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EWG's Tap Water Database — 2021 UPDATE

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cis-1,2-Dichloroethylene

Wigwam Mutual Water Company

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.

 

18

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND10ND
2015ND10ND
2016ND40ND
2017ND40ND
2018ND40ND
2019ND40ND

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 Result
2014-01-29ND
2015-01-20ND
2016-01-12ND
2016-04-11ND
2016-07-19ND
2016-10-20ND
2017-01-17ND
2017-04-11ND
2017-07-18ND
2017-10-03ND
2018-02-07ND
2018-04-03ND
2018-07-10ND
2018-10-09ND
2019-01-02ND
2019-04-02ND
2019-07-02ND
2019-10-01ND