trans-1,2-Dichloroethylene
Florin County Water District
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 |
|---|---|---|---|---|
| 2014 | ND | 7 | 0 | ND |
| 2015 | ND | 17 | 0 | ND |
| 2016 | N/A | 0 | 0 | N/A |
| 2017 | N/A | 0 | 0 | N/A |
| 2018 | ND | 6 | 0 | ND |
| 2019 | ND | 1 | 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 |
|---|---|---|
| 2014-04-30 | 5810-009-1200 | ND |
| 2014-04-30 | 5810-007-0841 | ND |
| 2014-04-30 | 5810-006-1241 | ND |
| 2014-04-30 | 5810-004-1054 | ND |
| 2014-04-30 | 5810-003-0927 | ND |
| 2014-04-30 | 5810-002-1017 | ND |
| 2014-08-07 | 5810-010-1305 | ND |
| 2015-02-11 | 5810-004-1115 | ND |
| 2015-02-11 | 5810-006-1402 | ND |
| 2015-02-11 | 5810-007-0906 | ND |
| 2015-02-11 | 5810-012-0948 | ND |
| 2015-02-11 | 5810-010-1305 | ND |
| 2015-02-11 | 5810-009-1216 | ND |
| 2015-05-27 | 5810-009-1159 | ND |
| 2015-05-27 | 5810-012-0923 | ND |
| 2015-05-27 | 5810-003-1012 | ND |
| 2015-05-27 | 5810-006-1258 | ND |
| 2015-05-27 | 5810-004-1053 | ND |
| 2015-09-23 | 5810-009-1247 | ND |
| 2015-09-23 | 5810-007-0932 | ND |
| 2015-09-23 | 5810-012-1009 | ND |
| 2015-09-23 | 5810-006-1336 | ND |
| 2015-09-23 | 5810-004-1147 | ND |
| 2015-09-23 | 5810-003-1044 | ND |
| 2018-05-08 | 5810-009-0944 | ND |
| 2018-06-14 | 5810-010-1209 | ND |
| 2018-06-14 | 5810-007-0916 | ND |
| 2018-06-14 | 5810-012-0950 | ND |
| 2018-06-14 | 5810-006-1316 | ND |
| 2018-06-14 | 5810-003-1028 | ND |
| 2019-12-12 | 5810-008-1405 | ND |