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EWG's Tap Water Database — 2021 UPDATE

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Bromoform

Morris Chase/morris Hunt Pcws

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

 

24

Samples

0

Samples exceeding legal limit (MCL)

3

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND20ND
20150.250 ppb21ND - 0.500 ppb
2016ND50ND
20170.1000 ppb61ND - 0.600 ppb
20180.300 ppb51ND - 1.50 ppb
20190.250 ppb41ND - 1.000 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
2014-09-2226838201ND
2014-09-2226838101ND
2015-09-22302178010.500 ppb
2015-09-2230217701ND
2016-06-14360614177ND
2016-08-17360817122ND
2016-09-13360913173ND
2016-09-13360913174ND
2016-10-27361027101ND
2017-03-22370322081ND
2017-05-243705241110.600 ppb
2017-07-25370725099ND
2017-09-20370920229ND
2017-09-26370926071ND
2017-11-08371108148ND
2018-03-20380320182ND
2018-06-13380613162ND
2018-07-183807181861.50 ppb
2018-09-26380926166ND
2018-10-16381016237ND
2019-01-153901151961.000 ppb
2019-04-16390417218ND
2019-07-25390725041ND
2019-10-16391016246ND