trans-1,2-Dichloroethylene
City of Ridgeland
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 | ND | 1 | 0 | ND |
| 2015 | ND | 6 | 0 | ND |
| 2016 | ND | 2 | 0 | ND |
| 2017 | ND | 1 | 0 | ND |
| 2018 | ND | 5 | 0 | ND |
| 2019 | ND | 5 | 0 | ND |
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 |
|---|---|---|
| 2014-06-23 | 140624-002VO | ND |
| 2015-07-28 | 150729-005VO | ND |
| 2015-08-31 | 150901-018VO | ND |
| 2015-08-31 | 150901-017VO | ND |
| 2015-08-31 | 150901-016VO | ND |
| 2015-08-31 | 150901-012VO | ND |
| 2015-08-31 | 150901-011VO | ND |
| 2016-07-18 | 160719-021VO | ND |
| 2016-09-26 | 160927-008VO | ND |
| 2017-08-28 | 170829-010VO | ND |
| 2018-02-05 | 180206-003VO | ND |
| 2018-05-01 | 180502-002VO | ND |
| 2018-07-16 | 180717-001VO | ND |
| 2018-08-13 | 180814-006VO | ND |
| 2018-10-23 | 181024-006VO | ND |
| 2019-03-11 | 190312-009VO | ND |
| 2019-05-06 | 190507-005VO | ND |
| 2019-07-15 | 190716-012VO | ND |
| 2019-09-09 | 190910-001VO | ND |
| 2019-11-04 | 191105-007VO | ND |