Nevada Drinking Water Compliance Records
195 water systems serving 3,121,873 people. 4,873 historical EPA violation records in the Q2 2026 snapshot.
TapScore Compliance-History Grades
A
112
57%
B
38
19%
C
31
16%
D
8
4%
F
6
3%
195
Water Systems
3,121,873
Population Served
4,873
Historical Records
563
Health-Based (All Years)
Systems With the Most Recent EPA Records
ROSEMOUNT WATER CO
54 served210 historical records120 recent
F
CARSON RIVER ESTATES
105 served209 historical records90 recent
D
OLD RIVER WATER COMPANY
300 served143 historical records62 recent
D
TOWN OF MINDEN
3,500 served63 historical records49 recent
C
PIOCHE PUBLIC UTILITIES
700 served51 historical records39 recent
C
PRIMM VALLEY CASINO RESORTS
7,000 served95 historical records27 recent
F
ELY MUNICIPAL WATER DEPARTMENT
5,000 served122 historical records26 recent
C
CALIENTE PUBLIC UTILITIES
1,100 served27 historical records24 recent
C
SHOSHONE ESTATES WATER CO INC
240 served93 historical records23 recent
F
BEATTY WATER AND SANITATION DISTRICT
1,024 served44 historical records22 recent
C
Large Systems With No Recent Records
LAS VEGAS VALLEY WATER DISTRICT
1,539,277 served23 historical records
A
TRUCKEE MEADOWS WATER AUTHORITY
442,000 served0 historical records
A
NORTH LAS VEGAS UTILITIES
376,515 served0 historical records
A
HENDERSON CITY OF
336,534 served2 historical records
A
VIRGIN VALLEY WATER DISTRICT
26,000 served461 historical records
A
SUN VALLEY GID
17,000 served0 historical records
A
DAYTON VALLEY WATER SYSTEM
16,000 served1 historical record
A
BOULDER CITY
15,000 served1 historical record
A
GREAT BASIN WATER COMPANY
12,255 served1 historical record
A
GREAT BASIN WATER CO SPRING CREEK
9,340 served49 historical records
A
Largest Water Systems in Nevada
| Water System | Grade | Population | Historical Records |
|---|---|---|---|
| LAS VEGAS VALLEY WATER DISTRICT | A | 1,539,277 | 23 |
| TRUCKEE MEADOWS WATER AUTHORITY | A | 442,000 | 0 |
| NORTH LAS VEGAS UTILITIES | A | 376,515 | 0 |
| HENDERSON CITY OF | A | 336,534 | 2 |
| CARSON CITY PUBLIC WORKS | B | 59,000 | 56 |
| VIRGIN VALLEY WATER DISTRICT | A | 26,000 | 461 |
| FERNLEY PUBLIC WORKS | C | 23,064 | 94 |
| ELKO CITY OF | C | 23,000 | 8 |
| NELLIS AIR FORCE BASE | C | 19,081 | 6 |
| SUN VALLEY GID | A | 17,000 | 0 |
| DAYTON VALLEY WATER SYSTEM | A | 16,000 | 1 |
| BOULDER CITY | A | 15,000 | 1 |
| GREAT BASIN WATER COMPANY | A | 12,255 | 1 |
| GARDNERVILLE RANCHOS GID | B | 11,300 | 17 |
| GREAT BASIN WATER CO COLD SPRINGS | C | 9,910 | 2 |
| GREAT BASIN WATER CO SPRING CREEK | A | 9,340 | 49 |
| INCLINE VILLAGE GID | A | 9,313 | 0 |
| FALLON CITY OF | A | 9,184 | 39 |
| BIG BEND WATER DISTRICT | A | 9,000 | 5 |
| WINNEMUCCA CITY OF | A | 8,518 | 3 |
Contaminants in Nevada
Lead in NevadaArsenic in NevadaNitrate in NevadaFluoride in NevadaPFOS in NevadaPFOA in NevadaTHMs in NevadaHAA5 in Nevada
Cities in Nevada
LAS VEGAS(36)RENO(22)SPARKS(3)NORTH LAS VEGAS(1)HENDERSON(6)CARSON CITY(4)MESQUITE(1)ELKO(6)FERNLEY(1)PAHRUMP(15)NELLIS AFB(1)GARDNERVILLE(6)SUN VALLEY(1)BOULDER CITY(4)DAYTON(1)MOUNDHOUSE(1)MINDEN(11)FALLON(6)SPRING CREEK(3)GARDNERVILLE RANCHOS(1)WINNEMUCCA(5)INCLINE VILLAGE(1)LAUGHLIN(1)MOAPA(2)OVERTON(1)YERINGTON(2)ELY(1)WEST WENDOVER(1)BATTLE MOUNTAIN(2)STATELINE(1)KINGSBURY(1)HAWTHORNE(4)LOVELOCK(2)BATTLE MOUNTIAN(1)SILVER SPRINGS(1)FALLON NAVAL AIR STATION(1)TONOPAH(1)ZEPHYR COVE(3)CARLIN(1)MCGILL(2)STAGECOACH(1)WELLINGTON(1)ROUND MOUNTAIN(2)VIRGINA CITY(1)VIRGINIA CITY(1)WELLS(1)SKYLAND(1)JACKPOT(1)CALIENTE(1)KYLE CANYON(1)BEATTY(1)GLENBROOK(1)EUREKA(4)PINE GROVE(1)INDIAN SPRINGS(1)ALAMO(1)PANACA(1)PIOCHE(2)SEARCHLIGHT(1)BOULDER(1)AUSTIN(2)JEAN(1)GERLACH(2)BLUE DIAMOND(1)GOLDFIELD(2)RUTH(1)GABBS(1)GARDEN GROVE(1)EMPIRE(1)SHERIDAN(1)MT CHARLESTON(1)MONTELLO(1)GOLCONDA(1)MCDERMITT(1)OROVADA(1)JARBIDGE(1)IMLAY(1)LAMOILLE(1)PASADENA(1)HOLBROOK JUNCTION(1)COLD CREEK(1)LUNING(1)MINA(1)PHOENIX(1)GRAEAGLE(1)PLEASANT VALLEY(1)SANDY VALLEY(1)VALMY(1)BAKER(1)SOUTH JORDAN(1)VERDI(1)CASELTON(1)STOCKTON(1)MILL CITY(1)PALM GARDENS(1)HARRIS SPRINGS(1)TOPAZ(1)MANHATTAN(1)MOUNTAIN CITY(1)