trans-1,2-Dichloroethylene
Beaumont Cherry Valley WD
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 |
|---|---|---|---|---|
| 2013 | N/A | 0 | 0 | N/A |
| 2014 | N/A | 0 | 0 | N/A |
| 2015 | ND | 2 | 0 | ND |
| 2016 | ND | 12 | 0 | ND |
| 2017 | ND | 1 | 0 | ND |
| 2018 | ND | 3 | 0 | ND |
| 2019 | ND | 9 | 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 |
|---|---|---|
| 2015-12-02 | 4790-025-0850 | ND |
| 2015-12-03 | 4790-025-0952 | ND |
| 2016-12-01 | 4790-005-1230 | ND |
| 2016-12-01 | 4790-007-1323 | ND |
| 2016-12-01 | 4790-011-0818 | ND |
| 2016-12-01 | 4790-012-0926 | ND |
| 2016-12-01 | 4790-026-0721 | ND |
| 2016-12-01 | 4790-013-0905 | ND |
| 2016-12-01 | 4790-015-1343 | ND |
| 2016-12-01 | 4790-023-1035 | ND |
| 2016-12-01 | 4790-020-0845 | ND |
| 2016-12-01 | 4790-022-1017 | ND |
| 2016-12-08 | 4790-031-0750 | ND |
| 2016-12-08 | 4790-017-0841 | ND |
| 2017-10-02 | 4790-006-0915 | ND |
| 2018-12-13 | 4790-021-1115 | ND |
| 2018-12-18 | 4790-025-1038 | ND |
| 2018-12-18 | 4790-031-1338 | ND |
| 2019-12-03 | 4790-020-1018 | ND |
| 2019-12-03 | 4790-015-0933 | ND |
| 2019-12-03 | 4790-013-0908 | ND |
| 2019-12-03 | 4790-012-1108 | ND |
| 2019-12-03 | 4790-007-1422 | ND |
| 2019-12-04 | 4790-022-1408 | ND |
| 2019-12-04 | 4790-017-1010 | ND |
| 2019-12-04 | 4790-023-1158 | ND |
| 2019-12-04 | 4790-026-0838 | ND |