State rankings
Maine water-system rankings
Lowest-scoring systems in Maine
Ranked lowest score first. Population shown for context.
1 SANFORD WATER DISTRICT SANFORD, ME · ~14,328 served 65 2 YARMOUTH WATER DISTRICT YARMOUTH, ME · ~8,000 served 67 3 LISBON WATER DEPARTMENT LISBON, ME · ~6,643 served 82 4 KENNEBEC WATER DISTRICT WATERVILLE, ME · ~22,060 served 85 5 ST. JOHN'S RIVER CLUB UTILITIES GRAY, ME · ~170 served 85 6 HOULTON WATER COMPANY HOULTON, ME · ~4,735 served 87 7 PORTLAND WATER DISTRICT-GREATER PORTLAND, ME · ~135,068 served 100 8 MAINE WATER COMPANY BIDDEFORD SACO DIV POLAND, ME · ~42,508 served 100 9 KENNEBUNK, KENNEBUNKPORT & WELLS WD KENNEBUNK, ME · ~35,663 served 100 10 BANGOR WATER DISTRICT BANGOR, ME · ~27,298 served 100 11 LEWISTON WATER & SEWER DIVISION LEWISTON, ME · ~23,720 served 100 12 MAINE WATER COMPANY CAMDEN & ROCKLAND POLAND, ME · ~21,315 served 100 13 BRUNSWICK/TOPSHAM WATER DISTRICT TOPSHAM, ME · ~18,863 served 100 14 AUBURN WATER DISTRICT LISBON, ME · ~17,245 served 100 15 KITTERY WATER DISTRICT KITTERY, ME · ~14,478 served 100 16 GREATER AUGUSTA UTILITY DISTRICT AUGUSTA, ME · ~13,750 served 100 17 YORK WATER DISTRICT YORK, ME · ~13,675 served 100 18 BATH WATER DISTRICT BATH, ME · ~9,290 served 100 19 GARDINER WATER DISTRICT GARDINER, ME · ~9,000 served 100 20 BREWER WATER DEPARTMENT BREWER, ME · ~8,860 served 100 21 BOOTHBAY REGION WATER DISTRICT BOOTHBAY, ME · ~8,448 served 100 22 OLD TOWN WATER DISTRICT OLD TOWN, ME · ~7,648 served 100 23 PRESQUE ISLE UTILITIES DISTRICT PRESQUE ISLE, ME · ~6,128 served 100 24 MAINE WATER COMPANY SKOWHEGAN DIVISION POLAND, ME · ~6,105 served 100 25 ORONO-VEAZIE WATER DISTRICT ORONO, ME · ~5,793 served 100
Highest-scoring large systems in Maine
Systems serving 10,000+ people with the best scores.
1 PORTLAND WATER DISTRICT-GREATER PORTLAND, ME · ~135,068 served 100 2 MAINE WATER COMPANY BIDDEFORD SACO DIV POLAND, ME · ~42,508 served 100 3 KENNEBUNK, KENNEBUNKPORT & WELLS WD KENNEBUNK, ME · ~35,663 served 100 4 BANGOR WATER DISTRICT BANGOR, ME · ~27,298 served 100 5 LEWISTON WATER & SEWER DIVISION LEWISTON, ME · ~23,720 served 100 6 MAINE WATER COMPANY CAMDEN & ROCKLAND POLAND, ME · ~21,315 served 100 7 BRUNSWICK/TOPSHAM WATER DISTRICT TOPSHAM, ME · ~18,863 served 100 8 AUBURN WATER DISTRICT LISBON, ME · ~17,245 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.