Public water system · OK3006503
ActiveHammon
At a glance
Hammon (PWSID OK3006503) is an active community water system in Roger Mills County, Oklahoma. It reports serving 568 people through 268 service connections. Its primary water source is purchased groundwater, and EPA lists it as owned by a local government. Of the 12 most recent violations in EPA's records, one is health-based, and the most recent began in October 2024.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
568
Service connections
268
Primary source
GWP
Purchased groundwater
System type
CWS
Community water system
System record
How does Hammon compare with other water systems in Roger Mills County?
By EPA's size categories, Hammon is a small system (501 to 3,300 people). Roger Mills County has 7 active public water systems, and Hammon is the 3rd-largest of them by population served. Its population served is about 50% above the county average of 378 people per system, and accounts for 21% of the 2,649 people reported by systems filed under the county. Across Oklahoma, the 1,254 active systems average 2,907 people each. Nationally, the average active community water system reports serving 6,703 people, so Hammon is well below that figure.
What does “community water system” mean?
A community water system serves at least 15 connections used by year-round residents, or regularly serves at least 25 year-round residents. Homes, apartments and mobile-home parks are served by these. Oklahoma has 864 active community water systems, 69% of the state's 1,254 active systems. Purchased groundwater means the system buys groundwater from another public water system rather than drawing its own. 67 Oklahoma systems (5.3%) list purchased groundwater as their primary source.
Who owns and regulates Hammon?
EPA lists Hammon as owned by a local government. The OK state drinking water program is its primacy agency, the regulator with primary enforcement responsibility for the system under the Safe Drinking Water Act. 5 of the 7 active systems in Roger Mills County (71%) are also owned by a local government.
Does Hammon have drinking water violations?
Of the 12 most recent violations in EPA's records, one is health-based, and the most recent began in October 2024. The violations listed here began between May 2004 and October 2024. By type: 7 monitoring and reporting, 2 monitoring, 1 reporting, 1 required treatment not met and 1 public notice, recordkeeping or other. The contaminant or rule involved most often is Chlorine (3 of them). EPA lists 12 as resolved. Resolved means at least one resolving action is on record: the system returned to compliance, the rule no longer applies, or no further action was needed.
| Began | Violation | Contaminant or rule | Health-based | Status |
|---|---|---|---|---|
| 2024-10-17 | ReportingLSL Reporting · code 4G | Lead and Copper Rule Revisionscode 5200 | No | Resolved |
| 2024-10-17 | Required treatment not metLSL Inventory · code 2E | Lead and Copper Rule Revisionscode 5200 | Yes | Resolved |
| 2023-10-02 | Public notice, recordkeeping or otherConsumer Confidence Report Inadequate Reporting · code 72 | Consumer Confidence Rulecode 7000 | No | Resolved |
| 2023-06-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2023-04-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Chlorinecode 0999 | No | Resolved |
| 2022-11-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2022-10-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Chlorinecode 0999 | No | Resolved |
| 2015-10-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Chlorinecode 0999 | No | Resolved |
| 2014-01-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Total trihalomethanes (TTHM)code 2950 | No | Resolved |
| 2014-01-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Haloacetic acids (HAA5)code 2456 | No | Resolved |
| 2004-12-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 2004-05-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
The 12 most recent violations in EPA's records, newest first.Labels and codes come from EPA's SDWIS reference tables. A monitoring or reporting violation means a required test or report was missed or late; it does not by itself mean a contaminant was found. "Health-based" marks violations of a legal limit or required treatment.
Hammon: frequently asked questions
Who runs Hammon?
Hammon (PWSID OK3006503) is a community water system owned by a local government. It is regulated by the OK state drinking water program.
How many people does Hammon serve?
Hammon reports serving 568 people through 268 service connections in Roger Mills County, Oklahoma.
Where does Hammon get its water?
EPA SDWIS lists this system's primary water source as purchased groundwater. Purchased groundwater means the system buys groundwater from another public water system rather than drawing its own.
Does Hammon have any drinking water violations?
Of the 12 most recent violations in EPA's records, one is health-based, and the most recent began in October 2024. A monitoring or reporting violation means a required test or report was missed or late; it does not by itself mean a contaminant was found.
Is Hammon's water safe to drink?
AquaCensus shows EPA compliance records, not current water test results, so it cannot say whether the water is safe at a given moment. Of the 12 most recent violations in EPA's records, one is health-based, and the most recent began in October 2024. For current results, consult the system's annual water quality report, EPA ECHO, or the OK state drinking water program.
Where can I find Hammon's water quality report?
As a community water system, Hammon must deliver an annual water quality report, called a Consumer Confidence Report, to its customers by July 1 each year, covering the previous calendar year. The system can provide a copy on request.
Other water systems in Roger Mills County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Roger Mills Rwd # 2 (Red Star) | Roger Mills | 800 | Community | Groundwater |
| Cheyenne | Roger Mills | 778 | Community | Surface water |
| Roger Mills Rws & Swmd #1 | Roger Mills | 200 | Community | Groundwater |
| Roger Mills Rws & Swmd #3 (Reydon) | Roger Mills | 177 | Community | Groundwater |
| Croton Creek Ranch | Roger Mills | 100 | Transient non-community | Groundwater |
| Hitchin Post | Roger Mills | 26 | Transient non-community | Groundwater |
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About this data
Source: U.S. EPA Safe Drinking Water Information System (SDWIS) and SDWA violation records, via EPA ECHO, as published October 1, 2026 — AquaCensus refreshes it quarterly. See the methodology for how records are matched, cleaned and scored.
Cite as: AquaCensus, “Hammon, PWSID OK3006503, Oklahoma”, https://aquacensus.com/water-systems/oklahoma/hammon-ok3006503 (data as of October 1, 2026).