Oklahoma County Water Quality Reports

Adair County, OK: 10 Health Violations — 65/100 (2026)

2026 report: Adair County, OK scores 65/100 (Grade C). 4 ZIP codes analyzed. 58 EPA violations found. Free report with contaminant data and filter picks.

Alfalfa County, OK: 12 Health Violations — 80/100 (2026)

2026 report: Alfalfa County, OK scores 80/100 (Grade B). 8 ZIP codes analyzed. 68 EPA violations found. Free report with contaminant data and filter picks.

Atoka County, OK: 102 Health Violations — 68/100 (2026)

2026 report: Atoka County, OK scores 68/100 (Grade C). 5 ZIP codes analyzed. 140 EPA violations found. Free report with contaminant data and filter picks.

Beaver County, OK: 2 Health Violations — 61/100 (2026)

2026 report: Beaver County, OK scores 61/100 (Grade C). 6 ZIP codes analyzed. 60 EPA violations found. Free report with contaminant data and filter picks.

Beckham County, OK: 6 Health Violations — 89/100 (2026)

2026 report: Beckham County, OK scores 89/100 (Grade A). 6 ZIP codes analyzed. 46 EPA violations found. Free report with contaminant data and filter picks.

Blaine County, OK: 14 Health Violations — 81/100 (2026)

2026 report: Blaine County, OK scores 81/100 (Grade B). 9 ZIP codes analyzed. 82 EPA violations found. Free report with contaminant data and filter picks.

Bryan County, OK: 27 Health Violations — 83/100 (2026)

2026 report: Bryan County, OK scores 83/100 (Grade B). 15 ZIP codes analyzed. 80 EPA violations found. Free report with contaminant data and filter picks.

Caddo County, OK: 70 Health Violations — 82/100 (2026)

2026 report: Caddo County, OK scores 82/100 (Grade B). 13 ZIP codes analyzed. 148 EPA violations found. Free report with contaminant data and filter picks.

Canadian County, OK: 84 Health Violations — 70/100 (2026)

2026 report: Canadian County, OK scores 70/100 (Grade B). 10 ZIP codes analyzed. 144 EPA violations found. Free report with contaminant data and filter ...

Carter County, OK: 149 Health Violations — 72/100 (2026)

2026 report: Carter County, OK scores 72/100 (Grade B). 18 ZIP codes analyzed. 447 EPA violations found. Free report with contaminant data and filter pi...

Cherokee County, OK: 31 Health Violations — 63/100 (2026)

2026 report: Cherokee County, OK scores 63/100 (Grade C). 8 ZIP codes analyzed. 198 EPA violations found. Free report with contaminant data and filter p...

Choctaw County, OK: 97 Health Violations — 72/100 (2026)

2026 report: Choctaw County, OK scores 72/100 (Grade B). 9 ZIP codes analyzed. 153 EPA violations found. Free report with contaminant data and filter pi...

Cimarron County, OK: 1 Health Violation — 63/100 (2026)

2026 report: Cimarron County, OK scores 63/100 (Grade C). 4 ZIP codes analyzed. 13 EPA violations found. Free report with contaminant data and filter pi...

Cleveland County, OK: 32 Health Violations — 82/100 (2026)

2026 report: Cleveland County, OK scores 82/100 (Grade B). 12 ZIP codes analyzed. 255 EPA violations found. Free report with contaminant data and filter...

Coal County, OK: 15 Health Violations — 87/100 (2026)

2026 report: Coal County, OK scores 87/100 (Grade A). 6 ZIP codes analyzed. 39 EPA violations found. Free report with contaminant data and filter picks.

Comanche County, OK: 40 Health Violations — 79/100 (2026)

2026 report: Comanche County, OK scores 79/100 (Grade B). 17 ZIP codes analyzed. 155 EPA violations found. Free report with contaminant data and filter ...

Cotton County, OK: 47 Health Violations — 70/100 (2026)

2026 report: Cotton County, OK scores 70/100 (Grade B). 4 ZIP codes analyzed. 81 EPA violations found. Free report with contaminant data and filter picks.

Craig County, OK: 24 Health Violations — 73/100 (2026)

2026 report: Craig County, OK scores 73/100 (Grade B). 4 ZIP codes analyzed. 56 EPA violations found. Free report with contaminant data and filter picks.

Creek County, OK: 20 Health Violations — 82/100 (2026)

2026 report: Creek County, OK scores 82/100 (Grade B). 13 ZIP codes analyzed. 99 EPA violations found. Free report with contaminant data and filter picks.

Custer County, OK: 8 Health Violations — 82/100 (2026)

2026 report: Custer County, OK scores 82/100 (Grade B). 7 ZIP codes analyzed. 76 EPA violations found. Free report with contaminant data and filter picks.

Delaware County, OK: 33 Health Violations — 62/100 (2026)

2026 report: Delaware County, OK scores 62/100 (Grade C). 10 ZIP codes analyzed. 224 EPA violations found. Free report with contaminant data and filter ...

Dewey County, OK: Lead Above EPA Limits — 81/100 (2026)

2026 report: Dewey County, OK scores 81/100 (Grade B). 8 ZIP codes analyzed. 52 EPA violations found. Lead above EPA limits. Free report with contaminan...

Ellis County, OK: 4 Health Violations — 73/100 (2026)

2026 report: Ellis County, OK scores 73/100 (Grade B). 5 ZIP codes analyzed. 53 EPA violations found. Free report with contaminant data and filter picks.

Garfield County, OK: 22 Health Violations — 86/100 (2026)

2026 report: Garfield County, OK scores 86/100 (Grade A). 18 ZIP codes analyzed. 167 EPA violations found. Free report with contaminant data and filter ...

Garvin County, OK: 55 Health Violations — 80/100 (2026)

2026 report: Garvin County, OK scores 80/100 (Grade B). 8 ZIP codes analyzed. 112 EPA violations found. Free report with contaminant data and filter picks.

Grady County, OK: Lead Above EPA Limits — 75/100 (2026)

2026 report: Grady County, OK scores 75/100 (Grade B). 10 ZIP codes analyzed. 171 EPA violations found. Lead above EPA limits. Free report with contamin...

Grant County, OK: 21 Health Violations — 85/100 (2026)

2026 report: Grant County, OK scores 85/100 (Grade A). 8 ZIP codes analyzed. 178 EPA violations found. Free report with contaminant data and filter picks.

Greer County, OK: 4 Health Violations — 84/100 (2026)

2026 report: Greer County, OK scores 84/100 (Grade B). 4 ZIP codes analyzed. 57 EPA violations found. Free report with contaminant data and filter picks.

Harmon County, OK: 17 Health Violations — 65/100 (2026)

2026 report: Harmon County, OK scores 65/100 (Grade C). 1 ZIP code analyzed. 29 EPA violations found. Free report with contaminant data and filter picks.

Harper County, OK: 49 Violations — 80/100 (2026)

2026 report: Harper County, OK scores 80/100 (Grade B). 3 ZIP codes analyzed. 49 EPA violations found. Free report with contaminant data and filter picks.

Haskell County, OK: 23 Health Violations — 70/100 (2026)

2026 report: Haskell County, OK scores 70/100 (Grade B). 4 ZIP codes analyzed. 31 EPA violations found. Free report with contaminant data and filter picks.

Hughes County, OK: 43 Health Violations — 77/100 (2026)

2026 report: Hughes County, OK scores 77/100 (Grade B). 7 ZIP codes analyzed. 90 EPA violations found. Free report with contaminant data and filter picks.

Jackson County, OK: 94 Health Violations — 69/100 (2026)

2026 report: Jackson County, OK scores 69/100 (Grade C). 10 ZIP codes analyzed. 218 EPA violations found. Free report with contaminant data and filter p...

Jefferson County, OK: 59 Health Violations — 72/100 (2026)

2026 report: Jefferson County, OK scores 72/100 (Grade B). 6 ZIP codes analyzed. 70 EPA violations found. Free report with contaminant data and filter p...

Johnston County, OK: 15 Health Violations — 90/100 (2026)

2026 report: Johnston County, OK scores 90/100 (Grade A). 8 ZIP codes analyzed. 41 EPA violations found. Free report with contaminant data and filter pi...

Kay County, OK: 31 Health Violations — 83/100 (2026)

2026 report: Kay County, OK scores 83/100 (Grade B). 8 ZIP codes analyzed. 78 EPA violations found. Free report with contaminant data and filter picks.

Kingfisher County, OK: 14 Health Violations — 84/100 (2026)

2026 report: Kingfisher County, OK scores 84/100 (Grade B). 6 ZIP codes analyzed. 49 EPA violations found. Free report with contaminant data and filter ...

Kiowa County, OK: 35 Health Violations — 86/100 (2026)

2026 report: Kiowa County, OK scores 86/100 (Grade A). 7 ZIP codes analyzed. 70 EPA violations found. Free report with contaminant data and filter picks.

Latimer County, OK: 24 Health Violations — 66/100 (2026)

2026 report: Latimer County, OK scores 66/100 (Grade C). 4 ZIP codes analyzed. 49 EPA violations found. Free report with contaminant data and filter picks.

Le Flore County, OK: 176 Health Violations — 71/100 (2026)

2026 report: Le Flore County, OK scores 71/100 (Grade B). 21 ZIP codes analyzed. 377 EPA violations found. Free report with contaminant data and filter ...

Lincoln County, OK: Lead Above EPA Limits — 79/100 (2026)

2026 report: Lincoln County, OK scores 79/100 (Grade B). 10 ZIP codes analyzed. 105 EPA violations found. Lead above EPA limits. Free report with contam...

Logan County, OK: 11 Health Violations — 86/100 (2026)

2026 report: Logan County, OK scores 86/100 (Grade A). 8 ZIP codes analyzed. 46 EPA violations found. Free report with contaminant data and filter picks.

Love County, OK: 12 Violations — 94/100 (2026)

2026 report: Love County, OK scores 94/100 (Grade A). 4 ZIP codes analyzed. 12 EPA violations found. Free report with contaminant data and filter picks.

Major County, OK: 41 Health Violations — 76/100 (2026)

2026 report: Major County, OK scores 76/100 (Grade B). 5 ZIP codes analyzed. 79 EPA violations found. Free report with contaminant data and filter picks.

Marshall County, OK: 25 Health Violations — 79/100 (2026)

2026 report: Marshall County, OK scores 79/100 (Grade B). 3 ZIP codes analyzed. 33 EPA violations found. Free report with contaminant data and filter pi...

Mayes County, OK: Lead Above EPA Limits — 69/100 (2026)

2026 report: Mayes County, OK scores 69/100 (Grade C). 12 ZIP codes analyzed. 108 EPA violations found. Lead above EPA limits. Free report with contamin...

McClain County, OK: 6 Health Violations — 92/100 (2026)

2026 report: McClain County, OK scores 92/100 (Grade A). 7 ZIP codes analyzed. 39 EPA violations found. Free report with contaminant data and filter picks.

McCurtain County, OK: 78 Health Violations — 69/100 (2026)

2026 report: McCurtain County, OK scores 69/100 (Grade C). 14 ZIP codes analyzed. 150 EPA violations found. Free report with contaminant data and filter...

McIntosh County, OK: 75 Health Violations — 73/100 (2026)

2026 report: McIntosh County, OK scores 73/100 (Grade B). 5 ZIP codes analyzed. 113 EPA violations found. Free report with contaminant data and filter p...

Murray County, OK: 16 Health Violations — 82/100 (2026)

2026 report: Murray County, OK scores 82/100 (Grade B). 6 ZIP codes analyzed. 35 EPA violations found. Free report with contaminant data and filter picks.

Muskogee County, OK: 171 Health Violations — 70/100 (2026)

2026 report: Muskogee County, OK scores 70/100 (Grade B). 17 ZIP codes analyzed. 268 EPA violations found. Free report with contaminant data and filter ...

Noble County, OK: 37 Health Violations — 79/100 (2026)

2026 report: Noble County, OK scores 79/100 (Grade B). 5 ZIP codes analyzed. 236 EPA violations found. Free report with contaminant data and filter picks.

Nowata County, OK: 31 Health Violations — 73/100 (2026)

2026 report: Nowata County, OK scores 73/100 (Grade B). 4 ZIP codes analyzed. 151 EPA violations found. Free report with contaminant data and filter picks.

Okfuskee County, OK: 21 Health Violations — 80/100 (2026)

2026 report: Okfuskee County, OK scores 80/100 (Grade B). 5 ZIP codes analyzed. 52 EPA violations found. Free report with contaminant data and filter pi...

Oklahoma County, OK: 18 Health Violations — 90/100 (2026)

2026 report: Oklahoma County, OK scores 90/100 (Grade A). 89 ZIP codes analyzed. 243 EPA violations found. Free report with contaminant data and filter ...

Okmulgee County, OK: 111 Health Violations — 71/100 (2026)

2026 report: Okmulgee County, OK scores 71/100 (Grade B). 8 ZIP codes analyzed. 193 EPA violations found. Free report with contaminant data and filter p...

Osage County, OK: 262 Health Violations — 75/100 (2026)

2026 report: Osage County, OK scores 75/100 (Grade B). 11 ZIP codes analyzed. 657 EPA violations found. Free report with contaminant data and filter picks.

Ottawa County, OK: 24 Health Violations — 80/100 (2026)

2026 report: Ottawa County, OK scores 80/100 (Grade B). 11 ZIP codes analyzed. 144 EPA violations found. Free report with contaminant data and filter pi...

Pawnee County, OK: 72 Health Violations — 80/100 (2026)

2026 report: Pawnee County, OK scores 80/100 (Grade B). 7 ZIP codes analyzed. 144 EPA violations found. Free report with contaminant data and filter picks.

Payne County, OK: 63 Health Violations — 78/100 (2026)

2026 report: Payne County, OK scores 78/100 (Grade B). 10 ZIP codes analyzed. 123 EPA violations found. Free report with contaminant data and filter picks.

Pittsburg County, OK: 169 Health Violations — 70/100 (2026)

2026 report: Pittsburg County, OK scores 70/100 (Grade B). 17 ZIP codes analyzed. 267 EPA violations found. Free report with contaminant data and filter...

Pontotoc County, OK: 8 Health Violations — 89/100 (2026)

2026 report: Pontotoc County, OK scores 89/100 (Grade A). 8 ZIP codes analyzed. 42 EPA violations found. Free report with contaminant data and filter pi...

Pottawatomie County, OK: Lead Above EPA Limits — 67/100

2026 report: Pottawatomie County, OK scores 67/100 (Grade C). 11 ZIP codes analyzed. 269 EPA violations found. Lead above EPA limits. Free report with c...

Pushmataha County, OK: 114 Health Violations — 63/100 (2026)

2026 report: Pushmataha County, OK scores 63/100 (Grade C). 9 ZIP codes analyzed. 140 EPA violations found. Free report with contaminant data and filter...

Roger Mills County, OK: 8 Health Violations — 73/100 (2026)

2026 report: Roger Mills County, OK scores 73/100 (Grade B). 6 ZIP codes analyzed. 46 EPA violations found. Free report with contaminant data and filter...

Rogers County, OK: 27 Health Violations — 81/100 (2026)

2026 report: Rogers County, OK scores 81/100 (Grade B). 10 ZIP codes analyzed. 88 EPA violations found. Free report with contaminant data and filter picks.

Seminole County, OK: 119 Health Violations — 86/100 (2026)

2026 report: Seminole County, OK scores 86/100 (Grade A). 8 ZIP codes analyzed. 202 EPA violations found. Free report with contaminant data and filter p...

Sequoyah County, OK: 22 Health Violations — 64/100 (2026)

2026 report: Sequoyah County, OK scores 64/100 (Grade C). 7 ZIP codes analyzed. 93 EPA violations found. Free report with contaminant data and filter pi...

Stephens County, OK: 32 Health Violations — 71/100 (2026)

2026 report: Stephens County, OK scores 71/100 (Grade B). 7 ZIP codes analyzed. 70 EPA violations found. Free report with contaminant data and filter pi...

Texas County, OK: 2 Health Violations — 76/100 (2026)

2026 report: Texas County, OK scores 76/100 (Grade B). 7 ZIP codes analyzed. 34 EPA violations found. Free report with contaminant data and filter picks.

Tillman County, OK: 70 Health Violations — 72/100 (2026)

2026 report: Tillman County, OK scores 72/100 (Grade B). 6 ZIP codes analyzed. 104 EPA violations found. Free report with contaminant data and filter pi...

Tulsa County, OK: 94 Health Violations — 86/100 (2026)

2026 report: Tulsa County, OK scores 86/100 (Grade A). 63 ZIP codes analyzed. 572 EPA violations found. Free report with contaminant data and filter picks.

Wagoner County, OK: 212 Health Violations — 65/100 (2026)

2026 report: Wagoner County, OK scores 65/100 (Grade C). 9 ZIP codes analyzed. 326 EPA violations found. Free report with contaminant data and filter pi...

Washington County, OK: 128 Health Violations — 67/100 (2026)

2026 report: Washington County, OK scores 67/100 (Grade C). 8 ZIP codes analyzed. 279 EPA violations found. Free report with contaminant data and filter...

Washita County, OK: Lead Above EPA Limits — 83/100 (2026)

2026 report: Washita County, OK scores 83/100 (Grade B). 10 ZIP codes analyzed. 77 EPA violations found. Lead above EPA limits. Free report with contami...

Woods County, OK: 3 Health Violations — 88/100 (2026)

2026 report: Woods County, OK scores 88/100 (Grade A). 5 ZIP codes analyzed. 33 EPA violations found. Free report with contaminant data and filter picks.

Woodward County, OK: Lead Above EPA Limits — 82/100 (2026)

2026 report: Woodward County, OK scores 82/100 (Grade B). 5 ZIP codes analyzed. 95 EPA violations found. Lead above EPA limits. Free report with contami...