GreyStone MHP
Minnesota — Community Water System — PWSID: MN1020005
System Information
| PWSID | MN1020005 |
| System Name | GreyStone MHP |
| System Type | Community Water System |
| Water Source | Ground Water |
| Activity Status | Active |
| Owner Type | Private |
| EPA Region | 05 |
| Serves School | No |
| Wholesaler | No |
| First Reported | Jan 24, 1981 |
| Last Reported | Feb 25, 2026 |
Location & Contact
| State | Minnesota |
| City | Watertown |
| ZIP Code | 55388 |
| Address | 100 Angel Avenue SW |
| Organization | GreyStone LLC c/o Sara Griffith |
| Phone | 6126180946 |
Population & Service
| Population Served | 500 |
| Service Connections | 163 |
Drinking Water Violations (65)
This water system has 65 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Jul 1, 2017 | Sep 30, 2017 | MON | No | Yes | — | — | — | Resolved | Sep 30, 2017 | — | |
| Jul 1, 2017 | Sep 30, 2017 | MON | No | Yes | — | — | — | Resolved | Sep 30, 2017 | — | |
| Jul 1, 2017 | Sep 30, 2017 | MON | No | Yes | — | — | — | Resolved | Sep 30, 2017 | — | |
| Jul 1, 2017 | Sep 30, 2017 | MON | No | Yes | — | — | — | Resolved | Sep 30, 2017 | — | |
| Jul 1, 2017 | Sep 30, 2017 | MR | No | Yes | — | 4.0 mg/L | — | Resolved | Sep 30, 2017 | — | |
| Jul 1, 2017 | Sep 30, 2017 | MR | No | Yes | — | 4.0 mg/L | — | Resolved | Sep 30, 2017 | — | |
| Jul 1, 2017 | Sep 30, 2017 | MR | No | Yes | — | 4.0 mg/L | — | Resolved | Sep 30, 2017 | — | |
| Jul 1, 2014 | Sep 30, 2014 | MR | No | Yes | — | 4.0 mg/L | — | Resolved | Sep 30, 2014 | — | |
| Jul 1, 2014 | Sep 30, 2014 | MR | No | No | — | 5% of samples | — | Resolved | Sep 30, 2014 | — | |
| Jul 1, 2014 | Sep 30, 2014 | MR | No | No | — | 5% of samples | — | Resolved | Sep 30, 2014 | — | |
| Jul 1, 2014 | Sep 30, 2014 | MR | No | No | — | 5% of samples | — | Resolved | Sep 30, 2014 | — | |
| Jul 1, 2014 | Sep 30, 2014 | MR | No | Yes | — | 4.0 mg/L | — | Resolved | Sep 30, 2014 | — | |
| Jul 1, 2014 | Sep 30, 2014 | MR | No | Yes | — | 4.0 mg/L | — | Resolved | Sep 30, 2014 | — | |
| Oct 1, 2012 | — | MR | No | No | — | TT | — | Resolved | Nov 1, 2012 | — | |
| Oct 1, 2012 | — | MR | No | No | — | TT | — | Resolved | Nov 1, 2012 | — | |
| Oct 1, 2012 | — | MR | No | No | — | TT | — | Resolved | Nov 1, 2012 | — | |
| Oct 1, 2012 | — | MR | No | No | — | TT | — | Resolved | Nov 1, 2012 | — | |
| Oct 1, 2012 | — | MR | No | No | — | TT | — | Resolved | Nov 1, 2012 | — | |
| Oct 1, 2012 | — | MR | No | No | — | TT | — | Resolved | Nov 1, 2012 | — | |
| Oct 1, 2012 | — | MR | No | No | — | TT | — | Resolved | Nov 1, 2012 | — | |
| Oct 1, 2012 | Dec 31, 2012 | MR | No | Yes | — | 4.0 mg/L | — | Resolved | Dec 31, 2012 | — | |
| Oct 1, 2012 | Dec 31, 2012 | MR | No | Yes | — | 4.0 mg/L | — | Resolved | Dec 31, 2012 | — | |
| Oct 1, 2012 | Dec 31, 2012 | MR | No | Yes | — | 4.0 mg/L | — | Resolved | Dec 31, 2012 | — | |
| Oct 1, 2012 | Dec 31, 2012 | MR | No | Yes | — | 4.0 mg/L | — | Resolved | Dec 31, 2012 | — | |
| Jul 1, 2012 | Sep 30, 2012 | MR | No | No | — | 5% of samples | — | Resolved | Sep 30, 2012 | — | |
| Jul 1, 2012 | Sep 30, 2012 | MR | No | No | — | 5% of samples | — | Resolved | Sep 30, 2012 | — | |
| Jul 1, 2012 | Sep 30, 2012 | MR | No | No | — | 5% of samples | — | Resolved | Sep 30, 2012 | — | |
| Jul 1, 2012 | Sep 30, 2012 | MR | No | Yes | — | 4.0 mg/L | — | Resolved | Sep 30, 2012 | — | |
| Jul 1, 2012 | Sep 30, 2012 | MR | No | Yes | — | 4.0 mg/L | — | Resolved | Sep 30, 2012 | — | |
| Jul 1, 2012 | Sep 30, 2012 | MR | No | No | — | 5% of samples | — | Resolved | Sep 30, 2012 | — | |
| Jul 1, 2012 | Sep 30, 2012 | MR | No | Yes | — | 4.0 mg/L | — | Resolved | Sep 30, 2012 | — | |
| Jul 1, 2010 | Sep 30, 2010 | MR | No | Yes | — | 4.0 mg/L | — | Resolved | Sep 30, 2010 | — | |
| Jul 1, 2010 | Sep 30, 2010 | MR | No | No | — | 5% of samples | — | Resolved | Sep 30, 2010 | — | |
| Jul 1, 2010 | Sep 30, 2010 | MR | No | No | — | 5% of samples | — | Resolved | Sep 30, 2010 | — | |
| Jul 1, 2010 | Sep 30, 2010 | MR | No | No | — | 5% of samples | — | Resolved | Sep 30, 2010 | — | |
| Jul 1, 2010 | Sep 30, 2010 | MR | No | No | — | 5% of samples | — | Resolved | Sep 30, 2010 | — | |
| Jul 1, 2010 | Sep 30, 2010 | MR | No | No | — | 5% of samples | — | Resolved | Sep 30, 2010 | — | |
| Jul 1, 2010 | Sep 30, 2010 | MR | No | Yes | — | 4.0 mg/L | — | Resolved | Sep 30, 2010 | — | |
| Jul 1, 2010 | Sep 30, 2010 | MR | No | Yes | — | 4.0 mg/L | — | Resolved | Sep 30, 2010 | — | |
| Jul 1, 2010 | Sep 30, 2010 | MR | No | Yes | — | 4.0 mg/L | — | Resolved | Sep 30, 2010 | — | |
| Oct 1, 2009 | Dec 31, 2009 | MR | No | Yes | — | 4.0 mg/L | — | Resolved | Dec 31, 2009 | — | |
| Oct 1, 2009 | Dec 31, 2009 | MR | No | No | — | 5% of samples | — | Resolved | Dec 31, 2009 | — | |
| Oct 1, 2009 | Dec 31, 2009 | MR | No | No | — | 5% of samples | — | Resolved | Dec 31, 2009 | — | |
| Oct 1, 2009 | Dec 31, 2009 | MR | No | No | — | 5% of samples | — | Resolved | Dec 31, 2009 | — | |
| Oct 1, 2009 | Dec 31, 2009 | MR | No | No | — | 5% of samples | — | Resolved | Dec 31, 2009 | — | |
| Oct 1, 2009 | Dec 31, 2009 | MR | No | Yes | — | 4.0 mg/L | — | Resolved | Dec 31, 2009 | — | |
| Oct 1, 2009 | Dec 31, 2009 | MR | No | Yes | — | 4.0 mg/L | — | Resolved | Dec 31, 2009 | — | |
| Oct 1, 2009 | Dec 31, 2009 | MR | No | Yes | — | 4.0 mg/L | — | Resolved | Dec 31, 2009 | — | |
| Oct 1, 2009 | Dec 31, 2009 | MR | No | Yes | — | 4.0 mg/L | — | Resolved | Dec 31, 2009 | — | |
| Jan 1, 1996 | — | MR | No | No | — | TT | — | Resolved | Dec 31, 1999 | — |
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.