cis-1,2-Dichloroethylene
Dewey Beach Water Department
NOTE: Dewey Beach Water Department purchases water from Rehoboth Beach Water Department which is required to test for cis-1,2-dichloroethylene. Sample information shown below was taken by Rehoboth Beach 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.
Samples
Samples exceeding legal limit (MCL)
Samples exceeding
health guidelines
Testing results - average by year
| Year | Average result | Samples taken | Detections | Range of results |
|---|---|---|---|---|
| 2014 | N/A | 0 | 0 | N/A |
| 2015 | ND | 1 | 0 | ND |
| 2016 | ND | 1 | 0 | ND |
| 2017 | ND | 1 | 0 | ND |
| 2018 | ND | 4 | 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
NOTE: Dewey Beach Water Department purchases water from Rehoboth Beach Water Department which is required to test for cis-1,2-dichloroethylene. Sample information shown below was taken by Rehoboth Beach Water Department.
| Date | Lab ID | Result |
|---|---|---|
| 2015-11-17 | S637349 | ND |
| 2016-08-30 | S694033 | ND |
| 2016-12-21 | S694897 | ND |
| 2017-08-22 | S738553 | ND |
| 2018-11-29 | S850881 | ND |
| 2018-11-29 | S850883 | ND |
| 2018-11-29 | S850885 | ND |
| 2018-12-14 | S853797 | ND |
| 2019-07-09 | S895563 | ND |
| 2019-09-23 | S909181 | ND |