trans-1,2-Dichloroethylene
City of Georgetown
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 |
|---|---|---|---|---|
| 2012 | ND | 3 | 0 | ND |
| 2013 | ND | 3 | 0 | ND |
| 2014 | ND | 3 | 0 | ND |
| 2015 | ND | 3 | 0 | ND |
| 2016 | ND | 4 | 0 | ND |
| 2017 | 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 |
|---|---|---|
| 2012-07-12 | AB95153 | ND |
| 2012-07-12 | AB95151 | ND |
| 2012-07-12 | AB95155 | ND |
| 2013-08-29 | Q1306583003 | ND |
| 2013-08-29 | Q1306583001 | ND |
| 2013-09-25 | Q1308517001 | ND |
| 2014-09-25 | AC68260 | ND |
| 2014-09-25 | AC68264 | ND |
| 2014-09-25 | AC68258 | ND |
| 2015-09-15 | AD07139 | ND |
| 2015-09-15 | AD07147 | ND |
| 2015-09-15 | AD07149 | ND |
| 2016-04-21 | AD33769 | ND |
| 2016-09-09 | AD48628 | ND |
| 2016-09-09 | AD48634 | ND |
| 2016-09-09 | AD48630 | ND |
| 2017-07-06 | AD88506 | ND |
| 2017-07-06 | AD88508 | ND |
| 2017-07-06 | AD88510 | ND |