Lyon County, NV
The federal environmental record for Lyon County (population 62,583): what is on file, where it is, and what remains open. Sources and retrieval dates are on the methodology page.
1
Superfund NPL sites
3
federal cleanup sites
1
PFAS-detecting water systems
16
TRI facilities
3
open tank releases
Superfund NPL sites
| Site | City | Status | Listed |
|---|---|---|---|
| Anaconda Copper Mine | Yerington | proposed | - |
Drinking water: PFAS testing
Public water systems serving Lyon with at least one PFAS detection under UCMR5. The federal limit for PFOA and PFOS is 4 ng/L; EPA proposed in May 2026 to rescind the limits for the other compounds, which are shown for information.
| System | Highest results | Reading |
|---|---|---|
| FERNLEY PUBLIC WORKS NV0000062 | PFOS: 5.6 ng/L | above final limit |
On a system with detections? Testing and treatment options
Facilities reporting toxic releases (2024)
16 facilities in Lyon filed TRI reports for 2024, totalling 607k lb released.
| Facility | City | Top chemicals | Total released |
|---|---|---|---|
| 21ST CENTURY ENVIRONMENTAL MANAGEMENT OF NEVADA LLC | FERNLEY | Lead And Lead Compounds, Chromium and Chromium Compounds(except for chromite ore mined in the Transvaal Region) | 536k lb |
| NEVADA CEMENT CO | FERNLEY | Ammonia, Chromium and Chromium Compounds(except for chromite ore mined in the Transvaal Region) | 33k lb |
| CARBOLINE GLOBAL INC. | DAYTON | Xylene (mixed isomers), Toluene | 14k lb |
| SHERWIN-WILLIAMS CO | FERNLEY | Zinc compounds, Ethylene glycol | 14k lb |
| OZARK MATERIALS LLC AN INGEVITY CO | DAYTON | Methanol | 8k lb |
| X-TREME BULLETS INC. | MOUND HOUSE | Copper, Lead | 760 lb |
| POLYGLASS USA INC | FERNLEY | Polycyclic aromatic compounds | 409 lb |
| FELDMEIER EQUIPMENT INC | FERNLEY | Chromium, Nickel | 366 lb |
| VALLEY JOIST LLC | FERNLEY | Manganese, Nickel | 58 lb |
| PNAC LLC - FERNLEY | FERNLEY | Naphthalene, Lead compounds | 20 lb |
| JOHNS MANVILLE | FERNLEY | Diisocyanates | 16 lb |
| SIKA - FERNLEY NV | FERNLEY | Diisocyanates | 10 lb |
| HENRY CO | FERNLEY | Polycyclic aromatic compounds | 2 lb |
| PUMPKIN HOLLOW PROJECT | YERINGTON | Copper compounds | 1 lb |
| TREX - NEVADA MANUFACTURING OPERATIONS | FERNLEY | - | 0 lb |
| STELLA-JONES CORP | SILVER SPRINGS | Polycyclic aromatic compounds | 0 lb |
Underground fuel tanks
EPA's UST Finder records 114 tank facilities in Lyon: 82 tanks in service and 214 closed. 95 fuel releases are on record, of which 3 remain open. Open releases are cleanups that have not reached "no further action".
Radon
EPA maps Lyon as Zone 1, the highest predicted indoor radon levels (over 4 pCi/L average). Radon and air quality are covered in depth on lung.com.
The record for one specific address
County figures blur what matters: distance. The Address Environmental Report runs these same federal datasets against one address and reports every site, tank, polluter and water result around it, with distances, in about a minute.
Get the report - $39All federal cleanup sites on file
The wider Superfund enterprise inventory (SEMS) for Lyon, including sites assessed but never listed. Presence here records that EPA had reason to look, not a finding of danger.
- ANACONDA COPPER MINEYERINGTON
- ARIMETCO INCORPORATED YERINGTON MINEYERINGTON
- CARSON RIVER MERCURY SITEDAYTON