Lock and Dam No. 7
Minnesota — Transient Non-Community — PWSID: MN5850140
System Information
| PWSID | MN5850140 |
| System Name | Lock and Dam No. 7 |
| System Type | Transient Non-Community |
| Water Source | Ground Water |
| Activity Status | Active |
| Owner Type | Federal |
| EPA Region | 05 |
| Serves School | No |
| Wholesaler | No |
| First Reported | Jan 23, 1981 |
| Last Reported | Nov 25, 2025 |
Location & Contact
| State | Minnesota |
| City | LaCrescent |
| ZIP Code | 55947 |
| Address | DA Corps of Engineers |
| Organization | Lock and Dam No. 7 |
| Phone | — |
Population & Service
| Population Served | 600 |
| Service Connections | 2 |
Drinking Water Violations (7)
This water system has 7 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Jan 1, 1997 | Dec 31, 1997 | Coliform (TCR) | MCL | Yes | No | — | 5% of samples | — | Resolved | Jun 30, 1997 | Total Coliform Rule |
| Jan 1, 1997 | Dec 31, 1997 | Coliform (TCR) | MCL | Yes | No | — | 5% of samples | — | Resolved | Jun 30, 1997 | Total Coliform Rule |
| Jan 1, 1997 | Dec 31, 1997 | Coliform (TCR) | MCL | Yes | No | — | 5% of samples | — | Resolved | Jun 30, 1997 | Total Coliform Rule |
| Jan 1, 1997 | Dec 31, 1997 | Coliform (TCR) | MCL | Yes | No | — | 5% of samples | — | Resolved | Jun 30, 1997 | Total Coliform Rule |
| Jan 1, 1997 | Dec 31, 1997 | Coliform (TCR) | MCL | Yes | No | — | 5% of samples | — | Resolved | Jun 30, 1997 | Total Coliform Rule |
| Jan 1, 1997 | Dec 31, 1997 | Coliform (TCR) | MCL | Yes | No | — | 5% of samples | — | Resolved | Jun 30, 1997 | Total Coliform Rule |
| Jan 1, 1997 | Dec 31, 1997 | Coliform (TCR) | MCL | Yes | No | — | 5% of samples | — | Resolved | Jun 30, 1997 | Total Coliform Rule |
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.