Know Your Environment. Protect Your Health.

cis-1,2-Dichloroethylene

East Alton

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.

 

24

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20183.20 ppb442.80 ppb - 3.70 ppb
20192.60 ppb441.30 ppb - 3.60 ppb
20204.03 ppb443.60 ppb - 4.60 ppb
20213.26 ppb440.520 ppb - 4.40 ppb
20222.44 ppb440.660 ppb - 4.20 ppb
20232.92 ppb440.670 ppb - 4.50 ppb

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
2018-01-168013018-013.70 ppb
2018-04-038041291-012.90 ppb
2018-08-288085787-013.40 ppb
2018-10-228105047-012.80 ppb
2019-01-229014063-012.90 ppb
2019-04-299050017-013.60 ppb
2019-07-249075426-012.60 ppb
2019-10-229105187-011.30 ppb
2020-01-070011946-014.60 ppb
2020-04-290050025-013.90 ppb
2020-08-240085846-013.60 ppb
2020-10-060101784-014.00 ppb
2021-01-25EA04364-014.40 ppb
2021-04-20ED04366-014.00 ppb
2021-07-20EG04577-010.520 ppb
2021-10-26EJ05305-014.10 ppb
2022-01-11FA02423-013.30 ppb
2022-04-19FD03918-010.660 ppb
2022-08-01FH00772-014.20 ppb
2022-10-25FJ04962-011.60 ppb
2023-01-23GA04262-013.40 ppb
2023-04-25GD04539-013.10 ppb
2023-07-31GH00321-010.670 ppb
2023-10-17GJ03547-014.50 ppb