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EWG's Tap Water Database — 2021 UPDATE

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Bromoform

St. Charles County PWSD 2

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

 

124

Samples

0

Samples exceeding legal limit (MCL)

12

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013N/A00N/A
20140.0503 ppb333ND - 0.620 ppb
20150.0850 ppb203ND - 0.620 ppb
2016ND150ND
20170.0696 ppb243ND - 0.640 ppb
20180.0694 ppb162ND - 0.600 ppb
20190.0769 ppb162ND - 0.630 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
2014-02-20AC18266ND
2014-02-20AC18268ND
2014-02-20AC18269ND
2014-02-20AC18270ND
2014-02-20AC18273ND
2014-02-21AC18267ND
2014-02-21AC18271ND
2014-02-21AC18272ND
2014-06-06AC28805ND
2014-06-06AC28806ND
2014-06-06AC28801ND
2014-06-06AC288020.620 ppb
2014-06-06AC28803ND
2014-06-06AC288040.530 ppb
2014-06-06AC28807ND
2014-06-06AC28808ND
2014-09-17AC349780.510 ppb
2014-09-17AC33498ND
2014-09-17AC33499ND
2014-09-17AC33500ND
2014-09-17AC33501ND
2014-09-17AC33502ND
2014-09-17AC33503ND
2014-09-17AC33504ND
2014-09-17AC33505ND
2014-12-02AC38322ND
2014-12-02AC38323ND
2014-12-02AC38324ND
2014-12-02AC38325ND
2014-12-02AC38326ND
2014-12-02AC38327ND
2014-12-02AC38328ND
2014-12-02AC38329ND
2015-02-25AC42050ND
2015-02-25AC42052ND
2015-02-25AC42055ND
2015-02-25AC42051ND
2015-02-25AC42053ND
2015-02-25AC42054ND
2015-02-25AC42056ND
2015-02-25AC42049ND
2015-06-02AC46603ND
2015-06-02AC46601ND
2015-06-02AC466040.580 ppb
2015-06-02AC466020.620 ppb
2015-09-03AC57583ND
2015-09-03AC575840.500 ppb
2015-09-03AC57585ND
2015-09-03AC57586ND
2015-12-01AC62868ND
2015-12-01AC62870ND
2015-12-01AC62869ND
2015-12-01AC62867ND
2016-03-02AC66413ND
2016-03-02AC66415ND
2016-03-07AC66416ND
2016-06-02AC72107ND
2016-06-02AC72110ND
2016-06-02AC72109ND
2016-06-14AC77550ND
2016-08-09AC81759ND
2016-08-09AC81758ND
2016-08-09AC81761ND
2016-08-09AC81760ND
2016-11-02AC87008ND
2016-11-02AC87009ND
2016-11-02AC87007ND
2016-11-02AC87006ND
2017-02-23AC90856ND
2017-02-23AC908590.510 ppb
2017-02-23AC90857ND
2017-02-23AC90858ND
2017-05-31AC95833ND
2017-05-31AC958340.640 ppb
2017-05-31AC95835ND
2017-05-31AC95836ND
2017-09-07AD07208ND
2017-09-07AD07209ND
2017-09-07AD07210ND
2017-09-07AD07207ND
2017-09-07AD035870.520 ppb
2017-09-07AD03586ND
2017-09-07AD03588ND
2017-09-07AD03589ND
2017-12-12AD11059ND
2017-12-12AD11062ND
2017-12-12AD11061ND
2017-12-12AD11060ND
2017-12-19AD11069ND
2017-12-19AD11070ND
2017-12-19AD11071ND
2017-12-19AD11068ND
2018-02-22AD14332ND
2018-02-22AD14334ND
2018-02-22AD14335ND
2018-03-08AD17559ND
2018-05-24AD20559ND
2018-05-24AD205600.600 ppb
2018-05-24AD20561ND
2018-05-24AD205620.510 ppb
2018-08-30AD31371ND
2018-08-30AD31374ND
2018-08-30AD31372ND
2018-08-30AD31373ND
2018-11-19AD35769ND
2018-11-19AD35770ND
2018-11-19AD35771ND
2018-11-19AD35772ND
2019-02-26AD39437ND
2019-02-26AD39438ND
2019-02-26AD39439ND
2019-02-26AD39440ND
2019-05-21AD475160.630 ppb
2019-05-21AD47517ND
2019-05-21AD475180.600 ppb
2019-06-06AD49751ND
2019-09-03AD54111ND
2019-09-03AD54108ND
2019-09-03AD54109ND
2019-09-03AD54110ND
2019-12-09AD59325ND
2019-12-09AD59322ND
2019-12-09AD59323ND
2019-12-09AD59324ND