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EWG's Tap Water Database — 2021 UPDATE

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Bromoform

Spanaway Water Company

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

 

37

Samples

0

Samples exceeding legal limit (MCL)

3

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20140.133 ppb153ND - 0.700 ppb
2015ND50ND
2016ND40ND
2017ND20ND
2018ND50ND
2019ND60ND

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
2014-03-11734160.600 ppb
2014-03-1173419ND
2014-03-1173418ND
2014-03-11734200.700 ppb
2014-03-1173421ND
2014-03-11734170.700 ppb
2014-06-1073662ND
2014-06-1073661ND
2014-06-1073663ND
2014-06-1773686ND
2014-08-1874010ND
2014-08-1874008ND
2014-08-1874009ND
2014-09-1074166ND
2014-09-1074167ND
2015-03-1674813ND
2015-03-1674812ND
2015-07-2075191ND
2015-07-2075192ND
2015-07-2275202ND
2016-03-08ND
2016-03-08ND
2016-07-13ND
2016-08-22ND
2017-03-07ND
2017-03-07ND
2018-03-07ND
2018-03-07ND
2018-09-25ND
2018-09-25ND
2018-09-25ND
2019-03-11ND
2019-03-11ND
2019-06-05ND
2019-06-05ND
2019-06-05ND
2019-06-06ND