Dewey County, Oklahoma — public water systems
At a glance
8 active public water systems are filed under Dewey County, Oklahoma in EPA's SDWIS records, together reporting 2,690 people served. The largest is Seiling, which reports serving 860 people. 6 are community water systems serving people where they live; the other 2 are non-community systems, such as schools, workplaces, campgrounds and gas stations with their own supply.
Dataset updated . Source: EPA SDWIS/ECHO, refreshed quarterly.
Active systems
8
Population served
2.7K
Community systems
6
Groundwater share
100%
How does Dewey County compare with other Oklahoma counties?
Dewey County has the 63rd-most active public water systems among the 92 counties listed for active Oklahoma systems in EPA records; among the 78 with 3 or more systems, the median has 11. Its systems report 2,690 people served in total, the 73rd-largest county figure in the state and less than 0.1% of the statewide total. The average system here reports serving 336 people, well below the Oklahoma average of 2,907. Population figures are what each system reports; people served by more than one system, such as a wholesaler and the town that buys from it, are counted by each.
Where does Dewey County's drinking water come from?
By primary water source, Dewey County's active systems draw on groundwater (7, 88%) and purchased groundwater (1, 13%). Overall, all rely mainly on groundwater (including purchased groundwater) and none on surface water, compared with 62% and 38% across Oklahoma. Groundwater means the system draws its water from wells or springs fed by underground aquifers. The county's largest system, Seiling, draws primarily on groundwater.
What kinds of water systems operate in Dewey County?
Dewey County's active systems break down as 6 community systems (75%) and 2 transient non-community systems (25%). 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. A transient non-community water system serves places where people do not stay long, such as gas stations and campgrounds, and regularly serves at least 25 people a day for at least 60 days a year. EPA lists their owner types as local government (75%) and private (25%).
Water systems in Dewey County
🔒 Create a free account to export CSV| # | Water system | County | Population served | Type | Source |
|---|---|---|---|---|---|
| 1 | Seiling | Dewey | 860 | Community | Groundwater |
| 2 | Vici | Dewey | 668 | Community | Groundwater |
| 3 | Leedey | Dewey | 436 | Community | Purchased groundwater |
| 4 | Taloga | Dewey | 372 | Community | Groundwater |
| 5 | Dewey Co Rwd #2 | Dewey | 150 | Community | Groundwater |
| 6 | Dewey Co Rwd #1 | Dewey | 129 | Community | Groundwater |
| 7 | Bels Club | Dewey | 50 | Transient non-community | Groundwater |
| 8 | Red'S Grocery | Dewey | 25 | Transient non-community | Groundwater |
Dewey County water systems: frequently asked questions
How many public water systems are in Dewey County, Oklahoma?
EPA's SDWIS records file 8 active public water systems under Dewey County, Oklahoma: 6 community systems (75%) and 2 transient non-community systems (25%).
Who supplies drinking water in Dewey County, OK?
The largest community water systems filed under Dewey County are Seiling (860 people served), Vici (668 people served) and Leedey (436 people served). Which system serves a particular address depends on its service area, which EPA's SDWIS records do not include; a water bill or the local utility can confirm it.
Does Dewey County's drinking water come from groundwater or surface water?
Of the 8 active public water systems in Dewey County, all draw mainly on groundwater and none on surface water, counting purchased supplies. The largest system, Seiling, uses groundwater.
Where can I find a water quality report for Dewey County?
Each community water system must deliver an annual water quality report, called a Consumer Confidence Report, to its customers by July 1, covering the previous calendar year. 6 community systems are filed under Dewey County, so the report to look for is the one from the system that supplies your address.
How can I check violations for a water system in Dewey County?
Open the system's profile from the list on this page. Each profile shows the most recent Safe Drinking Water Act violations in EPA's records, with plain-English labels and whether each one is resolved. For current compliance status, EPA ECHO is the primary source.
More Oklahoma water systems
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, “Public water systems in Dewey County, Oklahoma”, https://aquacensus.com/water-systems/oklahoma/dewey (data as of October 1, 2026).