Know Your Environment. Protect Your Health.

cis-1,2-Dichloroethylene

Monona Waterworks

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.

 

17

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND20ND
2019ND20ND
2020ND10ND
2021ND50ND
2022ND30ND
2023ND40ND

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
2018-07-11393604001ND
2018-09-25410134001ND
2019-04-24442084001ND
2019-09-05467810001ND
2020-07-20515426001ND
2021-02-11547362001ND
2021-02-11547362002ND
2021-02-11547362001ND
2021-02-11547362002ND
2021-09-17584334001ND
2022-03-22610616001ND
2022-03-23610869001ND
2022-09-13642092001ND
2023-03-17668942001ND
2023-03-21669257001ND
2023-03-21669257002ND
2023-07-11687958001ND