cis-1,2-Dichloroethylene
Ritzville Water Department
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.
Testing results - average by year
Year | Average result | Samples taken | Detections | Range of results |
---|---|---|---|---|
2014 | 11.5 ppb | 2 | 1 | ND - 23.0 ppb |
2015 | ND | 4 | 0 | ND |
2016 | ND | 1 | 0 | ND |
2017 | ND | 1 | 0 | ND |
2018 | ND | 1 | 0 | ND |
2019 | ND | 1 | 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 |
---|---|---|
2014-07-08 | 02192 | 23.0 ppb |
2014-08-28 | 04140 | ND |
2015-03-19 | 10650 | ND |
2015-06-24 | 13541 | ND |
2015-07-01 | 13771 | ND |
2015-08-02 | 15895 | ND |
2016-06-08 | ND | |
2017-07-20 | ND | |
2018-08-09 | ND | |
2019-05-23 | ND |