State rankings
Missouri water-system rankings
Lowest-scoring systems in Missouri
Ranked lowest score first. Population shown for context.
1 ST JAMES PWS ST JAMES, MO · ~3,935 served 34 2 OCALA HEIGHTS S/D DES PERES, MO · ~1,045 served 55 3 CAMDENTON PWS CAMDENTON, MO · ~3,960 served 60 4 ST ROBERT PWS ST ROBERT, MO · ~5,192 served 67 5 CS HARRISBURG UTILITY COMPANY DES PERES, MO · ~1,759 served 70 6 LAMAR PWS LAMAR, MO · ~4,500 served 78 7 COLE COUNTY PWSD 1 JEFFERSON CITY, MO · ~16,548 served 81 8 CS WINCHESTER WATER COMPANY DES PERES, MO · ~402 served 85 9 ST PETERS PWS ST PETERS, MO · ~52,575 served 86 10 SPRINGFIELD PWS SPRINGFIELD, MO · ~210,898 served 90 11 RALLS COUNTY PWSD 1 HANNIBAL, MO · ~7,662 served 90 12 LAKE ROYALE S/D DES PERES, MO · ~5,890 served 91 13 CIRCLE C MHP BEAUFORT, MO · ~75 served 91 14 NORTH KANSAS CITY PWS NORTH KANSAS CITY, MO · ~4,500 served 93 15 SCOTT CITY PWS SCOTT CITY, MO · ~4,653 served 95 16 MONETT PWS MONETT, MO · ~9,027 served 96 17 ST CLAIR PWS ST CLAIR, MO · ~4,700 served 99 18 MO AMERICAN ST LOUIS ST CHARLES COUNTIES CHESTERFIELD, MO · ~1,111,000 served 100 19 KANSAS CITY PWS KANSAS CITY, MO · ~513,800 served 100 20 ST LOUIS CITY PWS ST LOUIS, MO · ~304,709 served 100 21 CITY OF COLUMBIA UTILITIES COLUMBIA, MO · ~126,254 served 100 22 INDEPENDENCE PWS INDEPENDENCE, MO · ~120,000 served 100 23 ST CHARLES COUNTY PWSD 2 O'FALLON, MO · ~100,587 served 100 24 LEES SUMMIT PWS LEES SUMMIT, MO · ~99,400 served 100 25 MO AMERICAN ST JOSEPH ST JOSEPH, MO · ~89,171 served 100
Highest-scoring large systems in Missouri
Systems serving 10,000+ people with the best scores.
1 MO AMERICAN ST LOUIS ST CHARLES COUNTIES CHESTERFIELD, MO · ~1,111,000 served 100 2 KANSAS CITY PWS KANSAS CITY, MO · ~513,800 served 100 3 ST LOUIS CITY PWS ST LOUIS, MO · ~304,709 served 100 4 CITY OF COLUMBIA UTILITIES COLUMBIA, MO · ~126,254 served 100 5 INDEPENDENCE PWS INDEPENDENCE, MO · ~120,000 served 100 6 ST CHARLES COUNTY PWSD 2 O'FALLON, MO · ~100,587 served 100 7 LEES SUMMIT PWS LEES SUMMIT, MO · ~99,400 served 100 8 MO AMERICAN ST JOSEPH ST JOSEPH, MO · ~89,171 served 100
Scores reflect EPA public records (violations, enforcement, PFAS), are system-level, and can’t account for your home’s plumbing. See the methodology.