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EWG's Tap Water Database — 2019 UPDATE

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1,1-Dichloroethylene

Northwest Utilities

1,1-Dichloroethylene is used for plastics production. It damages DNA and causes cancer in laboratory animal studies.

 

20

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012ND30ND
2013ND30ND
2014ND30ND
2015ND30ND
2016ND30ND
2017ND50ND

ppb = parts per billion

State and national drinking water standards and health guidelines

EPA Maximum Contaminant
Level (MCL) 7 ppb

The legal limit for 1,1-dichloroethylene, established in 1987, was based on a toxicity study conducted in laboratory animals in the 1980s.

ppb = parts per billion

All test results

Date Result
2012-08-21ND
2012-09-04ND
2012-09-04ND
2013-08-06ND
2013-08-06ND
2013-08-13ND
2014-07-21ND
2014-07-21ND
2014-07-21ND
2015-09-15ND
2015-09-15ND
2015-09-15ND
2016-09-12ND
2016-09-12ND
2016-09-12ND
2017-08-08ND
2017-08-08ND
2017-08-08ND
2017-08-08ND
2017-08-08ND