trans-1,2-Dichloroethylene
Blaine
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 |
|---|---|---|---|---|
| 2013 | N/A | 0 | 0 | N/A |
| 2014 | ND | 2 | 0 | ND |
| 2015 | ND | 5 | 0 | ND |
| 2016 | ND | 11 | 0 | ND |
| 2017 | ND | 10 | 0 | ND |
| 2018 | ND | 6 | 0 | ND |
| 2019 | ND | 2 | 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 |
|---|---|---|
| 2014-02-13 | 14B0848-01 | ND |
| 2014-05-27 | 14E2843-01 | ND |
| 2015-05-27 | 15E1985-01 | ND |
| 2015-05-27 | 15E1985-03 | ND |
| 2015-05-27 | 15E1985-04 | ND |
| 2015-05-27 | 15E1989-01 | ND |
| 2015-09-24 | 15I1244-01 | ND |
| 2016-03-03 | 16C0265-01 | ND |
| 2016-03-03 | 16C0266-01 | ND |
| 2016-03-03 | 16C0267-01 | ND |
| 2016-06-20 | 3474598 | ND |
| 2016-07-11 | 3490713 | ND |
| 2016-08-24 | 16H2457-01 | ND |
| 2016-08-30 | 16H2936-01 | ND |
| 2016-08-30 | 16H2936-05 | ND |
| 2016-08-30 | 16H2936-04 | ND |
| 2016-08-30 | 16H2936-03 | ND |
| 2016-08-30 | 16H2936-02 | ND |
| 2017-06-13 | 17F0778-01 | ND |
| 2017-07-27 | 17G1931-02 | ND |
| 2017-07-27 | 17G1934-01 | ND |
| 2017-07-27 | 17G1932-04 | ND |
| 2017-07-27 | 17G1932-03 | ND |
| 2017-07-27 | 17G1932-02 | ND |
| 2017-07-27 | 17G1932-01 | ND |
| 2017-07-27 | 17G1931-04 | ND |
| 2017-07-27 | 17G1931-03 | ND |
| 2017-07-27 | 17G1931-01 | ND |
| 2018-02-28 | 18B1345-01 | ND |
| 2018-02-28 | 18B1345-02 | ND |
| 2018-06-22 | 18F1667-01 | ND |
| 2018-07-16 | 18G0768-01 | ND |
| 2018-07-16 | 18G0770-01 | ND |
| 2018-10-29 | 18J1451-01 | ND |
| 2019-08-01 | 19H0056-01 | ND |
| 2019-10-30 | 19J1701-01 | ND |