HENNESSEY
Oklahoma — Community Water System — PWSID: OK2003704
System Information
| PWSID | OK2003704 |
| System Name | HENNESSEY |
| 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 | Nov 14, 2025 |
Location & Contact
| State | Oklahoma |
| City | HENNESSEY |
| ZIP Code | 73742-0306 |
| Address | The Honorable John R.Gritz, Mayor |
| Organization | HENNESSEY |
| Phone | 405-853-2416 |
Population & Service
| Population Served | 2,058 |
| Service Connections | 1,155 |
Drinking Water Violations (266)
This water system has 266 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Jan 1, 2022 | — | Lead and Copper Rule | MR | No | No | — | TT | — | Resolved | Nov 28, 2022 | Lead and Copper Rule |
| Jan 1, 2022 | — | Lead and Copper Rule | MR | No | No | — | TT | — | Resolved | Nov 28, 2022 | Lead and Copper Rule |
| Jan 1, 2022 | — | Lead and Copper Rule | MR | No | No | — | TT | — | Resolved | Sep 16, 2022 | Lead and Copper Rule |
| Jan 1, 2022 | — | Lead and Copper Rule | MR | No | No | — | TT | — | Resolved | Nov 28, 2022 | Lead and Copper Rule |
| Jan 1, 2022 | — | Lead and Copper Rule | MR | No | No | — | TT | — | Resolved | Sep 16, 2022 | Lead and Copper Rule |
| Jan 1, 2022 | — | Lead and Copper Rule | MR | No | No | — | TT | — | Resolved | Sep 16, 2022 | Lead and Copper Rule |
| Jan 1, 2022 | Mar 31, 2022 | Nitrate-Nitrite | MCL | Yes | No | 11 MG/L | — | 10 | Resolved | Mar 31, 2022 | Nitrate Rule |
| Jan 1, 2022 | Mar 31, 2022 | Nitrate-Nitrite | MCL | Yes | No | 11 MG/L | — | 10 | Resolved | Mar 31, 2022 | Nitrate Rule |
| Jan 1, 2022 | Mar 31, 2022 | Nitrate-Nitrite | MCL | Yes | No | 11 MG/L | — | 10 | Resolved | Mar 31, 2022 | Nitrate Rule |
| Jan 1, 2022 | Mar 31, 2022 | Nitrate-Nitrite | MCL | Yes | No | 11 MG/L | — | 10 | Resolved | Mar 31, 2022 | Nitrate Rule |
| Jan 1, 2022 | — | Lead and Copper Rule | MR | No | No | — | TT | — | Resolved | Sep 16, 2022 | Lead and Copper Rule |
| Jan 1, 2022 | — | Lead and Copper Rule | MR | No | No | — | TT | — | Resolved | Sep 16, 2022 | Lead and Copper Rule |
| Jan 1, 2022 | — | Lead and Copper Rule | MR | No | No | — | TT | — | Resolved | Nov 28, 2022 | Lead and Copper Rule |
| Jul 1, 2021 | — | Lead and Copper Rule | MR | No | No | — | TT | — | Resolved | Dec 1, 2022 | Lead and Copper Rule |
| Jul 1, 2021 | — | Lead and Copper Rule | MR | No | No | — | TT | — | Resolved | Dec 1, 2022 | Lead and Copper Rule |
| Jul 1, 2021 | — | Lead and Copper Rule | MR | No | No | — | TT | — | Resolved | Dec 1, 2022 | Lead and Copper Rule |
| Jul 1, 2021 | — | Lead and Copper Rule | MR | No | No | — | TT | — | Resolved | Dec 1, 2022 | Lead and Copper Rule |
| Jul 1, 2020 | Sep 30, 2020 | Nitrate-Nitrite | MCL | Yes | No | 20 MG/L | — | 10 | Resolved | Sep 30, 2020 | Nitrate Rule |
| Jul 1, 2020 | Sep 30, 2020 | Nitrate-Nitrite | MCL | Yes | No | 20 MG/L | — | 10 | Resolved | Sep 30, 2020 | Nitrate Rule |
| Jul 1, 2020 | Sep 30, 2020 | Nitrate-Nitrite | MCL | Yes | No | 20 MG/L | — | 10 | Resolved | Sep 30, 2020 | Nitrate Rule |
| Jul 1, 2020 | Sep 30, 2020 | Nitrate-Nitrite | MCL | Yes | No | 20 MG/L | — | 10 | Resolved | Sep 30, 2020 | Nitrate Rule |
| Oct 1, 2019 | Dec 31, 2019 | Nitrate-Nitrite | MR | No | Yes | — | — | — | Resolved | Dec 31, 2019 | Nitrate Rule |
| Oct 1, 2019 | Dec 31, 2019 | Nitrate-Nitrite | MR | No | Yes | — | — | — | Resolved | Dec 31, 2019 | Nitrate Rule |
| Oct 1, 2019 | Dec 31, 2019 | Nitrate-Nitrite | MR | No | Yes | — | — | — | Resolved | Dec 31, 2019 | Nitrate Rule |
| Oct 1, 2019 | Dec 31, 2019 | Nitrate-Nitrite | MR | No | Yes | — | — | — | Resolved | Dec 31, 2019 | Nitrate Rule |
| Jan 1, 2019 | Mar 31, 2019 | Chlorine | MR | No | Yes | — | 4.0 mg/L | — | Resolved | Feb 14, 2019 | Stage 1 Disinfectants and Disinfection Byproducts Rule |
| Jan 1, 2019 | Mar 31, 2019 | Chlorine | MR | No | Yes | — | 4.0 mg/L | — | Resolved | Feb 14, 2019 | Stage 1 Disinfectants and Disinfection Byproducts Rule |
| Jan 1, 2019 | Mar 31, 2019 | Chlorine | MR | No | Yes | — | 4.0 mg/L | — | Resolved | Feb 14, 2019 | Stage 1 Disinfectants and Disinfection Byproducts Rule |
| Jan 1, 2019 | Mar 31, 2019 | Chlorine | MR | No | Yes | — | 4.0 mg/L | — | Resolved | Feb 14, 2019 | Stage 1 Disinfectants and Disinfection Byproducts Rule |
| Oct 24, 2018 | — | E. COLI | MR | No | No | — | — | — | Resolved | Feb 14, 2019 | Ground Water Rule |
| Oct 24, 2018 | — | E. COLI | MR | No | No | — | — | — | Resolved | Feb 14, 2019 | Ground Water Rule |
| Oct 24, 2018 | — | E. COLI | MR | No | No | — | — | — | Resolved | Feb 14, 2019 | Ground Water Rule |
| Nov 1, 2017 | Nov 30, 2017 | Revised Total Coliform Rule | MON | No | No | — | — | — | Resolved | Nov 30, 2017 | Revised Total Coliform Rule |
| Nov 1, 2017 | Nov 30, 2017 | Revised Total Coliform Rule | MON | No | No | — | — | — | Resolved | Nov 30, 2017 | Revised Total Coliform Rule |
| Nov 1, 2017 | Nov 30, 2017 | Revised Total Coliform Rule | MON | No | No | — | — | — | Resolved | Nov 30, 2017 | Revised Total Coliform Rule |
| Nov 1, 2017 | Nov 30, 2017 | Revised Total Coliform Rule | MON | No | No | — | — | — | Resolved | Nov 30, 2017 | Revised Total Coliform Rule |
| Oct 1, 2017 | Dec 31, 2017 | Chlorine | MR | No | Yes | — | 4.0 mg/L | — | Resolved | Dec 31, 2017 | Stage 1 Disinfectants and Disinfection Byproducts Rule |
| Oct 1, 2017 | Dec 31, 2017 | Chlorine | MR | No | Yes | — | 4.0 mg/L | — | Resolved | Dec 31, 2017 | Stage 1 Disinfectants and Disinfection Byproducts Rule |
| Oct 1, 2017 | Dec 31, 2017 | Chlorine | MR | No | Yes | — | 4.0 mg/L | — | Resolved | Dec 31, 2017 | Stage 1 Disinfectants and Disinfection Byproducts Rule |
| Oct 1, 2017 | Dec 31, 2017 | Chlorine | MR | No | Yes | — | 4.0 mg/L | — | Resolved | Dec 31, 2017 | Stage 1 Disinfectants and Disinfection Byproducts Rule |
| Jul 1, 2017 | Sep 30, 2017 | Nitrate-Nitrite | MR | No | Yes | — | — | — | Resolved | Sep 30, 2017 | Nitrate Rule |
| Jul 1, 2017 | Sep 30, 2017 | Nitrate-Nitrite | MR | No | Yes | — | — | — | Resolved | Sep 30, 2017 | Nitrate Rule |
| Jul 1, 2017 | Sep 30, 2017 | Nitrate-Nitrite | MR | No | Yes | — | — | — | Resolved | Sep 30, 2017 | Nitrate Rule |
| Jul 1, 2017 | Sep 30, 2017 | Nitrate-Nitrite | MR | No | Yes | — | — | — | Resolved | Sep 30, 2017 | Nitrate Rule |
| Jul 1, 2016 | — | Consumer Confidence Rule | Other | No | No | — | — | — | Resolved | Mar 31, 2017 | Consumer Confidence Rule |
| Jul 1, 2016 | — | Consumer Confidence Rule | Other | No | No | — | — | — | Resolved | Mar 31, 2017 | Consumer Confidence Rule |
| Oct 1, 2014 | Dec 31, 2014 | Nitrate-Nitrite | MCL | Yes | No | 12 MG/L | — | 10 | Resolved | Dec 31, 2014 | Nitrate Rule |
| Oct 1, 2014 | Dec 31, 2014 | Nitrate-Nitrite | MCL | Yes | No | 12 MG/L | — | 10 | Resolved | Dec 31, 2014 | Nitrate Rule |
| Oct 1, 2014 | Dec 31, 2014 | Nitrate-Nitrite | MCL | Yes | No | 12 MG/L | — | 10 | Resolved | Dec 31, 2014 | Nitrate Rule |
| Oct 1, 2014 | Dec 31, 2014 | Nitrate-Nitrite | MCL | Yes | No | 12 MG/L | — | 10 | Resolved | Dec 31, 2014 | Nitrate 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.