Systems reaching a study comparison level
5.1%7 of 136 active community water systems with complete monitoring
All 136 systems had complete monitoring. 7 reached at least one study comparison level; 129 did not. “Study comparison level” means the dated EPA technical cutoff used in this January 2026 research release. It does not determine household exposure, health risk, or current legal compliance.
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ZIP codes are used only to route visitors to public water systems that reported serving them. Confirm the actual provider using a water bill or utility record.
Compound summary
System counts in Oklahoma
Each count shows how many included water systems reached the named study level.
| Study comparison | Systems reaching level | Water systems included | Percent |
|---|---|---|---|
| PFOA: study level 4.05 ppt (April 2024 EPA level: 4 ppt) | 0 | 136 | 0.0% |
| PFOS: study level 4.05 ppt (April 2024 EPA level: 4 ppt) | 7 | 136 | 5.1% |
| PFHxS: study level 15 ppt (April 2024 EPA level: 10 ppt) | 1 | 136 | 0.7% |
| PFNA: study level 15 ppt (April 2024 EPA level: 10 ppt) | 0 | 136 | 0.0% |
| HFPO-DA: study level 15 ppt (April 2024 EPA level: 10 ppt) | 0 | 136 | 0.0% |
| Hazard Index: study level 1.5 with at least two detected components (April 2024 EPA level: 1) | 0 | 136 | 0.0% |
System directory
Community water systems with complete monitoring
Each PWSID appears once, preventing double counting across ZIP associations.
| Public water system | PWSID | Population served | Primary source | Sampling locations | Study comparison |
|---|---|---|---|---|---|
| ALFALFA CO RWS & SWMD #1 NORTH | OK2000201 | 600 | Ground water | 2 | Below the study levels |
| ALTUS | OK1011501 | 18,717 | Surface water | 1 | Below the study levels |
| ALTUS AFB | OK3003303 | 4,617 | Surface water purchased | 1 | Below the study levels |
| ALVA | OK2007603 | 5,208 | Ground water | 1 | Below the study levels |
| ANADARKO PUBLIC WORKS AUTHORITY | OK1010806 | 6,804 | Surface water | 1 | Below the study levels |
| ARDMORE | OK1010814 | 24,893 | Surface water | 1 | Below the study levels |
| BARTLESVILLE | OK1021401 | 34,748 | Surface water | 1 | Below the study levels |
| BETHANY | OK2005519 | 20,307 | Groundwater under influence of surface water | 1 | Below the study levels |
| BIXBY PUBLIC WORKS AUTHORITY | OK3007243 | 18,750 | Surface water purchased | 1 | Below the study levels |
| BLACKWELL MUNICIPAL AUTHORITY | OK1021101 | 7,668 | Surface water | 1 | Below the study levels |
| BRISTOW MUNICIPAL AUTHORITY | OK2001910 | 3,700 | Ground water | 5 | Below the study levels |
| BROKEN ARROW MUNICIPAL AUTHORITY | OK1021508 | 116,330 | Surface water | 1 | Reached a study level |
| BROKEN BOW PWA | OK1010214 | 4,320 | Surface water | 1 | Below the study levels |
| BRYAN CO. RW&SD #5 | OK3000704 | 8,325 | Surface water purchased | 2 | Below the study levels |
| BRYAN CO. RWS & SWMD #2 | OK1010604 | 6,270 | Surface water | 2 | Below the study levels |
| CADDO CO RWD #3 | OK2000816 | 3,900 | Ground water | 10 | Below the study levels |
| CAMARGO RWD #2 | OK2002202 | 150 | Ground water | 1 | Below the study levels |
| CHICKASAW WINSTAR | 062004336 | 8,376 | Ground water | 4 | Below the study levels |
| CHICKASHA MUNICIPAL AUTHORITY | OK1010821 | 16,036 | Surface water | 1 | Below the study levels |
| CHOCTAW | OK2005510 | 3,926 | Ground water | 5 | Below the study levels |
| CLAREMORE | OK1021512 | 15,873 | Surface water | 1 | Below the study levels |
| CLINTON | OK1010828 | 8,883 | Surface water | 2 | Below the study levels |
| COLLINSVILLE | OK1021505 | 5,400 | Surface water | 1 | Below the study levels |
| COWETA | OK1021509 | 9,450 | Surface water | 1 | Below the study levels |
| CRAIG CO RWD #2 | OK3001802 | 4,250 | Surface water purchased | 2 | Below the study levels |
| CREEK CO RWD # 1 | OK1020419 | 5,675 | Surface water | 1 | Below the study levels |
| CREEK CO RWD # 2 | OK3001902 | 12,788 | Surface water purchased | 3 | Below the study levels |
| CUSHING | OK2006061 | 8,371 | Ground water | 1 | Below the study levels |
| DEL CITY | OK1020805 | 22,128 | Surface water | 9 | Below the study levels |
| DEWEY PUBLIC WORKS AUTHORITY | OK3007402 | 3,490 | Surface water purchased | 2 | Below the study levels |
| DUNCAN PUBLIC UTILITIES AUTHORITY | OK1010809 | 23,000 | Surface water | 2 | Below the study levels |
| DURANT UTILITIES AUTHORITY | OK1010601 | 15,545 | Surface water | 1 | Below the study levels |
| EASTERN SHAWNEE | 061000101 | 796 | Ground water | 1 | Below the study levels |
| EDMOND PWA - ARCADIA | OK1020723 | 79,408 | Surface water | 18 | Below the study levels |
| EL RENO | OK2000902 | 16,212 | Surface water purchased | 1 | Below the study levels |
| ELK CITY | OK2000501 | 10,510 | Ground water | 1 | Below the study levels |
| ENID | OK2002412 | 49,347 | Surface water | 5 | Below the study levels |
| EUFAULA PWA | OK1020514 | 2,766 | Surface water | 1 | Below the study levels |
| FORT SILL HQUSAFACFS | OK3001601 | 23,000 | Surface water purchased | 1 | Below the study levels |
| GARVIN CO RWD #4 | OK3002503 | 1,340 | Surface water purchased | 2 | Below the study levels |
| GLENPOOL WATER | OK3007223 | 12,500 | Surface water purchased | 1 | Below the study levels |
| GRADY CO RWD #6 | OK3002603 | 3,930 | Ground water | 1 | Below the study levels |
| GROVE MUNICIPAL SERVICES AUTH. | OK1021614 | 7,311 | Surface water | 1 | Below the study levels |
| GUYMON | OK2007003 | 11,442 | Ground water | 6 | Below the study levels |
| HALLETT PUBLIC WORKS AUTHORITY | OK2005905 | 168 | Ground water | 1 | Below the study levels |
| HARRAH | OK2005506 | 4,190 | Ground water | 6 | Below the study levels |
| HEAVENER UTILITY AUTH - PSG | OK1020101 | 3,000 | Surface water purchased | 2 | Below the study levels |
| HENRYETTA | OK1020709 | 6,096 | Surface water | 1 | Below the study levels |
| HOBART | OK1011502 | 3,746 | Surface water purchased | 1 | Below the study levels |
| HUGO MUNICIPAL AUTHORITY | OK1010314 | 5,536 | Surface water | 1 | Below the study levels |
| HYDRO PWA | OK2000812 | 1,060 | Ground water | 1 | Below the study levels |
| IDABEL PWA | OK1010203 | 6,952 | Surface water | 1 | Below the study levels |
| JEFFERSON CO CONS RWD #1 | OK3003401 | 8,398 | Surface water purchased | 2 | Below the study levels |
| JENKS PWA | OK3007201 | 16,924 | Surface water purchased | 1 | Below the study levels |
| KETCHUM PWA | OK1021612 | 4,025 | Surface water | 1 | Below the study levels |
| LAWTON | OK1011303 | 92,757 | Surface water | 2 | Below the study levels |
| LEFLORE CO. RWD #2 | OK3004007 | 4,700 | Surface water purchased | 1 | Below the study levels |
| LOGAN CO RWD #1 | OK2004207 | 8,907 | Surface water purchased | 11 | Below the study levels |
| LONE GROVE | OK2001007 | 4,863 | Ground water | 5 | Below the study levels |
| MANNFORD | OK1020909 | 3,935 | Surface water | 1 | Below the study levels |
| MARLOW PWA | OK2006907 | 4,600 | Ground water | 2 | Below the study levels |
| MARSHALL COUNTY WATER CORP | OK1010848 | 17,587 | Surface water | 1 | Below the study levels |
| MAYES CO RWD # 2 | OK3004608 | 6,280 | Surface water purchased | 1 | Reached a study level |
| MAYES CO RWD # 5 | OK3004616 | 3,360 | Surface water purchased | 2 | Below the study levels |
| MAYES CO RWD # 6 | OK1021666 | 3,750 | Surface water | 1 | Below the study levels |
| MCALESTER PWA | OK1020609 | 18,206 | Surface water | 1 | Below the study levels |
| MCCURTAIN CO. RWD #1 | OK3004806 | 3,842 | Surface water purchased | 1 | Below the study levels |
| MCCURTAIN CO. RWD #7 | OK3004801 | 1,847 | Surface water purchased | 2 | Below the study levels |
| MCCURTAIN CO. RWD #9 | OK3004820 | 999 | Surface water purchased | 1 | Below the study levels |
| MCINTOSH CO. RWD #8 (TEXANNA) | OK1020529 | 3,574 | Surface water | 1 | Below the study levels |
| MIAMI | OK2005813 | 13,704 | Ground water | 4 | Below the study levels |
| MIDWEST CITY | OK1020806 | 55,935 | Surface water | 12 | Below the study levels |
| MOORE | OK2001412 | 55,083 | Surface water purchased | 24 | Below the study levels |
| MURRAY CO RWD # 1 | OK2005012 | 4,800 | Ground water | 1 | Below the study levels |
| MUSKOGEE | OK1021607 | 38,310 | Surface water | 1 | Below the study levels |
| MUSKOGEE CO. RWD #1 (OKTAHA) | OK3005106 | 2,280 | Surface water purchased | 1 | Below the study levels |
| MUSKOGEE CO. RWD #5 | OK3005107 | 4,135 | Surface water purchased | 2 | Below the study levels |
| MUSTANG | OK2000922 | 18,576 | Surface water purchased | 2 | Below the study levels |
| NEWCASTLE | OK2004704 | 7,900 | Surface water purchased | 2 | Below the study levels |
| NICHOLS HILLS | OK2005501 | 4,020 | Ground water | 2 | Below the study levels |
| NOBLE | OK2001411 | 5,750 | Ground water | 5 | Below the study levels |
| NORMAN | OK1020801 | 104,868 | Surface water | 14 | Below the study levels |
| NOWATA MUNICIPAL AUTHORITY | OK1021503 | 3,971 | Surface water | 1 | Below the study levels |
| OKFUSKEE CO. RWD #3 | OK3005401 | 1,823 | Surface water purchased | 1 | Below the study levels |
| OKLA CHRISTIAN UNIVERSITY | OK7005566 | 1,800 | Ground water | 1 | Below the study levels |
| OKLA ORDNANCE WORKS AUTHORITY | OK1021602 | 4,000 | Surface water | 1 | Below the study levels |
| OKLAHOMA CITY | OK1020902 | 644,000 | Surface water | 2 | Below the study levels |
| OKLAHOMA UNIVERSITY | OK3001414 | 34,000 | Surface water purchased | 1 | Below the study levels |
| OKMULGEE | OK1020708 | 13,495 | Surface water | 1 | Below the study levels |
| OSU WATER PLANT | OK1020910 | 13,000 | Surface water | 1 | Below the study levels |
| OTTAWA CO RWD # 4 | OK2005801 | 652 | Ground water | 5 | Below the study levels |
| OWASSO | OK3007218 | 23,000 | Surface water purchased | 1 | Below the study levels |
| PAULS VALLEY | OK1010808 | 6,256 | Surface water | 1 | Below the study levels |
| PAWHUSKA | OK1021301 | 3,800 | Surface water | 1 | Below the study levels |
| PERRY WATER & LIGHT DEPT | OK1021206 | 5,230 | Surface water | 1 | Below the study levels |
| PIEDMONT MUNICPAL AUTHORITY | OK2000909 | 7,542 | Surface water purchased | 3 | Below the study levels |
| PITTSBURG CO. RWD #11 (KIOWA) | OK3006105 | 790 | Surface water purchased | 1 | Below the study levels |
| PITTSBURG CO. RWD #16 | OK3006106 | 1,268 | Surface water purchased | 1 | Below the study levels |
| PONCA CITY MUN WATER | OK1021202 | 27,155 | Surface water | 1 | Reached a study level |
| PONTOTOC CO RWD # 7 | OK3006215 | 4,863 | Ground water purchased | 1 | Below the study levels |
| PONTOTOC CO RWD # 8 | OK2006215 | 4,250 | Ground water | 1 | Below the study levels |
| PORUM PWA | OK1020302 | 5,000 | Surface water | 1 | Below the study levels |
| POTTAWATOMIE CO. RWD #3 (DALE PLANT) | 061020808 | 5,780 | Ground water | 1 | Below the study levels |
| PURCELL | OK2004701 | 6,693 | Ground water | 1 | Below the study levels |
| PUSHMATAHA CO. RWD #3 | OK1010318 | 4,825 | Surface water | 1 | Below the study levels |
| ROGERS CO RWD # 3 COT STA | OK3006650 | 10,750 | Surface water purchased | 1 | Below the study levels |
| ROGERS CO RWD # 3 LAKE PLANT | OK1021513 | 10,470 | Surface water | 1 | Below the study levels |
| ROGERS CO RWD # 4 | OK1021506 | 7,725 | Surface water | 1 | Below the study levels |
| ROGERS CO RWD # 5 | OK1021507 | 11,782 | Surface water | 1 | Below the study levels |
| ROGERS CO RWD # 8 | OK3006606 | 3,375 | Surface water purchased | 1 | Below the study levels |
| SAND SPRINGS | OK1020420 | 28,774 | Surface water | 1 | Below the study levels |
| SAPULPA | OK1020404 | 19,702 | Surface water | 1 | Below the study levels |
| SAYRE | OK2000508 | 4,375 | Ground water | 1 | Below the study levels |
| SEMINOLE | OK2006720 | 6,899 | Ground water | 17 | Below the study levels |
| SEQUOYAH CO. WATER ASSOCIATION | OK1020210 | 13,460 | Surface water | 1 | Below the study levels |
| SHAWNEE MUNICIPAL AUTHORITY | OK1020504 | 29,990 | Surface water | 1 | Below the study levels |
| SKIATOOK PWA | OK1021313 | 8,110 | Surface water | 1 | Below the study levels |
| SOUTHERN OKLA WATER CORP | OK1010830 | 11,250 | Surface water | 11 | Below the study levels |
| STEPHENS CO RWD #5 | OK2006969 | 6,426 | Surface water purchased | 4 | Below the study levels |
| STILLWATER WATER PLANT | OK1021220 | 53,000 | Surface water | 1 | Reached a study level |
| SULPHUR | OK2005001 | 4,929 | Ground water | 1 | Below the study levels |
| TAHLEQUAH PWA | OK1021701 | 14,458 | Surface water | 2 | Below the study levels |
| TECUMSEH UTILITY AUTHORITY | OK1020506 | 6,098 | Surface water | 1 | Below the study levels |
| TINKER AFB BIO-ENV ENG | OK2005508 | 24,645 | Ground water | 14 | Below the study levels |
| TRI-COUNTY RWD #2 | OK2006362 | 5,172 | Ground water | 3 | Reached a study level |
| TULSA | OK1020418 | 413,000 | Surface water | 2 | Below the study levels |
| TUTTLE | OK2002608 | 4,500 | Ground water | 3 | Below the study levels |
| WAGONER CO. RWD #4 | OK1021529 | 25,792 | Surface water | 1 | Reached a study level |
| WAGONER CO. RWD #5 | OK1021528 | 4,251 | Surface water | 1 | Reached a study level |
| WAGONER CO. RWD #9 | OK1021527 | 4,363 | Surface water | 1 | Below the study levels |
| WASHINGTON CO RWD #3 (NEW,#1) | OK1021418 | 25,375 | Surface water | 1 | Below the study levels |
| WATONGA | OK2000602 | 2,816 | Ground water | 2 | Below the study levels |
| WEATHERFORD | OK2002002 | 10,833 | Ground water | 2 | Below the study levels |
| WEWOKA PUBLIC WORKS AUTHORITY | OK1020510 | 3,450 | Surface water | 1 | Below the study levels |
| WOODWARD | OK2007701 | 15,000 | Ground water | 3 | Below the study levels |
| YUKON | OK2000910 | 22,498 | Surface water purchased | 1 | Below the study levels |
How the count works
What is included
Each active community water system with complete monitoring is counted once, even if it is linked with several ZIP codes. Private wells are excluded, and UCMR 5 did not comprehensively monitor every small system. This page does not apply Oklahoma's state-specific standards or determine compliance. Use the official state or territory drinking-water program for current regulatory information.