cis-1,2-Dichloroethylene
Ruth Water District
NOTE: Ruth Water District purchases water from Ely Municipal Water Department which is required to test for cis-1,2-dichloroethylene. Sample information shown below was taken by Ely Municipal Water Department.
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 | 1 | 0 | ND |
| 2019 | ND | 4 | 0 | ND |
| 2020 | ND | 1 | 0 | ND |
| 2021 | ND | 1 | 0 | ND |
| 2022 | ND | 6 | 0 | ND |
| 2023 | N/A | 0 | 0 | N/A |
ppb = parts per billion
State, National, and Health Guidelines for Drinking Water
EPA Maximum Contaminant
Level (MCL): 70 ppb
The legal limit for cis-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: Ruth Water District purchases water from Ely Municipal Water Department which is required to test for cis-1,2-dichloroethylene. Sample information shown below was taken by Ely Municipal Water Department.
| Date | Lab ID | Result |
|---|---|---|
| 2018-11-08 | 18110223-007 | ND |
| 2019-11-14 | 19110404-002 | ND |
| 2019-11-14 | 19110404-003 | ND |
| 2019-11-14 | 19110404-005 | ND |
| 2019-11-21 | 19110631-001 | ND |
| 2020-12-22 | 202012290116 | ND |
| 2021-12-09 | 202112150655 | ND |
| 2022-01-13 | 202201200473 | ND |
| 2022-05-12 | 22050451-001 | ND |
| 2022-05-12 | 22050451-002 | ND |
| 2022-07-07 | 22070169-002 | ND |
| 2022-07-07 | 22070169-003 | ND |
| 2022-07-07 | 22070169-004 | ND |