Know Your Environment. Protect Your Health.

cis-1,2-Dichloroethylene

Quarryville Borough

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
2018ND40ND
20190.400 ppb42ND - 0.900 ppb
20201.15 ppb440.900 ppb - 1.40 ppb
20211.30 ppb441.20 ppb - 1.40 ppb
20221.38 ppb441.20 ppb - 1.70 ppb
20231.73 ppb441.60 ppb - 1.90 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
2018-01-117121162-01ND
2018-04-098032882-01ND
2018-07-108062555-01ND
2018-10-118093465-01ND
2019-01-108123550-01ND
2019-04-119032840-01ND
2019-07-099063178-010.700 ppb
2019-10-109093307-010.900 ppb
2020-01-0921629897.000.900 ppb
2020-04-0922171733.001.000 ppb
2020-07-0922756540.001.30 ppb
2020-10-0823322627.001.40 ppb
2021-01-0723849727.001.40 ppb
2021-04-0824393725.001.40 ppb
2021-07-0824979074.001.20 ppb
2021-10-0725548433.001.20 ppb
2022-01-0626080265.001.20 ppb
2022-04-0726607608.001.30 ppb
2022-07-0727191785.001.70 ppb
2022-10-0627785630.001.30 ppb
2023-01-1228310292.001.60 ppb
2023-04-0628858406.001.80 ppb
2023-07-0629454455.001.90 ppb
2023-10-1230031358.001.60 ppb