trans-1,2-Dichloroethylene
Gray 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.
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 | 4 | 0 | ND |
2015 | ND | 4 | 0 | ND |
2016 | ND | 4 | 0 | ND |
2017 | ND | 5 | 0 | ND |
2018 | ND | 5 | 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 |
---|---|---|
2014-03-31 | ND | |
2014-06-30 | ND | |
2014-09-30 | ND | |
2014-12-29 | ND | |
2015-03-31 | K001375001 | ND |
2015-06-29 | K012988001 | ND |
2015-09-30 | K026741001 | ND |
2015-12-31 | K042308001 | ND |
2016-03-31 | L001035001 | ND |
2016-06-30 | L012374001 | ND |
2016-09-22 | L027494001 | ND |
2016-12-30 | L042460001 | ND |
2017-03-16 | M001246001 | ND |
2017-04-18 | 1704126-01 | ND |
2017-05-02 | 1700081-01 | ND |
2017-09-14 | 1710838-01 | ND |
2017-11-14 | 1716829-01 | ND |
2018-01-18 | 1801019-01 | ND |
2018-04-05 | 1804067-01 | ND |
2018-04-10 | 1804-01052-001 | ND |
2018-09-19 | 1809-02456-001 | ND |
2018-10-19 | 1810-02580-001 | ND |
2019-01-11 | 1901-00958-002 | ND |
2019-04-16 | 1904-01907-001 | ND |
2019-04-23 | 1904-02647-001 | ND |
2019-07-10 | 1907-01178-001 | ND |
2019-10-16 | 1910-02077-001 | ND |