trans-1,2-Dichloroethylene
South Mesa Water Company
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 | N/A | 0 | 0 | N/A |
2015 | N/A | 0 | 0 | N/A |
2016 | ND | 8 | 0 | ND |
2017 | N/A | 0 | 0 | N/A |
2018 | N/A | 0 | 0 | N/A |
2019 | ND | 8 | 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 |
---|---|---|
2016-08-02 | 3761-003-0750 | ND |
2016-08-02 | 3761-004-0810 | ND |
2016-08-02 | 3761-006-0830 | ND |
2016-08-02 | 3761-008-0905 | ND |
2016-08-02 | 3761-009-0920 | ND |
2016-08-02 | 3761-010-0945 | ND |
2016-08-02 | 3761-013-0845 | ND |
2016-08-02 | 3761-022-1005 | ND |
2019-08-12 | 3761-003-0930 | ND |
2019-08-12 | 3761-004-0945 | ND |
2019-08-12 | 3761-006-1000 | ND |
2019-08-12 | 3761-008-1020 | ND |
2019-08-12 | 3761-009-1030 | ND |
2019-08-12 | 3761-013-1015 | ND |
2019-08-12 | 3761-022-1110 | ND |
2019-09-30 | 3761-010-1050 | ND |