trans-1,2-Dichloroethylene
Schofield Waterworks
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.
Testing results - average by year
Year | Average result | Samples taken | Detections | Range of results |
---|---|---|---|---|
2014 | ND | 6 | 0 | ND |
2015 | ND | 6 | 0 | ND |
2016 | ND | 6 | 0 | ND |
2017 | ND | 4 | 0 | ND |
2018 | ND | 3 | 0 | ND |
2019 | ND | 3 | 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 |
---|---|---|
2014-02-10 | 769670 | ND |
2014-02-10 | 769666 | ND |
2014-02-10 | 769668 | ND |
2014-04-24 | 782514 | ND |
2014-07-16 | 803522 | ND |
2014-11-13 | 831497 | ND |
2015-03-03 | 846158 | ND |
2015-03-03 | 846154 | ND |
2015-03-03 | 846156 | ND |
2015-04-20 | 855168 | ND |
2015-07-07 | 869336 | ND |
2015-12-07 | 897130 | ND |
2016-02-09 | 904665 | ND |
2016-02-09 | 904667 | ND |
2016-02-09 | 904669 | ND |
2016-04-05 | 913780 | ND |
2016-08-10 | 938490 | ND |
2016-10-12 | 953076 | ND |
2017-06-20 | 999042 | ND |
2017-08-16 | 1011908 | ND |
2017-08-16 | 1011903 | ND |
2017-11-07 | 1028389 | ND |
2018-08-28 | 1076576 | ND |
2018-08-28 | 1076575 | ND |
2018-08-28 | 1076574 | ND |
2019-09-16 | 1148084 | ND |
2019-09-16 | 1148086 | ND |
2019-09-16 | 1148082 | ND |