Harper County, Oklahoma — public water systems
At a glance
3 active public water systems are filed under Harper County, Oklahoma in EPA's SDWIS records, together reporting 2,495 people served. The largest is Buffalo, which reports serving 1,200 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
2.5K
Community systems
3
Groundwater share
100%
How does Harper County compare with other Oklahoma counties?
Harper County has the 78th-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 2,495 people served in total, the 76th-largest county figure in the state and less than 0.1% of the statewide total. The average system here reports serving 832 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 Harper County's drinking water come from?
By primary water source, Harper County's active systems draw on groundwater (3, 100%). 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, Buffalo, draws primarily on groundwater.
What kinds of water systems operate in Harper County?
Harper 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 Harper County
🔒 Create a free account to export CSV| # | Water system | County | Population served | Type | Source |
|---|---|---|---|---|---|
| 1 | Buffalo | Harper | 1,200 | Community | Groundwater |
| 2 | Laverne | Harper | 1,097 | Community | Groundwater |
| 3 | Harper Co Rwd #1 | Harper | 198 | Community | Groundwater |
Harper County water systems: frequently asked questions
How many public water systems are in Harper County, Oklahoma?
EPA's SDWIS records file 3 active public water systems under Harper County, Oklahoma: 3 community systems (100%).
Who supplies drinking water in Harper County, OK?
The largest community water systems filed under Harper County are Buffalo (1,200 people served), Laverne (1,097 people served) and Harper Co Rwd #1 (198 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 Harper County's drinking water come from groundwater or surface water?
Of the 3 active public water systems in Harper County, all draw mainly on groundwater and none on surface water, counting purchased supplies. The largest system, Buffalo, uses groundwater.
Where can I find a water quality report for Harper 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 Harper 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 Harper 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 Harper County, Oklahoma”, https://aquacensus.com/water-systems/oklahoma/harper (data as of October 1, 2026).