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EWG's Tap Water Database — 2021 UPDATE

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Bromoform

Northwest Park MUD

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

 

29

Samples

0

Samples exceeding legal limit (MCL)

2

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013N/A00N/A
2014ND20ND
2015ND50ND
2016ND60ND
20170.250 ppb61ND - 1.50 ppb
2018ND50ND
20190.560 ppb51ND - 2.80 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
2014-06-06AC56310ND
2014-06-06AC56302ND
2015-09-15AD07054ND
2015-09-15AD07059ND
2015-09-15AD07117ND
2015-09-15AD07121ND
2015-09-15AD07133ND
2016-08-03AD46812ND
2016-08-03AD46813ND
2016-08-03AD46879ND
2016-08-03AD46881ND
2016-08-03AD46883ND
2016-11-15AD58081ND
2017-04-28AD81834ND
2017-04-28AD81840ND
2017-04-28AD81862ND
2017-04-28AD818541.50 ppb
2017-08-08AD92374ND
2017-08-08AD92388ND
2018-06-07AE28964ND
2018-06-07AE28967ND
2018-06-07AE29031ND
2018-06-07AE29025ND
2018-06-07AE29027ND
2019-07-25AE75940ND
2019-07-25AE75936ND
2019-07-25AE76005ND
2019-07-25AE76007ND
2019-12-19AE928752.80 ppb