trans-1,2-Dichloroethylene
Fairfield Sapphire
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 | 10 | 0 | ND |
| 2015 | ND | 2 | 0 | ND |
| 2016 | N/A | 0 | 0 | N/A |
| 2017 | ND | 9 | 0 | ND |
| 2018 | ND | 6 | 0 | ND |
| 2019 | ND | 1 | 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 |
|---|---|---|
| 2014-02-04 | 7048-020414-009V | ND |
| 2014-02-04 | 7048-020414-008V | ND |
| 2014-04-21 | 7048-042114-010V | ND |
| 2014-10-15 | 7048-101514-007V | ND |
| 2014-10-15 | 7048-101514-006V | ND |
| 2014-10-15 | 7048-101514-005V | ND |
| 2014-10-15 | 7048-101514-004V | ND |
| 2014-10-15 | 7048-101514-003V | ND |
| 2014-10-15 | 7048-101514-002V | ND |
| 2014-10-15 | 7048-101514-001V | ND |
| 2015-01-27 | ND | |
| 2015-04-22 | ND | |
| 2017-01-10 | 7048-011017-008V | ND |
| 2017-01-10 | 7048-011017-009V | ND |
| 2017-10-18 | 7048-101817-001V | ND |
| 2017-10-18 | 7048-101817-007V | ND |
| 2017-10-18 | 7048-101817-006V | ND |
| 2017-10-18 | 7048-101817-005V | ND |
| 2017-10-18 | 7048-101817-004V | ND |
| 2017-10-18 | 7048-101817-003V | ND |
| 2017-10-18 | 7048-101817-002V | ND |
| 2018-01-24 | 7048-012418-002V | ND |
| 2018-01-24 | 7048-012418-012V | ND |
| 2018-05-08 | 7048-050818-002V | ND |
| 2018-05-08 | 7048-050818-010V | ND |
| 2018-07-11 | 7048-071118-002V | ND |
| 2018-10-09 | 7048-100918-002V | ND |
| 2019-10-07 | 7048-100719-002V | ND |