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EWG's Tap Water Database — 2019 UPDATE

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Bromoform

West Sound Utility District #1

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.

 

25

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012ND70ND
2013ND70ND
2014ND20ND
2015ND20ND
2016ND20ND
2017ND50ND

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
2012-07-2328621ND
2012-07-2328622ND
2012-07-2328619ND
2012-07-2328623ND
2012-07-2328624ND
2012-07-2328620ND
2012-07-2328625ND
2013-07-2230130ND
2013-07-2230126ND
2013-07-2230128ND
2013-07-2230132ND
2013-07-2230129ND
2013-07-2230127ND
2013-07-2230131ND
2014-07-0901888ND
2014-07-0901886ND
2015-07-1702939ND
2015-07-1702938ND
2016-07-12ND
2016-07-12ND
2017-06-29ND
2017-06-29ND
2017-06-29ND
2017-07-24ND
2017-07-24ND