Public water system · OK2002205
ActiveSeiling
At a glance
Seiling (PWSID OK2002205) is an active community water system in Dewey County, Oklahoma. It reports serving 860 people through 561 service connections. Its primary water source is 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 2023.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
860
Service connections
561
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does Seiling compare with other water systems in Dewey County?
By EPA's size categories, Seiling is a small system (501 to 3,300 people). Dewey County has 8 active public water systems, and Seiling is the largest of them by population served. Its population served is about 156% above the county average of 336 people per system, and accounts for 32% of the 2,690 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 Seiling 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. Groundwater means the system draws its water from wells or springs fed by underground aquifers. 701 Oklahoma systems (56%) list groundwater as their primary source.
Who owns and regulates Seiling?
EPA lists Seiling 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. 6 of the 8 active systems in Dewey County (75%) are also owned by a local government.
Does Seiling 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 2023. The violations listed here began between October 2001 and October 2023. By type: 9 monitoring and reporting, 2 public notice, recordkeeping or other and 1 contaminant level above the legal limit. The contaminant or rule involved most often is Haloacetic acids (HAA5) (2 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 |
|---|---|---|---|---|
| 2023-10-01 | Monitoring and reportingMonitoring, Regular · code 03 | Glyphosatecode 2034 | No | Resolved |
| 2023-10-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nitrate-Nitritecode 1038 | No | Resolved |
| 2023-10-01 | Monitoring and reportingMonitoring, Regular · code 03 | Atrazinecode 2050 | No | Resolved |
| 2021-08-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Haloacetic acids (HAA5)code 2456 | No | Resolved |
| 2021-08-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Total trihalomethanes (TTHM)code 2950 | No | Resolved |
| 2015-01-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 2014-07-01 | Public notice, recordkeeping or otherConsumer Confidence Report Complete Failure to Report · code 71 | Consumer Confidence Rulecode 7000 | No | Resolved |
| 2012-07-01 | Public notice, recordkeeping or otherConsumer Confidence Report Complete Failure to Report · code 71 | Consumer Confidence Rulecode 7000 | No | Resolved |
| 2009-01-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 2008-01-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Haloacetic acids (HAA5)code 2456 | No | Resolved |
| 2008-01-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Total trihalomethanes (TTHM)code 2950 | No | Resolved |
| 2001-10-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Nitratecode 1040 | 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.
Seiling: frequently asked questions
Who runs Seiling?
Seiling (PWSID OK2002205) is a community water system owned by a local government. It is regulated by the OK state drinking water program.
How many people does Seiling serve?
Seiling reports serving 860 people through 561 service connections in Dewey County, Oklahoma.
Where does Seiling get its water?
EPA SDWIS lists this system's primary water source as groundwater. Groundwater means the system draws its water from wells or springs fed by underground aquifers.
Does Seiling 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 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 Seiling'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 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 Seiling's water quality report?
As a community water system, Seiling 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 Dewey County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Vici | Dewey | 668 | Community | Groundwater |
| Leedey | Dewey | 436 | Community | Purchased groundwater |
| Taloga | Dewey | 372 | Community | Groundwater |
| Dewey Co Rwd #2 | Dewey | 150 | Community | Groundwater |
| Dewey Co Rwd #1 | Dewey | 129 | Community | Groundwater |
| Bels Club | Dewey | 50 | 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, “Seiling, PWSID OK2002205, Oklahoma”, https://aquacensus.com/water-systems/oklahoma/seiling-ok2002205 (data as of October 1, 2026).