CASCADE COLONY
Montana — Community Water System — PWSID: MT0001738
System Information
| PWSID | MT0001738 |
| System Name | CASCADE COLONY |
| System Type | Community Water System |
| Water Source | Ground Water |
| Activity Status | Active |
| Owner Type | Private |
| EPA Region | 08 |
| Serves School | No |
| Wholesaler | No |
| First Reported | Mar 5, 1980 |
| Last Reported | Jan 5, 2026 |
Location & Contact
| State | Montana |
| City | SUN RIVER |
| ZIP Code | 59483 |
| Address | 508 BIRDTAIL CREEK ROAD |
| Organization | ENTZ, PETER |
| Phone | 406-264-5265 |
Population & Service
| Population Served | 105 |
| Service Connections | 20 |
Drinking Water Violations (5)
This water system has 5 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, 2018 | Mar 31, 2018 | Combined Radium (-226 and -228) | MR | No | Yes | — | 5 pCi/L | — | Resolved | Mar 31, 2018 | Radionuclides and Revised Rad Rule |
| Jan 1, 2018 | Mar 31, 2018 | Combined Radium (-226 and -228) | MR | No | Yes | — | 5 pCi/L | — | Resolved | Mar 31, 2018 | Radionuclides and Revised Rad Rule |
| Jan 1, 2018 | Mar 31, 2018 | Combined Radium (-226 and -228) | MR | No | Yes | — | 5 pCi/L | — | Resolved | Mar 31, 2018 | Radionuclides and Revised Rad Rule |
| Jan 1, 1996 | Dec 31, 1996 | Nitrate | MR | No | Yes | — | 10 mg/L | — | Resolved | Dec 31, 1996 | Nitrate Rule |
| Jul 1, 1995 | Jul 31, 1995 | Coliform (TCR) | MR | No | No | — | 5% of samples | — | Resolved | Jul 31, 1995 | 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.