trans-1,2-Dichloroethylene
Enterprise Water Works
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 | 5 | 0 | ND |
| 2015 | ND | 5 | 0 | ND |
| 2016 | ND | 17 | 0 | ND |
| 2017 | ND | 10 | 0 | ND |
| 2018 | ND | 5 | 0 | ND |
| 2019 | ND | 14 | 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 |
|---|---|---|
| 2014-03-12 | 1403-00284-7 | ND |
| 2014-03-12 | 1403-00284-8 | ND |
| 2014-03-12 | 1403-00284-9 | ND |
| 2014-11-18 | 1411-00235-5V | ND |
| 2014-11-18 | 1411-00235-1V | ND |
| 2015-02-17 | 1502-00240-7 | ND |
| 2015-02-17 | 1502-00240-5 | ND |
| 2015-02-17 | 1502-00240-3V | ND |
| 2015-11-04 | 1511-00076-010 | ND |
| 2015-11-04 | 1511-00076-11 | ND |
| 2016-03-16 | 1603-00261-3V | ND |
| 2016-03-16 | 1603-00261-2V | ND |
| 2016-03-16 | 1603-00261-1V | ND |
| 2016-09-13 | 1609-00214-5 | ND |
| 2016-09-13 | 1609-00214-3 | ND |
| 2016-09-13 | 1609-00214-1 | ND |
| 2016-09-13 | 1609-00214-11 | ND |
| 2016-09-13 | 1609-00214-14 | ND |
| 2016-09-13 | 1609-00214-8 | ND |
| 2016-09-13 | 1609-00214-16 | ND |
| 2016-09-13 | 1609-00214-15 | ND |
| 2016-09-13 | 1609-00214-2 | ND |
| 2016-09-13 | 1609-00214-17 | ND |
| 2016-09-13 | 1609-00214-4 | ND |
| 2016-10-18 | 1610-00215-1V | ND |
| 2016-12-06 | 1612-00141-21 | ND |
| 2016-12-06 | 1612-00141-28 | ND |
| 2017-02-28 | 1703-00015-007 | ND |
| 2017-02-28 | 1703-00015-4 | ND |
| 2017-02-28 | 1703-00015-3 | ND |
| 2017-03-21 | 1703-00293-1 | ND |
| 2017-03-21 | 1703-00293 | ND |
| 2017-03-21 | 1703-00293-4 | ND |
| 2017-06-26 | 1706-00408-2 | ND |
| 2017-09-19 | 1709-00306-10 | ND |
| 2017-10-31 | 1711-00018-4 | ND |
| 2017-10-31 | 1711-00018-5 | ND |
| 2018-03-14 | 1803-00266-16 | ND |
| 2018-03-14 | 1803-00266-15 | ND |
| 2018-03-14 | 1803-00266-13 | ND |
| 2018-03-14 | 1803-00266-14 | ND |
| 2018-11-27 | 1811-00495-003 | ND |
| 2019-12-18 | 1912-00394-005 | ND |
| 2019-12-18 | 1912-00394-004 | ND |
| 2019-12-18 | 1912-00394-015 | ND |
| 2019-12-18 | 1912-00394-002 | ND |
| 2019-12-18 | 1912-00394-001 | ND |
| 2019-12-18 | 1912-00394-012 | ND |
| 2019-12-18 | 1912-00394-009 | ND |
| 2019-12-18 | 1912-00394-013 | ND |
| 2019-12-18 | 1912-00394-003 | ND |
| 2019-12-18 | 1912-00394-006 | ND |
| 2019-12-18 | 1912-00394-010 | ND |
| 2019-12-18 | 1912-00394-011 | ND |
| 2019-12-18 | 1912-00394-007 | ND |
| 2019-12-18 | 1912-00394-014 | ND |