Harmon County, Oklahoma — public water systems
At a glance
3 active public water systems are filed under Harmon County, Oklahoma in EPA's SDWIS records, together reporting 3,602 people served. The largest is Hollis, which reports serving 2,264 people. All 3 are community water systems serving people where they live.
Dataset updated . Source: EPA SDWIS/ECHO, refreshed quarterly.
Active systems
3
Population served
3.6K
Community systems
3
Groundwater share
100%
How does Harmon County compare with other Oklahoma counties?
Harmon County has the 77th-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 3,602 people served in total, the 70th-largest county figure in the state and less than 0.1% of the statewide total. The average system here reports serving 1,201 people, about 59% 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 Harmon County's drinking water come from?
By primary water source, Harmon County's active systems draw on groundwater (2, 67%) and purchased groundwater (1, 33%). 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, Hollis, draws primarily on groundwater.
What kinds of water systems operate in Harmon County?
Harmon County's active systems break down as 3 community systems (100%). 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. EPA lists their owner types as local government (100%).
Water systems in Harmon County
🔒 Create a free account to export CSV| # | Water system | County | Population served | Type | Source |
|---|---|---|---|---|---|
| 1 | Hollis | Harmon | 2,264 | Community | Groundwater |
| 2 | Harmon Water Corp | Harmon | 1,132 | Community | Groundwater |
| 3 | Gould Pwa | Harmon | 206 | Community | Purchased groundwater |
Harmon County water systems: frequently asked questions
How many public water systems are in Harmon County, Oklahoma?
EPA's SDWIS records file 3 active public water systems under Harmon County, Oklahoma: 3 community systems (100%).
Who supplies drinking water in Harmon County, OK?
The largest community water systems filed under Harmon County are Hollis (2,264 people served), Harmon Water Corp (1,132 people served) and Gould Pwa (206 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 Harmon County's drinking water come from groundwater or surface water?
Of the 3 active public water systems in Harmon County, all draw mainly on groundwater and none on surface water, counting purchased supplies. The largest system, Hollis, uses groundwater.
Where can I find a water quality report for Harmon 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. 3 community systems are filed under Harmon 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 Harmon 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 Harmon County, Oklahoma”, https://aquacensus.com/water-systems/oklahoma/harmon (data as of October 1, 2026).