trans-1,2-Dichloroethylene
Southwest Milam Water Supply Corporation
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 | 2 | 0 | ND |
2015 | ND | 3 | 0 | ND |
2016 | ND | 3 | 0 | ND |
2017 | ND | 3 | 0 | ND |
2018 | ND | 3 | 0 | ND |
2019 | ND | 2 | 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 | AC41152 | ND |
2014-02-04 | AC41154 | ND |
2015-05-07 | AC91059 | ND |
2015-05-07 | AC91065 | ND |
2015-05-07 | AC91057 | ND |
2016-11-07 | AD56857 | ND |
2016-11-07 | AD56867 | ND |
2016-11-07 | AD56861 | ND |
2017-11-01 | AE03224 | ND |
2017-11-01 | AE03222 | ND |
2017-11-01 | AE03214 | ND |
2018-10-08 | AE42804 | ND |
2018-10-08 | AE42806 | ND |
2018-10-08 | AE42808 | ND |
2019-07-02 | AE73136 | ND |
2019-07-02 | AE73134 | ND |