EPA data as of Oct 2026 · page updated 2026-10-30
Nevada: drinking water & radon
Nevada has 228 active community water systems. Since 2016, 95 reported health-based violations; 2 had a latest lead result above 15 ppb; 4 measured PFOA or PFOS at or above 4 ppt.
Water systems228
With violations95
Radon zone 1 ZIPs38
ZIPs likely on wells69
Radon zones in Nevada
tap a countyZone 1 · highestZone 2 · moderateZone 3 · low
Most health-based violations
| Rosemount Water Co 54 people | 74 |
| Silver Knolls Mutual Water Company 120 people | 40 |
| Shoshone Estates Water Co INC 240 people | 39 |
| Katherine Landing DWTP 1,300 people | 21 |
| Mcdermitt Water System 200 people | 20 |
| OLD River Water Company 300 people | 14 |
| Duckwater 166 people | 13 |
| Primm Valley Casino Resorts 7,000 people | 12 |
| Desert Sunrise Water Users Assoc 25 people | 11 |
| Roark Estates Water Assoc 60 people | 11 |
Highest latest lead (90th percentile)
| Battle Mountain 195 people | 17 ppb |
| Duck Valley Newtown 450 people | 13.5 ppb |
| Duck Valley Owyhee 150 people | 13.5 ppb |
| Olympic Valley MWC 151 people | 10 ppb |
| Ruth Water District 470 people | 8 ppb |
| Mcgill Water and Sewer Dist 1,200 people | 8 ppb |
| ELK Point Country Club 325 people | 8 ppb |
| Kyle Canyon Water District 1,040 people | 7.9 ppb |
| Nellis Air Force Base 19,081 people | 6.7 ppb |
| Rancho Vista 3 50 people | 6.3 ppb |
Highest PFOA / PFOS
| City of Elko 23,000 people | 46 ppt |
| Truckee Meadows Water Authority 442,000 people | 20 ppt |
| Fernley Public Works 23,064 people | 5.6 ppt |
| Gardnerville Water Company 5,800 people | 4 ppt |
Largest systems
| Las Vegas Valley Water District 1,539,277 people | 1,539,277 |
| Truckee Meadows Water Authority 442,000 people | 442,000 |
| North Las Vegas Utilities 376,515 people | 376,515 |
| City of Henderson 336,534 people | 336,534 |
| Carson City Public Works 59,000 people | 59,000 |
| Virgin Valley Water District 26,000 people | 26,000 |
| Fernley Public Works 23,064 people | 23,064 |
| City of Elko 23,000 people | 23,000 |
| Nellis Air Force Base 19,081 people | 19,081 |
| Sun Valley Gid 17,000 people | 17,000 |
All ZIP codes in Nevada
250 ZIP codes.
88901The Lakes88905The Lakes89001Alamo89002Henderson89003Beatty89004Blue Diamond89005Boulder City89006Boulder City89007Bunkerville89008Caliente89009Henderson89010Dyer89011Henderson89012Henderson89013Goldfield89014Henderson89015Henderson89016Henderson89017Hiko89018Indian Springs89019Jean89020Amargosa Valley89021Logandale89022Manhattan89023Mercury89024Mesquite89025Moapa89026Jean89027Mesquite89028Laughlin89029Laughlin89030North Las Vegas89031North Las Vegas89032North Las Vegas89034Mesquite89036North Las Vegas89037Coyote Springs89039Cal Nev Ari89040Overton89041Pahrump89042Panaca89043Pioche89044Henderson89045Round Mountain89046Searchlight89047Silverpeak89048Pahrump89049Tonopah89052Henderson89053Henderson89054Sloan89060Pahrump89061Pahrump89067Moapa89070Indian Springs89074Henderson89077Henderson89081North Las Vegas89084North Las Vegas89085North Las Vegas89086North Las Vegas89087North Las Vegas89101Las Vegas89102Las Vegas89103Las Vegas89104Las Vegas89105Las Vegas89106Las Vegas89107Las Vegas89108Las Vegas89109Las Vegas89110Las Vegas89111Las Vegas89112Las Vegas89113Las Vegas89114Las Vegas89115Las Vegas89116Las Vegas89117Las Vegas89118Las Vegas89119Las Vegas89120Las Vegas89121Las Vegas89122Las Vegas89123Las Vegas89124Las Vegas89125Las Vegas89126Las Vegas89127Las Vegas89128Las Vegas89129Las Vegas89130Las Vegas89131Las Vegas89132Las Vegas89133Las Vegas89134Las Vegas89135Las Vegas89136Las Vegas89137Las Vegas89138Las Vegas89139Las Vegas89140Las Vegas89141Las Vegas89142Las Vegas89143Las Vegas89144Las Vegas89145Las Vegas89146Las Vegas89147Las Vegas89148Las Vegas89149Las Vegas89150Las Vegas89151Las Vegas89152Las Vegas89153Las Vegas89155Las Vegas89156Las Vegas89157Las Vegas89158Las Vegas89159Las Vegas89160Las Vegas89161Las Vegas89162Las Vegas89163The Lakes89164Las Vegas89166Las Vegas89169Las Vegas89170Las Vegas89173Las Vegas89177Las Vegas89178Las Vegas89179Las Vegas89180Las Vegas89183Las Vegas89185Las Vegas89191Nellis Afb89193Las Vegas89195Las Vegas89199Las Vegas89301Ely89310Austin89311Baker89314Duckwater89315Ely89316Eureka89317Lund89318Mc Gill89402Crystal Bay89403Dayton89404Denio89405Empire89406Fallon89407Fallon89408Fernley89409Gabbs89410Gardnerville89411Genoa89412Gerlach89413Glenbrook89414Golconda89415Hawthorne89418Imlay89419Lovelock89420Luning89421Mc Dermitt89422Mina89423Minden89424Nixon89425Orovada89426Paradise Valley89427Schurz89428Silver City89429Silver Springs89430Smith89431Sparks89432Sparks89433Sun Valley89434Sparks89435Sparks89436Sparks89437Sparks89438Valmy89439Verdi89440Virginia City89441Sparks89442Wadsworth89444Wellington89445Winnemucca89446Winnemucca89447Yerington89448Zephyr Cove89449Stateline89450Incline Village89451Incline Village89452Incline Village89460Gardnerville89496Fallon89501Reno89502Reno89503Reno89504Reno89505Reno89506Reno89507Reno89508Reno89509Reno89510Reno89511Reno89512Reno89513Reno89515Reno89519Reno89520Reno89521Reno89523Reno89533Reno89555Reno89557Reno89570Reno89595Reno89599Reno89701Carson City89702Carson City89703Carson City89704Washoe Valley89705Carson City89706Carson City89711Carson City89712Carson City89713Carson City89714Carson City89721Carson City89801Elko89802Elko89803Elko89815Spring Creek89820Battle Mountain89821Crescent Valley89822Carlin89823Deeth89825Jackpot89826Jarbidge89828Lamoille89830Montello89831Mountain City89832Owyhee89833Ruby Valley89834Tuscarora89835Wells89883West Wendover
What this is — and isn’t. These are records your water utility and state reported to the EPA, and the EPA’s radon map for your county. They describe the system and the area, not the water from your own tap or the air in your home. For that, read your utility’s annual Consumer Confidence Report and test: lead and radon tests are inexpensive.
Questions
How many water systems in Nevada have violations?
95 of 228 active community water systems in Nevada reported at least one health-based violation since 2016 (EPA SDWIS).
What is the radon risk in Nevada?
38 ZIP codes are in EPA radon zone 1 (highest potential), 85 in zone 2 and 121 in zone 3. EPA recommends testing every home.