trans-1,2-Dichloroethylene
Liberty Water Lpsco
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 | 3 | 0 | ND |
| 2016 | ND | 6 | 0 | ND |
| 2017 | ND | 3 | 0 | ND |
| 2018 | N/A | 0 | 0 | N/A |
| 2019 | ND | 6 | 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 |
|---|---|---|
| 2014-01-10 | 4010862-04 | ND |
| 2014-01-16 | 4011395-02V | ND |
| 2014-01-16 | 4011395-01V | ND |
| 2015-01-27 | 5012085-02 | ND |
| 2015-01-27 | 5012085-01V | ND |
| 2015-02-16 | 5021409-02 | ND |
| 2016-02-17 | 6021638-02V | ND |
| 2016-02-17 | 6021638-01V | ND |
| 2016-02-18 | 6021728-01V | ND |
| 2016-02-24 | 6022183-01V | ND |
| 2016-02-25 | 6022343-01V | ND |
| 2016-03-03 | 6030386-02V | ND |
| 2017-10-05 | 7100650-04 | ND |
| 2017-10-05 | 7100650-03 | ND |
| 2017-10-05 | 7100650-02 | ND |
| 2019-02-27 | 19B2833-01 | ND |
| 2019-02-28 | 19B2960-01 | ND |
| 2019-03-11 | 19C1070-01 | ND |
| 2019-03-13 | 19C1387-01 | ND |
| 2019-03-14 | 19C1532-01 | ND |
| 2019-03-19 | 19C2020-01 | ND |