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EWG's Tap Water Database — 2021 UPDATE

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Bromoform

Shiloh Waterworks District

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

 

24

Samples

0

Samples exceeding legal limit (MCL)

2

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND40ND
2015ND40ND
20160.380 ppb440.360 ppb - 0.400 ppb
2017ND40ND
2018ND40ND
20190.500 ppb440.490 ppb - 0.510 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
2014-08-081324664ND
2014-08-081324663ND
2014-08-081324664ND
2014-08-081324663ND
2015-08-101418292ND
2015-08-101418292ND
2015-08-101418295ND
2015-08-101418295ND
2016-08-0815142450.400 ppb
2016-08-0815142460.360 ppb
2016-08-0815142460.360 ppb
2016-08-0815142450.400 ppb
2017-08-1735331378050ND
2017-08-1735331378050ND
2017-08-1735331378049ND
2017-08-1735331378049ND
2018-08-2835414243002ND
2018-08-2835414243001ND
2018-08-2835414243001ND
2018-08-2835414243002ND
2019-08-26354944550010.490 ppb
2019-08-26354944550020.510 ppb
2019-08-26354944550010.490 ppb
2019-08-26354944550020.510 ppb