PONDEROSA UTILITY CORP
Arizona — Community Water System — PWSID: AZ0403018
System Information
| PWSID | AZ0403018 |
| System Name | PONDEROSA UTILITY CORP |
| System Type | Community Water System |
| Water Source | Ground Water |
| Activity Status | Active |
| Owner Type | Private |
| EPA Region | 09 |
| Serves School | No |
| Wholesaler | No |
| First Reported | Oct 5, 1979 |
| Last Reported | Nov 17, 2025 |
Location & Contact
| State | Arizona |
| City | FLAGSTAFF |
| ZIP Code | 86005 |
| Address | 949 OSAGE |
| Organization | ASHLEY, AMY LYNN |
| Phone | 928-525-6210 |
Population & Service
| Population Served | 1,585 |
| Service Connections | 691 |
Drinking Water Violations (105)
This water system has 105 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 31, 2024 | — | Groundwater Rule | TT | Yes | No | — | — | — | Resolved | Sep 26, 2024 | Ground Water Rule |
| Jul 31, 2024 | — | Groundwater Rule | TT | Yes | No | — | — | — | Resolved | Sep 26, 2024 | Ground Water Rule |
| Jul 31, 2024 | — | Groundwater Rule | TT | Yes | No | — | — | — | Resolved | Sep 26, 2024 | Ground Water Rule |
| Jul 31, 2024 | — | Groundwater Rule | TT | Yes | No | — | — | — | Resolved | Sep 26, 2024 | Ground Water Rule |
| Jul 31, 2024 | — | Groundwater Rule | TT | Yes | No | — | — | — | Resolved | Sep 26, 2024 | Ground Water Rule |
| Jul 31, 2024 | — | Groundwater Rule | TT | Yes | No | — | — | — | Resolved | Sep 26, 2024 | Ground Water Rule |
| May 17, 2024 | — | Groundwater Rule | TT | Yes | No | — | — | — | Resolved | May 22, 2024 | Ground Water Rule |
| May 17, 2024 | — | Groundwater Rule | TT | Yes | No | — | — | — | Resolved | May 22, 2024 | Ground Water Rule |
| May 17, 2024 | — | Groundwater Rule | TT | Yes | No | — | — | — | Resolved | May 22, 2024 | Ground Water Rule |
| May 17, 2024 | — | Groundwater Rule | TT | Yes | No | — | — | — | Resolved | May 22, 2024 | Ground Water Rule |
| Oct 9, 2023 | — | Revised Total Coliform Rule | TT | Yes | No | — | — | — | Resolved | Apr 17, 2024 | Revised Total Coliform Rule |
| Oct 9, 2023 | — | Revised Total Coliform Rule | TT | Yes | No | — | — | — | Resolved | Apr 17, 2024 | Revised Total Coliform Rule |
| Jan 1, 2023 | — | Lead and Copper Rule | MR | No | No | — | TT | — | Resolved | Apr 26, 2024 | Lead and Copper Rule |
| Jan 1, 2023 | — | Lead and Copper Rule | MR | No | No | — | TT | — | Resolved | Apr 26, 2024 | Lead and Copper Rule |
| Jul 1, 2016 | — | Consumer Confidence Rule | Other | No | No | — | — | — | Resolved | Aug 3, 2016 | Consumer Confidence Rule |
| Jul 1, 2015 | Jul 31, 2015 | Coliform (TCR) | MCL | Yes | No | — | 5% of samples | — | Resolved | Jul 31, 2015 | Total Coliform Rule |
| Jul 1, 2015 | Jul 31, 2015 | Coliform (TCR) | MCL | Yes | No | — | 5% of samples | — | Resolved | Jul 31, 2015 | Total Coliform Rule |
| Apr 1, 2013 | Apr 30, 2013 | Coliform (TCR) | MR | No | No | — | 5% of samples | — | Resolved | Apr 30, 2013 | Total Coliform Rule |
| Apr 1, 2013 | Apr 30, 2013 | Coliform (TCR) | MR | No | No | — | 5% of samples | — | Resolved | Apr 30, 2013 | Total Coliform Rule |
| Mar 1, 2013 | Mar 31, 2013 | Coliform (TCR) | MR | No | No | — | 5% of samples | — | Resolved | Mar 31, 2013 | Total Coliform Rule |
| Mar 1, 2013 | Mar 31, 2013 | Coliform (TCR) | MR | No | No | — | 5% of samples | — | Resolved | Mar 31, 2013 | Total Coliform Rule |
| Aug 1, 2012 | Aug 31, 2012 | Coliform (TCR) | MR | No | No | — | 5% of samples | — | Resolved | Aug 31, 2012 | Total Coliform Rule |
| Aug 1, 2012 | Aug 31, 2012 | Coliform (TCR) | MR | No | No | — | 5% of samples | — | Resolved | Aug 31, 2012 | Total Coliform Rule |
| Jul 1, 2012 | Jul 31, 2012 | Coliform (TCR) | MCL | Yes | No | — | 5% of samples | — | Resolved | Jul 31, 2012 | Total Coliform Rule |
| Jul 1, 2012 | Jul 31, 2012 | Coliform (TCR) | MCL | Yes | No | — | 5% of samples | — | Resolved | Jul 31, 2012 | Total Coliform Rule |
| Dec 1, 2011 | Dec 31, 2011 | Coliform (TCR) | MR | No | No | — | 5% of samples | — | Resolved | Dec 31, 2011 | Total Coliform Rule |
| Dec 1, 2011 | Dec 31, 2011 | Coliform (TCR) | MR | No | No | — | 5% of samples | — | Resolved | Dec 31, 2011 | Total Coliform Rule |
| Nov 1, 2011 | — | E. COLI | MR | No | Yes | — | — | — | Resolved | Jul 9, 2012 | Ground Water Rule |
| Nov 1, 2011 | Nov 30, 2011 | Coliform (TCR) | MR | No | No | — | 5% of samples | — | Resolved | Nov 30, 2011 | Total Coliform Rule |
| Nov 1, 2011 | Nov 30, 2011 | Coliform (TCR) | MR | No | No | — | 5% of samples | — | Resolved | Nov 30, 2011 | Total Coliform Rule |
| Nov 1, 2011 | Nov 30, 2011 | Coliform (TCR) | MR | No | No | — | 5% of samples | — | Resolved | Nov 30, 2011 | Total Coliform Rule |
| Nov 1, 2011 | Nov 30, 2011 | Coliform (TCR) | MR | No | No | — | 5% of samples | — | Resolved | Nov 30, 2011 | Total Coliform Rule |
| Oct 1, 2011 | Oct 31, 2011 | Coliform (TCR) | MCL | Yes | No | — | 5% of samples | — | Resolved | Oct 31, 2011 | Total Coliform Rule |
| Oct 1, 2011 | Oct 31, 2011 | Coliform (TCR) | MCL | Yes | No | — | 5% of samples | — | Resolved | Oct 31, 2011 | Total Coliform Rule |
| Sep 1, 2011 | Sep 30, 2011 | Coliform (TCR) | MCL | Yes | No | — | 5% of samples | — | Resolved | Sep 30, 2011 | Total Coliform Rule |
| Sep 1, 2011 | Sep 30, 2011 | Coliform (TCR) | MCL | Yes | No | — | 5% of samples | — | Resolved | Sep 30, 2011 | Total Coliform Rule |
| Oct 6, 2010 | — | E. COLI | MR | No | Yes | — | — | — | Resolved | Oct 27, 2010 | Ground Water Rule |
| Oct 1, 2010 | — | Consumer Confidence Rule | Other | No | No | — | — | — | Resolved | Jun 28, 2011 | Consumer Confidence Rule |
| Sep 1, 2010 | Sep 30, 2010 | Coliform (TCR) | MR | No | No | — | 5% of samples | — | Resolved | Sep 30, 2010 | Total Coliform Rule |
| Sep 1, 2010 | Sep 30, 2010 | Coliform (TCR) | MR | No | No | — | 5% of samples | — | Resolved | Sep 30, 2010 | Total Coliform Rule |
| Sep 1, 2010 | Sep 30, 2010 | Coliform (TCR) | MCL | Yes | No | — | 5% of samples | — | Resolved | Sep 30, 2010 | Total Coliform Rule |
| Sep 1, 2010 | Sep 30, 2010 | Coliform (TCR) | MCL | Yes | No | — | 5% of samples | — | Resolved | Sep 30, 2010 | Total Coliform Rule |
| Jul 1, 2010 | — | Consumer Confidence Rule | Other | No | No | — | — | — | Resolved | Jul 20, 2010 | Consumer Confidence Rule |
| Jul 1, 2010 | Jul 31, 2010 | Coliform (TCR) | MR | No | No | — | 5% of samples | — | Resolved | Jul 31, 2010 | Total Coliform Rule |
| Jul 1, 2010 | Jul 31, 2010 | Coliform (TCR) | MR | No | No | — | 5% of samples | — | Resolved | Jul 31, 2010 | Total Coliform Rule |
| Jun 1, 2010 | Jun 30, 2010 | Coliform (TCR) | MR | No | No | — | 5% of samples | — | Resolved | Jun 30, 2010 | Total Coliform Rule |
| Jun 1, 2010 | Jun 30, 2010 | Coliform (TCR) | MR | No | No | — | 5% of samples | — | Resolved | Jun 30, 2010 | Total Coliform Rule |
| Jun 1, 2010 | Jun 30, 2010 | Coliform (TCR) | MR | No | No | — | 5% of samples | — | Resolved | Jun 30, 2010 | Total Coliform Rule |
| May 26, 2010 | — | E. COLI | MR | No | Yes | — | — | — | Resolved | Oct 27, 2010 | Ground Water Rule |
| May 1, 2010 | May 31, 2010 | Coliform (TCR) | MR | No | No | — | 5% of samples | — | Resolved | May 31, 2010 | 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.