trans-1,2-Dichloroethylene
Big Bend Water District
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 | 4 | 0 | ND |
2015 | ND | 3 | 0 | ND |
2016 | ND | 5 | 0 | ND |
2017 | ND | 7 | 0 | ND |
2018 | ND | 4 | 0 | ND |
2019 | ND | 5 | 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 |
---|---|---|
2014-03-11 | 14030145-002 | ND |
2014-06-03 | 14060030-002 | ND |
2014-09-09 | 14090119-002 | ND |
2014-12-02 | 14120013-002 | ND |
2015-06-02 | 15060013-002 | ND |
2015-09-08 | 15090041-002 | ND |
2015-12-01 | 15110480-002 | ND |
2016-03-08 | 16030107-002 | ND |
2016-06-14 | S1600550002 | ND |
2016-09-20 | S1604624002 | ND |
2016-12-13 | S1605061003 | ND |
2016-12-13 | S1605061002 | ND |
2017-03-07 | S1606918002 | ND |
2017-03-07 | S1606918003 | ND |
2017-06-13 | S1701669002 | ND |
2017-09-06 | S1704441003 | ND |
2017-09-06 | S1704441002 | ND |
2017-12-12 | S1706393003 | ND |
2017-12-12 | S1706393002 | ND |
2018-03-05 | S1709051002 | ND |
2018-06-12 | S1802779002 | ND |
2018-09-04 | S1803960002 | ND |
2018-12-11 | S1805957002 | ND |
2019-01-08 | S1810135002 | ND |
2019-04-02 | S1903979002 | ND |
2019-06-11 | S1912932002 | ND |
2019-07-31 | S1921464002 | ND |
2019-10-15 | S1949830002 | ND |