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EWG's Tap Water Database — 2021 UPDATE

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cis-1,2-Dichloroethylene

Clay County Reg Water District

1,2-Dichloroethylene, a neurotoxic solvent, exists in two different forms: trans-1,2-dichloroethylene and cis-1,2-dichloroethylene. A mixture of the two forms is used to manufacture other solvents and chemical products.

 

14

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND30ND
2015ND20ND
2016ND20ND
2017ND30ND
2018ND20ND
2019ND20ND

ppb = parts per billion

State and national drinking water standards and health guidelines

EPA Maximum Contaminant
Level (MCL) 70 ppb

The legal limit for cis-1,2-dichloroethylene, established in 1991, was based on a toxicity study in laboratory animals conducted in the 1980s.

ppb = parts per billion

All test results

Date Lab ID Result
2014-08-0614219000701ND
2014-08-0614219000801ND
2014-08-0614219000601ND
2015-09-0715252003701ND
2015-09-0715252003501ND
2016-07-2716210001201ND
2016-07-2716210001101ND
2017-07-1717200001401ND
2017-07-1717200001601ND
2017-07-1717200001501ND
2018-08-2818242002601ND
2018-08-2818242002501ND
2019-08-0619220014101ND
2019-08-0619220014401ND