trans-1,2-Dichloroethylene
Grand Lake 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 | 2 | 0 | ND |
| 2015 | ND | 5 | 0 | ND |
| 2016 | ND | 4 | 0 | ND |
| 2017 | ND | 5 | 0 | ND |
| 2018 | ND | 3 | 0 | ND |
| 2019 | ND | 3 | 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 |
|---|---|---|
| 2014-09-27 | 4I29028-01 | ND |
| 2014-12-15 | 4L15046-01 | ND |
| 2015-02-02 | 5B02023-01 | ND |
| 2015-02-11 | 5B11025-02 | ND |
| 2015-04-06 | 5D06056-01 | ND |
| 2015-09-08 | 5I08062-01 | ND |
| 2015-12-30 | 6A04045-01 | ND |
| 2016-02-01 | 6B01059-01 | ND |
| 2016-05-25 | 6E25035-01 | ND |
| 2016-09-26 | 6I26031-01 | ND |
| 2016-11-15 | 6K15044-01RE1 | ND |
| 2017-02-06 | 7B06052-01 | ND |
| 2017-05-01 | 7E01017-01 | ND |
| 2017-06-30 | 7G03055-01 | ND |
| 2017-09-29 | 7J02091-01 | ND |
| 2017-11-06 | 7K06053-01 | ND |
| 2018-02-05 | AB05048-01 | ND |
| 2018-05-07 | AE07057-01 | ND |
| 2018-11-26 | AK26021-01 | ND |
| 2019-03-29 | BD01061-01 | ND |
| 2019-05-06 | BE06043-01 | ND |
| 2019-09-16 | BI16051-01 | ND |