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EWG's Tap Water Database — 2021 UPDATE

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Bromoform

West Winn Water System 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

 

106

Samples

0

Samples exceeding legal limit (MCL)

4

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND260ND
2015ND160ND
2016ND160ND
201721.1 ppb164ND - 95.9 ppb
2018ND160ND
2019ND160ND

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
2014-02-03AD88837ND
2014-02-03AD88838ND
2014-02-03AD88839ND
2014-02-03AD88840ND
2014-02-03AD88841ND
2014-02-03AD88837ND
2014-02-03AD88838ND
2014-02-03AD88839ND
2014-02-03AD88840ND
2014-02-03AD88841ND
2014-02-191279274ND
2014-02-191279275ND
2014-02-191279274ND
2014-02-191279275ND
2014-02-24AD89381ND
2014-02-24AD89382ND
2014-02-24AD89381ND
2014-02-24AD89382ND
2014-05-211303443ND
2014-05-211303444ND
2014-05-211303443ND
2014-05-211303444ND
2014-12-101356557ND
2014-12-101356558ND
2014-12-101356557ND
2014-12-101356558ND
2015-02-191373912ND
2015-02-191373913ND
2015-02-191373912ND
2015-02-191373913ND
2015-05-221397735ND
2015-05-221397736ND
2015-05-221397735ND
2015-05-221397736ND
2015-08-171420006ND
2015-08-171420007ND
2015-08-171420006ND
2015-08-171420007ND
2015-11-231446348ND
2015-11-231446349ND
2015-11-231446348ND
2015-11-231446349ND
2016-02-151467779ND
2016-02-151467780ND
2016-02-151467779ND
2016-02-151467780ND
2016-05-181492484ND
2016-05-181492485ND
2016-05-181492484ND
2016-05-181492485ND
2016-08-171516798ND
2016-08-171516799ND
2016-08-171516798ND
2016-08-171516799ND
2016-11-301544403ND
2016-11-301544404ND
2016-11-301544403ND
2016-11-301544404ND
2017-02-1635296089009ND
2017-02-1635296089010ND
2017-02-1635296089009ND
2017-02-1635296089010ND
2017-05-093531161001772.6 ppb
2017-05-093531161001895.9 ppb
2017-05-093531161001772.6 ppb
2017-05-093531161001895.9 ppb
2017-08-1535331068014ND
2017-08-1535331068015ND
2017-08-1535331068014ND
2017-08-1535331068015ND
2017-11-0735347274001ND
2017-11-0735347274002ND
2017-11-0735347274001ND
2017-11-0735347274002ND
2018-02-1435374357001ND
2018-02-1435374357002ND
2018-02-1435374357001ND
2018-02-1435374357002ND
2018-05-2435394499001ND
2018-05-2435394499002ND
2018-05-2435394499001ND
2018-05-2435394499002ND
2018-08-2235413400001ND
2018-08-2235413400002ND
2018-08-2235413400001ND
2018-08-2235413400002ND
2018-11-2035432722001ND
2018-11-2035432722002ND
2018-11-2035432722001ND
2018-11-2035432722002ND
2019-02-1835450015001ND
2019-02-1835450015002ND
2019-02-1835450015001ND
2019-02-1835450015002ND
2019-05-2035470502001ND
2019-05-2035470502002ND
2019-05-2035470502001ND
2019-05-2035470502002ND
2019-08-1935492780001ND
2019-08-1935492780002ND
2019-08-1935492780001ND
2019-08-1935492780002ND
2019-11-1935514433001ND
2019-11-1935514433002ND
2019-11-1935514433001ND
2019-11-1935514433002ND