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EWG's Tap Water Database — 2021 UPDATE

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Bromoform

Waterpro Inc

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.

MORE ABOUT THIS CONTAMINANT

 

100

Samples

0

Samples exceeding legal limit (MCL)

22

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013N/A00N/A
20140.492 ppb124ND - 2.00 ppb
20150.818 ppb178ND - 2.70 ppb
20160.144 ppb183ND - 1.10 ppb
2017ND170ND
20180.376 ppb177ND - 1.50 ppb
20190.0579 ppb191ND - 1.10 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 Result
2014-06-17ND
2014-06-17ND
2014-06-17ND
2014-06-17ND
2014-09-172.00 ppb
2014-09-171.20 ppb
2014-09-171.40 ppb
2014-09-171.30 ppb
2014-12-17ND
2014-12-17ND
2014-12-17ND
2014-12-17ND
2015-03-24ND
2015-03-24ND
2015-03-24ND
2015-03-24ND
2015-06-222.50 ppb
2015-06-221.80 ppb
2015-06-221.20 ppb
2015-06-222.70 ppb
2015-08-11ND
2015-09-22ND
2015-09-22ND
2015-09-22ND
2015-09-22ND
2015-12-090.700 ppb
2015-12-091.20 ppb
2015-12-091.40 ppb
2015-12-092.40 ppb
2016-03-17ND
2016-03-17ND
2016-03-17ND
2016-03-17ND
2016-06-06ND
2016-06-27ND
2016-06-27ND
2016-06-270.900 ppb
2016-06-27ND
2016-07-131.10 ppb
2016-09-210.600 ppb
2016-09-21ND
2016-09-21ND
2016-09-21ND
2016-12-12ND
2016-12-12ND
2016-12-12ND
2016-12-12ND
2017-03-13ND
2017-03-13ND
2017-03-13ND
2017-03-13ND
2017-06-19ND
2017-06-19ND
2017-06-19ND
2017-06-19ND
2017-07-19ND
2017-09-20ND
2017-09-20ND
2017-09-20ND
2017-09-20ND
2017-12-18ND
2017-12-18ND
2017-12-18ND
2017-12-18ND
2018-03-14ND
2018-03-14ND
2018-03-14ND
2018-03-14ND
2018-06-250.500 ppb
2018-06-250.600 ppb
2018-06-250.600 ppb
2018-06-250.600 ppb
2018-08-08ND
2018-09-241.30 ppb
2018-09-241.50 ppb
2018-09-24ND
2018-09-241.30 ppb
2018-12-10ND
2018-12-10ND
2018-12-10ND
2018-12-10ND
2019-03-25ND
2019-03-25ND
2019-03-25ND
2019-03-25ND
2019-06-24ND
2019-06-24ND
2019-06-24ND
2019-06-24ND
2019-07-09ND
2019-07-09ND
2019-07-09ND
2019-09-09ND
2019-09-09ND
2019-09-091.10 ppb
2019-09-09ND
2019-12-17ND
2019-12-17ND
2019-12-17ND
2019-12-17ND