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EWG's Tap Water Database — 2019 UPDATE

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cis-1,2-Dichloroethylene

Tempe Water Supply Corporation 1

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.

 

21

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012ND20ND
2013ND20ND
2014ND30ND
2015ND60ND
2016ND40ND
2017ND40ND

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
2012-02-29AB82330ND
2012-02-29AB82328ND
2013-02-26AC11569ND
2013-02-26AC11571ND
2014-01-15AC39002ND
2014-01-15AC38994ND
2014-01-15AC38992ND
2015-02-24AC81713ND
2015-02-24AC81699ND
2015-02-24AC81709ND
2015-02-24AC81697ND
2015-09-10AD06572ND
2015-12-03AD15456ND
2016-02-25AD25795ND
2016-02-25AD25791ND
2016-02-25AD25783ND
2016-02-25AD25785ND
2017-06-01AD86432ND
2017-06-01AD86412ND
2017-06-01AD86408ND
2017-06-01AD86426ND