Public water system · OK1020504
ActiveShawnee Municipal Authority
At a glance
Shawnee Municipal Authority (PWSID OK1020504) is an active community water system in Pottawatomie County, Oklahoma. It reports serving 29,990 people through 13,772 service connections. Its primary water source is surface water, and EPA lists it as owned by a local government. Of the 12 most recent violations in EPA's records, 7 are health-based, and the most recent began in February 2026.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
29,990
Service connections
13,772
Primary source
SW
Surface water
System type
CWS
Community water system
System record
How does Shawnee Municipal Authority compare with other water systems in Pottawatomie County?
By EPA's size categories, Shawnee Municipal Authority is a large system (10,001 to 100,000 people). Pottawatomie County has 24 active public water systems, and Shawnee Municipal Authority is the largest of them by population served. Its population served is about 15 times the county average of 1,949 people per system, and accounts for 64% of the 46,772 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 Shawnee Municipal Authority is about 4.5 times 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. Surface water means the system draws its water from rivers, lakes, streams or reservoirs. 175 Oklahoma systems (14%) list surface water as their primary source.
Who owns and regulates Shawnee Municipal Authority?
EPA lists Shawnee Municipal Authority 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. 11 of the 24 active systems in Pottawatomie County (46%) are also owned by a local government.
Does Shawnee Municipal Authority have drinking water violations?
Of the 12 most recent violations in EPA's records, 7 are health-based, and the most recent began in February 2026. The violations listed here began between July 2015 and February 2026. By type: 7 required treatment not met and 5 monitoring and reporting. The contaminant or rule involved most often is Carbon, total (8 of them). EPA lists 7 as archived and 5 as resolved. Archived means the violation was not marked resolved but is more than five years past the end of the noncompliance period, so it no longer counts toward current compliance status. 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 |
|---|---|---|---|---|
| 2026-02-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Carbon, totalcode 2920 | No | Archived |
| 2026-02-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Carbon, totalcode 2920 | No | Archived |
| 2025-10-01 | Required treatment not metTreatment Technique Precursor Removal · code 46 | Carbon, totalcode 2920 | Yes | Archived |
| 2025-07-01 | Required treatment not metTreatment Technique Precursor Removal · code 46 | Carbon, totalcode 2920 | Yes | Archived |
| 2025-04-01 | Required treatment not metTreatment Technique Precursor Removal · code 46 | Carbon, totalcode 2920 | Yes | Archived |
| 2025-01-01 | Required treatment not metTreatment Technique Precursor Removal · code 46 | Carbon, totalcode 2920 | Yes | Archived |
| 2024-09-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Carbon, totalcode 2920 | No | Resolved |
| 2024-09-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Carbon, totalcode 2920 | No | Resolved |
| 2020-06-01 | Required treatment not metMonthly Turbidity Exceed (Enhanced SWTR) · code 44 | Interim Enhanced Surface Water Treatment Rulecode 0300 | Yes | Resolved |
| 2019-07-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Chlorinecode 0999 | No | Archived |
| 2016-08-01 | Required treatment not metMonthly Turbidity Exceed (Enhanced SWTR) · code 44 | Interim Enhanced Surface Water Treatment Rulecode 0300 | Yes | Resolved |
| 2015-07-01 | Required treatment not metMonthly Turbidity Exceed (Enhanced SWTR) · code 44 | Interim Enhanced Surface Water Treatment Rulecode 0300 | Yes | 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.
Shawnee Municipal Authority: frequently asked questions
Who runs Shawnee Municipal Authority?
Shawnee Municipal Authority (PWSID OK1020504) is a community water system owned by a local government. It is regulated by the OK state drinking water program.
How many people does Shawnee Municipal Authority serve?
Shawnee Municipal Authority reports serving 29,990 people through 13,772 service connections in Pottawatomie County, Oklahoma.
Where does Shawnee Municipal Authority get its water?
EPA SDWIS lists this system's primary water source as surface water. Surface water means the system draws its water from rivers, lakes, streams or reservoirs.
Does Shawnee Municipal Authority have any drinking water violations?
Of the 12 most recent violations in EPA's records, 7 are health-based, and the most recent began in February 2026. 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 Shawnee Municipal Authority'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, 7 are health-based, and the most recent began in February 2026. For current results, consult the system's annual water quality report, EPA ECHO, or the OK state drinking water program.
Where can I find Shawnee Municipal Authority's water quality report?
As a community water system, Shawnee Municipal Authority 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 Pottawatomie County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Tecumseh Utility Authority | Pottawatomie | 6,098 | Community | Surface water |
| Tri-County Rwd #2 | Pottawatomie | 5,172 | Community | Groundwater |
| Pottawatomie Co Development Auth | Pottawatomie | 1,200 | Community | Purchased surface water |
| Maud | Pottawatomie | 1,136 | Community | Groundwater |
| Pottawatomie County Rwd #3 | Pottawatomie | 560 | Community | Surface water |
| Wanette Public Works Authority | Pottawatomie | 402 | Community | Purchased surface water |
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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, “Shawnee Municipal Authority, PWSID OK1020504, Oklahoma”, https://aquacensus.com/water-systems/oklahoma/shawnee-municipal-authority-ok1020504 (data as of October 1, 2026).