CALVIN
Oklahoma - Community Water System - PWSID: OK2003201
System Information
| PWSID | OK2003201 |
| System Name | CALVIN |
| System Type | Community Water System |
| Water Source | Ground Water |
| Activity Status | Active |
| Owner Type | Local |
| EPA Region | 06 |
| Serves School | No |
| Wholesaler | No |
| First Reported | Mar 11, 1980 |
| Last Reported | Feb 18, 2026 |
Location & Contact
| State | Oklahoma |
| City | CALVIN |
| ZIP Code | 74531 |
| Address | Mike Troupe, Chairman |
| Organization | CALVIN |
| Phone | 405-645-2434 |
Population & Service
| Population Served | 300 |
| Service Connections | 138 |
Drinking Water Violations (230)
This water system has 230 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 | - | Other | No | No | - | - | - | Resolved | May 17, 2025 | - | |
| Oct 2, 2023 | - | Other | No | No | - | - | - | Resolved | Jul 2, 2024 | - | |
| Oct 2, 2023 | - | Other | No | No | - | - | - | Resolved | Jul 2, 2024 | - | |
| Apr 1, 2021 | Jun 30, 2021 | MR | No | Yes | - | 30 ug/L | - | Resolved | Jun 30, 2021 | - | |
| Apr 1, 2021 | Jun 30, 2021 | MR | No | Yes | - | 30 ug/L | - | Resolved | Jun 30, 2021 | - | |
| Apr 1, 2021 | Jun 30, 2021 | MR | No | Yes | - | 5 pCi/L | - | Resolved | Jun 30, 2021 | - | |
| Apr 1, 2021 | Jun 30, 2021 | MR | No | Yes | - | 15 pCi/L | - | Resolved | Jun 30, 2021 | - | |
| Apr 1, 2021 | Jun 30, 2021 | MR | No | Yes | - | 5 pCi/L | - | Resolved | Jun 30, 2021 | - | |
| Apr 1, 2021 | Jun 30, 2021 | MR | No | Yes | - | 15 pCi/L | - | Resolved | Jun 30, 2021 | - | |
| Apr 1, 2021 | Jun 30, 2021 | MR | No | Yes | - | 4 mrem/yr | - | Resolved | Jun 30, 2021 | - | |
| Apr 1, 2021 | Jun 30, 2021 | MR | No | Yes | - | 5 pCi/L | - | Resolved | Jun 30, 2021 | - | |
| Apr 1, 2021 | Jun 30, 2021 | MR | No | Yes | - | 4 mrem/yr | - | Resolved | Jun 30, 2021 | - | |
| Apr 1, 2021 | Jun 30, 2021 | MR | No | Yes | - | 15 pCi/L | - | Resolved | Jun 30, 2021 | - | |
| Apr 1, 2021 | Jun 30, 2021 | MR | No | Yes | - | 4 mrem/yr | - | Resolved | Jun 30, 2021 | - | |
| Apr 1, 2021 | Jun 30, 2021 | MR | No | Yes | - | 30 ug/L | - | Resolved | Jun 30, 2021 | - | |
| Apr 1, 2021 | Jun 30, 2021 | MR | No | Yes | - | 15 pCi/L | - | Resolved | Jun 30, 2021 | - | |
| Apr 1, 2021 | Jun 30, 2021 | MR | No | Yes | - | 30 ug/L | - | Resolved | Jun 30, 2021 | - | |
| Apr 1, 2021 | Jun 30, 2021 | MR | No | Yes | - | 5 pCi/L | - | Resolved | Jun 30, 2021 | - | |
| Apr 1, 2021 | Jun 30, 2021 | MR | No | Yes | - | 4 mrem/yr | - | Resolved | Jun 30, 2021 | - | |
| Jan 1, 2020 | Dec 31, 2020 | MR | No | Yes | - | - | - | Resolved | Dec 31, 2020 | - | |
| Jan 1, 2020 | Dec 31, 2020 | MR | No | Yes | - | - | - | Resolved | Dec 31, 2020 | - | |
| Jan 1, 2020 | Dec 31, 2020 | MR | No | Yes | - | - | - | Resolved | Dec 31, 2020 | - | |
| Jan 1, 2020 | Dec 31, 2020 | MR | No | Yes | - | - | - | Resolved | Dec 31, 2020 | - | |
| Jul 1, 2017 | - | Other | No | No | - | - | - | Resolved | Nov 29, 2017 | - | |
| Jul 1, 2017 | - | Other | No | No | - | - | - | Resolved | Nov 29, 2017 | - | |
| Jul 1, 2015 | - | Other | No | No | - | - | - | Resolved | Jul 25, 2016 | - | |
| Jul 1, 2015 | - | Other | No | No | - | - | - | Resolved | Jul 25, 2016 | - | |
| May 1, 2015 | May 31, 2015 | MR | No | No | - | 5% of samples | - | Resolved | May 31, 2015 | - | |
| May 1, 2015 | May 31, 2015 | MR | No | No | - | 5% of samples | - | Resolved | May 31, 2015 | - | |
| May 1, 2015 | May 31, 2015 | MR | No | No | - | 5% of samples | - | Resolved | May 31, 2015 | - | |
| May 1, 2015 | May 31, 2015 | MCL | Yes | No | - | 5% of samples | - | Resolved | May 31, 2015 | - | |
| May 1, 2015 | May 31, 2015 | MCL | Yes | No | - | 5% of samples | - | Resolved | May 31, 2015 | - | |
| May 1, 2015 | May 31, 2015 | MCL | Yes | No | - | 5% of samples | - | Resolved | May 31, 2015 | - | |
| May 1, 2015 | May 31, 2015 | MCL | Yes | No | - | 5% of samples | - | Resolved | May 31, 2015 | - | |
| May 1, 2015 | May 31, 2015 | MR | No | No | - | 5% of samples | - | Resolved | May 31, 2015 | - | |
| Jul 1, 2014 | - | Other | No | No | - | - | - | Resolved | Jul 25, 2016 | - | |
| Jul 1, 2014 | - | Other | No | No | - | - | - | Resolved | Jul 25, 2016 | - | |
| Jul 1, 2013 | - | Other | No | No | - | - | - | Resolved | Jul 25, 2016 | - | |
| Jul 1, 2013 | - | Other | No | No | - | - | - | Resolved | Jul 25, 2016 | - | |
| Jul 1, 2012 | - | Other | No | No | - | - | - | Resolved | Sep 1, 2016 | - | |
| Jul 1, 2012 | - | Other | No | No | - | - | - | Resolved | Sep 1, 2016 | - | |
| Jul 1, 2011 | - | Other | No | No | - | - | - | Resolved | Sep 1, 2016 | - | |
| Jul 1, 2011 | - | Other | No | No | - | - | - | Resolved | Sep 1, 2016 | - | |
| Jul 1, 2011 | - | Other | No | No | - | - | - | Resolved | Sep 1, 2016 | - | |
| Jul 1, 2011 | Jul 31, 2011 | MR | No | No | - | 5% of samples | - | Resolved | Jul 31, 2011 | - | |
| Jul 1, 2011 | Jul 31, 2011 | MR | No | No | - | 5% of samples | - | Resolved | Jul 31, 2011 | - | |
| Jul 1, 2011 | Jul 31, 2011 | MR | No | No | - | 5% of samples | - | Resolved | Jul 31, 2011 | - | |
| Mar 1, 2011 | Mar 31, 2011 | MR | No | No | - | 5% of samples | - | Resolved | Mar 31, 2011 | - | |
| Mar 1, 2011 | Mar 31, 2011 | MR | No | No | - | 5% of samples | - | Resolved | Mar 31, 2011 | - | |
| Mar 1, 2011 | Mar 31, 2011 | MR | No | No | - | 5% of samples | - | Resolved | Mar 31, 2011 | - |
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.