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 | Mar 26, 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 (16)
This water system has 16 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 | MR | No | Yes | — | 5 pCi/L | — | Resolved | Mar 31, 2018 | — | |
| Jan 1, 2018 | Mar 31, 2018 | MR | No | Yes | — | 5 pCi/L | — | Resolved | Mar 31, 2018 | — | |
| Jan 1, 2018 | Mar 31, 2018 | MR | No | Yes | — | 5 pCi/L | — | Resolved | Mar 31, 2018 | — | |
| Jan 1, 1996 | Dec 31, 1996 | MR | No | Yes | — | 10 mg/L | — | Resolved | Dec 31, 1996 | — | |
| Jul 1, 1995 | Jul 31, 1995 | MR | No | No | — | 5% of samples | — | Resolved | Jul 31, 1995 | — | |
| Jun 24, 1981 | Jul 23, 1981 | MR | No | Yes | — | 0.1 mg/L | — | Archived | Jul 23, 1981 | — | |
| Jun 24, 1981 | Jul 23, 1981 | MR | No | Yes | — | 4.0 mg/L | — | Archived | Jul 23, 1981 | — | |
| Jun 24, 1981 | Jul 23, 1981 | MR | No | Yes | — | 0.002 mg/L | — | Archived | Jul 23, 1981 | — | |
| Jun 24, 1981 | Jul 23, 1981 | MR | No | Yes | — | 10 mg/L | — | Archived | Jul 23, 1981 | — | |
| Jun 24, 1981 | Jul 23, 1981 | MR | No | Yes | — | 2 mg/L | — | Archived | Jul 23, 1981 | — | |
| Jun 24, 1981 | Jul 23, 1981 | MR | No | Yes | — | 0.010 mg/L | — | Archived | Jul 23, 1981 | — | |
| Jun 24, 1981 | Jul 23, 1981 | MR | No | Yes | — | 0.005 mg/L | — | Archived | Jul 23, 1981 | — | |
| Jun 24, 1981 | Jul 23, 1981 | MR | No | Yes | — | 0.05 mg/L | — | Archived | Jul 23, 1981 | — | |
| — | — | — | 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.