trans-1,2-Dichloroethylene
San Diego County Water Authority
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 | 5 | 0 | ND |
2015 | ND | 4 | 0 | ND |
2016 | ND | 4 | 0 | ND |
2017 | ND | 4 | 0 | ND |
2018 | ND | 4 | 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 |
---|---|---|
2014-02-05 | 9590-003-1102 | ND |
2014-04-09 | 9590-003-1424 | ND |
2014-07-24 | 9590-003-1229 | ND |
2014-12-16 | 9590-003-1143 | ND |
2014-12-29 | 9590-001-1010 | ND |
2015-01-05 | 9590-003-1039 | ND |
2015-04-08 | 9590-003-1429 | ND |
2015-08-25 | 9590-003-1333 | ND |
2015-10-20 | 9590-003-1202 | ND |
2016-02-10 | 9590-003-1340 | ND |
2016-06-16 | 9590-003-1435 | ND |
2016-08-02 | 9590-003-1135 | ND |
2016-11-29 | 9590-003-1309 | ND |
2017-03-30 | 9590-003-1230 | ND |
2017-06-14 | 9590-003-0942 | ND |
2017-07-05 | 9590-003-1134 | ND |
2017-10-16 | 9590-003-1305 | ND |
2018-01-03 | 9590-003-1215 | ND |
2018-04-10 | 9590-003-1230 | ND |
2018-09-17 | 9590-003-1218 | ND |
2018-10-01 | 9590-003-1326 | ND |
2019-06-13 | 9590-003-1044 | ND |
2019-09-17 | 9590-003-1230 | ND |
2019-12-11 | 9590-003-0724 | ND |