OCHOCO WEST WTR & SAN AUTHORITY
Oregon — Community Water System — PWSID: OR4100681
System Information
| PWSID | OR4100681 |
| System Name | OCHOCO WEST WTR & SAN AUTHORITY |
| System Type | Community Water System |
| Water Source | Ground Water |
| Activity Status | Active |
| Owner Type | Private |
| EPA Region | 10 |
| Serves School | No |
| Wholesaler | No |
| First Reported | Mar 12, 1979 |
| Last Reported | Dec 23, 2025 |
Location & Contact
| State | Oregon |
| City | PRINEVILLE |
| ZIP Code | 97754 |
| Address | 5488 NW PRINE RD |
| Organization | OCHOCO WEST WTR & SAN AUTHORITY |
| Phone | 541-447-1934 |
Population & Service
| Population Served | 400 |
| Service Connections | 242 |
Drinking Water Violations (24)
This water system has 24 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, 2025 | — | Consumer Confidence Rule | Other | No | No | — | — | — | Resolved | Sep 4, 2025 | Consumer Confidence Rule |
| Jan 1, 2023 | Dec 31, 2023 | Nitrate | MR | No | Yes | — | 10 mg/L | — | Resolved | Dec 31, 2023 | Nitrate Rule |
| Oct 1, 2022 | Dec 31, 2022 | Arsenic | MR | No | Yes | — | 0.010 mg/L | — | Resolved | Dec 31, 2022 | Arsenic Rule |
| Oct 1, 2021 | Dec 31, 2021 | Arsenic | MR | No | Yes | — | 0.010 mg/L | — | Resolved | Dec 31, 2021 | Arsenic Rule |
| Jan 1, 2019 | Sep 30, 2021 | Total Haloacetic Acids (HAA5) | MR | No | Yes | — | 0.060 mg/L | — | Resolved | Sep 30, 2021 | Stage 2 Disinfectants and Disinfection Byproducts Rule |
| Jan 1, 2019 | Sep 30, 2021 | TTHM | MR | No | Yes | — | 0.080 mg/L | — | Resolved | Sep 30, 2021 | Stage 2 Disinfectants and Disinfection Byproducts Rule |
| Jul 1, 2012 | Sep 30, 2012 | Arsenic | MR | No | Yes | — | 0.010 mg/L | — | Resolved | Sep 30, 2012 | Arsenic Rule |
| Jul 1, 2012 | Sep 30, 2012 | Arsenic | MR | No | Yes | — | 0.010 mg/L | — | Resolved | Sep 30, 2012 | Arsenic Rule |
| Jan 1, 2010 | Mar 31, 2010 | Arsenic | MR | No | Yes | — | 0.010 mg/L | — | Resolved | Sep 23, 2009 | Arsenic Rule |
| Jan 1, 2010 | Mar 31, 2010 | Arsenic | MR | No | Yes | — | 0.010 mg/L | — | Resolved | Sep 23, 2009 | Arsenic Rule |
| Sep 1, 2005 | Sep 30, 2005 | Coliform (TCR) | MR | No | No | — | 5% of samples | — | Resolved | Sep 30, 2005 | Total Coliform Rule |
| Oct 19, 2004 | — | Consumer Confidence Rule | Other | No | No | — | — | — | Resolved | Nov 21, 2006 | Consumer Confidence Rule |
| Jul 1, 2004 | — | Consumer Confidence Rule | Other | No | No | — | — | — | Resolved | Nov 21, 2006 | Consumer Confidence Rule |
| Oct 19, 2003 | — | Consumer Confidence Rule | Other | No | No | — | — | — | Resolved | Nov 21, 2006 | Consumer Confidence Rule |
| Jul 1, 2003 | — | Consumer Confidence Rule | Other | No | No | — | — | — | Resolved | Nov 21, 2006 | Consumer Confidence Rule |
| Jan 1, 2002 | Dec 31, 2004 | Arsenic | MCL | Yes | No | .06 MG/L | 0.010 mg/L | .05 | Resolved | Dec 31, 2004 | Arsenic Rule |
| Nov 1, 1999 | Nov 30, 1999 | Coliform (TCR) | MR | No | No | — | 5% of samples | — | Resolved | Nov 30, 1999 | Total Coliform Rule |
| Jan 1, 1997 | Dec 31, 1997 | Nitrate | MR | No | Yes | — | 10 mg/L | — | Resolved | Dec 31, 1997 | Nitrate Rule |
| Nov 1, 1994 | Nov 30, 1994 | Coliform (TCR) | MR | No | No | — | 5% of samples | — | Resolved | Nov 30, 1994 | Total Coliform Rule |
| Nov 1, 1991 | Nov 30, 1991 | Coliform (TCR) | MR | No | Yes | — | 5% of samples | — | Archived | Nov 30, 1991 | Total Coliform Rule |
| Nov 1, 1991 | Nov 30, 1991 | Coliform (TCR) | MR | No | No | — | 5% of samples | — | Resolved | Nov 30, 1991 | Total Coliform Rule |
| Aug 1, 1991 | Aug 31, 1991 | Coliform (TCR) | MR | No | No | — | 5% of samples | — | Resolved | Aug 31, 1991 | Total Coliform Rule |
| Jun 1, 1976 | May 31, 1980 | Gross Alpha, Excl. Radon and U | MR | No | No | — | 15 pCi/L | — | Archived | May 31, 1980 | Radionuclides and Revised Rad Rule |
| Jun 1, 1976 | May 31, 1980 | Combined Radium (-226 and -228) | MR | No | No | — | 5 pCi/L | — | Archived | May 31, 1980 | Radionuclides and Revised Rad 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.