Utah water quality
Utah has 1,191 active public water systems (2,314 on file total), 551 of them graded by TapGraded.
Grade distribution
Biggest water systems
SALT LAKE CITY WATER SYSTEM
SALT LAKE CITY, UT · 383,612 served
GRANGER-HUNTER IMPROVEMENT DISTRICT
SALT LAKE CITY, UT · 121,083 served
WEST JORDAN CITY WATER SYSTEM
WEST JORDAN, UT · 117,025 served
PROVO CITY
PROVO, UT · 116,288 served
ST GEORGE CITY WATER SYSTEM
ST GEORGE CITY, UT · 105,240 served
SANDY CITY WATER SYSTEM
LEHI, UT · 99,750 served
JORDAN VALLEY WCD
WEST JORDAN, UT · 99,335 served
OREM CITY WATER SYSTEM
OREM, UT · 98,129 served
LEHI CITY
LEHI, UT · 93,446 served
SOUTH JORDAN CITY
SOUTH JORDAN, UT · 89,704 served
Lowest-graded systems
Active, graded systems serving at least 10,000 people, ordered by lowest Tap Grade first.
SMITHFIELD CITY
SMITHFIELD, UT · 10,223 served
SOUTH DAVIS WATER DISTRICT
BOUNTIFUL, UT · 10,565 served
NORTH SALT LAKE CITY WATER SYSTEM
NORTH SALT LAKE, UT · 18,655 served
BOUNTIFUL CITY WATER SYSTEM
BOUNTIFUL, UT · 37,500 served
UNIVERSITY OF UTAH
SANDY, UT · 57,080 served
MURRAY CITY WATER SYSTEM
WEST JORDAN, UT · 38,723 served
SALT LAKE CITY WATER SYSTEM
SALT LAKE CITY, UT · 383,612 served
CLEARFIELD CITY WATER SYSTEM
BRIGHAM CITY, UT · 33,540 served
PLEASANT GROVE CITY
OREM, UT · 40,000 served
CEDAR CITY WATERWORKS
CEDAR CITY, UT · 39,670 served
Cities in Utah
Source: EPA SDWIS/ECHO · Data as of 2026Q2