Maine water quality

Maine has 1,627 active public water systems (5,779 on file total), 348 of them graded by TapGraded.

Grade distribution

275 (79%)

33 (9%)

21 (6%)

10 (3%)

9 (3%)

Biggest water systems

PORTLAND WATER DISTRICT-GREATER

PORTLAND, ME · 135,068 served

MAINE WATER COMPANY BIDDEFORD SACO DIV

POLAND, ME · 42,508 served

KENNEBUNK, KENNEBUNKPORT & WELLS WD

KENNEBUNK, ME · 35,663 served

BANGOR WATER DISTRICT

BANGOR, ME · 27,298 served

LEWISTON WATER & SEWER DIVISION

LEWISTON, ME · 23,720 served

KENNEBEC WATER DISTRICT

WATERVILLE, ME · 22,060 served

MAINE WATER COMPANY CAMDEN & ROCKLAND

POLAND, ME · 21,315 served

BRUNSWICK/TOPSHAM WATER DISTRICT

TOPSHAM, ME · 18,863 served

AUBURN WATER DISTRICT

LISBON, ME · 17,245 served

KITTERY WATER DISTRICT

KITTERY, ME · 14,478 served

Lowest-graded systems

Active, graded systems serving at least 10,000 people, ordered by lowest Tap Grade first.