trans-1,2-Dichloroethylene
Meriden Water Division
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 | ND | 15 | 0 | ND |
| 2019 | ND | 14 | 0 | ND |
| 2020 | ND | 11 | 0 | ND |
| 2021 | ND | 12 | 0 | ND |
| 2022 | ND | 10 | 0 | ND |
| 2023 | ND | 8 | 0 | ND |
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 |
|---|---|---|
| 2018-01-18 | BZ74951VOC1 | ND |
| 2018-05-17 | CA49083VOC1 | ND |
| 2018-07-19 | CA94411 | ND |
| 2018-07-19 | CA94412 | ND |
| 2018-07-19 | CA94413 | ND |
| 2018-07-19 | CA94410 | ND |
| 2018-07-26 | CA98719 | ND |
| 2018-08-09 | CB08263 | ND |
| 2018-08-23 | CB17441 | ND |
| 2018-09-20 | CB35508 | ND |
| 2018-09-20 | CB35511 | ND |
| 2018-09-27 | CB59877 | ND |
| 2018-10-11 | CB69872 | ND |
| 2018-11-14 | CB97371 | ND |
| 2018-12-07 | CC11054 | ND |
| 2019-02-06 | CC41805 | ND |
| 2019-04-25 | CD01551 | ND |
| 2019-05-08 | CD09272 | ND |
| 2019-06-19 | CD38010 | ND |
| 2019-06-19 | CD38012 | ND |
| 2019-06-19 | CD38011 | ND |
| 2019-06-26 | CD42474 | ND |
| 2019-06-26 | CD42475 | ND |
| 2019-06-26 | CD42476 | ND |
| 2019-07-10 | CD53533 | ND |
| 2019-08-07 | CD80098 | ND |
| 2019-09-04 | CD97370 | ND |
| 2019-10-02 | CE25548 | ND |
| 2019-11-06 | CE55216 | ND |
| 2020-06-10 | CG10479 | ND |
| 2020-06-17 | CG16086 | ND |
| 2020-06-17 | CG16087 | ND |
| 2020-06-17 | CG16088 | ND |
| 2020-07-08 | CG29532 | ND |
| 2020-07-29 | CG43212 | ND |
| 2020-07-29 | CG43211 | ND |
| 2020-08-12 | CG52353 | ND |
| 2020-09-30 | CG88204 | ND |
| 2020-10-07 | CG92447 | ND |
| 2020-11-12 | CH13760 | ND |
| 2021-04-26 | CI15487 | ND |
| 2021-05-05 | CI23774 | ND |
| 2021-06-09 | CI51091 | ND |
| 2021-06-09 | CI51092 | ND |
| 2021-06-09 | CI51093 | ND |
| 2021-06-09 | CI51094 | ND |
| 2021-06-09 | CI51095 | ND |
| 2021-06-09 | CI51096 | ND |
| 2021-06-14 | CI54537 | ND |
| 2021-07-28 | CI83796 | ND |
| 2021-08-09 | CI93330 | ND |
| 2021-08-25 | CJ13500 | ND |
| 2022-05-25 | CL38209 | ND |
| 2022-06-01 | CL45770 | ND |
| 2022-06-01 | CL45771 | ND |
| 2022-06-01 | CL45772 | ND |
| 2022-06-01 | CL45773 | ND |
| 2022-06-01 | CL45769 | ND |
| 2022-06-22 | CL61866 | ND |
| 2022-06-27 | CL64555 | ND |
| 2022-07-27 | CL90095 | ND |
| 2022-11-09 | CM80564 | ND |
| 2023-01-30 | CN32219 | ND |
| 2023-03-08 | CN55431 | ND |
| 2023-03-13 | CN58724 | ND |
| 2023-03-15 | CN60227 | ND |
| 2023-03-15 | CN60228 | ND |
| 2023-03-22 | CN65582 | ND |
| 2023-07-17 | CO51914 | ND |
| 2023-07-28 | CO61474 | ND |