Know Your Environment. Protect Your Health.

cis-1,2-Dichloroethylene

North Wales 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.

 

69

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND130ND
2019ND120ND
2020ND120ND
2021ND110ND
2022ND110ND
2023ND100ND

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
2018-03-1220180932ND
2018-03-1220180940ND
2018-03-1220180939ND
2018-03-1220180938ND
2018-03-1220180937ND
2018-03-1220180936ND
2018-03-1220180935ND
2018-03-1220180934ND
2018-03-1220180933ND
2018-03-1320180956ND
2018-06-0520182148ND
2018-09-0420183373ND
2018-12-1820184775ND
2019-03-0520190857ND
2019-03-1220190960ND
2019-03-1220190956ND
2019-03-1220190964ND
2019-03-1220190957ND
2019-03-1220190963ND
2019-03-1220190962ND
2019-03-1220190958ND
2019-03-1220190961ND
2019-03-1220190959ND
2019-09-0320193443ND
2019-12-0320194748ND
2020-03-0321849460.00ND
2020-03-0321849439.00ND
2020-03-0321849418.00ND
2020-03-0321849481.00ND
2020-03-0321849502.00ND
2020-03-0321849523.00ND
2020-03-0321849397.00ND
2020-03-0321849544.00ND
2020-06-0222418573.00ND
2020-06-0222418594.00ND
2020-09-0123001528.00ND
2020-12-0123539402.00ND
2021-03-0124062303.00ND
2021-03-0124062387.00ND
2021-03-0124062261.00ND
2021-03-0124062366.00ND
2021-03-0124062345.00ND
2021-03-0124062324.00ND
2021-03-0124062282.00ND
2021-03-0224062408.00ND
2021-06-0124640221.00ND
2021-09-0925222340.00ND
2021-12-1425766370.00ND
2022-03-0126289324.00ND
2022-03-0926289240.00ND
2022-03-0926289303.00ND
2022-03-0926289282.00ND
2022-03-0926289177.00ND
2022-03-0926289219.00ND
2022-03-0926289198.00ND
2022-03-0926289261.00ND
2022-06-0726844653.00ND
2022-09-2027443445.00ND
2022-12-0628000351.00ND
2023-03-0728523003.00ND
2023-03-0828522940.00ND
2023-03-0828522898.00ND
2023-03-0828522982.00ND
2023-03-0828522961.00ND
2023-03-0828522919.00ND
2023-06-0529110395.00ND
2023-06-1929110348.00ND
2023-09-1229701899.00ND
2023-11-1730073301.00ND