trans-1,2-Dichloroethylene
Ward II 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 |
---|---|---|---|---|
2013 | N/A | 0 | 0 | N/A |
2014 | N/A | 0 | 0 | N/A |
2015 | ND | 20 | 0 | ND |
2016 | ND | 4 | 0 | ND |
2017 | ND | 6 | 0 | ND |
2018 | ND | 14 | 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 |
---|---|---|
2015-07-20 | 35198654001 | ND |
2015-07-20 | 35198654001 | ND |
2015-09-21 | 35208876003 | ND |
2015-09-21 | 35208876002 | ND |
2015-09-21 | 35208876001 | ND |
2015-09-21 | 35208876004 | ND |
2015-09-21 | 35208876005 | ND |
2015-09-21 | 35208876005 | ND |
2015-09-21 | 35208876004 | ND |
2015-09-21 | 35208876003 | ND |
2015-09-21 | 35208876002 | ND |
2015-09-21 | 35208876001 | ND |
2015-09-29 | 35209950001 | ND |
2015-09-29 | 35209950001 | ND |
2015-09-29 | 35209950002 | ND |
2015-09-29 | 35209950003 | ND |
2015-09-29 | 35209950004 | ND |
2015-09-29 | 35209950004 | ND |
2015-09-29 | 35209950003 | ND |
2015-09-29 | 35209950002 | ND |
2016-03-01 | 35232777001 | ND |
2016-03-01 | 35232777002 | ND |
2016-03-01 | 35232777002 | ND |
2016-03-01 | 35232777001 | ND |
2017-06-19 | 35320024003 | ND |
2017-06-19 | 35320024002 | ND |
2017-06-19 | 35320024001 | ND |
2017-06-19 | 35320024003 | ND |
2017-06-19 | 35320024002 | ND |
2017-06-19 | 35320024001 | ND |
2018-06-25 | 35400823001 | ND |
2018-06-25 | 35400823002 | ND |
2018-06-25 | 35400823005 | ND |
2018-06-25 | 35400823004 | ND |
2018-06-25 | 35400823003 | ND |
2018-06-25 | 35400823001 | ND |
2018-06-25 | 35400823002 | ND |
2018-06-25 | 35400823003 | ND |
2018-06-25 | 35400823004 | ND |
2018-06-25 | 35400823005 | ND |
2018-08-07 | 35409917001 | ND |
2018-08-07 | 35409917001 | ND |
2018-09-10 | 35417396001 | ND |
2018-09-10 | 35417396001 | ND |
2019-07-24 | 35485209001 | ND |
2019-07-24 | 35485209001 | ND |