trans-1,2-Dichloroethylene
San Antonio Water Company
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 | N/A | 0 | 0 | N/A |
2015 | N/A | 0 | 0 | N/A |
2016 | ND | 11 | 0 | ND |
2017 | N/A | 0 | 0 | N/A |
2018 | N/A | 0 | 0 | N/A |
2019 | ND | 10 | 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 |
---|---|---|
2016-07-19 | 3761-001-0945 | ND |
2016-07-19 | 3761-018-1122 | ND |
2016-07-19 | 3761-017-1143 | ND |
2016-07-19 | 3761-003-1215 | ND |
2016-07-19 | 3761-013-1153 | ND |
2016-07-19 | 3761-011-1228 | ND |
2016-07-26 | 3761-021-1200 | ND |
2016-07-26 | 3761-016-1352 | ND |
2016-07-26 | 3761-010-0908 | ND |
2016-07-26 | 3761-004-0940 | ND |
2016-07-26 | 3761-002-1030 | ND |
2019-07-15 | 3761-010-1945 | ND |
2019-07-16 | 3761-011-1250 | ND |
2019-07-16 | 3761-013-1350 | ND |
2019-07-16 | 3761-003-1305 | ND |
2019-07-16 | 3761-016-1200 | ND |
2019-07-16 | 3761-002-1140 | ND |
2019-07-16 | 3761-017-1330 | ND |
2019-07-16 | 3761-018-1130 | ND |
2019-07-16 | 3761-001-1100 | ND |
2019-07-17 | 3761-004-0800 | ND |