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EWG's Tap Water Database — 2019 UPDATE

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Dibromochloromethane

PUD #1 of Asotin County

Dibromochloromethane, one of the total trihalomethanes (TTHMs), is formed when chlorine or other disinfectants are used to treat drinking water. Dibromochloromethane and other disinfection byproducts increase the risk of cancer and may cause problems during pregnancy. Click here to read more about disinfection byproducts.

 

35

Samples

0

Samples exceeding legal limit (MCL)

24

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20120.252 ppb92ND - 1.31 ppb
20131.23 ppb221.22 ppb - 1.23 ppb
20140.976 ppb129ND - 1.85 ppb
20151.67 ppb87ND - 2.97 ppb
20162.15 ppb222.08 ppb - 2.21 ppb
20171.94 ppb221.49 ppb - 2.39 ppb

ppb = parts per billion

State and national drinking water standards and health guidelines

EWG Health Guideline 0.1 ppb

The EWG Health Guideline of 0.1 ppb for dibromochloromethane 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
2012-08-21749311.31 ppb
2012-08-2174927ND
2012-08-2174925ND
2012-08-2174923ND
2012-08-2174921ND
2012-08-2174917ND
2012-08-2174919ND
2012-08-21749290.960 ppb
2012-08-2274945ND
2013-08-28881641.23 ppb
2013-08-28881621.22 ppb
2014-06-05983851.62 ppb
2014-06-05983911.43 ppb
2014-06-0598389ND
2014-06-05983871.10 ppb
2014-07-24008471.36 ppb
2014-07-24008491.24 ppb
2014-07-2400853ND
2014-07-2400851ND
2014-10-07535520.770 ppb
2014-10-07535561.85 ppb
2014-10-07535540.940 ppb
2014-10-07535501.40 ppb
2015-03-30586332.97 ppb
2015-03-30586352.82 ppb
2015-03-30586371.68 ppb
2015-03-30586392.23 ppb
2015-05-21604031.74 ppb
2015-05-21604050.690 ppb
2015-05-21604071.20 ppb
2015-05-2160409ND
2016-03-172.21 ppb
2016-03-172.08 ppb
2017-04-192.39 ppb
2017-04-191.49 ppb