Keystone
PWSID: SD4601082
System Details
| Population Served | 349 |
| Service Connections | 249 |
| Water Source | Groundwater |
| System Type | Community Water System |
| Owner | Local Government |
| Status | Active |
| City | Keystone |
| Zip Code | 57751 |
Areas Served
- Keystone, Pennington County, 57751
Lead & Copper Testing
| Contaminant | Level | EPA Action Level | Status |
|---|
| Lead (90th percentile) | 0.0070 mg/L | 0.015 mg/L | Below Action Level |
| Lead (90th percentile) | 0.0040 mg/L | 0.015 mg/L | Below Action Level |
| Lead (90th percentile) | 0.0030 mg/L | 0.015 mg/L | Below Action Level |
| Lead (90th percentile) | 0.0010 mg/L | 0.015 mg/L | Below Action Level |
Violation History (4 total)
| Contaminant | Violation | Date | Health-Based | Status |
|---|
| | 2019-01-01 | Major | Returned to Compliance |
| | 2019-01-01 | Major | Returned to Compliance |
| | 2019-01-01 | Major | Returned to Compliance |
| | 2010-10-01 | | Returned to Compliance |