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EWG's Tap Water Database — 2021 UPDATE

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Bromoform

Washington Water Authority WWA

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

 

92

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
2014ND160ND
2015ND160ND
2016ND160ND
2017ND160ND
2018ND160ND
2019ND120ND

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
2014-02-1814051010802ND
2014-02-1814051010602ND
2014-02-1814051010702ND
2014-02-1814051010902ND
2014-05-0514128014302ND
2014-05-0514128014002ND
2014-05-0514128014202ND
2014-05-0514128014102ND
2014-08-0614219003202ND
2014-08-0614219005702ND
2014-08-0614219003302ND
2014-08-1314227000502ND
2014-10-2914304001502ND
2014-10-2914304001602ND
2014-10-2914304001802ND
2014-10-2914304001702ND
2015-01-2715029003402ND
2015-01-2715029003602ND
2015-01-2715029003702ND
2015-01-2715029003502ND
2015-04-2815120007502ND
2015-04-2815120007402ND
2015-04-2815120007602ND
2015-04-2815120007702ND
2015-07-3015212003402ND
2015-07-3015212003502ND
2015-07-3015212003602ND
2015-07-3015212003702ND
2015-10-2715303001602ND
2015-10-2715303001502ND
2015-10-2715303001702ND
2015-10-2715303001802ND
2016-01-2616029004602ND
2016-01-2616029004802ND
2016-01-2616029004902ND
2016-01-2616029004702ND
2016-04-2616119008202ND
2016-04-2616119008302ND
2016-04-2616119008402ND
2016-04-2616119008502ND
2016-07-2616210003902ND
2016-07-2616210004002ND
2016-07-2616210003802ND
2016-07-2616210004102ND
2016-10-2616301005302ND
2016-10-2616301005402ND
2016-10-2616301005202ND
2016-10-2616301005502ND
2017-01-2617027001602ND
2017-01-2617027001302ND
2017-01-2617027001502ND
2017-01-2617027001402ND
2017-04-1717110006102ND
2017-04-1717110006002ND
2017-04-1717110006202ND
2017-04-1717110006302ND
2017-07-1917202001702ND
2017-07-1917202001602ND
2017-07-1917202001502ND
2017-07-1917202001402ND
2017-10-1817293003702ND
2017-10-1817293003602ND
2017-10-1817293003502ND
2017-10-1817293003402ND
2018-02-1418046006302ND
2018-02-1418046006602ND
2018-02-1418046006502ND
2018-02-1418046006402ND
2018-04-2418116006602ND
2018-04-2418116006402ND
2018-04-2418116006302ND
2018-04-2418116006502ND
2018-07-2318207009802ND
2018-07-2318207009902ND
2018-07-2318207010002ND
2018-07-2318207009702ND
2018-10-2418298010202ND
2018-10-2418298010402ND
2018-10-2418298010102ND
2018-10-2418298010302ND
2019-01-3019031012702ND
2019-01-3019031012802ND
2019-01-3019031012602ND
2019-01-3119031012902ND
2019-04-1719109000802ND
2019-04-1719109001002ND
2019-04-1719109000902ND
2019-04-1719109000702ND
2019-07-1619199007902ND
2019-07-1619199008102ND
2019-07-1619199008202ND
2019-07-1619199008002ND