trans-1,2-Dichloroethylene
Ruth Water District
NOTE: Ruth Water District purchases water from Ely Municipal Water Department which is required to test for trans-1,2-dichloroethylene. Sample information shown below was taken by Ely Municipal Water Department.
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 | 5 | 0 | ND |
2015 | ND | 1 | 0 | ND |
2016 | ND | 4 | 0 | ND |
2017 | N/A | 0 | 0 | N/A |
2018 | ND | 1 | 0 | ND |
2019 | ND | 4 | 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
NOTE: Ruth Water District purchases water from Ely Municipal Water Department which is required to test for trans-1,2-dichloroethylene. Sample information shown below was taken by Ely Municipal Water Department.
Date | Lab ID | Result |
---|---|---|
2014-02-18 | 1402384-002 | ND |
2014-02-18 | 1402384-001 | ND |
2014-04-15 | 1404372-001 | ND |
2014-04-15 | 1404372-002 | ND |
2014-12-16 | 1412517-001 | ND |
2015-03-11 | 1503401-003 | ND |
2016-09-08 | 6I13035-04V | ND |
2016-09-08 | 6I13035-01 | ND |
2016-09-08 | 6I13035-02 | ND |
2016-09-08 | 6I13035-03 | ND |
2018-11-08 | 18110223-007 | ND |
2019-11-14 | 19110404-002 | ND |
2019-11-14 | 19110404-003 | ND |
2019-11-14 | 19110404-005 | ND |
2019-11-21 | 19110631-001 | ND |