trans-1,2-Dichloroethylene
Newhall CWD-Newhall
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 | ND | 7 | 0 | ND |
| 2015 | ND | 8 | 0 | ND |
| 2016 | ND | 8 | 0 | ND |
| 2017 | ND | 9 | 0 | ND |
| 2018 | ND | 4 | 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 |
|---|---|---|
| 2014-01-16 | 9590-007-1105 | ND |
| 2014-04-10 | 9590-007-0936 | ND |
| 2014-05-29 | 9590-006-0955 | ND |
| 2014-07-17 | 9590-007-0850 | ND |
| 2014-07-17 | 9590-006-0825 | ND |
| 2014-10-13 | 9590-007-1037 | ND |
| 2014-10-13 | 9590-006-1005 | ND |
| 2015-01-15 | 9590-006-1023 | ND |
| 2015-01-15 | 9590-007-0925 | ND |
| 2015-04-23 | 9590-006-1100 | ND |
| 2015-04-23 | 9590-007-1118 | ND |
| 2015-07-16 | 9590-006-0910 | ND |
| 2015-07-16 | 9590-007-0925 | ND |
| 2015-10-15 | 9590-006-0920 | ND |
| 2015-10-15 | 9590-007-0930 | ND |
| 2016-01-07 | 9590-006-0855 | ND |
| 2016-01-07 | 9590-007-0930 | ND |
| 2016-04-14 | 9590-006-1115 | ND |
| 2016-04-14 | 9590-007-1055 | ND |
| 2016-07-21 | 9590-007-0815 | ND |
| 2016-07-21 | 9590-006-0858 | ND |
| 2016-10-06 | 9590-007-1115 | ND |
| 2016-10-06 | 9590-006-1045 | ND |
| 2017-01-12 | 9590-006-0855 | ND |
| 2017-02-23 | 9590-007-1155 | ND |
| 2017-04-13 | 9590-007-0911 | ND |
| 2017-04-13 | 9590-007-0900 | ND |
| 2017-04-13 | 9590-006-0930 | ND |
| 2017-04-13 | 9590-006-0940 | ND |
| 2017-07-13 | 9590-007-1000 | ND |
| 2017-07-13 | 9590-006-0840 | ND |
| 2017-10-19 | 9590-007-0945 | ND |
| 2018-01-11 | 9590-007-1028 | ND |
| 2018-04-05 | 2104-007-1105 | ND |
| 2018-04-05 | 2104-006-1125 | ND |
| 2018-11-20 | 2104-007-1340 | ND |
| 2019-04-18 | 9590-007-0855 | ND |
| 2019-04-18 | 9590-006-0835 | ND |