trans-1,2-Dichloroethylene
City of Austin Water & Wastewater
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 |
|---|---|---|---|---|
| 2013 | N/A | 0 | 0 | N/A |
| 2014 | ND | 2 | 0 | ND |
| 2015 | ND | 6 | 0 | ND |
| 2016 | ND | 3 | 0 | ND |
| 2017 | ND | 3 | 0 | ND |
| 2018 | ND | 3 | 0 | ND |
| 2019 | ND | 3 | 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 |
|---|---|---|
| 2014-08-19 | AC64332 | ND |
| 2014-08-19 | AC64304 | ND |
| 2015-03-23 | AC85661 | ND |
| 2015-05-28 | AC93641 | ND |
| 2015-09-01 | AD05216 | ND |
| 2015-09-01 | AD05218 | ND |
| 2015-09-01 | AD05224 | ND |
| 2015-11-17 | AD13846 | ND |
| 2016-02-25 | AD25739 | ND |
| 2016-09-08 | AD48510 | ND |
| 2016-09-08 | AD48512 | ND |
| 2017-03-09 | AD74430 | ND |
| 2017-08-01 | AD91611 | ND |
| 2017-08-01 | AD91609 | ND |
| 2018-02-06 | AE12498 | ND |
| 2018-08-02 | AE35598 | ND |
| 2018-08-02 | AE35600 | ND |
| 2019-02-07 | AE53484 | ND |
| 2019-08-15 | AE78986 | ND |
| 2019-08-15 | AE78984 | ND |