Humboldt County, NV
The federal environmental record for Humboldt County (population 17,136): what is on file, where it is, and what remains open. Sources and retrieval dates are on the methodology page.
0
Superfund NPL sites
8
federal cleanup sites
0
PFAS-detecting water systems
7
TRI facilities
7
open tank releases
Drinking water: PFAS testing
No public water system serving Humboldt reported a PFAS detection in the UCMR5 national testing round. Systems serving under 3,300 people were only sampled in part, so absence from this table is not proof of absence in the water.
Facilities reporting toxic releases (2024)
7 facilities in Humboldt filed TRI reports for 2024, totalling 16.6M lb released.
| Facility | City | Top chemicals | Total released |
|---|---|---|---|
| NEVADA GOLD MINES LLC - TURQUOISE RIDGE | GOLCONDA | Arsenic compounds, Antimony compounds | 15.1M lb |
| MARIGOLD MINING CO | VALMY | Lead And Lead Compounds, Nitrate compounds (water dissociable; reportable only when in aqueous solution) | 1.3M lb |
| SIERRA PACIFIC POWER CO NORTH VALMY STATION | VALMY | Barium compounds (except for barium sulfate (CAS No. 7727-43-7)), Manganese compounds | 135k lb |
| CYANCO CO LLC | WINNEMUCCA | Cyanide compounds, Ammonia | 26k lb |
| GRANITE CREEK MINE | GOLCONDA | Mercury compounds, Lead And Lead Compounds | 5k lb |
| CARRY-ON TRAILER CORP | WINNEMUCCA | Manganese, Nickel | 73 lb |
| GOLDCORP DEE LLC - LONE TREE MINE | VALMY | Mercury compounds | 0 lb |
Underground fuel tanks
EPA's UST Finder records 124 tank facilities in Humboldt: 76 tanks in service and 239 closed. 56 fuel releases are on record, of which 7 remain open. Open releases are cleanups that have not reached "no further action".
Radon
EPA maps Humboldt as Zone 2, moderate predicted indoor radon (2 to 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 Humboldt, including sites assessed but never listed. Presence here records that EPA had reason to look, not a finding of danger.
- FORT MCDERMITT RESERVATION MERCURYWINNEMUCCA
- JUPITER GOLD COWINNEMUCCA
- MCDERMITT MINEMCDERMITT
- MINERALS CONCENTRATES & CHEMWINNEMUCCA
- MULTI-METALICS INCWINNEMUCCA
- QUINN RIVER VALLEYHUMBOLDT
- WINNEMUCCA MERCURYWINNEMUCCA
- WINNEMUCCA MINEWINNEMUCCA