trans-1,2-Dichloroethylene
Edina
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 |
|---|---|---|---|---|
| 2018 | 0.0650 ppb | 2 | 1 | ND - 0.130 ppb |
| 2019 | 0.0457 ppb | 7 | 2 | ND - 0.200 ppb |
| 2020 | 0.0440 ppb | 5 | 2 | ND - 0.120 ppb |
| 2021 | ND | 3 | 0 | ND |
| 2022 | 0.0340 ppb | 5 | 1 | ND - 0.170 ppb |
| 2023 | 0.0540 ppb | 5 | 2 | ND - 0.150 ppb |
ppb = parts per billion
State, National, and Health Guidelines for Drinking Water
EWG Health Guideline: 60 ppb
The EWG Health Guideline of 60 ppb for trans-1,2-dichloroethylene was defined by the California Office of Environmental Health Hazard Assessment as a public health goal, the level of a drinking water contaminant that does not pose a significant health risk. This health guideline protects against harm to internal organs.
EPA Maximum Contaminant
Level (MCL): 100 ppb
The legal limit for trans-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 |
|---|---|---|
| 2018-03-14 | 18C0569-01 | 0.130 ppb |
| 2018-08-01 | 18H0091-02 | ND |
| 2019-03-28 | 19C1245-01 | ND |
| 2019-05-29 | 19E2109-01 | ND |
| 2019-08-05 | 19H0330-02 | ND |
| 2019-08-20 | 19H1758-02 | ND |
| 2019-10-10 | 19J0709-01 | ND |
| 2019-10-10 | 19J0709-04 | 0.120 ppb |
| 2019-10-10 | 19J0712-01 | 0.200 ppb |
| 2020-02-10 | 20B0464-01 | ND |
| 2020-06-09 | 20F0692-02 | ND |
| 2020-08-06 | 20H0425-01 | 0.120 ppb |
| 2020-08-06 | 20H0428-02 | ND |
| 2020-12-08 | 20L0325-01 | 0.1000 ppb |
| 2021-06-04 | 21F0277-01 | ND |
| 2021-09-23 | 21I1339-01 | ND |
| 2021-12-14 | 21L0591-01 | ND |
| 2022-09-29 | 22I2264-01 | 0.170 ppb |
| 2022-10-11 | 22J0377-01 | ND |
| 2022-10-11 | 22J0377-02 | ND |
| 2022-10-11 | 22J0382-01 | ND |
| 2022-11-22 | 22K1042-01 | ND |
| 2023-03-21 | 23C1011-01 | ND |
| 2023-06-28 | 23F2171-01 | 0.150 ppb |
| 2023-09-28 | 23I1577-02 | ND |
| 2023-10-23 | 23J1132-01 | ND |
| 2023-10-23 | 23J1133-01 | 0.120 ppb |