Rankings

Water systems with the lowest safety scores

Large US community water systems ranked by their PurityRadar 0–100 score — built from EPA violations, enforcement, and PFAS data. Lower means more on the public record.

Largest systems with the lowest scores

Systems serving 50,000+ people, ranked lowest score first.

1 CITY OF ABILENE ABILENE, TX · ~125,182 served 7 2 EMERALD COAST UTILITIES AUTHORITY (ECUA) PENSACOLA, FL · ~242,172 served 9 3 OCALA, CITY OF (2 WTPS) Ocala, FL · ~66,270 served 10 4 ROBESON COUNTY WATER SYSTEM LUMBERTON, NC · ~67,970 served 11 5 CITY OF PFLUGERVILLE PFLUGERVILLE, TX · ~63,464 served 13 6 PORTERVILLE, CITY OF PORTERVILLE, CA · ~63,487 served 19 7 CERES, CITY OF CERES, CA · ~54,513 served 19 8 CITY OF FORT WORTH FORT WORTH, TX · ~955,900 served 21 9 GREENWOOD CPW (2410001) GREENWOOD, SC · ~52,022 served 22 10 CITY OF ORANGE ORANGE, CA · ~120,770 served 26 11 CITY OF GARDEN GROVE GARDEN GROVE, CA · ~174,226 served 28 12 NORTH MIAMI, CITY OF NORTH MIAMI, FL · ~89,349 served 28 13 LAUDERHILL, CITY OF LAUDERHILL, FL · ~55,000 served 29 14 CITY OF PLEASANTON PLEASANTON, CA · ~76,689 served 30 15 LIBERTY UTILITIES - BELLFLOWER-NORWALK DOWNEY, CA · ~72,624 served 30 16 DELRAY BEACH PUBLIC WATER SYSTEM DELRAY BEACH, FL · ~69,754 served 30 17 CITY OF CLOVIS CLOVIS, CA · ~130,130 served 31 18 HIALEAH, CITY OF HIALEAH, FL · ~238,000 served 32 19 FAYETTEVILLE PUBLIC WORKS COMM FAYETTEVILLE, NC · ~215,590 served 32 20 PEMBROKE PINES, CITY OF PEMBROKE PINES, FL · ~187,459 served 32

Rankings by state

The lowest- and highest-scoring systems in each state.

Alabama Alaska Arizona Arkansas California Colorado Connecticut Delaware Florida Georgia Hawaii Idaho Illinois Indiana Iowa Kansas Kentucky Louisiana Maine Maryland Massachusetts Michigan Minnesota Mississippi Missouri Montana Nebraska Nevada New Hampshire New Jersey New Mexico New York North Carolina North Dakota Ohio Oklahoma Oregon Pennsylvania Rhode Island South Carolina South Dakota Tennessee Texas Utah Vermont Virginia Washington West Virginia Wisconsin Wyoming District of Columbia Puerto Rico Guam U.S. Virgin Islands American Samoa Northern Mariana Islands

Scores are system-level and reflect active health-based violations and PFAS exceedances in EPA public records — not a measurement of your tap. See the methodology, or check your address.