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EWG's Tap Water Database — 2021 UPDATE

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1,1-Dichloroethylene

Jefferson County Public Water Supply District 6

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

MORE ABOUT THIS CONTAMINANT

 

35

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20141.16 ppb84ND - 3.83 ppb
20150.743 ppb41ND - 2.97 ppb
20161.38 ppb42ND - 3.12 ppb
20170.574 ppb72ND - 2.07 ppb
20181.02 ppb86ND - 1.98 ppb
20191.04 ppb42ND - 2.45 ppb

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
2014-02-05AC177131.13 ppb
2014-04-29AC225291.39 ppb
2014-07-30AC300812.94 ppb
2014-08-27AC33816ND
2014-08-27AC33817ND
2014-08-27AC33818ND
2014-08-27AC33819ND
2014-12-23AC373283.83 ppb
2015-02-02AC413722.97 ppb
2015-05-11AC50694ND
2015-08-03AC55478ND
2015-11-03AC62089ND
2016-02-01AC65846ND
2016-04-28AC701793.12 ppb
2016-08-03AC808502.39 ppb
2016-10-20AC86080ND
2017-01-23AC899101.95 ppb
2017-04-25AC951472.07 ppb
2017-07-25AD02418ND
2017-08-29AD04368ND
2017-08-29AD04369ND
2017-08-29AD04370ND
2017-10-27AD08625ND
2018-01-23AD120961.98 ppb
2018-05-08AD18748ND
2018-05-08AD187491.61 ppb
2018-06-25AD280431.03 ppb
2018-06-25AD280421.54 ppb
2018-07-13AD296491.05 ppb
2018-07-13AD296500.960 ppb
2018-10-18AD35206ND
2019-01-15AD385142.45 ppb
2019-04-17AD468541.71 ppb
2019-07-18AD52848ND
2019-10-23AD57537ND