Oklahoma
Delaware County drinking water quality
37 active public water systems serve 25,428 people in Delaware County. 5 are compliant, 32 had at least one EPA violation in the past three years, 2 are designated serious violators, and 2 carry a health flag.
Needs attention
Community water systems
26 systems, largest first| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Grove Municipal Services Auth. |
7,311 | 4 | 1 | |
|
Grand Lake Pwa |
2,800 | 3 | 0 | |
|
Jay |
2,482 | 4 | 1 | |
|
Ketchum Pwa Delaware CO System |
1,805 | 0 | 0 | |
|
South Delaware CO Regional Water Auth. |
1,500 | 5 | 0 | |
|
Delaware CO Rwd #10 |
1,295 | 1 | 0 | |
|
West Siloam Springs |
877 | 6 | 0 | |
|
Colcord Pwa |
819 | 4 | 0 | |
|
Kansas Public Works Authority |
802 | 1 | 0 | |
|
Delaware CO Rwd # 12 |
785 | 2 | 0 | |
|
Delaware CO Rwsg&swm District 11 |
750 | 3 | 1 | |
|
Delaware CO Rwd # 3 |
653 | 2 | 0 | |
|
Bernice Pwa |
504 | 3 | 0 | |
|
Delaware CO Rwd # 1 |
465 | 1 | 0 | |
|
Delaware CO Rwd # 7 |
400 | 1 | 0 | |
|
Seneca-Cayuga Nation |
400 | 10 | 3 | |
|
Lakewood Village |
293 | 7 | 2 | |
|
Carriage Hills |
160 | 3 | 1 | |
|
Hickory Meadows |
157 | 8 | 5 | |
|
Leisure Shores Water System Assn, INC |
150 | 2 | 1 | |
|
Holiday Shores Prop Assn |
136 | 3 | 1 | |
|
Caair |
100 | 5 | 1 | |
|
Coves at Bird Island |
100 | 5 | 0 | |
|
Oak Ridge Estates I & II Water Assoc. |
62 | 11 | 4 | |
|
England Shores MHP |
55 | 8 | 3 | |
|
New Life Ranch, Flint Valley |
35 | 1 | 0 |
Non-community systems (11: schools, campgrounds, workplaces, restaurants)
These systems serve places people visit rather than homes.
| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Spinnaker Point Estates |
120 | 2 | 0 | |
|
Harbors View Marina |
100 | 1 | 0 | |
|
Tulsa Ozark Club |
55 | 0 | 0 | |
|
West Bay Property Assn |
50 | 3 | 0 | |
|
Cayuga Park Resort |
40 | 0 | 0 | |
|
Smittys Resort |
40 | 0 | 0 | |
|
VFW Post 8380 |
35 | 1 | 0 | |
|
Eagles Landing Resort |
28 | 0 | 0 | |
|
North Grand Mobile and RV Park |
28 | 1 | 0 | |
|
Grandview Village |
24 | 5 | 0 | |
|
Grand Country Lakeside RV & MHP |
12 | 2 | 0 |
Inactive systems (301, no longer operating or reporting)
Kept for the record and excluded from the county totals above. Browse inactive systems.
About this data
Totals cover active systems. Systems serving more than one county are counted in each county. EPA counts the rules a system was in violation of, not the individual violations; one rule can carry several.
Source: the U.S. EPA's Enforcement and Compliance History Online system (ECHO), which publishes the federal Safe Drinking Water Information System. EPA's terms and values are shown as published. The Oklahoma records are from EPA's data refresh of Oct 7, 2026; EPA refreshes this data quarterly, and states report to EPA with a lag of three to six months, so the newest violations may not appear yet. Retrieved from ECHO on Oct 11, 2026.