Alabama water quality
Alabama has 626 active public water systems (1,865 on file total), 546 of them graded by TapGraded.
Grade distribution
Biggest water systems
CENTRAL ALABAMA WATER SYSTEM
BIRMINGHAM, AL · 585,000 served
HUNTSVILLE UTILITIES WATER DEPT.
HUNTSVILLE, AL · 310,107 served
MOBILE, BD. OF W&S COMM. OF THE CITY OF
MOBILE, AL · 279,000 served
MONTGOMERY WW&SSB, CITY OF
MONTGOMERY, AL · 276,000 served
TUSCALOOSA WATER & SEWER
TUSCALOOSA, AL · 166,524 served
MADISON COUNTY WATER DEPARTMENT
HUNTSVILLE, AL · 119,100 served
DOTHAN UTILITIES, CITY OF
DOTHAN, AL · 97,146 served
LIMESTONE COUNTY WATER & SEWER AUTH.
ATHENS, AL · 90,900 served
BESSEMER WATER SERVICE
BESSEMER, AL · 86,091 served
FLORENCE WATER DEPARTMENT, CITY OF
FLORENCE, AL · 77,766 served
Lowest-graded systems
Active, graded systems serving at least 10,000 people, ordered by lowest Tap Grade first.
PRICHARD WATER WORKS BOARD
PRICHARD, AL · 29,190 served
BEULAH UTILITIES DISTRICT
VALLEY, AL · 10,389 served
HOLTVILLE WATER SYSTEM
DEATSVILLE, AL · 12,600 served
DEKALB-JACKSON WATER SUPPLY DISTRICT
IDER, AL · 32,421 served
MONTEVALLO WATER WORKS & SEWER BOARD
MONTEVALLO, AL · 10,746 served
OXFORD WATER WORKS & SEWER BOARD
OXFORD, AL · 31,239 served
SARALAND, BD OF W&S COMMISSIONERS
SARALAND, AL · 13,827 served
SHEFFIELD UTILITIES, CITY OF SHEFFIELD
SHEFFIELD, AL · 13,758 served
ALABASTER WATER DEPARTMENT, CITY OF
ALABASTER, AL · 40,986 served
WARRIOR RIVER WATER AUTHORITY
BESSEMER, AL · 38,700 served
Cities in Alabama
Source: EPA SDWIS/ECHO · Data as of 2026Q2