trans-1,2-Dichloroethylene
Ontario Municipal Utilities Company
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 | 31 | 0 | ND |
| 2015 | ND | 1 | 0 | ND |
| 2016 | N/A | 0 | 0 | N/A |
| 2017 | ND | 15 | 0 | ND |
| 2018 | N/A | 0 | 0 | N/A |
| 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 |
|---|---|---|
| 2014-07-11 | 4790-045-0825 | ND |
| 2014-07-11 | 4790-020-1020 | ND |
| 2014-07-11 | 4790-017-0925 | ND |
| 2014-07-14 | 4790-048-0910 | ND |
| 2014-07-14 | 4790-046-0800 | ND |
| 2014-07-18 | 4790-042-0900 | ND |
| 2014-07-18 | 4790-027-0930 | ND |
| 2014-07-24 | 4790-031-0915 | ND |
| 2014-07-24 | 4790-029-0830 | ND |
| 2014-07-28 | 4790-026-0900 | ND |
| 2014-07-29 | 4790-040-1040 | ND |
| 2014-07-29 | 4790-034-0945 | ND |
| 2014-07-29 | 4790-025-0950 | ND |
| 2014-07-29 | 4790-022-1020 | ND |
| 2014-08-12 | 4790-049-0800 | ND |
| 2014-08-12 | 4790-040-0845 | ND |
| 2014-08-19 | 4790-034-0900 | ND |
| 2014-08-19 | 4790-032-0815 | ND |
| 2014-10-15 | 4790-017-1000 | ND |
| 2014-10-15 | 4790-025-1100 | ND |
| 2014-10-16 | 4790-045-0815 | ND |
| 2014-10-16 | 4790-048-1000 | ND |
| 2014-10-16 | 4790-046-0910 | ND |
| 2014-10-28 | 4790-044-0800 | ND |
| 2014-10-28 | 4790-043-0820 | ND |
| 2014-10-28 | 4790-041-0850 | ND |
| 2014-11-06 | 4790-022-1010 | ND |
| 2014-11-06 | 4790-026-0915 | ND |
| 2014-11-07 | 4790-030-0930 | ND |
| 2014-12-04 | 4790-027-1020 | ND |
| 2014-12-04 | 4790-042-0945 | ND |
| 2015-05-07 | 4790-050-1042 | ND |
| 2017-02-01 | 4790-050-0831 | ND |
| 2017-04-20 | 4790-030-0910 | ND |
| 2017-07-03 | 4790-042-0910 | ND |
| 2017-07-03 | 4790-043-1110 | ND |
| 2017-07-03 | 4790-044-1015 | ND |
| 2017-07-06 | 4790-025-0955 | ND |
| 2017-07-12 | 4790-041-0815 | ND |
| 2017-07-12 | 4790-034-0910 | ND |
| 2017-07-12 | 4790-031-1130 | ND |
| 2017-07-12 | 4790-049-1055 | ND |
| 2017-07-19 | 4790-020-0730 | ND |
| 2017-07-19 | 4790-026-0930 | ND |
| 2017-07-19 | 4790-032-0835 | ND |
| 2017-07-19 | 4790-045-1050 | ND |
| 2017-08-03 | 4790-048-0815 | ND |
| 2019-10-30 | 4790-040-0826 | ND |