trans-1,2-Dichloroethylene
Summit Township Water Authority
NOTE: Summit Township Water Authority purchases water from Erie City Water Authority which is required to test for trans-1,2-dichloroethylene. Sample information shown below was taken by 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 |
|---|---|---|---|---|
| 2018 | ND | 2 | 0 | ND |
| 2019 | ND | 6 | 0 | ND |
| 2020 | ND | 3 | 0 | ND |
| 2021 | ND | 1 | 0 | ND |
| 2022 | ND | 1 | 0 | ND |
| 2023 | ND | 1 | 0 | ND |
ppb = parts per billion
State, National, and Health Guidelines for Drinking Water
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
NOTE: Summit Township Water Authority purchases water from Erie City Water Authority which is required to test for trans-1,2-dichloroethylene. Sample information shown below was taken by Erie City Water Authority.
| Date | Lab ID | Result |
|---|---|---|
| 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 | 9112945-01 | ND |
| 2019-11-18 | 4489097 | ND |
| 2020-03-19 | 21954384.00 | ND |
| 2020-05-18 | 22336341.00 | ND |
| 2020-09-09 | 23112180.00 | ND |
| 2021-04-06 | 24363633.00 | ND |
| 2021-05-19 | 24561037.00 | ND |
| 2022-04-12 | 26577561.00 | ND |
| 2022-05-17 | 26770594.00 | ND |
| 2023-04-04 | 28825969.00 | ND |
| 2023-04-18 | 28826027.00 | ND |