Know Your Environment. Protect Your Health.

cis-1,2-Dichloroethylene

Chester Water Authority

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.

 

15

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND30ND
2019ND10ND
2020ND30ND
2021ND20ND
2022ND30ND
2023ND30ND

ppb = parts per billion

State, National, and Health Guidelines for Drinking Water

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
2018-01-092287664001ND
2018-05-158012319-01ND
2018-07-128020049-01ND
2019-07-103044796001ND
2020-02-0321499830.00ND
2020-05-0122019656.00ND
2020-07-0122412574.00ND
2021-04-0924244245.00ND
2021-07-2824825590.00ND
2022-04-2926461081.00ND
2022-08-0927230360.00ND
2022-11-0827819906.00ND
2023-07-1229299107.00ND
2023-11-0830068040.00ND
2023-11-1530068565.00ND