SIERRITA MOUNTAIN WATER COOP
Arizona — Community Water System — PWSID: AZ0410208
System Information
| PWSID | AZ0410208 |
| System Name | SIERRITA MOUNTAIN WATER COOP |
| 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 | Sep 27, 1990 |
| Last Reported | Nov 17, 2025 |
Location & Contact
| State | Arizona |
| City | TUCSON |
| ZIP Code | 86754 |
| Address | PO BOX 85160 |
| Organization | SIERRA MT WATER CO-OP |
| Phone | 520-624-1460 |
Population & Service
| Population Served | 258 |
| Service Connections | 67 |
Drinking Water Violations (206)
This water system has 206 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| May 1, 2025 | May 31, 2025 | Chlorine | MR | No | Yes | — | 4.0 mg/L | — | Archived | May 31, 2025 | Stage 1 Disinfectants and Disinfection Byproducts Rule |
| Jul 1, 2023 | — | Consumer Confidence Rule | Other | No | No | — | — | — | Resolved | Oct 6, 2023 | Consumer Confidence Rule |
| Jul 1, 2023 | — | Consumer Confidence Rule | Other | No | No | — | — | — | Resolved | Oct 6, 2023 | Consumer Confidence Rule |
| Jan 1, 2023 | — | Lead and Copper Rule | MR | No | No | — | TT | — | Resolved | Feb 15, 2023 | Lead and Copper Rule |
| Jan 1, 2023 | — | Lead and Copper Rule | MR | No | No | — | TT | — | Resolved | Feb 15, 2023 | Lead and Copper Rule |
| Apr 1, 2022 | Jun 30, 2022 | Chlorine | MR | No | Yes | — | 4.0 mg/L | — | Resolved | Jun 30, 2022 | Stage 1 Disinfectants and Disinfection Byproducts Rule |
| Apr 1, 2022 | Jun 30, 2022 | Chlorine | MR | No | Yes | — | 4.0 mg/L | — | Resolved | Jun 30, 2022 | Stage 1 Disinfectants and Disinfection Byproducts Rule |
| Oct 1, 2019 | — | Lead and Copper Rule | MR | No | No | — | TT | — | Resolved | Oct 25, 2019 | Lead and Copper Rule |
| Oct 1, 2019 | — | Lead and Copper Rule | MR | No | No | — | TT | — | Resolved | Oct 25, 2019 | Lead and Copper Rule |
| Oct 1, 2016 | — | Consumer Confidence Rule | Other | No | No | — | — | — | Resolved | Mar 15, 2017 | Consumer Confidence Rule |
| Oct 1, 2016 | — | Consumer Confidence Rule | Other | No | No | — | — | — | Resolved | Mar 15, 2017 | Consumer Confidence Rule |
| Jul 1, 2016 | — | Consumer Confidence Rule | Other | No | No | — | — | — | Resolved | Mar 15, 2017 | Consumer Confidence Rule |
| Jul 1, 2016 | — | Consumer Confidence Rule | Other | No | No | — | — | — | Resolved | Mar 15, 2017 | Consumer Confidence Rule |
| Oct 1, 2015 | Dec 31, 2015 | Chlorine | MR | No | Yes | — | 4.0 mg/L | — | Resolved | Dec 31, 2015 | Stage 1 Disinfectants and Disinfection Byproducts Rule |
| Oct 1, 2009 | Dec 31, 2009 | Chlorine | MR | No | Yes | — | 4.0 mg/L | — | Resolved | Dec 31, 2009 | Stage 1 Disinfectants and Disinfection Byproducts Rule |
| Oct 1, 2009 | Dec 31, 2009 | Chlorine | MR | No | Yes | — | 4.0 mg/L | — | Resolved | Dec 31, 2009 | Stage 1 Disinfectants and Disinfection Byproducts Rule |
| Jul 1, 2009 | Sep 30, 2009 | Chlorine | MR | No | Yes | — | 4.0 mg/L | — | Resolved | Sep 30, 2009 | Stage 1 Disinfectants and Disinfection Byproducts Rule |
| Apr 1, 2009 | Jun 30, 2009 | Chlorine | MR | No | Yes | — | 4.0 mg/L | — | Resolved | Jun 30, 2009 | Stage 1 Disinfectants and Disinfection Byproducts Rule |
| Apr 1, 2009 | Jun 30, 2009 | Chlorine | MR | No | Yes | — | 4.0 mg/L | — | Resolved | Jun 30, 2009 | Stage 1 Disinfectants and Disinfection Byproducts Rule |
| Oct 1, 2008 | Dec 31, 2008 | Chlorine | MR | No | Yes | — | 4.0 mg/L | — | Resolved | Dec 31, 2008 | Stage 1 Disinfectants and Disinfection Byproducts Rule |
| Sep 1, 2008 | Sep 30, 2008 | Coliform (TCR) | MR | No | No | — | 5% of samples | — | Resolved | Sep 30, 2008 | Total Coliform Rule |
| Sep 1, 2008 | Sep 30, 2008 | Coliform (TCR) | MR | No | No | — | 5% of samples | — | Resolved | Sep 30, 2008 | Total Coliform Rule |
| Sep 1, 2008 | Sep 30, 2008 | Coliform (TCR) | MCL | Yes | No | — | 5% of samples | — | Resolved | Sep 30, 2008 | Total Coliform Rule |
| Jul 1, 2008 | Jul 31, 2008 | Coliform (TCR) | MR | No | No | — | 5% of samples | — | Resolved | Jul 31, 2008 | Total Coliform Rule |
| Jul 1, 2008 | Sep 30, 2008 | Chlorine | MR | No | Yes | — | 4.0 mg/L | — | Resolved | Sep 30, 2008 | Stage 1 Disinfectants and Disinfection Byproducts Rule |
| Jul 1, 2008 | Jul 31, 2008 | Coliform (TCR) | MR | No | No | — | 5% of samples | — | Resolved | Jul 31, 2008 | Total Coliform Rule |
| Jul 1, 2008 | Sep 30, 2008 | Chlorine | MR | No | Yes | — | 4.0 mg/L | — | Resolved | Sep 30, 2008 | Stage 1 Disinfectants and Disinfection Byproducts Rule |
| Apr 1, 2008 | Jun 30, 2008 | Chlorine | MR | No | Yes | — | 4.0 mg/L | — | Resolved | Jun 30, 2008 | Stage 1 Disinfectants and Disinfection Byproducts Rule |
| Jan 1, 2008 | Mar 31, 2008 | Chlorine | MR | No | Yes | — | 4.0 mg/L | — | Resolved | Mar 31, 2008 | Stage 1 Disinfectants and Disinfection Byproducts Rule |
| Jan 1, 2008 | Mar 31, 2008 | Chlorine | MR | No | Yes | — | 4.0 mg/L | — | Resolved | Mar 31, 2008 | Stage 1 Disinfectants and Disinfection Byproducts Rule |
| Jan 1, 2008 | Dec 31, 2008 | Total Haloacetic Acids (HAA5) | MR | No | Yes | — | 0.060 mg/L | — | Resolved | Dec 31, 2008 | Stage 1 Disinfectants and Disinfection Byproducts Rule |
| Jan 1, 2008 | Dec 31, 2008 | TTHM | MR | No | Yes | — | 0.080 mg/L | — | Resolved | Dec 31, 2008 | Stage 1 Disinfectants and Disinfection Byproducts Rule |
| Jan 1, 2008 | Dec 31, 2008 | Total Haloacetic Acids (HAA5) | MR | No | Yes | — | 0.060 mg/L | — | Resolved | Dec 31, 2008 | Stage 1 Disinfectants and Disinfection Byproducts Rule |
| Jan 1, 2008 | Dec 31, 2008 | TTHM | MR | No | Yes | — | 0.080 mg/L | — | Resolved | Dec 31, 2008 | Stage 1 Disinfectants and Disinfection Byproducts Rule |
| Jan 1, 2007 | Mar 31, 2007 | Chlorine | MR | No | Yes | — | 4.0 mg/L | — | Resolved | Mar 31, 2007 | Stage 1 Disinfectants and Disinfection Byproducts Rule |
| Jan 1, 2007 | Mar 31, 2007 | Chlorine | MR | No | Yes | — | 4.0 mg/L | — | Resolved | Mar 31, 2007 | Stage 1 Disinfectants and Disinfection Byproducts Rule |
| Oct 1, 2006 | — | Lead and Copper Rule | MR | No | No | — | TT | — | Resolved | Dec 31, 2007 | Lead and Copper Rule |
| Jul 1, 2005 | — | Consumer Confidence Rule | Other | No | No | — | — | — | Resolved | May 25, 2006 | Consumer Confidence Rule |
| Jul 1, 2004 | — | Lead and Copper Rule | MR | No | No | — | TT | — | Resolved | Jul 28, 2008 | Lead and Copper Rule |
| Sep 1, 2003 | Sep 30, 2003 | Coliform (TCR) | MR | No | No | — | 5% of samples | — | Resolved | Sep 30, 2003 | Total Coliform Rule |
| Aug 1, 2003 | Aug 31, 2003 | Coliform (TCR) | MR | No | No | — | 5% of samples | — | Resolved | Aug 31, 2003 | Total Coliform Rule |
| Jul 1, 2003 | Jul 31, 2003 | Coliform (TCR) | MR | No | No | — | 5% of samples | — | Resolved | Jul 31, 2003 | Total Coliform Rule |
| Jul 1, 2003 | — | Consumer Confidence Rule | Other | No | No | — | — | — | Resolved | Jul 1, 2004 | Consumer Confidence Rule |
| Jul 1, 2003 | Jul 31, 2003 | Coliform (TCR) | MR | No | No | — | 5% of samples | — | Resolved | Jul 31, 2003 | Total Coliform Rule |
| Feb 1, 2003 | Feb 28, 2003 | Coliform (TCR) | MR | No | No | — | 5% of samples | — | Resolved | Feb 28, 2003 | Total Coliform Rule |
| Feb 1, 2003 | Feb 28, 2003 | Coliform (TCR) | MR | No | No | — | 5% of samples | — | Resolved | Feb 28, 2003 | Total Coliform Rule |
| Nov 1, 2002 | Nov 30, 2002 | Coliform (TCR) | MR | No | No | — | 5% of samples | — | Resolved | Nov 30, 2002 | Total Coliform Rule |
| Nov 1, 2002 | Nov 30, 2002 | Coliform (TCR) | MR | No | No | — | 5% of samples | — | Resolved | Nov 30, 2002 | Total Coliform Rule |
| Oct 1, 2002 | Oct 31, 2002 | Coliform (TCR) | MR | No | No | — | 5% of samples | — | Resolved | Oct 31, 2002 | Total Coliform Rule |
| Oct 1, 2002 | Oct 31, 2002 | Coliform (TCR) | MR | No | No | — | 5% of samples | — | Resolved | Oct 31, 2002 | 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.