cis-1,2-Dichloroethylene
Portland Water Bureau
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 |
|---|---|---|
| 2014-04-08 | BB38036-V | ND |
| 2014-07-08 | BB42035-V | ND |
| 2015-03-31 | BB49816-V | ND |
| 2015-06-17 | BB52444-V | ND |
| 2016-04-05 | BB61496-V | ND |
| 2016-08-01 | BB71730-V | ND |
| 2017-02-22 | BB84114-V | ND |
| 2017-04-04 | BB87017-V | ND |
| 2018-03-15 | BC03118-V | ND |
| 2018-04-03 | BC04117-V | ND |
| 2019-04-02 | BC21049-V | ND |
| 2019-07-15 | BC25289-V | ND |