SOUTHWESTERN RESEARCH STATION
Arizona - Non-Transient Non-Community - PWSID: AZ0402357
System Information
| PWSID | AZ0402357 |
| System Name | SOUTHWESTERN RESEARCH STATION |
| System Type | Non-Transient Non-Community |
| Water Source | Ground Water |
| Activity Status | Active |
| Owner Type | Local |
| EPA Region | 09 |
| Serves School | No |
| Wholesaler | No |
| First Reported | Oct 5, 1979 |
| Last Reported | Mar 12, 2026 |
Location & Contact
| State | Arizona |
| City | PORTAL |
| ZIP Code | 85632 |
| Address | ATTN: GEOFF BENDER |
| Organization | SOUTHWESTERN RESEARCH STATION |
| Phone | 520-558-2396 |
Population & Service
| Population Served | 40 |
| Service Connections | 14 |
Drinking Water Violations (253)
This water system has 253 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Sep 12, 2025 | - | Other | No | No | - | - | - | Resolved | Oct 15, 2025 | - | |
| Sep 12, 2025 | - | Other | No | No | - | - | - | Resolved | Oct 15, 2025 | - | |
| Jun 24, 2025 | - | TT | Yes | No | - | - | - | Resolved | May 29, 2025 | - | |
| Jun 24, 2025 | - | TT | Yes | No | - | - | - | Resolved | May 29, 2025 | - | |
| Jun 24, 2025 | - | TT | Yes | No | - | - | - | Resolved | May 29, 2025 | - | |
| Jun 24, 2025 | - | TT | Yes | No | - | - | - | Resolved | May 29, 2025 | - | |
| May 26, 2025 | - | TT | Yes | No | - | - | - | Resolved | May 29, 2025 | - | |
| May 26, 2025 | - | TT | Yes | No | - | - | - | Resolved | May 29, 2025 | - | |
| May 26, 2025 | - | TT | Yes | No | - | - | - | Resolved | May 29, 2025 | - | |
| May 26, 2025 | - | TT | Yes | No | - | - | - | Resolved | May 29, 2025 | - | |
| Aug 9, 2024 | - | MR | No | Yes | - | - | - | Resolved | Aug 16, 2024 | - | |
| Aug 9, 2024 | - | MR | No | Yes | - | - | - | Resolved | Aug 16, 2024 | - | |
| Aug 9, 2024 | - | MR | No | Yes | - | - | - | Resolved | Aug 16, 2024 | - | |
| Aug 1, 2024 | - | RPT | No | No | - | - | - | Resolved | Sep 11, 2024 | - | |
| Aug 1, 2024 | - | RPT | No | No | - | - | - | Resolved | Sep 11, 2024 | - | |
| Apr 1, 2024 | - | TT | Yes | No | - | - | - | Resolved | May 15, 2024 | - | |
| Apr 1, 2024 | - | RPT | No | No | - | - | - | Resolved | May 15, 2024 | - | |
| Apr 1, 2024 | - | TT | Yes | No | - | - | - | Resolved | May 15, 2024 | - | |
| Apr 1, 2024 | - | RPT | No | No | - | - | - | Resolved | May 15, 2024 | - | |
| Apr 1, 2022 | - | TT | Yes | No | - | - | - | Resolved | Dec 28, 2022 | - | |
| Apr 1, 2022 | - | RPT | No | No | - | - | - | Resolved | May 31, 2022 | - | |
| Apr 1, 2022 | - | RPT | No | No | - | - | - | Resolved | May 31, 2022 | - | |
| Apr 1, 2022 | - | TT | Yes | No | - | - | - | Resolved | Dec 28, 2022 | - | |
| Oct 1, 2020 | - | MR | No | No | - | TT | - | Resolved | Oct 26, 2020 | - | |
| Jan 1, 2020 | - | MR | No | No | - | TT | - | Resolved | Oct 20, 2020 | - | |
| Jan 1, 2020 | - | MR | No | No | - | TT | - | Resolved | Oct 20, 2020 | - | |
| Apr 1, 2019 | - | TT | Yes | No | - | TT | - | Resolved | Apr 12, 2019 | - | |
| Apr 1, 2019 | - | TT | Yes | No | - | TT | - | Resolved | Apr 12, 2019 | - | |
| Apr 1, 2019 | - | TT | Yes | No | - | TT | - | Resolved | Apr 12, 2019 | - | |
| Oct 1, 2018 | Oct 31, 2018 | MR | No | Yes | - | - | - | Resolved | Oct 31, 2018 | - | |
| Oct 1, 2018 | - | MR | No | No | - | TT | - | Resolved | Oct 11, 2018 | - | |
| Oct 1, 2018 | Oct 31, 2018 | MR | No | Yes | - | - | - | Resolved | Oct 31, 2018 | - | |
| Oct 1, 2018 | Oct 31, 2018 | MON | No | Yes | - | - | - | Resolved | Oct 31, 2018 | - | |
| Oct 1, 2018 | Oct 31, 2018 | MR | No | Yes | - | - | - | Resolved | Oct 31, 2018 | - | |
| Oct 1, 2018 | Oct 31, 2018 | MON | No | Yes | - | - | - | Resolved | Oct 31, 2018 | - | |
| Oct 1, 2018 | - | MR | No | No | - | TT | - | Resolved | Oct 11, 2018 | - | |
| Sep 1, 2018 | Sep 30, 2018 | MR | No | Yes | - | - | - | Resolved | Sep 30, 2018 | - | |
| Sep 1, 2018 | Sep 30, 2018 | MR | No | Yes | - | - | - | Resolved | Sep 30, 2018 | - | |
| Sep 1, 2018 | Sep 30, 2018 | MR | No | Yes | - | - | - | Resolved | Sep 30, 2018 | - | |
| Sep 1, 2018 | Sep 30, 2018 | MR | No | Yes | - | - | - | Resolved | Sep 30, 2018 | - | |
| Aug 1, 2018 | Aug 31, 2018 | MR | No | Yes | - | - | - | Resolved | Aug 31, 2018 | - | |
| Aug 1, 2018 | Aug 31, 2018 | MR | No | Yes | - | - | - | Resolved | Aug 31, 2018 | - | |
| May 1, 2018 | May 31, 2018 | MR | No | Yes | - | - | - | Resolved | May 31, 2018 | - | |
| May 1, 2018 | May 31, 2018 | MR | No | Yes | - | - | - | Resolved | May 31, 2018 | - | |
| Oct 1, 2017 | Sep 30, 2018 | MR | No | Yes | - | 0.060 mg/L | - | Resolved | Sep 30, 2018 | - | |
| Oct 1, 2017 | Sep 30, 2018 | MR | No | Yes | - | 0.060 mg/L | - | Resolved | Sep 30, 2018 | - | |
| Oct 1, 2017 | Sep 30, 2018 | MR | No | Yes | - | 0.080 mg/L | - | Resolved | Sep 30, 2018 | - | |
| Oct 1, 2017 | Sep 30, 2018 | MR | No | Yes | - | 0.080 mg/L | - | Resolved | Sep 30, 2018 | - | |
| Aug 1, 2017 | Aug 31, 2017 | MR | No | Yes | - | - | - | Resolved | Aug 31, 2017 | - | |
| Aug 1, 2017 | Aug 31, 2017 | MR | No | Yes | - | - | - | Resolved | Aug 31, 2017 | - |
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.