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Humboldt County, Nevada: environmental and disease records

Cancer mortality in Humboldt County is 117.4 deaths per 100,000 people per year against a U.S. rate of 143.2. Federal databases place 198 regulated facilities, sites and hazards inside the county, led by NPDES wastewater discharge permit (55), Rail grade crossing (40), Gas station (mapped facility) (28). EPA AirToxScreen estimates a lifetime cancer risk from outdoor air toxics of 10 in a million, driven mainly by formaldehyde.

Rates are age-adjusted per 100,000 people. A cancer signal is marked significant when the lower bound of its 95 percent confidence interval is above the U.S. rate. Facility counts use active federal records located inside the county boundary. Approximate county center: 41.3322, -118.1617.

How this county ranks in Nevada

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Cancer deaths and new cases versus the United States

Source: NCI and CDC State Cancer Profiles, both sexes, all ages. Sorted by the ratio of the county rate to the U.S. rate.

Cancer rates for Humboldt County compared with the United States
Cancer	Measure	County rate	U.S. rate	Times U.S.	95% interval	Years
Melanoma of the skin	New cases	20.4	23.8	0.86x	12.3 to 32	2019-2023
All cancer	New cases	381.5	453.4	0.84x	342.3 to 424.1	2019-2023
All cancer	Deaths	117.4	143.2	0.82x	96 to 142.2	2020-2024
Lung & bronchus	New cases	36.3	51.8	0.7x	25.3 to 50.6	2019-2023
Lung & bronchus	Deaths	15.2	30.2	0.5x	8.5 to 25.5	2020-2024

Mortality measures versus the U.S. county median

Source: County Health Rankings, built from CDC National Vital Statistics System death records. The comparison value is the median of all U.S. counties.

Mortality measures for Humboldt County
Measure	County	U.S. median	Difference	Unit
Premature death	11,481.2	9,842.6	+17%	years of life lost before age 75 per 100,000
Life expectancy	74.1	75.3	-2%	years
Child mortality	55	59.8	-8%	deaths under age 18 per 100,000
Infant mortality	n/a	6.2	n/a	deaths under age 1 per 1,000 live births
Injury deaths	121.6	96.9	+25%	deaths per 100,000
Drug overdose deaths	19.3	28.6	-33%	deaths per 100,000

Air toxics and air quality

EPA AirToxScreen 2020

Lifetime cancer risk from outdoor air toxics: 10 in a million. EPA treats 100 in a million as the upper end of acceptable risk and 1 in a million as the goal.

Formaldehyde9.03 per million
Carbon Tetrachloride2.56 per million
Acetaldehyde0.76 per million
Pahpom0.59 per million

EPA Air Quality Index

No EPA air quality monitor reports daily AQI for this county.

Regulated facilities, sites and hazards by type

198 active records inside the county from EPA ECHO, TRI, Superfund, Brownfields, NPDES, EIA, FAA, FRA and corrections data.

NPDES wastewater discharge permit55
Rail grade crossing40
Gas station (mapped facility)28
Wastewater plant (mapped facility)13
Toxic chemical release facility (TRI)10
Public airport7
Auto repair or body shop (mapped facility)7
Large hazardous waste generator7
TRI reporting facility7
Major air pollution source5
Air permit holder (minor source)5
Brownfield property5
Commercial airport1
Small hazardous waste generator1
Hazardous waste transporter1
Heliport1
Landfill (mapped facility)1
Coal power plant1
Geothermal plant1
Solar power plant1
Scrapyard (mapped facility)1

Highest-severity records

The 25 records with the highest Envyrofax severity in the county, with the agency identifier to cite in a records request.

Nevada Gold Mines Llc - Turquoise Ridge, Golconda
Toxic chemical release facility (TRI). Chemicals: Arsenic compounds, Antimony compounds, Nitrate compounds (water dissociable; reportable only when in aqueous solution), Manganese And Manganese Compounds and 4 more. Reports carcinogens. 144,350,744 lbs released over 5 years.
TRI facility ID 89414GTCHL28MIN (U.S. EPA Toxics Release Inventory)
Severity 10
Sierra Pacific Power Co North Valmy Station, Valmy
Toxic chemical release facility (TRI). Chemicals: Barium compounds (except for barium sulfate (CAS No. 7727-43-7)), Manganese compounds, Chromium, Chromium compounds (except for chromite ore mined in the Transvaal Region) and 3 more. Reports carcinogens. 563,201 lbs released over 5 years.
TRI facility ID 89438NRTHVI80EX (U.S. EPA Toxics Release Inventory)
Severity 8.9
Hycroft Mine, Winnemucca
Toxic chemical release facility (TRI). Chemicals: Mercury compounds, Toluene, Xylene (mixed isomers), Selenium compounds and 4 more. Reports carcinogens. 182,991 lbs released over 5 years.
TRI facility ID 89446HYCRF52MIL (U.S. EPA Toxics Release Inventory)
Severity 8.5
Marigold Mining Co, Valmy
Toxic chemical release facility (TRI). Chemicals: Lead And Lead Compounds, Nitrate compounds (water dissociable; reportable only when in aqueous solution), Lead compounds, Mercury And Mercury Compounds and 3 more. 6,592,712 lbs released over 5 years.
TRI facility ID 89438GLMSM3MILE (U.S. EPA Toxics Release Inventory)
Severity 8.2
Winnemucca Plant, Winnemucca
TRI reporting facility. Penalties $13,600.
EPA FRS registry ID 110000473005 (U.S. EPA ECHO) Agency record
Severity 7.1
Barrick Turquoise Ridge Inc, Golconda
TRI reporting facility.
EPA FRS registry ID 110002048025 (U.S. EPA ECHO) Agency record
Severity 7
Marigold Mining Company, Valmy
TRI reporting facility.
EPA FRS registry ID 110007979982 (U.S. EPA ECHO) Agency record
Severity 6.8
Hollister Mine, Winnemucca
Toxic chemical release facility (TRI). Chemicals: Lead. Reports carcinogens. 646 lbs released over 5 years.
TRI facility ID 89446HLLSTTWNSH (U.S. EPA Toxics Release Inventory)
Severity 6.7
North Valmy, Valmy
Coal power plant.
Record ID 8224 (U.S. Energy Information Administration)
Severity 6.5
Cyanco Co Llc, Winnemucca
Toxic chemical release facility (TRI). Chemicals: Ammonia, Hydrogen cyanide, Cyanide compounds. 29,955 lbs released over 5 years.
TRI facility ID 89445CYNCX9000W (U.S. EPA Toxics Release Inventory)
Severity 6.4
Sierra Pacific Power Co North Valmy Station, Golconda
TRI reporting facility.
EPA FRS registry ID 110000495508 (U.S. EPA ECHO) Agency record
Severity 6.4
Carry-On Trailer Corp, Winnemucca
Toxic chemical release facility (TRI). Chemicals: Manganese, Nickel, Lead. Reports carcinogens. 216 lbs released over 5 years.
TRI facility ID 89445CRRYN53WES (U.S. EPA Toxics Release Inventory)
Severity 6.3
Granite Creek Mine, Golconda
Toxic chemical release facility (TRI). Chemicals: Mercury compounds, Lead And Lead Compounds. 10,718 lbs released over 5 years.
TRI facility ID 89414PNSNM22MIL (U.S. EPA Toxics Release Inventory)
Severity 6.1
Hycroft, Winnemucca
Large hazardous waste generator.
EPA FRS registry ID 110059852459 (U.S. EPA ECHO) Agency record
Severity 6
Twin Creeks Mine, Golconda
Large hazardous waste generator.
EPA FRS registry ID 110070746525 (U.S. EPA ECHO) Agency record
Severity 6
Lone Tree Mine, Valmy
Large hazardous waste generator.
EPA FRS registry ID 110072237165 (U.S. EPA ECHO) Agency record
Severity 6
Goldcorp Dee Llc - Lone Tree Mine, Valmy
Toxic chemical release facility (TRI). Chemicals: Cyanide compounds, Manganese compounds, Ammonia, Nitrate compounds (water dissociable; reportable only when in aqueous solution) and 2 more. 6,496 lbs released over 5 years.
TRI facility ID 89438NWMNTSTONE (U.S. EPA Toxics Release Inventory)
Severity 5.9
Pinson Mine, Golconda
TRI reporting facility.
EPA FRS registry ID 110007978983 (U.S. EPA ECHO) Agency record
Severity 5.7
Midas Project, Midas
Toxic chemical release facility (TRI). Chemicals: Copper compounds, Cyanide compounds, Manganese compounds, Lead compounds and 1 more. 1,301 lbs released over 5 years.
TRI facility ID 89414KNSNY60MIL (U.S. EPA Toxics Release Inventory)
Severity 5.4
Winnemucca Plant, Winnemucca
Major air pollution source. Penalties $13,600.
EPA FRS registry ID 110000473005 (U.S. EPA ECHO) Agency record
Severity 4.8
Carry-On Trailer Corp, Winnemucca
TRI reporting facility.
EPA FRS registry ID 110037150196 (U.S. EPA ECHO) Agency record
Severity 4.7
Twin Creeks Mine, Golconda
Major air pollution source.
EPA FRS registry ID 110000601028 (U.S. EPA ECHO) Agency record
Severity 4.5
Hycroft, Winnemucca
NPDES wastewater discharge permit.
EPA FRS registry ID 110059852459 (U.S. EPA ECHO) Agency record
Severity 4.5
Winnemucca Plant, Winnemucca
Large hazardous waste generator. Penalties $13,600.
EPA FRS registry ID 110000473005 (U.S. EPA ECHO) Agency record
Severity 4.3
Winnemucca Plant, Winnemucca
NPDES wastewater discharge permit. Penalties $13,600.
EPA FRS registry ID 110000473005 (U.S. EPA ECHO) Agency record
Severity 4.3

Correctional facilities

Prisons, jails and corrections operations with an EPA facility record, and the drinking water and wastewater compliance attached to them.

No correctional facility with an EPA record is located in this county.

Discovery / public records

Records to request for Humboldt County

Nevada state cancer registry
Cancer incidence counts by census tract or ZIP code, by cancer type and year (de-identified). Any cancer cluster inquiries or investigations in Humboldt County, and their findings.
Nevada vital statistics office
Death certificate counts by cause of death and residence tract or ZIP code, and the years behind the mortality measures above.
Nevada health department, environmental epidemiology
Health consultations or assessments by ATSDR or the state health department covering the county, and any exposure investigations.
Nevada environmental agency and the U.S. EPA regional office
Compliance history, inspection reports, notices of violation, penalties and enforcement actions for each facility above, cited by EPA FRS registry ID.
Nevada drinking water program
Violation notices, sampling results and sanitary surveys for the public water systems serving the county, including any system serving a correctional facility.
Department of corrections or county sheriff
Water testing, grievances and environmental health inspections for the correctional facilities listed above.

Each Envyrofax address report includes a printable records request worksheet with the custodian and the exact request wording per finding.

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