State rankings

Oklahoma water-system rankings

Community water systems in Oklahoma ranked by PurityRadar safety score — from EPA violations, enforcement, and PFAS data.

Lowest-scoring systems in Oklahoma

Ranked lowest score first. Population shown for context.

1 BROKEN ARROW MUNICIPAL AUTHORITY BROKEN ARROW, OK · ~116,330 served 46 2 KAY CO RWD #5 (DALE WATER CORP) NEWKIRK, OK · ~765 served 60 3 WAGONER CO. RWD #5 COWETA, OK · ~4,251 served 61 4 WAGONER CO. RWD #4 BROKEN ARROW, OK · ~25,792 served 63 5 BETHANY BETHANY, OK · ~20,307 served 67 6 MAYES CO RWD # 2 CHOUTEAU, OK · ~6,280 served 67 7 TRI-COUNTY RWD #2 EARLSBORO, OK · ~5,172 served 67 8 PONCA CITY MUN WATER PONCA CITY, OK · ~27,155 served 73 9 STILLWATER UTILITIES AUTHORITY STILLWATER, OK · ~53,000 served 78 10 NOWATA MUNICIPAL AUTHORITY NOWATA, OK · ~3,971 served 80 11 OKLA ORDNANCE WORKS AUTHORITY PRYOR, OK · ~4,000 served 81 12 EDMOND PWA EDMOND, OK · ~79,408 served 87 13 LOGAN CO RWD #1 GUTHRIE, OK · ~8,907 served 90 14 NOBLE UTILITIES AUTHORITY NOBLE, OK · ~5,750 served 97 15 OKLAHOMA CITY OKLAHOMA CITY, OK · ~644,000 served 100 16 TULSA TULSA, OK · ~413,000 served 100 17 NORMAN UTILITIES AUTHORITY NORMAN, OK · ~104,868 served 100 18 LAWTON LAWTON, OK · ~92,757 served 100 19 MIDWEST CITY MIDWEST CITY, OK · ~55,935 served 100 20 MOORE PUBLIC WORKS AUTHORITY MOORE, OK · ~55,083 served 100 21 ENID ENID, OK · ~49,347 served 100 22 MUSKOGEE MUSKOGEE, OK · ~38,310 served 100 23 BARTLESVILLE BARTLESVILLE, OK · ~34,748 served 100 24 OKLAHOMA UNIVERSITY NORMAN, OK · ~34,000 served 100 25 SHAWNEE MUNICIPAL AUTHORITY SHAWNEE, OK · ~29,990 served 100

Highest-scoring large systems in Oklahoma

Systems serving 10,000+ people with the best scores.

1 OKLAHOMA CITY OKLAHOMA CITY, OK · ~644,000 served 100 2 TULSA TULSA, OK · ~413,000 served 100 3 NORMAN UTILITIES AUTHORITY NORMAN, OK · ~104,868 served 100 4 LAWTON LAWTON, OK · ~92,757 served 100 5 MIDWEST CITY MIDWEST CITY, OK · ~55,935 served 100 6 MOORE PUBLIC WORKS AUTHORITY MOORE, OK · ~55,083 served 100 7 ENID ENID, OK · ~49,347 served 100 8 MUSKOGEE MUSKOGEE, OK · ~38,310 served 100
Oklahoma directory → All states

Scores reflect EPA public records (violations, enforcement, PFAS), are system-level, and can’t account for your home’s plumbing. See the methodology.