cis-1,2-Dichloroethylene
Topaz Lake Water Company Inc.
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 | ND | 1 | 0 | ND |
2015 | N/A | 0 | 0 | N/A |
2016 | ND | 1 | 0 | ND |
2017 | 0.173 ppb | 3 | 1 | ND - 0.520 ppb |
2018 | ND | 4 | 0 | ND |
2019 | ND | 4 | 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 |
---|---|---|
2014-04-17 | A4D1784-01 | ND |
2016-04-13 | A6D1566-01 | ND |
2017-04-25 | A7D2594-01 | ND |
2017-07-25 | A7G2768-01 | ND |
2017-11-13 | A7K1593-01 | 0.520 ppb |
2018-03-19 | A8C3101-01 | ND |
2018-05-15 | 18050824-01A | ND |
2018-07-20 | A8G3158-01 | ND |
2018-11-13 | A8K1915-01 | ND |
2019-01-28 | A9A3651-01 | ND |
2019-05-17 | A9E2697-01 | ND |
2019-07-18 | A9G3232-01 | ND |
2019-10-31 | A9K0025-01 | ND |