1,1-Dichloroethylene
Concho Rural Water Grape Creek
NOTE: Concho Rural Water Grape Creek purchases water from City of San Angelo which is required to test for 1,1-dichloroethylene. Sample information shown below was taken by City of San Angelo.
1,1-Dichloroethylene is used for plastics production. It damages DNA and causes cancer in laboratory animal studies.
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 | 4 | 0 | ND |
| 2019 | ND | 4 | 0 | ND |
| 2020 | ND | 4 | 0 | ND |
| 2021 | ND | 4 | 0 | ND |
| 2022 | ND | 4 | 0 | ND |
| 2023 | ND | 4 | 0 | ND |
ppb = parts per billion
State, National, and Health Guidelines for Drinking Water
EPA Maximum Contaminant
Level (MCL): 7 ppb
The legal limit for 1,1-dichloroethylene, established in 1987, was based on a toxicity study conducted in laboratory animals in the 1980s.
ppb = parts per billion
All test results
NOTE: Concho Rural Water Grape Creek purchases water from City of San Angelo which is required to test for 1,1-dichloroethylene. Sample information shown below was taken by City of San Angelo.
| Date | Lab ID | Result |
|---|---|---|
| 2018-02-28 | Q1808687007 | ND |
| 2019-05-07 | Q1920785002 | ND |
| 2020-02-18 | Q2006105001 | ND |
| 2021-04-27 | Q2110656002 | ND |
| 2022-02-14 | Q2205298009 | ND |
| 2023-02-15 | Q2306325010 | ND |