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EWG's Tap Water Database — 2021 UPDATE

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Bromoform

Stow Public Water System

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

 

93

Samples

0

Samples exceeding legal limit (MCL)

4

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND160ND
2015ND160ND
20160.256 ppb164ND - 1.10 ppb
2017ND160ND
2018ND160ND
2019ND130ND

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
2014-01-14AG62948ND
2014-01-14AG62947ND
2014-01-14AG62946ND
2014-01-14AG62945ND
2014-04-08AG68126ND
2014-04-08AG68125ND
2014-04-08AG68124ND
2014-04-08AG68123ND
2014-07-08AG75084ND
2014-07-08AG75085ND
2014-07-08AG75086ND
2014-07-08AG75087ND
2014-10-08AG82807ND
2014-10-08AG82808ND
2014-10-08AG82809ND
2014-10-08AG82810ND
2015-01-1315010774-001ND
2015-01-1315010774-004ND
2015-01-1315010774-003ND
2015-01-1315010774-002ND
2015-04-0815040664-003ND
2015-04-0815040664-002ND
2015-04-0815040664-001ND
2015-04-0815040664-004ND
2015-07-08AH00830ND
2015-07-08AH00831ND
2015-07-08AH00832ND
2015-07-08AH00833ND
2015-10-13AH08120ND
2015-10-13AH08119ND
2015-10-13AH08118ND
2015-10-13AH08117ND
2016-01-12AH13589ND
2016-01-12AH13590ND
2016-01-12AH13591ND
2016-01-12AH13592ND
2016-04-11AH19248ND
2016-04-11AH19249ND
2016-04-11AH19250ND
2016-04-11AH19251ND
2016-07-11AH258091.000 ppb
2016-07-11AH258101.000 ppb
2016-07-11AH258111.000 ppb
2016-07-11AH258121.10 ppb
2016-10-12AH33542ND
2016-10-12AH33541ND
2016-10-12AH33539ND
2016-10-12AH33540ND
2017-01-10AH40337ND
2017-01-10AH40338ND
2017-01-10AH40339ND
2017-01-10AH40336ND
2017-04-10AH46953ND
2017-04-10AH46954ND
2017-04-10AH46955ND
2017-04-10AH46956ND
2017-07-10AH54429ND
2017-07-10AH54428ND
2017-07-10AH54427ND
2017-07-10AH54426ND
2017-10-11AH62232ND
2017-10-11AH62233ND
2017-10-11AH62234ND
2017-10-11AH62235ND
2018-01-10AH68132ND
2018-01-10AH68133ND
2018-01-10AH68134ND
2018-01-10AH68135ND
2018-04-10AH74009ND
2018-04-10AH74007ND
2018-04-10AH74006ND
2018-04-10AH74008ND
2018-07-11AH80726ND
2018-07-11AH80727ND
2018-07-11AH80728ND
2018-07-11AH80729ND
2018-10-10AH88010ND
2018-10-10AH88011ND
2018-10-10AH88012ND
2018-10-10AH88013ND
2019-01-08AH93820ND
2019-01-08AH93822ND
2019-01-08AH93821ND
2019-01-08AH93819ND
2019-04-09AH99770ND
2019-04-09AH99771ND
2019-04-09AH99772ND
2019-04-09AH99773ND
2019-07-09AI06490ND
2019-07-09AI06491ND
2019-07-09AI06492ND
2019-07-09AI06493ND
2019-10-08AI13673ND