Know Your Environment. Protect Your Health.

cis-1,2-Dichloroethylene

Purcellville, Town of

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.

 

54

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20181.30 ppb82ND - 7.50 ppb
20192.66 ppb102ND - 25.0 ppb
20201.13 ppb62ND - 5.10 ppb
2021ND90ND
20223.75 ppb103ND - 26.0 ppb
20230.382 ppb112ND - 3.00 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
2018-02-27E180100342ND
2018-05-23E180303850ND
2018-05-30E1803038512.90 ppb
2018-08-21E180601975ND
2018-08-28E180601971ND
2018-08-28E1806019817.50 ppb
2018-11-19E180901410ND
2018-12-11E180901404ND
2019-02-19E18110400425.0 ppb
2019-02-19E181104015ND
2019-02-19E181104016ND
2019-03-21E190302948ND
2019-03-21E190302957ND
2019-05-29E190304839ND
2019-05-29E190304846ND
2019-09-10E1909007491.60 ppb
2019-11-25E191000255ND
2019-12-04E191000266ND
2020-02-25E191203663ND
2020-05-20E200302298ND
2020-06-16E2006005081.70 ppb
2020-08-11E2006012755.10 ppb
2020-10-19E200906213ND
2020-11-16E200906214ND
2021-03-15E210100113ND
2021-05-17E210400628ND
2021-05-24E210400643ND
2021-08-23E210701941ND
2021-08-23E210701945ND
2021-08-23E210705571ND
2021-11-30E210901978ND
2021-11-30E210901979ND
2021-11-30E211100054ND
2022-02-23E211206105ND
2022-02-23E21120166526.0 ppb
2022-02-23E211201664ND
2022-02-23E211201666ND
2022-05-23E220303695ND
2022-05-23E2203036941.50 ppb
2022-06-29E220607528ND
2022-08-22E22060751610.00 ppb
2022-11-14E220904387ND
2022-11-14E220904386ND
2023-02-13E221203953ND
2023-05-01E230305398ND
2023-05-01E230305409ND
2023-05-01E230305414ND
2023-05-17E230305386ND
2023-05-17E230305403ND
2023-05-17E230305420ND
2023-05-17E230305423ND
2023-08-28E2306033811.20 ppb
2023-11-01E230904714ND
2023-12-07E2309036193.00 ppb