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EWG's Tap Water Database — 2019 UPDATE

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cis-1,2-Dichloroethylene

Freeport

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
20120.420 ppb21ND - 0.840 ppb
20130.620 ppb110.620 ppb
20140.230 ppb41ND - 0.920 ppb
20150.380 ppb31ND - 1.14 ppb
20160.560 ppb21ND - 1.12 ppb
20170.455 ppb21ND - 0.910 ppb

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
2012-01-231201B55-001A0.840 ppb
2012-01-231201B55-003AND
2013-01-093011426-010.620 ppb
2014-01-141401560-001A0.920 ppb
2014-04-151404933-001AND
2014-07-151407A31-001AND
2014-10-141410825-001AND
2015-01-201501B68-004AND
2015-01-201501B68-002AND
2015-01-201501B68-001A1.14 ppb
2016-01-121601642-001A1.12 ppb
2016-01-121601642-002AND
2017-01-101701670-001AND
2017-01-181701B80-001A0.910 ppb