trans-1,2-Dichloroethylene
Golden State Water Company - Arden Water Services
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 | 5 | 0 | ND |
| 2015 | N/A | 0 | 0 | N/A |
| 2016 | N/A | 0 | 0 | N/A |
| 2017 | ND | 9 | 0 | ND |
| 2018 | ND | 1 | 0 | ND |
| 2019 | N/A | 0 | 0 | N/A |
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 |
|---|---|---|
| 2014-01-14 | 2706-001-1150 | ND |
| 2014-01-14 | 2706-002-1111 | ND |
| 2014-01-14 | 2706-006-1223 | ND |
| 2014-01-14 | 2706-008-1303 | ND |
| 2014-10-14 | 2706-005-0946 | ND |
| 2017-02-16 | 9590-001-1220 | ND |
| 2017-02-28 | 9590-001-1147 | ND |
| 2017-02-28 | 9590-002-1234 | ND |
| 2017-02-28 | 9590-006-1018 | ND |
| 2017-02-28 | 9590-008-1100 | ND |
| 2017-03-14 | 9590-008-1056 | ND |
| 2017-07-11 | 9590-005-1311 | ND |
| 2017-09-12 | 9590-008-1037 | ND |
| 2017-12-05 | 9590-008-1055 | ND |
| 2018-02-28 | 9590-001-0840 | ND |