cis-1,2-Dichloroethylene
Hampton Shaler 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.
11
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 | 1.06 ppb | 2 | 1 | ND - 2.11 ppb |
| 2019 | 1.18 ppb | 2 | 2 | 0.666 ppb - 1.70 ppb |
| 2020 | 1.05 ppb | 1 | 1 | 1.05 ppb |
| 2021 | 1.05 ppb | 2 | 2 | 1.000 ppb - 1.10 ppb |
| 2022 | 0.290 ppb | 2 | 1 | ND - 0.580 ppb |
| 2023 | 0.660 ppb | 2 | 2 | 0.610 ppb - 0.710 ppb |
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 |
|---|---|---|
| 2018-07-12 | 18G1226-01 | 2.11 ppb |
| 2018-07-26 | 18G2476-01 | ND |
| 2019-07-01 | 19G1202-01 | 1.70 ppb |
| 2019-07-19 | 19G2512-01 | 0.666 ppb |
| 2020-07-20 | 22699192.00 | 1.05 ppb |
| 2021-07-12 | 24922669.00 | 1.000 ppb |
| 2021-07-13 | 24922423.00 | 1.10 ppb |
| 2022-07-18 | 27131865.00 | ND |
| 2022-07-19 | 27132056.00 | 0.580 ppb |
| 2023-08-21 | 29791133.00 | 0.710 ppb |
| 2023-08-22 | 29790891.00 | 0.610 ppb |