Public water system · OK1020902
ActiveOklahoma City
At a glance
Oklahoma City (PWSID OK1020902) is an active community water system in Oklahoma County, Oklahoma. It reports serving 644,000 people through 254,388 service connections. Its primary water source is surface water, and EPA lists it as owned by a local government. EPA's records list 9 violations for this system; 6 are health-based, and the most recent began in July 2012.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
644,000
Service connections
254,388
Primary source
SW
Surface water
System type
CWS
Community water system
System record
How does Oklahoma City compare with other water systems in Oklahoma County?
By EPA's size categories, Oklahoma City is a very large system (more than 100,000 people). Oklahoma County has 113 active public water systems, and Oklahoma City is the largest of them by population served. Its population served is about 82 times the county average of 7,828 people per system, and accounts for 73% of the 884,508 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 Oklahoma City is about 96 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 Oklahoma City?
EPA lists Oklahoma City 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. 19 of the 113 active systems in Oklahoma County (17%) are also owned by a local government.
Does Oklahoma City have drinking water violations?
EPA's records list 9 violations for this system; 6 are health-based, and the most recent began in July 2012. The violations listed here began between December 1993 and July 2012. By type: 6 required treatment not met and 3 monitoring and reporting. The contaminant or rule involved most often is Carbon, total (3 of them). EPA lists 8 as resolved and 1 as archived. 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. 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.
| Began | Violation | Contaminant or rule | Health-based | Status |
|---|---|---|---|---|
| 2012-07-01 | Monitoring and reportingMonitoring, Repeat Major (TCR) · code 25 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 2012-01-01 | Required treatment not metMonthly Turbidity Exceed (Enhanced SWTR) · code 44 | Interim Enhanced Surface Water Treatment Rulecode 0300 | Yes | Resolved |
| 2007-10-01 | Monitoring and reportingMonitoring, Routine (IDSE) · code 30 | Total trihalomethanes (TTHM)code 2950 | No | Resolved |
| 2007-10-01 | Monitoring and reportingMonitoring, Routine (IDSE) · code 30 | Haloacetic acids (HAA5)code 2456 | No | Resolved |
| 2004-07-01 | Required treatment not metTreatment Technique Precursor Removal · code 46 | Carbon, totalcode 2920 | Yes | Resolved |
| 2004-04-01 | Required treatment not metTreatment Technique Precursor Removal · code 46 | Carbon, totalcode 2920 | Yes | Resolved |
| 2004-01-01 | Required treatment not metTreatment Technique Precursor Removal · code 46 | Carbon, totalcode 2920 | Yes | Resolved |
| 2002-03-01 | Required treatment not metTreatment Technique (SWTR and GWR) · code 41 | Surface Water Treatment Rulecode 0200 | Yes | Resolved |
| 1993-12-01 | Required treatment not metTreatment Technique (SWTR and GWR) · code 41 | Surface Water Treatment Rulecode 0200 | Yes | Archived |
All 9 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.
Oklahoma City: frequently asked questions
Who runs Oklahoma City?
Oklahoma City (PWSID OK1020902) is a community water system owned by a local government. It is regulated by the OK state drinking water program.
How many people does Oklahoma City serve?
Oklahoma City reports serving 644,000 people through 254,388 service connections in Oklahoma County, Oklahoma.
Where does Oklahoma City 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 Oklahoma City have any drinking water violations?
EPA's records list 9 violations for this system; 6 are health-based, and the most recent began in July 2012. 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 Oklahoma City'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. EPA's records list 9 violations for this system; 6 are health-based, and the most recent began in July 2012. For current results, consult the system's annual water quality report, EPA ECHO, or the OK state drinking water program.
Where can I find Oklahoma City's water quality report?
As a community water system, Oklahoma City 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 Oklahoma County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Edmond Pwa | Oklahoma | 79,408 | Community | Surface water |
| Midwest City | Oklahoma | 55,935 | Community | Surface water |
| Tinker Air Force Base | Oklahoma | 24,645 | Community | Groundwater |
| Del City | Oklahoma | 22,128 | Community | Surface water |
| Bethany | Oklahoma | 20,307 | Community | Groundwater under influence of surface water |
| Deer Creek Rural Water Corp | Oklahoma | 5,500 | 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, “Oklahoma City, PWSID OK1020902, Oklahoma”, https://aquacensus.com/water-systems/oklahoma/oklahoma-city-ok1020902 (data as of October 1, 2026).