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.
48
Samples
0
Samples exceeding legal limit (MCL)
0
Samples exceeding
health guidelines
Testing results - average by year
| Year | Average result | Samples taken | Detections | Range of results |
|---|---|---|---|---|
| 2014 | 0.200 ppb | 8 | 2 | ND - 1.000 ppb |
| 2015 | 1.80 ppb | 8 | 3 | ND - 7.40 ppb |
| 2016 | 5.34 ppb | 8 | 4 | ND - 29.0 ppb |
| 2017 | 1.25 ppb | 6 | 2 | ND - 5.60 ppb |
| 2018 | 1.30 ppb | 8 | 2 | ND - 7.50 ppb |
| 2019 | 2.66 ppb | 10 | 2 | ND - 25.0 ppb |
ppb = parts per billion
State and national drinking water standards and health guidelines
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 |
|---|---|---|
| 2014-02-26 | E131208339 | ND |
| 2014-06-10 | E140304185 | ND |
| 2014-06-26 | E140304171 | 1.000 ppb |
| 2014-06-26 | E140304170 | ND |
| 2014-08-21 | E140606715 | ND |
| 2014-09-25 | E140606720 | ND |
| 2014-11-18 | E140904332 | ND |
| 2014-11-18 | E140904326 | 0.600 ppb |
| 2015-03-26 | VA010-DCLS | 2.40 ppb |
| 2015-05-21 | VA010-DCLS | ND |
| 2015-06-10 | VA010-DCLS | 4.60 ppb |
| 2015-07-30 | VA010-DCLS | 7.40 ppb |
| 2015-07-30 | VA010-DCLS | ND |
| 2015-08-06 | VA010-DCLS | ND |
| 2015-11-17 | VA010-DCLS | ND |
| 2015-11-17 | VA010-DCLS | ND |
| 2016-03-29 | E151205960 | 29.0 ppb |
| 2016-03-29 | E151205962 | 1.000 ppb |
| 2016-03-29 | E151205963 | ND |
| 2016-06-15 | E160305751 | ND |
| 2016-06-20 | E160305746 | 4.90 ppb |
| 2016-09-13 | E160700325 | 7.80 ppb |
| 2016-11-29 | E160805461 | ND |
| 2016-11-29 | E160805475 | ND |
| 2017-02-28 | E170204040 | ND |
| 2017-05-23 | E170300436 | ND |
| 2017-05-23 | E170300444 | 1.90 ppb |
| 2017-08-10 | E170504025 | 5.60 ppb |
| 2017-11-16 | E170901981 | ND |
| 2017-11-16 | E170901975 | ND |
| 2018-02-27 | E180100342 | ND |
| 2018-05-23 | E180303850 | ND |
| 2018-05-30 | E180303851 | 2.90 ppb |
| 2018-08-21 | E180601975 | ND |
| 2018-08-28 | E180601971 | ND |
| 2018-08-28 | E180601981 | 7.50 ppb |
| 2018-11-19 | E180901410 | ND |
| 2018-12-11 | E180901404 | ND |
| 2019-02-19 | E181104004 | 25.0 ppb |
| 2019-02-19 | E181104015 | ND |
| 2019-02-19 | E181104016 | ND |
| 2019-03-21 | E190302948 | ND |
| 2019-03-21 | E190302957 | ND |
| 2019-05-29 | E190304839 | ND |
| 2019-05-29 | E190304846 | ND |
| 2019-09-10 | E190900749 | 1.60 ppb |
| 2019-11-25 | E191000255 | ND |
| 2019-12-04 | E191000266 | ND |