trans-1,2-Dichloroethylene
Erie City 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.
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 | 6 | 0 | ND |
| 2015 | ND | 4 | 0 | ND |
| 2016 | ND | 3 | 0 | ND |
| 2017 | 1.60 ppb | 3 | 1 | ND - 4.80 ppb |
| 2018 | ND | 7 | 0 | ND |
| 2019 | ND | 5 | 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 |
|---|---|---|
| 2014-05-13 | 3024701 | ND |
| 2014-05-13 | 3024701 | ND |
| 2014-08-19 | 3086006 | ND |
| 2014-08-19 | 3086006 | ND |
| 2014-09-23 | 3109579 | ND |
| 2014-09-23 | 3109579 | ND |
| 2015-04-15 | 12962967 | ND |
| 2015-05-06 | 13585639 | ND |
| 2015-08-18 | 13341537 | ND |
| 2015-09-17 | 13585710 | ND |
| 2016-05-24 | 14506994 | ND |
| 2016-07-20 | 14841764 | ND |
| 2016-08-23 | 15015257 | ND |
| 2017-05-16 | 16355410 | ND |
| 2017-07-13 | 16506436 | 4.80 ppb |
| 2017-09-20 | 16822104 | ND |
| 2018-01-08 | 3849232 | ND |
| 2018-02-20 | 3876401 | ND |
| 2018-05-08 | 3931239 | ND |
| 2018-05-21 | 3941491 | ND |
| 2018-08-06 | 4012683 | ND |
| 2018-08-21 | 4030524 | ND |
| 2018-11-05 | 4111318 | ND |
| 2019-01-23 | 4181796 | ND |
| 2019-05-21 | 4302831 | ND |
| 2019-09-10 | 4415500 | ND |
| 2019-11-18 | 4489097 | ND |
| 2019-11-18 | 9112945-01 | ND |