Nevada water quality
Nevada has 671 active public water systems (1,524 on file total), 230 of them graded by TapGraded.
Grade distribution
Biggest water systems
LAS VEGAS VALLEY WATER DISTRICT
LAS VEGAS, NV · 1,539,277 served
TRUCKEE MEADOWS WATER AUTHORITY
RENO, NV · 442,000 served
NORTH LAS VEGAS UTILITIES
NORTH LAS VEGAS, NV · 376,515 served
HENDERSON CITY OF
HENDERSON, NV · 336,534 served
CARSON CITY PUBLIC WORKS
CARSON CITY, NV · 59,000 served
ROBINSON CREEK CAMPGROUND
SPARKS, NV · 50,562 served
VIRGIN VALLEY WATER DISTRICT
MESQUITE, NV · 26,000 served
FERNLEY PUBLIC WORKS
FERNLEY, NV · 23,064 served
ELKO CITY OF
ELKO, NV · 23,000 served
VENETIAN PALAZZO
LAS VEGAS, NV · 19,387 served
Lowest-graded systems
Active, graded systems serving at least 10,000 people, ordered by lowest Tap Grade first.
FERNLEY PUBLIC WORKS
FERNLEY, NV · 23,064 served
ELKO CITY OF
ELKO, NV · 23,000 served
TRUCKEE MEADOWS WATER AUTHORITY
RENO, NV · 442,000 served
NELLIS AIR FORCE BASE
NELLIS AFB, NV · 19,081 served
GARDNERVILLE RANCHOS GID
GARDNERVILLE, NV · 11,300 served
CARSON CITY PUBLIC WORKS
CARSON CITY, NV · 59,000 served
GREAT BASIN WATER COMPANY
PAHRUMP, NV · 12,255 served
LAS VEGAS VALLEY WATER DISTRICT
LAS VEGAS, NV · 1,539,277 served
NORTH LAS VEGAS UTILITIES
NORTH LAS VEGAS, NV · 376,515 served
HENDERSON CITY OF
HENDERSON, NV · 336,534 served
Cities in Nevada
Source: EPA SDWIS/ECHO · Data as of 2026Q2