All 37 systems met the sampling requirement for a yearly average. Of those systems, 3 had at least one yearly average above an EPA comparison level and 34 did not.
EPA-based study benchmark: a fixed, unrounded research cutoff used to reproduce EPA’s final UCMR 5 technical-assistance classification based on the April 2024 federal levels. It is not a current federal or state standard. The label does not determine compliance, household exposure, or health risk.
State rules: The labels on this page use fixed research cutoffs based on the April 2024 federal levels. Nevada may use different current standards or guidance. These UCMR 5 results do not determine current federal or state compliance. Find the official Nevada drinking-water program →
Find your water system
A ZIP code finds possible public water systems for an area; it cannot identify the supplier for a specific home. Confirm the provider using a water bill or utility record.
System counts in Nevada
Each count shows how many included water systems had a yearly average above the named EPA comparison level.
| EPA rounding cutoff | Systems above comparison level | Water systems included | Percent |
|---|---|---|---|
| PFOA: 4 ppt level; unrounded average ≥4.05 ppt after applying EPA rounding | 2 | 37 | 5.4% |
| PFOS: 4 ppt level; unrounded average ≥4.05 ppt after applying EPA rounding | 3 | 37 | 8.1% |
| PFHxS: 10 ppt level; unrounded average ≥15 ppt after applying EPA rounding | 1 | 37 | 2.7% |
| PFNA: 10 ppt level; unrounded average ≥15 ppt after applying EPA rounding | 0 | 37 | 0.0% |
| HFPO-DA: 10 ppt level; unrounded average ≥15 ppt after applying EPA rounding | 0 | 37 | 0.0% |
| Hazard Index: 1 level; unrounded index ≥1.5 and at least two detected components | 1 | 37 | 2.7% |
Community water systems with complete monitoring
“Complete monitoring” means at least one sampling location had every required sample needed to calculate a yearly average. It does not mean every location or home was tested. Each PWSID appears once, preventing double counting across ZIP associations.
| Public water system | PWSID | Population served | Primary source | Sampling locations | EPA comparison result |
|---|---|---|---|---|---|
| BIG BEND WATER DISTRICT | NV0004092 | 9,000 | Surface water | 1 | No available average above comparison levels |
| BOULDER CITY | NV0000011 | 15,000 | Surface water purchased | 1 | No available average above comparison levels |
| CARSON CITY PUBLIC WORKS | NV0000015 | 59,000 | Surface water | 7 | No available average above comparison levels |
| CHIPMUNK RETREAT | NV0002554 | 45 | Ground water | 1 | No available average above comparison levels |
| DAYTON VALLEY WATER SYSTEM | NV0000032 | 16,000 | Ground water | 8 | No available average above comparison levels |
| EAST VALLEY WATER SYSTEM | NV0002216 | 6,488 | Ground water | 1 | No available average above comparison levels |
| ELKO CITY OF | NV0000272 | 23,000 | Ground water | 19 | Above an EPA comparison level |
| ELY MUNICIPAL WATER DEPARTMENT | NV0000038 | 5,000 | Ground water | 6 | No available average above comparison levels |
| FALLON CITY OF | NV0000045 | 9,184 | Ground water | 1 | No available average above comparison levels |
| FERNLEY PUBLIC WORKS | NV0000062 | 23,064 | Ground water | 1 | Above an EPA comparison level |
| GARDNERVILLE RANCHOS GID | NV0000066 | 11,300 | Ground water | 7 | No available average above comparison levels |
| GARDNERVILLE WATER COMPANY | NV0000065 | 5,800 | Ground water | 8 | No available average above comparison levels |
| GREAT BASIN WATER CO COLD SPRINGS | NV0000207 | 9,910 | Ground water | 5 | No available average above comparison levels |
| GREAT BASIN WATER CO SPRING CREEK | NV0000036 | 9,340 | Ground water | 9 | No available average above comparison levels |
| GREAT BASIN WATER CO SPRING CREEK MHP | NV0005027 | 3,640 | Ground water | 3 | No available average above comparison levels |
| GREAT BASIN WATER COMPANY | NV0000270 | 12,255 | Ground water | 5 | No available average above comparison levels |
| HENDERSON CITY OF | NV0000076 | 336,534 | Surface water purchased | 2 | No available average above comparison levels |
| INCLINE VILLAGE GID | NV0000158 | 9,313 | Surface water | 2 | No available average above comparison levels |
| INDIAN HILLS GID | NV0000355 | 5,962 | Ground water | 5 | No available average above comparison levels |
| KINGSBURY GID | NV0000004 | 3,839 | Surface water | 1 | No available average above comparison levels |
| LANDER CO SEWER AND WATER DIST 1 BM | NV0000008 | 3,635 | Ground water | 4 | No available average above comparison levels |
| LAS VEGAS VALLEY WATER DISTRICT | NV0000090 | 1,539,277 | Surface water purchased | 20 | No available average above comparison levels |
| LOVELOCK MEADOWS WATER DISTRICT | NV0000161 | 3,562 | Ground water | 3 | No available average above comparison levels |
| MOAPA VALLEY WATER DISTRICT | NV0000160 | 8,500 | Ground water | 3 | No available average above comparison levels |
| MOUNTAIN FALLS WATER SYSTEM GBWC | NV0000920 | 4,345 | Ground water | 2 | No available average above comparison levels |
| NELLIS AIR FORCE BASE | NV0003028 | 19,081 | Surface water purchased | 3 | No available average above comparison levels |
| NORTH LAS VEGAS UTILITIES | NV0000175 | 376,515 | Surface water purchased | 4 | No available average above comparison levels |
| PRIMM VALLEY CASINO RESORTS | NV0001073 | 7,000 | Ground water | 1 | No available average above comparison levels |
| SAND CREEK | NV0000406 | 953 | Ground water | 1 | No available average above comparison levels |
| SOUTHERN DESERT CORRECTIONAL CTR NDOC | NV0005062 | 6,200 | Ground water | 2 | No available average above comparison levels |
| SUN VALLEY GID | NV0000211 | 17,000 | Surface water purchased | 1 | No available average above comparison levels |
| TOWN OF MINDEN | NV0000168 | 3,500 | Ground water | 9 | No available average above comparison levels |
| TRUCKEE MEADOWS WATER AUTHORITY | NV0000190 | 442,000 | Surface water | 68 | Above an EPA comparison level |
| VIRGIN VALLEY WATER DISTRICT | NV0000167 | 26,000 | Ground water | 7 | No available average above comparison levels |
| WEST WENDOVER WATER SYSTEM | NV0000246 | 4,535 | Ground water | 1 | No available average above comparison levels |
| WINNEMUCCA CITY OF | NV0000248 | 8,518 | Ground water | 6 | No available average above comparison levels |
| YERINGTON CITY OF | NV0000255 | 5,050 | Ground water | 2 | No available average above comparison levels |
What is included
Each active community water system with enough required samples for a yearly average is counted once, even if it is linked with several ZIP codes. Private wells are excluded, and UCMR 5 did not comprehensively monitor every small system.