EWG's Tap Water Database — 2019 UPDATE



Parker Little River Water System

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.





Samples exceeding legal limit (MCL)


Samples exceeding
health guidelines

Testing results - average by year

YearAverage resultSamples takenDetectionsRange of results
20121.50 ppb331.40 ppb - 1.70 ppb
20131.58 ppb441.20 ppb - 2.10 ppb
20141.25 ppb441.000 ppb - 1.50 ppb
20151.25 ppb441.000 ppb - 1.50 ppb
20161.40 ppb111.40 ppb
20171.60 ppb111.60 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
2012-04-04AH560291.70 ppb
2012-07-17AH701041.40 ppb
2012-10-16AH818801.40 ppb
2013-03-12AH905792.10 ppb
2013-05-02AI003411.60 ppb
2013-08-06AI092761.40 ppb
2013-10-07AI199991.20 ppb
2014-01-09AI262201.50 ppb
2014-04-08AI373231.40 ppb
2014-07-09AI451601.000 ppb
2014-10-07AI568451.10 ppb
2015-01-23AI633331.50 ppb
2015-04-10AI745971.20 ppb
2015-07-10AI824891.000 ppb
2015-10-12AI926601.30 ppb
2016-02-10AJ062251.40 ppb
2017-05-11AJ552381.60 ppb