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 |
|---|---|---|---|---|
| 2014 | 0.169 ppb | 7 | 4 | ND - 0.530 ppb |
| 2015 | 0.728 ppb | 4 | 4 | 0.620 ppb - 0.870 ppb |
| 2016 | 0.637 ppb | 16 | 14 | ND - 1.000 ppb |
| 2017 | 0.224 ppb | 7 | 4 | ND - 0.570 ppb |
| 2018 | 0.344 ppb | 5 | 4 | ND - 0.640 ppb |
| 2019 | 0.433 ppb | 6 | 3 | ND - 1.10 ppb |
ppb = parts per billion
State and national drinking water standards and health guidelines
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 |
|---|---|---|
| 2014-03-19 | 14C0829-02 | 0.160 ppb |
| 2014-03-19 | 14C0829-01 | 0.150 ppb |
| 2014-05-29 | 14E3054-02 | ND |
| 2014-05-29 | 14E3056-01 | ND |
| 2014-05-29 | 14E3054-01 | ND |
| 2014-08-26 | 14H2350-01 | 0.340 ppb |
| 2014-12-17 | 14L0719-01 | 0.530 ppb |
| 2015-03-30 | 15C1168-01 | 0.620 ppb |
| 2015-06-10 | 15F0705-01 | 0.700 ppb |
| 2015-09-24 | 15I1305-01 | 0.720 ppb |
| 2015-11-19 | 15K1031-01 | 0.870 ppb |
| 2016-01-14 | 16A0522-01 | 0.740 ppb |
| 2016-01-14 | 16A0523-02 | 0.520 ppb |
| 2016-01-14 | 16A0523-01 | 1.000 ppb |
| 2016-02-17 | 16B0917-01 | 0.810 ppb |
| 2016-02-17 | 16B0917-02 | ND |
| 2016-02-17 | 16B0917-03 | ND |
| 2016-02-17 | 16B0917-04 | 0.750 ppb |
| 2016-06-01 | 16F0030-01 | 0.720 ppb |
| 2016-06-01 | 16F0032-01 | 0.440 ppb |
| 2016-08-25 | 16H2593-01 | 0.420 ppb |
| 2016-08-25 | 16H2589-01 | 0.850 ppb |
| 2016-08-25 | 16H2590-01 | 0.860 ppb |
| 2016-11-08 | 16K0369-01 | 0.760 ppb |
| 2016-11-08 | 16K0370-01 | 0.800 ppb |
| 2016-12-05 | 16L0214-01 | 0.640 ppb |
| 2016-12-05 | 16L0214-02 | 0.880 ppb |
| 2017-01-05 | 17A0040-01 | 0.130 ppb |
| 2017-04-11 | 17D0599-01 | 0.440 ppb |
| 2017-08-01 | 17H0064-01 | 0.430 ppb |
| 2017-11-01 | 17K0061-01 | ND |
| 2017-11-01 | 17K0060-01 | 0.570 ppb |
| 2017-11-01 | 17K0059-04 | ND |
| 2017-11-01 | 17K0059-01 | ND |
| 2018-01-19 | 18A0639-01 | ND |
| 2018-04-10 | 18D0389-01 | 0.200 ppb |
| 2018-07-12 | 18G0516-01 | 0.640 ppb |
| 2018-07-12 | 18G0518-01 | 0.450 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 |