cis-1,2-Dichloroethylene
Castle Rock
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.
41
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 | ND | 7 | 0 | ND |
| 2015 | ND | 3 | 0 | ND |
| 2016 | ND | 7 | 0 | ND |
| 2017 | ND | 9 | 0 | ND |
| 2018 | ND | 8 | 0 | ND |
| 2019 | ND | 7 | 0 | ND |
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 | Result |
|---|---|
| 2014-02-04 | ND |
| 2014-04-29 | ND |
| 2014-07-21 | ND |
| 2014-07-22 | ND |
| 2014-11-19 | ND |
| 2014-12-04 | ND |
| 2014-12-04 | ND |
| 2015-03-24 | ND |
| 2015-03-24 | ND |
| 2015-08-05 | ND |
| 2016-02-23 | ND |
| 2016-02-24 | ND |
| 2016-05-23 | ND |
| 2016-05-23 | ND |
| 2016-05-23 | ND |
| 2016-06-27 | ND |
| 2016-11-14 | ND |
| 2017-02-21 | ND |
| 2017-02-21 | ND |
| 2017-03-22 | ND |
| 2017-04-18 | ND |
| 2017-04-18 | ND |
| 2017-05-16 | ND |
| 2017-06-21 | ND |
| 2017-07-27 | ND |
| 2017-10-18 | ND |
| 2018-03-20 | ND |
| 2018-05-21 | ND |
| 2018-05-29 | ND |
| 2018-08-30 | ND |
| 2018-09-13 | ND |
| 2018-11-16 | ND |
| 2018-12-12 | ND |
| 2018-12-12 | ND |
| 2019-02-07 | ND |
| 2019-02-07 | ND |
| 2019-04-17 | ND |
| 2019-09-16 | ND |
| 2019-09-16 | ND |
| 2019-11-05 | ND |
| 2019-11-25 | ND |