EWG's Tap Water Database — 2021 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
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
20181.90 ppb111.90 ppb
20191.70 ppb111.70 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
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
2018-02-12AJ836281.90 ppb
2019-03-07AK128891.70 ppb