Tillman County, Oklahoma — public water systems
At a glance
7 active public water systems are filed under Tillman County, Oklahoma in EPA's SDWIS records, together reporting 8,179 people served. The largest is Frederick, which reports serving 3,940 people. All 7 are community water systems serving people where they live.
Dataset updated . Source: EPA SDWIS/ECHO, refreshed quarterly.
Active systems
7
Population served
8.2K
Community systems
7
Groundwater share
14.3%
How does Tillman County compare with other Oklahoma counties?
Tillman County has the 66th-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 8,179 people served in total, the 58th-largest county figure in the state and 0.2% of the statewide total. The average system here reports serving 1,168 people, about 60% 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 Tillman County's drinking water come from?
By primary water source, Tillman County's active systems draw on purchased surface water (5, 71%), surface water (1, 14%) and purchased groundwater (1, 14%). Overall, 14% rely mainly on groundwater (including purchased groundwater) and 86% on surface water, compared with 62% and 38% across Oklahoma. Purchased surface water means the system buys surface water from another public water system rather than drawing its own. The county's largest system, Frederick, draws primarily on surface water.
What kinds of water systems operate in Tillman County?
Tillman County's active systems break down as 7 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 Tillman County
🔒 Create a free account to export CSV| # | Water system | County | Population served | Type | Source |
|---|---|---|---|---|---|
| 1 | Frederick | Tillman | 3,940 | Community | Surface water |
| 2 | Tillman Co Rwd #1 | Tillman | 1,500 | Community | Purchased surface water |
| 3 | Grandfield | Tillman | 1,110 | Community | Purchased surface water |
| 4 | Tipton | Tillman | 916 | Community | Purchased surface water |
| 5 | Davidson | Tillman | 375 | Community | Purchased surface water |
| 6 | Manitou | Tillman | 278 | Community | Purchased surface water |
| 7 | Hollister | Tillman | 60 | Community | Purchased groundwater |
Tillman County water systems: frequently asked questions
How many public water systems are in Tillman County, Oklahoma?
EPA's SDWIS records file 7 active public water systems under Tillman County, Oklahoma: 7 community systems (100%).
Who supplies drinking water in Tillman County, OK?
The largest community water systems filed under Tillman County are Frederick (3,940 people served), Tillman Co Rwd #1 (1,500 people served) and Grandfield (1,110 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 Tillman County's drinking water come from groundwater or surface water?
Of the 7 active public water systems in Tillman County, 14% draw mainly on groundwater and 86% on surface water, counting purchased supplies. The largest system, Frederick, uses surface water.
Where can I find a water quality report for Tillman 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. 7 community systems are filed under Tillman 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 Tillman 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 Tillman County, Oklahoma”, https://aquacensus.com/water-systems/oklahoma/tillman (data as of October 1, 2026).