cis-1,2-Dichloroethylene
Guilford Water Authority
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.
20
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 |
|---|---|---|---|---|
| 2018 | ND | 3 | 0 | ND |
| 2019 | ND | 1 | 0 | ND |
| 2020 | ND | 3 | 0 | ND |
| 2021 | ND | 5 | 0 | ND |
| 2022 | ND | 1 | 0 | ND |
| 2023 | ND | 7 | 0 | ND |
ppb = parts per billion
State, National, and Health Guidelines for Drinking Water
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 |
|---|---|---|
| 2018-05-29 | (104) | ND |
| 2018-09-04 | (104) | ND |
| 2018-12-11 | (104) | ND |
| 2019-03-05 | (104) | ND |
| 2020-11-02 | 23491220.00 | ND |
| 2020-11-02 | 23491199.00 | ND |
| 2020-11-02 | 23491178.00 | ND |
| 2021-03-09 | 24197191.00 | ND |
| 2021-03-09 | 24197212.00 | ND |
| 2021-03-29 | 24197234.00 | ND |
| 2021-03-29 | 24197255.00 | ND |
| 2021-11-04 | 25719748.00 | ND |
| 2022-04-25 | 26601189.00 | ND |
| 2023-05-17 | 29053139.00 | ND |
| 2023-05-17 | 29053160.00 | ND |
| 2023-05-24 | 29053210.00 | ND |
| 2023-05-24 | 29053189.00 | ND |
| 2023-08-01 | 29447926.00 | ND |
| 2023-08-01 | 29447946.00 | ND |
| 2023-08-01 | 29447906.00 | ND |