Public water system · OK1221645
ActiveSouth Delaware Co Regional Water Auth.
At a glance
South Delaware Co Regional Water Auth. (PWSID OK1221645) is an active community water system in Delaware County, Oklahoma. It reports serving 1,500 people through 621 service connections. Its primary water source is surface water, and EPA lists it as privately owned. Of the 12 most recent violations in EPA's records, 3 are health-based, and the most recent began in October 2024.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
1,500
Service connections
621
Primary source
SW
Surface water
System type
CWS
Community water system
System record
How does South Delaware Co Regional Water Auth. compare with other water systems in Delaware County?
By EPA's size categories, South Delaware Co Regional Water Auth. is a small system (501 to 3,300 people). Delaware County has 35 active public water systems, and South Delaware Co Regional Water Auth. is the 5th-largest of them by population served. Its population served is about twice the county average of 714 people per system, and accounts for 6% of the 24,973 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 South Delaware Co Regional Water Auth. 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. 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 South Delaware Co Regional Water Auth.?
EPA lists South Delaware Co Regional Water Auth. as privately owned. 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. 22 of the 35 active systems in Delaware County (63%) are also privately owned.
Does South Delaware Co Regional Water Auth. have drinking water violations?
Of the 12 most recent violations in EPA's records, 3 are health-based, and the most recent began in October 2024. The violations listed here began between October 2022 and October 2024. By type: 7 monitoring and reporting, 3 required treatment not met, 1 reporting and 1 public notice, recordkeeping or other. The contaminant or rule involved most often is Carbon, total (4 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 | Required treatment not metLSL Inventory · code 2E | Lead and Copper Rule Revisionscode 5200 | Yes | Resolved |
| 2024-10-17 | ReportingLSL Reporting · code 4G | Lead and Copper Rule Revisionscode 5200 | No | Resolved |
| 2024-08-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Carbon, totalcode 2920 | No | Resolved |
| 2024-08-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Carbon, totalcode 2920 | No | Resolved |
| 2024-07-01 | Public notice, recordkeeping or otherConsumer Confidence Report Complete Failure to Report · code 71 | Consumer Confidence Rulecode 7000 | No | Resolved |
| 2024-03-01 | Required treatment not metTreatment Technique (SWTR and GWR) · code 41 | Surface Water Treatment Rulecode 0200 | Yes | Resolved |
| 2023-07-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Carbon, totalcode 2920 | No | Resolved |
| 2023-07-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Carbon, totalcode 2920 | No | Resolved |
| 2023-01-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Total trihalomethanes (TTHM)code 2950 | No | Resolved |
| 2023-01-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Haloacetic acids (HAA5)code 2456 | No | Resolved |
| 2022-12-01 | Required treatment not metSingle Turbidity Exceed (Enhanced SWTR) · code 43 | Interim Enhanced Surface Water Treatment Rulecode 0300 | Yes | Resolved |
| 2022-10-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Chlorinecode 0999 | 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.
South Delaware Co Regional Water Auth.: frequently asked questions
Who runs South Delaware Co Regional Water Auth.?
South Delaware Co Regional Water Auth. (PWSID OK1221645) is a community water system privately owned. It is regulated by the OK state drinking water program.
How many people does South Delaware Co Regional Water Auth. serve?
South Delaware Co Regional Water Auth. reports serving 1,500 people through 621 service connections in Delaware County, Oklahoma.
Where does South Delaware Co Regional Water Auth. 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 South Delaware Co Regional Water Auth. have any drinking water violations?
Of the 12 most recent violations in EPA's records, 3 are 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 South Delaware Co Regional Water Auth.'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, 3 are 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 South Delaware Co Regional Water Auth.'s water quality report?
As a community water system, South Delaware Co Regional Water Auth. 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 Delaware County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Grove Municipal Services Auth. | Delaware | 7,311 | Community | Surface water |
| Grand Lake Pwa | Delaware | 2,800 | Community | Groundwater |
| Jay | Delaware | 2,482 | Community | Surface water |
| Ketchum Pwa Delaware Co System | Delaware | 1,805 | Community | Surface water |
| Delaware Co Rwd #10 | Delaware | 1,295 | Community | Groundwater |
| West Siloam Springs | Delaware | 877 | 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, “South Delaware Co Regional Water Auth., PWSID OK1221645, Oklahoma”, https://aquacensus.com/water-systems/oklahoma/south-delaware-co-regional-water-auth-ok1221645 (data as of October 1, 2026).