San Carlos High School
Arizona — Non-Transient Non-Community — PWSID: 090400701
System Information
| PWSID | 090400701 |
| System Name | San Carlos High School |
| System Type | Non-Transient Non-Community |
| Water Source | Ground Water |
| Activity Status | Active |
| Owner Type | Local |
| EPA Region | 09 |
| Serves School | Yes |
| Wholesaler | No |
| First Reported | Jun 28, 2003 |
| Last Reported | Mar 25, 2026 |
Location & Contact
| State | Arizona |
| City | San Carlos |
| ZIP Code | 85550 |
| Address | — |
| Organization | San Carlos Unified School District #20 |
| Phone | 9284752315 |
Population & Service
| Population Served | 626 |
| Service Connections | 9 |
Drinking Water Violations (229)
This water system has 229 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Nov 1, 2024 | Nov 30, 2024 | MON | No | Yes | — | — | — | Resolved | Nov 30, 2024 | — | |
| Nov 1, 2024 | — | Other | No | No | — | — | — | Resolved | Jun 30, 2025 | — | |
| Nov 1, 2024 | — | Other | No | No | — | — | — | Resolved | Jun 30, 2025 | — | |
| Nov 1, 2024 | — | Other | No | No | — | — | — | Resolved | Jun 30, 2025 | — | |
| Oct 1, 2024 | Dec 31, 2024 | MR | No | Yes | — | 4.0 mg/L | — | Resolved | Dec 31, 2024 | — | |
| Oct 1, 2024 | Dec 31, 2024 | MR | No | Yes | — | 4.0 mg/L | — | Resolved | Dec 31, 2024 | — | |
| Oct 1, 2024 | Dec 31, 2024 | MR | No | Yes | — | 4.0 mg/L | — | Resolved | Dec 31, 2024 | — | |
| Jan 1, 2024 | Dec 31, 2024 | MR | No | Yes | — | 0.080 mg/L | — | Archived | Dec 31, 2024 | — | |
| Jan 1, 2024 | Dec 31, 2024 | MR | No | Yes | — | 0.060 mg/L | — | Archived | Dec 31, 2024 | — | |
| Oct 1, 2023 | Dec 31, 2023 | MR | No | Yes | — | 4.0 mg/L | — | Resolved | Dec 31, 2023 | — | |
| Jan 1, 2023 | Jan 31, 2023 | MON | No | Yes | — | — | — | Resolved | Jan 31, 2023 | — | |
| Jan 1, 2023 | Mar 31, 2023 | MR | No | Yes | — | 4.0 mg/L | — | Resolved | Mar 31, 2023 | — | |
| Dec 1, 2022 | Dec 31, 2022 | MON | No | Yes | — | — | — | Resolved | Dec 31, 2022 | — | |
| Oct 1, 2022 | Dec 31, 2022 | MR | No | Yes | — | 4.0 mg/L | — | Resolved | Dec 31, 2022 | — | |
| Apr 1, 2022 | Jun 30, 2022 | MR | No | Yes | — | 4.0 mg/L | — | Resolved | May 26, 2022 | — | |
| Jan 1, 2022 | Dec 31, 2022 | MR | No | Yes | — | 0.060 mg/L | — | Resolved | Dec 31, 2022 | — | |
| Jan 1, 2022 | Dec 31, 2022 | MR | No | Yes | — | 10 mg/L | — | Resolved | Dec 31, 2022 | — | |
| Jan 1, 2022 | Dec 31, 2022 | MR | No | Yes | — | 0.080 mg/L | — | Resolved | Dec 31, 2022 | — | |
| Oct 1, 2021 | Dec 31, 2021 | MR | No | Yes | — | 4.0 mg/L | — | Resolved | Dec 31, 2021 | — | |
| Jan 1, 2020 | Dec 31, 2025 | MR | No | Yes | — | 0.1 mg/L | — | Archived | Dec 31, 2025 | — | |
| Jan 1, 2020 | Dec 31, 2025 | MR | No | Yes | — | 0.005 mg/L | — | Archived | Dec 31, 2025 | — | |
| Jan 1, 2020 | Dec 31, 2025 | MR | No | Yes | — | 0.7 mg/L | — | Archived | Dec 31, 2025 | — | |
| Jan 1, 2020 | Dec 31, 2025 | MR | No | Yes | — | 0.002 mg/L | — | Archived | Dec 31, 2025 | — | |
| Jan 1, 2020 | Dec 31, 2025 | MR | No | Yes | — | 0.6 mg/L | — | Archived | Dec 31, 2025 | — | |
| Jan 1, 2020 | Dec 31, 2025 | MR | No | Yes | — | 0.07 mg/L | — | Archived | Dec 31, 2025 | — | |
| Jan 1, 2020 | Dec 31, 2025 | MR | No | Yes | — | 0.007 mg/L | — | Archived | Dec 31, 2025 | — | |
| Jan 1, 2020 | Dec 31, 2022 | MR | No | Yes | — | 0.010 mg/L | — | Resolved | Dec 31, 2022 | — | |
| Jan 1, 2020 | Dec 31, 2025 | MR | No | Yes | — | 0.075 mg/L | — | Archived | Dec 31, 2025 | — | |
| Jan 1, 2020 | Dec 31, 2025 | MR | No | Yes | — | 10 mg/L | — | Archived | Dec 31, 2025 | — | |
| Jan 1, 2020 | Dec 31, 2025 | MR | No | Yes | — | 0.005 mg/L | — | Archived | Dec 31, 2025 | — | |
| Jan 1, 2020 | Dec 31, 2025 | MR | No | Yes | — | 0.1 mg/L | — | Archived | Dec 31, 2025 | — | |
| Jan 1, 2020 | Dec 31, 2025 | MR | No | Yes | — | 0.005 mg/L | — | Archived | Dec 31, 2025 | — | |
| Jan 1, 2020 | Dec 31, 2025 | MR | No | Yes | — | 0.1 mg/L | — | Archived | Dec 31, 2025 | — | |
| Jan 1, 2020 | Dec 31, 2025 | MR | No | Yes | — | 1 mg/L | — | Archived | Dec 31, 2025 | — | |
| Jan 1, 2020 | Dec 31, 2025 | MR | No | Yes | — | 0.005 mg/L | — | Archived | Dec 31, 2025 | — | |
| Jan 1, 2020 | Dec 31, 2025 | MR | No | Yes | — | 0.005 mg/L | — | Archived | Dec 31, 2025 | — | |
| Jan 1, 2020 | Dec 31, 2025 | MR | No | Yes | — | 0.005 mg/L | — | Archived | Dec 31, 2025 | — | |
| Jan 1, 2020 | Dec 31, 2025 | MR | No | Yes | — | 0.07 mg/L | — | Archived | Dec 31, 2025 | — | |
| Jan 1, 2020 | Dec 31, 2025 | MR | No | Yes | — | 0.005 mg/L | — | Archived | Dec 31, 2025 | — | |
| Jan 1, 2020 | Dec 31, 2025 | MR | No | Yes | — | 0.005 mg/L | — | Archived | Dec 31, 2025 | — | |
| Jan 1, 2020 | Dec 31, 2025 | MR | No | Yes | — | 0.2 mg/L | — | Archived | Dec 31, 2025 | — | |
| Jul 1, 2013 | Jul 31, 2013 | MCL | Yes | No | — | 5% of samples | — | Resolved | Jul 31, 2013 | — | |
| Aug 1, 2010 | Aug 31, 2010 | MR | No | No | — | 5% of samples | — | Resolved | Aug 31, 2010 | — | |
| Jul 1, 2010 | Jul 31, 2010 | MR | No | No | — | 5% of samples | — | Resolved | Jul 31, 2010 | — | |
| Jul 1, 2010 | — | MR | No | Yes | — | — | — | Resolved | Jan 25, 2011 | — | |
| Jun 1, 2010 | Jun 30, 2010 | MR | No | No | — | 5% of samples | — | Resolved | Jun 30, 2010 | — | |
| May 1, 2010 | May 31, 2010 | MR | No | No | — | 5% of samples | — | Resolved | May 31, 2010 | — | |
| Apr 1, 2010 | Apr 30, 2010 | MR | No | No | — | 5% of samples | — | Resolved | Apr 30, 2010 | — | |
| Mar 1, 2010 | Mar 31, 2010 | MR | No | No | — | 5% of samples | — | Resolved | Mar 31, 2010 | — | |
| Feb 1, 2010 | Feb 28, 2010 | MR | No | No | — | 5% of samples | — | Resolved | Feb 28, 2010 | — |
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.