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EWG's Tap Water Database — 2019 UPDATE

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Bromodichloromethane

PUD #1 of Asotin County

Bromodichloromethane, one of the total trihalomethanes (TTHMs), is formed when chlorine or other disinfectants are used to treat drinking water. Bromodichloromethane 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)

10

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20120.0556 ppb91ND - 0.500 ppb
2013ND20ND
20140.0442 ppb121ND - 0.530 ppb
20150.463 ppb85ND - 0.880 ppb
20160.605 ppb220.560 ppb - 0.650 ppb
20170.255 ppb21ND - 0.510 ppb

ppb = parts per billion

State and national drinking water standards and health guidelines

EWG Health Guideline 0.06 ppb

The EWG Health Guideline of 0.06 ppb for bromodichloromethane 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
2012-08-2174929ND
2012-08-2174925ND
2012-08-2174923ND
2012-08-2174917ND
2012-08-2174927ND
2012-08-2174921ND
2012-08-2174919ND
2012-08-21749310.500 ppb
2012-08-2274945ND
2013-08-2888164ND
2013-08-2888162ND
2014-06-05983850.530 ppb
2014-06-0598387ND
2014-06-0598389ND
2014-06-0598391ND
2014-07-2400849ND
2014-07-2400851ND
2014-07-2400853ND
2014-07-2400847ND
2014-10-0753550ND
2014-10-0753556ND
2014-10-0753552ND
2014-10-0753554ND
2015-03-30586330.880 ppb
2015-03-30586350.790 ppb
2015-03-30586370.580 ppb
2015-03-30586390.790 ppb
2015-05-21604030.660 ppb
2015-05-2160405ND
2015-05-2160407ND
2015-05-2160409ND
2016-03-170.650 ppb
2016-03-170.560 ppb
2017-04-19ND
2017-04-190.510 ppb