trans-1,2-Dichloroethylene
Onslow Water And Sewer Authority
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 | 15 | 0 | ND |
| 2015 | ND | 4 | 0 | ND |
| 2016 | ND | 8 | 0 | ND |
| 2017 | ND | 16 | 0 | ND |
| 2018 | ND | 1 | 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 |
|---|---|---|
| 2014-11-19 | 37729_14-35254 | ND |
| 2014-11-19 | 37729_14-35259 | ND |
| 2014-11-19 | 37729_14-35260 | ND |
| 2014-11-19 | 37729_14-35261 | ND |
| 2014-11-19 | 37729_14-35263 | ND |
| 2014-11-19 | 37729_14-35264 | ND |
| 2014-11-19 | 37729_14-35265 | ND |
| 2014-11-19 | 37729_14-35267 | ND |
| 2014-11-19 | 37729_14-35249 | ND |
| 2014-11-20 | 37729_14-35380 | ND |
| 2014-11-20 | 37729_14-35383 | ND |
| 2014-11-20 | 37729_14-35382 | ND |
| 2014-11-20 | 37729_14-35381 | ND |
| 2014-11-20 | 37729_14-35379 | ND |
| 2014-11-24 | 37729_14-35755 | ND |
| 2015-06-17 | ND | |
| 2015-07-21 | ND | |
| 2015-11-02 | ND | |
| 2015-11-18 | ND | |
| 2016-01-13 | 37729_16-01252 | ND |
| 2016-01-13 | 37729_16-01249 | ND |
| 2016-01-13 | 37729_16-01247 | ND |
| 2016-01-13 | 37729_16-01246 | ND |
| 2016-01-13 | 37729_16-01248 | ND |
| 2016-05-24 | 37729_16-16239 | ND |
| 2016-08-01 | 37729_16-25686 | ND |
| 2016-12-12 | 37729_16-43130 | ND |
| 2017-04-24 | 37729_17-13522 | ND |
| 2017-04-24 | 37729_17-13525 | ND |
| 2017-04-24 | 37729_17-13515 | ND |
| 2017-04-24 | 37729_17-13501 | ND |
| 2017-05-01 | 37729_17-14290 | ND |
| 2017-05-01 | 37729_17-14291 | ND |
| 2017-05-09 | 37729_17-15373 | ND |
| 2017-05-09 | 37729_17-15211 | ND |
| 2017-05-15 | 37729_17-16194 | ND |
| 2017-05-15 | 37729_17-16195 | ND |
| 2017-05-23 | 37729_17-17005 | ND |
| 2017-05-23 | 37729_17-17011 | ND |
| 2017-05-30 | 37729_17-17691 | ND |
| 2017-06-05 | 37729_17-18412 | ND |
| 2017-06-05 | 37729_17-18409 | ND |
| 2017-07-24 | 37729_17-25776 | ND |
| 2018-05-08 | 37729_18-18338 | ND |
| 2019-09-10 | 37729_19-39114 | ND |
| 2019-10-29 | 37729_19-46570 | ND |