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EWG's Tap Water Database — 2021 UPDATE

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Bromoform

Snoqualmie Water

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

 

38

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
2014ND80ND
2015ND160ND
2016ND40ND
2017ND20ND
2018ND60ND
2019ND20ND

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
2014-01-2173292ND
2014-01-2273293ND
2014-04-2373491ND
2014-04-2373492ND
2014-07-2273818ND
2014-07-2273819ND
2014-10-2174417ND
2014-10-2174416ND
2015-01-2074711ND
2015-01-2074713ND
2015-01-2074712ND
2015-01-2074714ND
2015-04-2174944ND
2015-04-2174943ND
2015-04-2174941ND
2015-04-2174942ND
2015-07-2175206ND
2015-07-2175204ND
2015-07-2175207ND
2015-07-2175205ND
2015-10-2775615ND
2015-10-2775616ND
2015-10-2775617ND
2015-10-2775614ND
2016-01-19ND
2016-01-19ND
2016-01-19ND
2016-01-20ND
2017-06-14ND
2017-06-14ND
2018-05-22ND
2018-05-23ND
2018-05-23ND
2018-05-23ND
2018-05-23ND
2018-08-08ND
2019-08-06ND
2019-08-07ND