HAY COULEE WATER USERS ASSN
Montana - Community Water System - PWSID: MT0001545
System Information
| PWSID | MT0001545 |
| System Name | HAY COULEE WATER USERS ASSN |
| System Type | Community Water System |
| Water Source | Ground Water Under Influence |
| Activity Status | Non-Inventory |
| Owner Type | Private |
| EPA Region | 08 |
| Serves School | No |
| Wholesaler | No |
| First Reported | Mar 5, 1980 |
| Last Reported | Mar 26, 2026 |
Location & Contact
| State | Montana |
| City | INVERNESS |
| ZIP Code | 59530 |
| Address | BOX 824 |
| Organization | - |
| Phone | 406-456-3235 |
Population & Service
| Population Served | 38 |
| Service Connections | 10 |
Drinking Water Violations (188)
This water system has 188 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Oct 27, 2004 | - | MR | No | No | - | TT | - | Resolved | Nov 12, 2004 | - | |
| Oct 1, 2004 | - | MR | No | No | - | TT | - | Resolved | Nov 12, 2004 | - | |
| Oct 1, 2004 | - | MR | No | No | - | TT | - | Resolved | Nov 12, 2004 | - | |
| Oct 1, 2004 | - | MR | No | No | - | TT | - | Resolved | Nov 12, 2004 | - | |
| Oct 1, 2004 | - | MR | No | No | - | TT | - | Resolved | Nov 12, 2004 | - | |
| Jan 1, 2002 | Dec 31, 2004 | MR | No | Yes | - | 0.002 mg/L | - | Resolved | Nov 12, 2004 | - | |
| Jan 1, 2002 | Dec 31, 2004 | MR | No | Yes | - | 0.004 mg/L | - | Resolved | Nov 12, 2004 | - | |
| Jan 1, 2002 | Dec 31, 2004 | MR | No | Yes | - | 0.010 mg/L | - | Resolved | Nov 12, 2004 | - | |
| Jan 1, 2002 | Dec 31, 2004 | MR | No | Yes | - | - | - | Resolved | Nov 12, 2004 | - | |
| Jan 1, 2002 | Dec 31, 2004 | MR | No | Yes | - | 0.006 mg/L | - | Resolved | Nov 12, 2004 | - | |
| Jun 1, 2001 | Jun 30, 2001 | MR | No | No | - | 5% of samples | - | Resolved | Jun 30, 2001 | - | |
| Jun 1, 2001 | Jun 30, 2001 | MR | No | No | - | 5% of samples | - | Resolved | Jun 30, 2001 | - | |
| Jun 1, 2001 | Jun 30, 2001 | MR | No | No | - | 5% of samples | - | Resolved | Jun 30, 2001 | - | |
| Jun 1, 2001 | Jun 30, 2001 | MR | No | No | - | 5% of samples | - | Resolved | Jun 30, 2001 | - | |
| Jan 1, 1999 | Dec 31, 2001 | MR | No | Yes | - | 0.05 mg/L | - | Resolved | Dec 31, 2001 | - | |
| Jan 1, 1999 | Dec 31, 2001 | MR | No | Yes | - | - | - | Resolved | Dec 31, 2001 | - | |
| Jan 1, 1999 | Dec 31, 2001 | MR | No | Yes | - | 0.0002 mg/L | - | Resolved | Dec 31, 2001 | - | |
| Jan 1, 1999 | Dec 31, 2001 | MR | No | Yes | - | 0.004 mg/L | - | Resolved | Dec 31, 2001 | - | |
| Jan 1, 1999 | Dec 31, 2001 | MR | No | Yes | - | - | - | Resolved | Dec 31, 2001 | - | |
| Jan 1, 1999 | Dec 31, 2001 | MR | No | Yes | - | - | - | Resolved | Dec 31, 2001 | - | |
| Jan 1, 1999 | Dec 31, 2001 | MR | No | Yes | - | - | - | Resolved | Dec 31, 2001 | - | |
| Jan 1, 1999 | Dec 31, 2001 | MR | No | Yes | - | - | - | Resolved | Dec 31, 2001 | - | |
| Jan 1, 1999 | Dec 31, 2001 | MR | No | Yes | - | - | - | Resolved | Dec 31, 2001 | - | |
| Jan 1, 1999 | Dec 31, 2001 | MR | No | Yes | - | 0.00000003 mg/L | - | Resolved | Dec 31, 2001 | - | |
| Jan 1, 1999 | Dec 31, 2001 | MR | No | Yes | - | 0.00000003 mg/L | - | Resolved | Dec 31, 2001 | - | |
| Jan 1, 1999 | Dec 31, 2001 | MR | No | Yes | - | 0.05 mg/L | - | Resolved | Dec 31, 2001 | - | |
| Jan 1, 1999 | Dec 31, 2001 | MR | No | Yes | - | 0.0002 mg/L | - | Resolved | Dec 31, 2001 | - | |
| Jan 1, 1999 | Dec 31, 2001 | MR | No | Yes | - | 0.0005 mg/L | - | Resolved | Dec 31, 2001 | - | |
| Jan 1, 1999 | Dec 31, 2001 | MR | No | Yes | - | 0.0005 mg/L | - | Resolved | Dec 31, 2001 | - | |
| Jan 1, 1999 | Dec 31, 2001 | MR | No | Yes | - | 0.1 mg/L | - | Resolved | Dec 31, 2001 | - | |
| Jan 1, 1999 | Dec 31, 1999 | MR | No | Yes | - | 10 mg/L | - | Resolved | Dec 31, 1999 | - | |
| Jan 1, 1999 | Dec 31, 1999 | MR | No | Yes | - | 10 mg/L | - | Resolved | Dec 31, 1999 | - | |
| Jan 1, 1999 | Dec 31, 1999 | MR | No | Yes | - | 10 mg/L | - | Resolved | Dec 31, 1999 | - | |
| Jan 1, 1999 | Dec 31, 2001 | MR | No | Yes | - | 0.075 mg/L | - | Resolved | Dec 31, 2001 | - | |
| Jan 1, 1999 | Dec 31, 2001 | MR | No | Yes | - | 0.007 mg/L | - | Resolved | Dec 31, 2001 | - | |
| Jan 1, 1999 | Dec 31, 2001 | MR | No | Yes | - | 0.005 mg/L | - | Resolved | Dec 31, 2001 | - | |
| Jan 1, 1999 | Dec 31, 2001 | MR | No | Yes | - | 0.005 mg/L | - | Resolved | Dec 31, 2001 | - | |
| Jan 1, 1999 | Dec 31, 2001 | MR | No | Yes | - | 0.005 mg/L | - | Resolved | Dec 31, 2001 | - | |
| Jan 1, 1999 | Dec 31, 2001 | MR | No | Yes | - | 0.005 mg/L | - | Resolved | Dec 31, 2001 | - | |
| Jan 1, 1999 | Dec 31, 2001 | MR | No | Yes | - | 0.7 mg/L | - | Resolved | Dec 31, 2001 | - | |
| Jan 1, 1999 | Dec 31, 2001 | MR | No | Yes | - | 0.1 mg/L | - | Resolved | Dec 31, 2001 | - | |
| Jan 1, 1999 | Dec 31, 2001 | MR | No | Yes | - | 0.0002 mg/L | - | Resolved | Dec 31, 2001 | - | |
| Jan 1, 1999 | Dec 31, 2001 | MR | No | Yes | - | 0.0002 mg/L | - | Resolved | Dec 31, 2001 | - | |
| Jan 1, 1999 | Dec 31, 2001 | MR | No | Yes | - | 0.04 mg/L | - | Resolved | Dec 31, 2001 | - | |
| Jan 1, 1999 | Dec 31, 2001 | MR | No | Yes | - | 0.2 mg/L | - | Resolved | Dec 31, 2001 | - | |
| Jan 1, 1999 | Dec 31, 2001 | MR | No | Yes | - | 0.2 mg/L | - | Resolved | Dec 31, 2001 | - | |
| Jan 1, 1999 | Dec 31, 2001 | MR | No | Yes | - | 0.02 mg/L | - | Resolved | Dec 31, 2001 | - | |
| Jan 1, 1999 | Dec 31, 2001 | MR | No | Yes | - | 0.02 mg/L | - | Resolved | Dec 31, 2001 | - | |
| Jan 1, 1999 | Dec 31, 2001 | MR | No | Yes | - | 0.1 mg/L | - | Resolved | Dec 31, 2001 | - | |
| Jan 1, 1999 | Dec 31, 2001 | MR | No | Yes | - | 0.004 mg/L | - | Resolved | Dec 31, 2001 | - |
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.