cis-1,2-Dichloroethylene
City of San Juan
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.
12
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 | 2 | 0 | ND |
| 2015 | ND | 2 | 0 | ND |
| 2016 | ND | 2 | 0 | ND |
| 2017 | ND | 2 | 0 | ND |
| 2018 | ND | 2 | 0 | ND |
| 2019 | ND | 2 | 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 | Lab ID | Result |
|---|---|---|
| 2014-07-23 | AC60680 | ND |
| 2014-07-23 | AC60704 | ND |
| 2015-07-14 | AC99405 | ND |
| 2015-07-14 | AC99429 | ND |
| 2016-07-14 | AD44293 | ND |
| 2016-07-14 | AD44283 | ND |
| 2017-07-14 | AD89530 | ND |
| 2017-07-14 | AD89528 | ND |
| 2018-08-16 | AE37373 | ND |
| 2018-08-16 | AE37385 | ND |
| 2019-09-04 | AE82071 | ND |
| 2019-09-04 | AE82075 | ND |