trans-1,2-Dichloroethylene
Harris County FWSD 61
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 | ND | 1 | 0 | ND |
2015 | ND | 6 | 0 | ND |
2016 | ND | 4 | 0 | ND |
2017 | ND | 4 | 0 | ND |
2018 | ND | 4 | 0 | ND |
2019 | ND | 4 | 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 |
---|---|---|
2014-02-04 | AC41253 | ND |
2015-04-01 | AC86960 | ND |
2015-04-01 | AC86966 | ND |
2015-04-01 | AC86972 | ND |
2015-04-01 | AC86968 | ND |
2015-09-18 | AD07856 | ND |
2015-10-12 | AD10264 | ND |
2016-01-12 | AD17578 | ND |
2016-01-12 | AD17584 | ND |
2016-01-12 | AD17592 | ND |
2016-01-12 | AD17582 | ND |
2017-02-02 | AD68419 | ND |
2017-02-02 | AD68455 | ND |
2017-02-02 | AD68425 | ND |
2017-02-02 | AD68423 | ND |
2018-03-01 | AE16318 | ND |
2018-03-01 | AE16344 | ND |
2018-03-01 | AE16320 | ND |
2018-03-01 | AE16316 | ND |
2019-01-09 | AE49217 | ND |
2019-01-09 | AE49223 | ND |
2019-01-09 | AE49221 | ND |
2019-01-09 | AE49215 | ND |