Public water system · OK1021220
ActiveStillwater Utilities Authority
At a glance
Stillwater Utilities Authority (PWSID OK1021220) is an active community water system in Payne County, Oklahoma. It reports serving 53,000 people through 17,348 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, 12 are health-based, and the most recent began in February 2023.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
53,000
Service connections
17,348
Primary source
SW
Surface water
System type
CWS
Community water system
System record
How does Stillwater Utilities Authority compare with other water systems in Payne County?
By EPA's size categories, Stillwater Utilities Authority is a large system (10,001 to 100,000 people). Payne County has 21 active public water systems, and Stillwater Utilities Authority is the largest of them by population served. Its population served is about 15 times the county average of 3,550 people per system, and accounts for 71% of the 74,559 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 Stillwater Utilities Authority is about 7.9 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 Stillwater Utilities Authority?
EPA lists Stillwater Utilities 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 21 active systems in Payne County (52%) are also owned by a local government.
Does Stillwater Utilities Authority have drinking water violations?
Of the 12 most recent violations in EPA's records, 12 are health-based, and the most recent began in February 2023. The violations listed here began between April 2017 and February 2023. By type: 12 required treatment not met. The contaminant or rule involved most often is Carbon, total (6 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 |
|---|---|---|---|---|
| 2023-02-01 | Required treatment not metTreatment Technique (SWTR and GWR) · code 41 | Surface Water Treatment Rulecode 0200 | Yes | Resolved |
| 2023-02-01 | Required treatment not metTreatment Technique (SWTR and GWR) · code 41 | Surface Water Treatment Rulecode 0200 | Yes | Resolved |
| 2022-10-01 | Required treatment not metTreatment Technique Precursor Removal · code 46 | Carbon, totalcode 2920 | Yes | Resolved |
| 2022-07-01 | Required treatment not metTreatment Technique Precursor Removal · code 46 | Carbon, totalcode 2920 | Yes | Resolved |
| 2022-01-01 | Required treatment not metTreatment Technique Precursor Removal · code 46 | Carbon, totalcode 2920 | Yes | Resolved |
| 2021-10-01 | Required treatment not metTreatment Technique Precursor Removal · code 46 | Carbon, totalcode 2920 | Yes | Resolved |
| 2018-10-01 | Required treatment not metSingle Turbidity Exceed (Enhanced SWTR) · code 43 | Interim Enhanced Surface Water Treatment Rulecode 0300 | Yes | Resolved |
| 2018-10-01 | Required treatment not metMonthly Turbidity Exceed (Enhanced SWTR) · code 44 | Interim Enhanced Surface Water Treatment Rulecode 0300 | Yes | Resolved |
| 2018-09-01 | Required treatment not metMonthly Turbidity Exceed (Enhanced SWTR) · code 44 | Interim Enhanced Surface Water Treatment Rulecode 0300 | Yes | Resolved |
| 2017-07-01 | Required treatment not metTreatment Technique Precursor Removal · code 46 | Carbon, totalcode 2920 | Yes | Resolved |
| 2017-05-01 | Required treatment not metMonthly Turbidity Exceed (Enhanced SWTR) · code 44 | Interim Enhanced Surface Water Treatment Rulecode 0300 | Yes | Resolved |
| 2017-04-01 | Required treatment not metTreatment Technique Precursor Removal · code 46 | Carbon, totalcode 2920 | 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.
Stillwater Utilities Authority: frequently asked questions
Who runs Stillwater Utilities Authority?
Stillwater Utilities Authority (PWSID OK1021220) is a community water system owned by a local government. It is regulated by the OK state drinking water program.
How many people does Stillwater Utilities Authority serve?
Stillwater Utilities Authority reports serving 53,000 people through 17,348 service connections in Payne County, Oklahoma.
Where does Stillwater Utilities 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 Stillwater Utilities Authority have any drinking water violations?
Of the 12 most recent violations in EPA's records, 12 are health-based, and the most recent began in February 2023. 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 Stillwater Utilities 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, 12 are health-based, and the most recent began in February 2023. For current results, consult the system's annual water quality report, EPA ECHO, or the OK state drinking water program.
Where can I find Stillwater Utilities Authority's water quality report?
As a community water system, Stillwater Utilities 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 Payne County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Cushing | Payne | 8,371 | Community | Groundwater |
| Payne Co Rw Corp #3 | Payne | 3,000 | Community | Purchased surface water |
| Perkins | Payne | 2,572 | Community | Groundwater |
| 51 East Water | Payne | 2,500 | Community | Purchased surface water |
| Payne Co Rwd #3 | Payne | 1,400 | Community | Purchased surface water |
| Yale | Payne | 1,227 | 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, “Stillwater Utilities Authority, PWSID OK1021220, Oklahoma”, https://aquacensus.com/water-systems/oklahoma/stillwater-utilities-authority-ok1021220 (data as of October 1, 2026).