05-17ND
2016-05-17ND
2016-05-17ND
2016-05-17ND
2016-05-17ND
2016-05-17ND
2016-05-17ND
2016-05-17ND
2016-05-17ND
2016-05-17ND
2016-05-17ND
2016-05-17ND
2016-05-17ND
2016-05-17ND
2016-05-17ND
2016-08-16ND
2016-08-16ND
2016-08-16ND
2016-08-16ND
2016-08-16ND
2016-08-16ND
2016-08-16ND
2016-08-16ND
2016-09-06ND
2016-09-06ND
2016-11-15ND
2016-11-15ND
2016-11-15ND
2016-11-15ND
2016-11-15ND
2016-11-15ND
2016-11-15ND
2016-11-15ND
2016-11-15ND
2016-11-15ND
2017-02-21ND
2017-02-21ND
2017-02-21ND
2017-02-21ND
2017-02-21ND
2017-02-21ND
2017-02-21ND
2017-02-21ND
2017-02-21ND
2017-02-21ND
2017-05-16ND
2017-05-16ND
2017-05-16ND
2017-05-16ND
2017-05-16ND
2017-05-16ND
2017-05-16ND
2017-05-16ND
2017-05-16ND
2017-05-16ND
2017-05-16ND
2017-05-16ND
2017-05-16ND
2017-05-16ND
2017-05-16ND
2017-05-16ND
2017-05-16ND
2017-05-16ND
2017-08-15ND
2017-08-15ND
2017-08-15ND
2017-08-15ND
2017-08-15ND
2017-08-15ND
2017-08-15ND
2017-08-15ND
2017-08-16ND
2017-08-16ND
2017-11-21ND
2017-11-21ND
2017-11-21ND
2017-11-21ND
2017-11-21ND
2017-11-21ND
2017-11-21ND
2017-11-21ND
2017-11-21ND
2017-11-21ND