Know Your Environment. Protect Your Health.

cis-1,2-Dichloroethylene

Guilford 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.

 

20

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
2021ND50ND
2022ND10ND
2023ND70ND

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
2018-05-29(104)ND
2018-09-04(104)ND
2018-12-11(104)ND
2019-03-05(104)ND
2020-11-0223491220.00ND
2020-11-0223491199.00ND
2020-11-0223491178.00ND
2021-03-0924197191.00ND
2021-03-0924197212.00ND
2021-03-2924197234.00ND
2021-03-2924197255.00ND
2021-11-0425719748.00ND
2022-04-2526601189.00ND
2023-05-1729053139.00ND
2023-05-1729053160.00ND
2023-05-2429053210.00ND
2023-05-2429053189.00ND
2023-08-0129447926.00ND
2023-08-0129447946.00ND
2023-08-0129447906.00ND