cis-1,2-Dichloroethylene
Palmer Water District No.1
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.
42
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 | 3.10 ppb | 6 | 1 | ND - 18.6 ppb |
| 2019 | 3.50 ppb | 6 | 1 | ND - 21.0 ppb |
| 2020 | 2.13 ppb | 8 | 1 | ND - 17.0 ppb |
| 2021 | 1.75 ppb | 8 | 1 | ND - 14.0 ppb |
| 2022 | 1.10 ppb | 7 | 1 | ND - 7.70 ppb |
| 2023 | 1.16 ppb | 7 | 1 | ND - 8.10 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 | Result |
|---|---|
| 2018-08-06 | ND |
| 2018-08-14 | ND |
| 2018-08-14 | 18.6 ppb |
| 2018-08-14 | ND |
| 2018-08-14 | ND |
| 2018-08-14 | ND |
| 2019-08-12 | ND |
| 2019-08-13 | ND |
| 2019-08-13 | 21.0 ppb |
| 2019-08-13 | ND |
| 2019-08-13 | ND |
| 2019-11-19 | ND |
| 2020-01-15 | ND |
| 2020-04-08 | ND |
| 2020-09-09 | ND |
| 2020-09-09 | ND |
| 2020-09-09 | 17.0 ppb |
| 2020-09-09 | ND |
| 2020-09-09 | ND |
| 2020-12-03 | ND |
| 2021-01-07 | ND |
| 2021-04-06 | ND |
| 2021-07-27 | 14.0 ppb |
| 2021-07-27 | ND |
| 2021-07-27 | ND |
| 2021-07-27 | ND |
| 2021-07-27 | ND |
| 2021-11-09 | ND |
| 2022-01-05 | ND |
| 2022-04-05 | ND |
| 2022-07-12 | 7.70 ppb |
| 2022-07-12 | ND |
| 2022-07-12 | ND |
| 2022-07-12 | ND |
| 2022-07-12 | ND |
| 2023-03-07 | ND |
| 2023-07-18 | ND |
| 2023-07-18 | ND |
| 2023-07-18 | ND |
| 2023-07-18 | ND |
| 2023-07-18 | 8.10 ppb |
| 2023-10-17 | ND |