trans-1,2-Dichloroethylene
Saint Louis 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.
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 | 0.344 ppb | 5 | 4 | ND - 0.640 ppb |
| 2019 | 0.433 ppb | 6 | 3 | ND - 1.10 ppb |
| 2020 | 0.0950 ppb | 10 | 2 | ND - 0.710 ppb |
| 2021 | 0.256 ppb | 8 | 3 | ND - 0.710 ppb |
| 2022 | 0.216 ppb | 8 | 5 | ND - 0.810 ppb |
| 2023 | 0.296 ppb | 10 | 6 | ND - 0.810 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 |
|---|---|---|
| 2018-01-19 | 18A0639-01 | ND |
| 2018-04-10 | 18D0389-01 | 0.200 ppb |
| 2018-07-12 | 18G0518-01 | 0.450 ppb |
| 2018-07-12 | 18G0516-01 | 0.640 ppb |
| 2018-10-17 | 18J0842-01 | 0.430 ppb |
| 2019-02-13 | 19B0557-01 | 0.680 ppb |
| 2019-05-16 | 19E1269-01 | ND |
| 2019-05-16 | 19E1270-01 | ND |
| 2019-05-21 | 19E1637-01 | 0.820 ppb |
| 2019-08-07 | 19H0616-01 | 1.10 ppb |
| 2019-10-29 | 19J1574-01 | ND |
| 2020-01-22 | 20A0832-02 | ND |
| 2020-01-22 | 20A0832-01 | ND |
| 2020-05-21 | 20E1400-01 | ND |
| 2020-05-21 | 20E1400-02 | ND |
| 2020-05-21 | 20E1401-02 | ND |
| 2020-06-08 | 20F0622-01 | 0.710 ppb |
| 2020-08-05 | 20H0263-03 | ND |
| 2020-08-21 | 20H1724-01 | ND |
| 2020-11-12 | 20K0537-01 | ND |
| 2020-11-12 | 20K0537-02 | 0.240 ppb |
| 2021-03-26 | 21C1102-01 | ND |
| 2021-04-29 | 21D1871-01 | ND |
| 2021-04-29 | 21D1870-01 | 0.660 ppb |
| 2021-08-10 | 21H0796-02 | 0.680 ppb |
| 2021-08-10 | 21H0797-01 | ND |
| 2021-11-30 | 21L0010-02 | ND |
| 2021-11-30 | 21L0016-01 | 0.710 ppb |
| 2021-12-21 | 21L0852-01 | ND |
| 2022-02-08 | 22B0528-02 | ND |
| 2022-02-08 | 22B0531-01 | 0.810 ppb |
| 2022-06-22 | 22F1363-01 | 0.120 ppb |
| 2022-07-18 | 22G1076-01 | 0.130 ppb |
| 2022-09-23 | 22I1991-01 | 0.320 ppb |
| 2022-09-23 | 22I1993-01 | ND |
| 2022-11-18 | 22K0869-01 | 0.350 ppb |
| 2022-11-18 | 22K0870-01 | ND |
| 2023-03-15 | 23C0731-01 | ND |
| 2023-03-15 | 23C0732-01 | 0.450 ppb |
| 2023-06-08 | 23F0898-01 | 0.150 ppb |
| 2023-06-08 | 23F0898-02 | ND |
| 2023-06-08 | 23F0898-03 | 0.680 ppb |
| 2023-07-19 | 23G1149-01 | 0.1000 ppb |
| 2023-07-19 | 23G1149-03 | 0.770 ppb |
| 2023-10-30 | 23J1664-01 | ND |
| 2023-10-30 | 23J1664-04 | ND |
| 2023-10-30 | 23J1665-01 | 0.810 ppb |