MOUNT VERNON
South Dakota - Community Water System - PWSID: SD4600220
System Information
| PWSID | SD4600220 |
| System Name | MOUNT VERNON |
| System Type | Community Water System |
| Water Source | Surface Water Purchased |
| Activity Status | Active |
| Owner Type | Local |
| EPA Region | 08 |
| Serves School | No |
| Wholesaler | No |
| First Reported | Feb 13, 1979 |
| Last Reported | Mar 2, 2026 |
Location & Contact
| State | South Dakota |
| City | MOUNT VERNON |
| ZIP Code | 57363 |
| Address | PO BOX 52 |
| Organization | MOUNT VERNON |
| Phone | 6052365207 |
Population & Service
| Population Served | 461 |
| Service Connections | 204 |
Drinking Water Violations (39)
This water system has 39 violations recorded in the EPA SDWIS database.
| Begin Date | End Date | Contaminant | Category | Health-Based | Major | Measured | Federal MCL | State MCL | Status | Return to Compliance | Rule |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Feb 1, 2020 | - | TT | Yes | No | - | - | - | Resolved | May 13, 2020 | - | |
| Feb 1, 2020 | - | TT | Yes | No | - | - | - | Resolved | May 13, 2020 | - | |
| Aug 1, 1996 | Aug 31, 1996 | MR | No | No | - | 5% of samples | - | Resolved | Aug 31, 1996 | - | |
| Aug 1, 1996 | Aug 31, 1996 | MR | No | No | - | 5% of samples | - | Resolved | Aug 31, 1996 | - | |
| Aug 1, 1996 | Aug 31, 1996 | MR | No | No | - | 5% of samples | - | Resolved | Aug 31, 1996 | - | |
| Sep 1, 1995 | Sep 30, 1995 | MCL | Yes | No | - | 5% of samples | - | Resolved | Sep 30, 1995 | - | |
| Sep 1, 1995 | Sep 30, 1995 | MCL | Yes | No | - | 5% of samples | - | Resolved | Sep 30, 1995 | - | |
| Sep 1, 1995 | Sep 30, 1995 | MCL | Yes | No | - | 5% of samples | - | Resolved | Sep 30, 1995 | - | |
| Aug 1, 1995 | Aug 31, 1995 | MCL | Yes | No | - | 5% of samples | - | Resolved | Aug 31, 1995 | - | |
| Aug 1, 1995 | Aug 31, 1995 | MCL | Yes | No | - | 5% of samples | - | Resolved | Aug 31, 1995 | - | |
| Aug 1, 1995 | Aug 31, 1995 | MCL | Yes | No | - | 5% of samples | - | Resolved | Aug 31, 1995 | - | |
| Jul 1, 1995 | Jul 31, 1995 | MCL | Yes | No | - | 5% of samples | - | Resolved | Jul 31, 1995 | - | |
| Jul 1, 1995 | Jul 31, 1995 | MCL | Yes | No | - | 5% of samples | - | Resolved | Jul 31, 1995 | - | |
| Jul 1, 1995 | Jul 31, 1995 | MCL | Yes | No | - | 5% of samples | - | Resolved | Jul 31, 1995 | - | |
| Jul 1, 1995 | Jul 31, 1995 | MR | No | No | - | 5% of samples | - | Resolved | Jul 31, 1995 | - | |
| Jul 1, 1995 | Jul 31, 1995 | MR | No | No | - | 5% of samples | - | Resolved | Jul 31, 1995 | - | |
| Jul 1, 1995 | Jul 31, 1995 | MR | No | No | - | 5% of samples | - | Resolved | Jul 31, 1995 | - | |
| Jun 1, 1995 | Jun 30, 1995 | MR | No | Yes | - | 5% of samples | - | Resolved | Jun 30, 1995 | - | |
| Jun 1, 1995 | Jun 30, 1995 | MR | No | Yes | - | 5% of samples | - | Resolved | Jun 30, 1995 | - | |
| Jun 1, 1995 | Jun 30, 1995 | MR | No | Yes | - | 5% of samples | - | Resolved | Jun 30, 1995 | - | |
| Jun 1, 1995 | Jun 30, 1995 | MCL | Yes | No | - | 5% of samples | - | Resolved | Jun 30, 1995 | - | |
| Jun 1, 1995 | Jun 30, 1995 | MCL | Yes | No | - | 5% of samples | - | Resolved | Jun 30, 1995 | - | |
| Jun 1, 1995 | Jun 30, 1995 | MCL | Yes | No | - | 5% of samples | - | Resolved | Jun 30, 1995 | - | |
| Jul 1, 1994 | Jul 31, 1994 | MR | No | Yes | - | 5% of samples | - | Resolved | Jul 31, 1994 | - | |
| Jul 1, 1994 | Jul 31, 1994 | MR | No | Yes | - | 5% of samples | - | Resolved | Jul 31, 1994 | - | |
| Jul 1, 1994 | Jul 31, 1994 | MR | No | Yes | - | 5% of samples | - | Resolved | Jul 31, 1994 | - | |
| Jun 1, 1994 | Jun 30, 1994 | MCL | Yes | No | - | 5% of samples | - | Resolved | Jun 30, 1994 | - | |
| Jun 1, 1994 | Jun 30, 1994 | MCL | Yes | No | - | 5% of samples | - | Resolved | Jun 30, 1994 | - | |
| Jun 1, 1994 | Jun 30, 1994 | MCL | Yes | No | - | 5% of samples | - | Resolved | Jun 30, 1994 | - | |
| Jul 1, 1991 | Jul 31, 1991 | MR | No | No | - | 5% of samples | - | Archived | Jul 31, 1991 | - | |
| Jul 1, 1991 | Jul 31, 1991 | MR | No | No | - | 5% of samples | - | Archived | Jul 31, 1991 | - | |
| Jul 1, 1976 | Jun 30, 1980 | MR | No | No | - | 15 pCi/L | - | Archived | Jun 30, 1980 | - | |
| Jul 1, 1976 | Jun 30, 1980 | MR | No | No | - | 5 pCi/L | - | Archived | Jun 30, 1980 | - | |
| - | - | - | No | No | - | - | - | - | - | - | |
| - | - | - | No | No | - | - | - | - | - | - | |
| - | - | - | No | No | - | - | - | - | - | - | |
| - | - | - | No | No | - | - | - | - | - | - | |
| - | - | - | No | No | - | - | - | - | - | - | |
| - | - | - | No | No | - | - | - | - | - | - |
About This Water System
Public water system data comes from the EPA Safe Drinking Water Information System (SDWIS). Systems with violations must notify customers. Contact your water utility for the latest annual water quality report.