Know Your Environment. Protect Your Health.

cis-1,2-Dichloroethylene

Patterson 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.

 

14

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND20ND
2019ND60ND
2020ND30ND
2021ND10ND
2022ND10ND
2023ND10ND

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
2018-01-2535370415002ND
2018-01-2535370415002ND
2019-01-1535442674001ND
2019-01-1535442674001ND
2019-07-2435484856001ND
2019-07-2435484856001ND
2019-10-2235507344001ND
2019-10-2235507344001ND
2020-01-0735522572001ND
2020-01-0735522572002ND
2020-04-1435544199001ND
2021-03-2535621782001ND
2022-01-0635688920001ND
2023-01-3035776512001ND