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Seminole County, Oklahoma — public water systems

At a glance

15 active public water systems are filed under Seminole County, Oklahoma in EPA's SDWIS records, together reporting 17,004 people served. The largest is Seminole, which reports serving 6,899 people. 10 are community water systems serving people where they live; the other 5 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

15

Population served

17K

Community systems

10

Groundwater share

73.3%

How does Seminole County compare with other Oklahoma counties?

Seminole County has the 24th-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 17,004 people served in total, the 43rd-largest county figure in the state and 0.5% of the statewide total. The average system here reports serving 1,134 people, about 61% 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 Seminole County's drinking water come from?

By primary water source, Seminole County's active systems draw on groundwater (11, 73%), purchased surface water (3, 20%) and surface water (1, 6.7%). Overall, 73% rely mainly on groundwater (including purchased groundwater) and 27% 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, Seminole, draws primarily on groundwater.

What kinds of water systems operate in Seminole County?

Seminole County's active systems break down as 10 community systems (67%), 3 non-transient non-community systems (20%) and 2 transient non-community systems (13%). 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 non-transient non-community water system regularly serves at least 25 of the same people for more than six months a year, but not where they live. Schools, factories, office buildings and hospitals with their own supply are typical examples. 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 (73%), private (20%) and Native American (6.7%).

Water systems in Seminole County

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Active public water systems in Seminole County, Oklahoma
#Water systemCountyPopulation servedTypeSource
1SeminoleSeminole6,899CommunityGroundwater
2Wewoka Public Works AuthoritySeminole3,450CommunitySurface water
3Bowlegs Lima WaterSeminole2,500CommunityGroundwater
4Konawa PwaSeminole1,479CommunityGroundwater
5Konawa SchoolSeminole600Non-transient non-communityGroundwater
6Seminole Co. Rwd #7Seminole450CommunityGroundwater
7Seminole Co. Rwd #1Seminole387CommunityPurchased surface water
8Seminole Co. Rw&Swmd #3Seminole337CommunityPurchased surface water
9Seminole Co. Rwd #2Seminole315CommunityPurchased surface water
10Sasakwa RwdSeminole210CommunityGroundwater
11Sasakwa PwaSeminole150CommunityGroundwater
12Og&ESeminole78Non-transient non-communityGroundwater
13St. Crispins Youth CampSeminole75Transient non-communityGroundwater
14Sntp-RivermistSeminole49Non-transient non-communityGroundwater
15Wewoka WoodsSeminole25Transient non-communityGroundwater

Seminole County water systems: frequently asked questions

How many public water systems are in Seminole County, Oklahoma?

EPA's SDWIS records file 15 active public water systems under Seminole County, Oklahoma: 10 community systems (67%), 3 non-transient non-community systems (20%) and 2 transient non-community systems (13%).

Who supplies drinking water in Seminole County, OK?

The largest community water systems filed under Seminole County are Seminole (6,899 people served), Wewoka Public Works Authority (3,450 people served) and Bowlegs Lima Water (2,500 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 Seminole County's drinking water come from groundwater or surface water?

Of the 15 active public water systems in Seminole County, 73% draw mainly on groundwater and 27% on surface water, counting purchased supplies. The largest system, Seminole, uses groundwater.

Where can I find a water quality report for Seminole 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. 10 community systems are filed under Seminole 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 Seminole 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 Seminole County, Oklahoma”, https://aquacensus.com/water-systems/oklahoma/seminole (data as of October 1, 2026).