Know Your Environment. Protect Your Health.

cis-1,2-Dichloroethylene

City Of South Shore Water Works

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.

 

12

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND40ND
2019ND40ND
2020ND10ND
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
2018-03-278033410-01ND
2018-05-098051920-01ND
2018-08-018110005-01ND
2018-11-288110423-01ND
2019-03-279030723-01ND
2019-05-299050275-01ND
2019-08-149080489-01ND
2019-11-069110610-01ND
2020-10-280100626-01ND
2021-11-101101076-01RE1ND
2022-11-022101004-01ND
2023-07-123073438-01ND