trans-1,2-Dichloroethylene
Snyder Public Works Authority
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 | 3 | 0 | ND |
| 2015 | ND | 1 | 0 | ND |
| 2016 | ND | 3 | 0 | ND |
| 2017 | ND | 4 | 0 | ND |
| 2018 | ND | 8 | 0 | ND |
| 2019 | ND | 4 | 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 |
|---|---|---|
| 2014-04-07 | 1291139 | ND |
| 2014-09-08 | 1332743 | ND |
| 2014-11-03 | 1347483 | ND |
| 2015-01-26 | 1367531 | ND |
| 2016-03-07 | 1472633 | ND |
| 2016-07-25 | 1058708 | ND |
| 2016-10-31 | 109952103 | ND |
| 2017-01-22 | 11667603 | ND |
| 2017-04-17 | 114317403 | ND |
| 2017-08-21 | 117385603 | ND |
| 2017-11-22 | 7K22046-05 | ND |
| 2018-01-17 | 8A17087-01 | ND |
| 2018-04-11 | AD11159-01 | ND |
| 2018-06-06 | AF06134-01 | ND |
| 2018-07-18 | AG18124-02 | ND |
| 2018-07-18 | AG18124-01 | ND |
| 2018-09-12 | AI12127-01 | ND |
| 2018-10-17 | AJ17105-01 | ND |
| 2018-12-30 | BA02092-01 | ND |
| 2019-01-23 | BA23079-02 | ND |
| 2019-01-23 | BA23079-01 | ND |
| 2019-04-24 | BD24089-01 | ND |
| 2019-07-17 | BG17156-02 | ND |