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EWG's Tap Water Database — 2021 UPDATE

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Bromoform

Chester Water Authority

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

 

192

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013N/A00N/A
2014ND320ND
2015ND320ND
2016ND320ND
2017ND320ND
2018ND320ND
2019ND320ND

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
2014-02-0714021709-002ND
2014-02-0714021709-001ND
2014-02-0714021709-005ND
2014-02-0714021709-006ND
2014-02-0714021709-008ND
2014-02-0714021709-007ND
2014-02-0714021709-004ND
2014-02-1114021709-003ND
2014-05-1214052890-002ND
2014-05-1214052890-001ND
2014-05-1214052890-005ND
2014-05-1214052890-006ND
2014-05-1214052890-008ND
2014-05-1214052890-007ND
2014-05-1214052890-004ND
2014-05-1314052890-003ND
2014-08-1114081686-002ND
2014-08-1114081686-001ND
2014-08-1114081686-005ND
2014-08-1114081686-006ND
2014-08-1114081686-008ND
2014-08-1114081686-007ND
2014-08-1114081686-004ND
2014-08-1214081686-003ND
2014-11-0714110723-003ND
2014-11-0714110723-002ND
2014-11-0714110723-001ND
2014-11-0714110723-005ND
2014-11-0714110723-006ND
2014-11-0714110723-008ND
2014-11-0714110723-007ND
2014-11-0714110723-004ND
2015-02-1112399423ND
2015-02-1112399417ND
2015-02-1112399411ND
2015-02-1112399435ND
2015-02-1112399441ND
2015-02-1112399453ND
2015-02-1112399447ND
2015-02-1112399429ND
2015-05-0712747577ND
2015-05-0712747571ND
2015-05-0712747565ND
2015-05-0712747589ND
2015-05-0712747595ND
2015-05-0712747607ND
2015-05-0712747601ND
2015-05-0712747583ND
2015-08-1213133578ND
2015-08-1213133572ND
2015-08-1213133566ND
2015-08-1213133590ND
2015-08-1213133596ND
2015-08-1213133608ND
2015-08-1213133602ND
2015-08-1213133584ND
2015-11-0913512162ND
2015-11-0913512156ND
2015-11-0913512174ND
2015-11-0913512180ND
2015-11-0913512192ND
2015-11-0913512186ND
2015-11-0913512168ND
2015-11-1213512198ND
2016-02-0813868223ND
2016-02-0813868217ND
2016-02-0813868241ND
2016-02-0813868247ND
2016-02-0813868259ND
2016-02-0813868253ND
2016-02-0813868235ND
2016-02-0913868229ND
2016-05-1014248225ND
2016-05-1014248267ND
2016-05-1014248249ND
2016-05-1014248261ND
2016-05-1014248243ND
2016-05-1014248230ND
2016-05-1014248237ND
2016-05-1014248258ND
2016-08-0914732732ND
2016-08-0914732774ND
2016-08-0914732762ND
2016-08-0914732738ND
2016-08-0914732750ND
2016-08-0914732744ND
2016-08-0914732756ND
2016-08-0914732768ND
2016-11-0915223842ND
2016-11-0915223818ND
2016-11-0915223836ND
2016-11-0915223806ND
2016-11-0915223824ND
2016-11-0915223812ND
2016-11-0915223800ND
2016-11-0915223830ND
2017-02-0715652745ND
2017-02-0715652763ND
2017-02-0715652769ND
2017-02-0715652775ND
2017-02-0715652751ND
2017-02-0715652757ND
2017-02-0715652781ND
2017-02-2715652788ND
2017-05-0916091663ND
2017-05-0916091668ND
2017-05-0916091638ND
2017-05-0916091648ND
2017-05-0916091643ND
2017-05-0916091653ND
2017-05-0916091658ND
2017-05-1016091673ND
2017-08-0916562820ND
2017-08-0916562838ND
2017-08-0916562856ND
2017-08-0916562832ND
2017-08-0916562850ND
2017-08-0916562863ND
2017-08-0916562845ND
2017-08-0916562827ND
2017-11-0817020815ND
2017-11-0817020791ND
2017-11-0817020809ND
2017-11-0817020821ND
2017-11-0817020785ND
2017-11-0817020827ND
2017-11-0817020803ND
2017-11-0817020797ND
2018-02-082294360003ND
2018-02-082294360002ND
2018-02-082294360001ND
2018-02-082294360005ND
2018-02-082294360006ND
2018-02-082294360008ND
2018-02-082294360007ND
2018-02-082294360004ND
2018-05-082314159003ND
2018-05-082314159002ND
2018-05-082314159001ND
2018-05-082314159005ND
2018-05-082314159006ND
2018-05-082314159008ND
2018-05-082314159007ND
2018-05-082314159004ND
2018-08-102331907003ND
2018-08-102331907002ND
2018-08-102331907001ND
2018-08-102331907005ND
2018-08-102331907006ND
2018-08-102331907008ND
2018-08-102331907007ND
2018-08-102331907004ND
2018-11-072349357003ND
2018-11-072349357002ND
2018-11-072349357001ND
2018-11-072349357006ND
2018-11-072349357008ND
2018-11-072349357007ND
2018-11-072349357004ND
2018-11-082349357005ND
2019-02-123016801003ND
2019-02-123016801002ND
2019-02-123016801001ND
2019-02-123016801005ND
2019-02-123016801006ND
2019-02-123016801008ND
2019-02-123016801007ND
2019-02-123016801004ND
2019-05-163034622003ND
2019-05-163034622002ND
2019-05-163034622001ND
2019-05-163034622005ND
2019-05-163034622006ND
2019-05-163034622008ND
2019-05-163034622007ND
2019-05-163034622004ND
2019-08-073050926003ND
2019-08-073050926002ND
2019-08-073050926001ND
2019-08-073050926005ND
2019-08-073050926007ND
2019-08-073050926006ND
2019-08-073050926004ND
2019-08-123051528001ND
2019-11-073068994003ND
2019-11-073068994002ND
2019-11-073068994001ND
2019-11-073068994005ND
2019-11-073068994006ND
2019-11-073068994008ND
2019-11-073068994007ND
2019-11-073068994004ND