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EWG's Tap Water Database — 2021 UPDATE

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1,1-Dichloroethylene

Colby, City of

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

MORE ABOUT THIS CONTAMINANT

 

33

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND90ND
2015N/A00N/A
2016N/A00N/A
2017ND90ND
2018ND70ND
2019ND80ND

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 Lab ID Result
2014-05-20117907ND
2014-05-20117893ND
2014-05-20117894ND
2014-05-20117895ND
2014-05-20117896ND
2014-05-20117897ND
2014-05-20117904ND
2014-05-20117905ND
2014-05-20117906ND
2017-05-22765833ND
2017-05-22765840ND
2017-05-22765839ND
2017-05-22765838ND
2017-05-22765837ND
2017-05-22765836ND
2017-05-22765835ND
2017-05-22765834ND
2017-05-22765832ND
2018-03-13937288ND
2018-06-05979790ND
2018-06-05979789ND
2018-08-201028574ND
2018-08-201028573ND
2018-11-261081048ND
2018-11-261081047ND
2019-02-181122672ND
2019-02-181122664ND
2019-05-201157651ND
2019-05-201157648ND
2019-08-191225654ND
2019-08-191225653ND
2019-11-181276965ND
2019-11-181276966ND