cis-1,2-Dichloroethylene
Spring Park
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.
23
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 | 0.313 ppb | 4 | 2 | ND - 0.630 ppb |
| 2019 | 0.250 ppb | 6 | 4 | ND - 0.590 ppb |
| 2020 | 0.157 ppb | 3 | 2 | ND - 0.260 ppb |
| 2021 | 0.220 ppb | 2 | 1 | ND - 0.440 ppb |
| 2022 | 1.28 ppb | 3 | 3 | 0.450 ppb - 1.90 ppb |
| 2023 | 0.798 ppb | 5 | 5 | 0.360 ppb - 1.30 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 |
|---|---|---|
| 2018-02-27 | 18B1222-01 | ND |
| 2018-04-26 | 18D1558-01 | ND |
| 2018-11-13 | 18K0569-01 | 0.630 ppb |
| 2018-12-18 | 18L0646-01 | 0.620 ppb |
| 2019-01-29 | 19A0922-01 | 0.280 ppb |
| 2019-02-19 | 19B0810-01 | ND |
| 2019-03-22 | 19C0967-01 | 0.240 ppb |
| 2019-05-10 | 19E0822-01 | ND |
| 2019-10-01 | 19J0043-01 | 0.590 ppb |
| 2019-11-05 | 19K0180-01 | 0.390 ppb |
| 2020-01-07 | 20A0112-01 | ND |
| 2020-06-03 | 20F0243-01 | 0.210 ppb |
| 2020-08-04 | 20H0088-01 | 0.260 ppb |
| 2021-04-28 | 21D1668-01 | 0.440 ppb |
| 2021-11-04 | 21K0345-01 | ND |
| 2022-06-16 | 22F1024-01 | 1.90 ppb |
| 2022-07-18 | 22G1075-01 | 0.450 ppb |
| 2022-11-18 | 22K0868-01 | 1.50 ppb |
| 2023-02-28 | 23C0047-01 | 0.780 ppb |
| 2023-02-28 | 23C0047-03 | 1.10 ppb |
| 2023-05-01 | 23E0055-01 | 1.30 ppb |
| 2023-08-22 | 23H2301-01 | 0.450 ppb |
| 2023-10-20 | 23J1098-01 | 0.360 ppb |