RIDGEWOOD DIST IMPROV CO
Oregon - Community Water System - PWSID: OR4100229
System Information
| PWSID | OR4100229 |
| System Name | RIDGEWOOD DIST IMPROV CO |
| System Type | Community Water System |
| Water Source | Ground Water |
| Activity Status | Active |
| Owner Type | Local |
| EPA Region | 10 |
| Serves School | No |
| Wholesaler | No |
| First Reported | Mar 12, 1979 |
| Last Reported | Mar 25, 2026 |
Location & Contact
| State | Oregon |
| City | CORVALLIS |
| ZIP Code | 97330 |
| Address | 7970 NW RIDGEWOOD DR |
| Organization | RIDGEWOOD DIST IMPROV CO |
| Phone | 541-602-5552 |
Population & Service
| Population Served | 90 |
| Service Connections | 40 |
Drinking Water Violations (48)
This water system has 48 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Mar 1, 2025 | Mar 31, 2025 | MCL | Yes | No | - | - | - | Resolved | Mar 31, 2025 | - | |
| Mar 1, 2025 | Mar 31, 2025 | MCL | Yes | No | - | - | - | Resolved | Mar 31, 2025 | - | |
| Mar 1, 2025 | Mar 31, 2025 | MCL | Yes | No | - | - | - | Resolved | Mar 31, 2025 | - | |
| Jan 1, 2007 | Jan 31, 2007 | MCL | Yes | No | - | 5% of samples | - | Resolved | Jan 31, 2007 | - | |
| Jan 1, 2007 | Jan 31, 2007 | MR | No | No | - | 5% of samples | - | Resolved | Jan 31, 2007 | - | |
| Jan 1, 2007 | Jan 31, 2007 | MR | No | No | - | 5% of samples | - | Resolved | Jan 31, 2007 | - | |
| Dec 1, 2006 | Dec 31, 2006 | MCL | Yes | No | - | 5% of samples | - | Resolved | Dec 31, 2006 | - | |
| Nov 1, 2006 | Nov 30, 2006 | MCL | Yes | No | - | 5% of samples | - | Resolved | Nov 30, 2006 | - | |
| Nov 1, 2006 | Nov 30, 2006 | MR | No | No | - | 5% of samples | - | Resolved | Nov 30, 2006 | - | |
| Oct 1, 2006 | Oct 31, 2006 | MCL | Yes | No | - | 5% of samples | - | Resolved | Oct 31, 2006 | - | |
| Jan 1, 2004 | Dec 31, 2004 | MR | No | Yes | - | 10 mg/L | - | Resolved | Dec 31, 2004 | - | |
| Jan 1, 2004 | Dec 31, 2004 | MR | No | Yes | - | 10 mg/L | - | Resolved | Dec 31, 2004 | - | |
| Nov 1, 1999 | Nov 30, 1999 | MCL | Yes | No | - | 5% of samples | - | Resolved | Nov 30, 1999 | - | |
| Nov 1, 1999 | Nov 30, 1999 | MR | No | No | - | 5% of samples | - | Resolved | Nov 30, 1999 | - | |
| Nov 1, 1999 | Nov 30, 1999 | MR | No | No | - | 5% of samples | - | Resolved | Nov 30, 1999 | - | |
| Nov 1, 1999 | Nov 30, 1999 | MR | No | No | - | 5% of samples | - | Resolved | Nov 30, 1999 | - | |
| Nov 1, 1999 | Nov 30, 1999 | MR | No | No | - | 5% of samples | - | Resolved | Nov 30, 1999 | - | |
| Nov 1, 1999 | Nov 30, 1999 | MCL | Yes | No | - | 5% of samples | - | Resolved | Nov 30, 1999 | - | |
| Nov 1, 1999 | Nov 30, 1999 | MR | No | No | - | 5% of samples | - | Resolved | Nov 30, 1999 | - | |
| Oct 1, 1999 | Oct 31, 1999 | MCL | Yes | No | - | 5% of samples | - | Resolved | Oct 31, 1999 | - | |
| Oct 1, 1999 | Oct 31, 1999 | MCL | Yes | No | - | 5% of samples | - | Resolved | Oct 31, 1999 | - | |
| Jun 1, 1999 | Jun 30, 1999 | MR | No | No | - | 5% of samples | - | Resolved | Jun 30, 1999 | - | |
| Jun 1, 1999 | Jun 30, 1999 | MR | No | No | - | 5% of samples | - | Resolved | Jun 30, 1999 | - | |
| Jun 1, 1999 | Jun 30, 1999 | MR | No | No | - | 5% of samples | - | Resolved | Jun 30, 1999 | - | |
| May 1, 1999 | May 31, 1999 | MCL | Yes | No | - | 5% of samples | - | Resolved | May 31, 1999 | - | |
| May 1, 1999 | May 31, 1999 | MCL | Yes | No | - | 5% of samples | - | Resolved | May 31, 1999 | - | |
| Nov 1, 1998 | Nov 30, 1998 | MCL | Yes | No | - | 5% of samples | - | Resolved | Nov 30, 1998 | - | |
| Oct 1, 1998 | Oct 31, 1998 | MCL | Yes | No | - | 5% of samples | - | Resolved | Oct 31, 1998 | - | |
| Apr 1, 1997 | Apr 30, 1997 | MR | No | No | - | 5% of samples | - | Resolved | Apr 30, 1997 | - | |
| Apr 1, 1997 | Apr 30, 1997 | MR | No | No | - | 5% of samples | - | Resolved | Apr 30, 1997 | - | |
| Jan 1, 1996 | Dec 31, 1996 | MR | No | Yes | - | 10 mg/L | - | Resolved | Dec 31, 1996 | - | |
| Sep 1, 1995 | Sep 30, 1995 | MR | No | No | - | 5% of samples | - | Resolved | Sep 30, 1995 | - | |
| Sep 1, 1995 | Sep 30, 1995 | MR | No | No | - | 5% of samples | - | Resolved | Sep 30, 1995 | - | |
| Oct 1, 1994 | Oct 31, 1994 | MCL | Yes | No | - | 5% of samples | - | Resolved | Oct 31, 1994 | - | |
| Jun 1, 1994 | Jun 30, 1994 | MR | No | No | - | 5% of samples | - | Resolved | Jun 30, 1994 | - | |
| Jun 1, 1994 | Jun 30, 1994 | MR | No | No | - | 5% of samples | - | Resolved | Jun 30, 1994 | - | |
| Sep 1, 1993 | Sep 30, 1993 | MR | No | No | - | 5% of samples | - | Resolved | Sep 30, 1993 | - | |
| Sep 1, 1993 | Sep 30, 1993 | MR | No | No | - | 5% of samples | - | Resolved | Sep 30, 1993 | - | |
| Feb 1, 1993 | Feb 28, 1993 | MR | No | No | - | 5% of samples | - | Resolved | Feb 28, 1993 | - | |
| Feb 1, 1993 | Feb 28, 1993 | MR | No | No | - | 5% of samples | - | Resolved | Feb 28, 1993 | - | |
| Feb 1, 1993 | Feb 28, 1993 | MR | No | No | - | 5% of samples | - | Resolved | Feb 28, 1993 | - | |
| Jan 1, 1993 | Jan 31, 1993 | MCL | Yes | No | - | 5% of samples | - | Archived | Jan 31, 1993 | - | |
| Jun 1, 1976 | May 31, 1980 | MR | No | No | - | 15 pCi/L | - | Archived | May 31, 1980 | - | |
| Jun 1, 1976 | May 31, 1980 | MR | No | No | - | 5 pCi/L | - | Archived | May 31, 1980 | - | |
| - | - | - | No | No | - | - | - | - | - | - | |
| - | - | - | 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.