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EWG's Tap Water Database — 2021 UPDATE

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Bromoform

City of Williamsburg

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

 

102

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20140.0294 ppb171ND - 0.500 ppb
2015ND170ND
2016ND170ND
2017ND170ND
2018ND170ND
2019ND170ND

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
2014-03-05E131207949ND
2014-03-05E131207950ND
2014-03-05E131207953ND
2014-03-05E131207955ND
2014-06-03E140304307ND
2014-06-03E140304303ND
2014-06-03E140304305ND
2014-06-11E140602419ND
2014-09-02E1407015190.500 ppb
2014-09-02E140701521ND
2014-09-02E140701524ND
2014-09-02E140701523ND
2014-09-02E140701526ND
2014-12-02E140902697ND
2014-12-02E140902698ND
2014-12-02E140902701ND
2014-12-02E140902699ND
2015-03-02VA010-DCLSND
2015-03-02VA010-DCLSND
2015-03-02VA010-DCLSND
2015-03-02VA010-DCLSND
2015-06-02VA010-DCLSND
2015-06-02VA010-DCLSND
2015-06-02VA010-DCLSND
2015-06-02VA010-DCLSND
2015-07-09VA010-DCLSND
2015-09-08VA010-DCLSND
2015-09-08VA010-DCLSND
2015-09-08VA010-DCLSND
2015-09-08VA010-DCLSND
2015-12-07VA010-DCLSND
2015-12-07VA010-DCLSND
2015-12-07VA010-DCLSND
2015-12-22VA010-DCLSND
2016-03-02E151103479ND
2016-03-02E151103476ND
2016-03-02E151103482ND
2016-03-02E151103477ND
2016-06-23E160607699ND
2016-06-23E160607697ND
2016-06-23E160607700ND
2016-06-23E160607698ND
2016-07-28E160503895ND
2016-09-06E160503898ND
2016-09-06E160503902ND
2016-09-06E160503905ND
2016-09-06E160503904ND
2016-12-08E160907017ND
2016-12-08E160907018ND
2016-12-08E160907011ND
2016-12-08E160907015ND
2017-03-01E161206965ND
2017-03-01E161206964ND
2017-03-01E161206960ND
2017-03-01E161206961ND
2017-06-01E170301734ND
2017-06-01E170301740ND
2017-06-01E170301733ND
2017-06-01E170301737ND
2017-08-1417-14193-VOCND
2017-09-0117-15938-THMND
2017-09-0117-15935-THMND
2017-09-0117-15936-THMND
2017-09-0117-15937-THMND
2017-12-06E170902208ND
2017-12-06E170902210ND
2017-12-06E170902206ND
2017-12-06E170902209ND
2018-03-05E171200395ND
2018-03-05E171200396ND
2018-03-05E171200399ND
2018-03-05E171200401ND
2018-06-11E180302030ND
2018-06-11E180302032ND
2018-06-11E180302033ND
2018-06-11E180302035ND
2018-07-1718-14055-VOCND
2018-09-11E180700437ND
2018-09-11E180700438ND
2018-09-11E180700439ND
2018-09-11E180700441ND
2018-12-11E181003923ND
2018-12-11E181003924ND
2018-12-11E181003926ND
2018-12-11E181003927ND
2019-03-01E190100229ND
2019-03-01E190100231ND
2019-03-01E190100233ND
2019-03-01E190100235ND
2019-06-03E190403635ND
2019-06-03E190403637ND
2019-06-03E190403638ND
2019-06-03E190403639ND
2019-08-0519-13904VOCND
2019-09-03E190705213ND
2019-09-03E190705215ND
2019-09-03E190705217ND
2019-09-03E190705220ND
2019-12-16E191200007ND
2019-12-16E191200009ND
2019-12-16E191200012ND
2019-12-16E191200014ND