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Sublette County, Wyoming: environmental and disease records

Cancer mortality in Sublette County is 102.2 deaths per 100,000 people per year against a U.S. rate of 143.2. Federal databases place 131 regulated facilities, sites and hazards inside the county, led by NPDES wastewater discharge permit (61), Air permit holder (minor source) (22), EPA air quality monitor (10). 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: 42.8663, -109.9564.

How this county ranks in Wyoming

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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 Sublette 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	43.1	23.8	1.81xSignificant	27.1 to 65.9	2019-2023
All cancer	New cases	391.8	453.4	0.86x	341.5 to 448.2	2019-2023
All cancer	Deaths	102.2	143.2	0.71x	78.7 to 131.4	2020-2024
Lung & bronchus	New cases	29.8	51.8	0.58x	18.1 to 47.6	2019-2023

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 Sublette County
Measure	County	U.S. median	Difference	Unit
Premature death	8,608.4	9,842.6	-13%	years of life lost before age 75 per 100,000
Life expectancy	80.2	75.3	+7%	years
Child mortality	n/a	59.8	n/a	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	93.7	96.9	-3%	deaths per 100,000
Drug overdose deaths	n/a	28.6	n/a	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.

Formaldehyde7.26 per million
Carbon Tetrachloride2.4 per million
Acetaldehyde0.57 per million
Pahpom0.44 per million

EPA Air Quality Index 2025

Monitored on 365 days: 256 good, 5 unhealthy for sensitive groups or worse. Median AQI 47, peak 164.

Regulated facilities, sites and hazards by type

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

NPDES wastewater discharge permit61
Air permit holder (minor source)22
EPA air quality monitor10
Gas station (mapped facility)9
Major air pollution source8
Auto repair or body shop (mapped facility)6
Public airport3
Small hazardous waste generator3
Commercial airport2
Brownfield property2
Hazardous waste transporter2
Heliport2
Toxic chemical release facility (TRI)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.

Water Treatment Facility, Unknown
NPDES wastewater discharge permit.
EPA FRS registry ID 110055165011 (U.S. EPA ECHO) Agency record
Severity 4.5
Eastfork Ranch Pit (Lqd Pt0810), (Unknown City)
NPDES wastewater discharge permit.
EPA FRS registry ID 110055169053 (U.S. EPA ECHO) Agency record
Severity 4.5
Meadow Canyon Ready-Mix, Inc. (2016) (Lqd Sp0724), (Unknown City)
NPDES wastewater discharge permit.
EPA FRS registry ID 110069208716 (U.S. EPA ECHO) Agency record
Severity 4.5
Reed Ready Mix, Unknown
NPDES wastewater discharge permit.
EPA FRS registry ID 110055186980 (U.S. EPA ECHO) Agency record
Severity 4.3
Marbleton Ready Mix Plant, Big Piney
NPDES wastewater discharge permit.
EPA FRS registry ID 110055373359 (U.S. EPA ECHO) Agency record
Severity 4.3
Marbleton Wastewater Lagoon, Marbleton
NPDES wastewater discharge permit.
EPA FRS registry ID 110055197674 (U.S. EPA ECHO) Agency record
Severity 4
Questar Gas Mgmt-Pinedale Cs, Unk
Major air pollution source.
EPA FRS registry ID 110012603496 (U.S. EPA ECHO) Agency record
Severity 3.5
Jonah Gas Gathering - Paradise Cs, Unk
Major air pollution source.
EPA FRS registry ID 110020760933 (U.S. EPA ECHO) Agency record
Severity 3.5
Jonah Gas Gathering - Luman Comp Stn, Unk
Major air pollution source.
EPA FRS registry ID 110020761585 (U.S. EPA ECHO) Agency record
Severity 3.5
Jonah Gas Gathering - Bridger, Unk
Major air pollution source.
EPA FRS registry ID 110030742052 (U.S. EPA ECHO) Agency record
Severity 3.5
Falcon Compressor Station, Pinedale
Major air pollution source.
EPA FRS registry ID 110043797264 (U.S. EPA ECHO) Agency record
Severity 3.5
Bird Canyon/County Line Compressor Station, Pinedale
Major air pollution source.
EPA FRS registry ID 110054196277 (U.S. EPA ECHO) Agency record
Severity 3.5
Boulder Rearing Station, (Unknown City)
NPDES wastewater discharge permit.
EPA FRS registry ID 110055243357 (U.S. EPA ECHO) Agency record
Severity 3.5
Marbleton #2 Landfill, Sublette County
Major air pollution source.
EPA FRS registry ID 110071499156 (U.S. EPA ECHO) Agency record
Severity 3.5
Produced Water Recycling Facility (Purewest Resources Inc.), Pinedale
Major air pollution source.
EPA FRS registry ID 110072245621 (U.S. EPA ECHO) Agency record
Severity 3.5
Pinedale Wastewater Lagoons, Pinedale
NPDES wastewater discharge permit.
EPA FRS registry ID 110055197433 (U.S. EPA ECHO) Agency record
Severity 3.3
204 South Jackson Ave, Pinedale
Brownfield property.
EPA FRS registry ID 110071975837 (U.S. EPA Brownfields (ACRES)) Agency record
Severity 3
Orcutt Tank, Pinedale
Brownfield property.
EPA FRS registry ID 110071975839 (U.S. EPA Brownfields (ACRES)) Agency record
Severity 3
Championx-Boulder, Boulder
Toxic chemical release facility (TRI). Chemicals: Methanol, Ethylene glycol.
TRI facility ID 8292WNLCCM4JAME (U.S. EPA Toxics Release Inventory)
Severity 3
Big Piney Wastewater Lagoon, Big Piney
NPDES wastewater discharge permit.
EPA FRS registry ID 110055171497 (U.S. EPA ECHO) Agency record
Severity 2.8
Eiden'S Auto Salvage, Marbleton
NPDES wastewater discharge permit.
EPA FRS registry ID 110055207798 (U.S. EPA ECHO) Agency record
Severity 2.8
White Pine Ski Area: Septic S, Pinedale
NPDES wastewater discharge permit.
EPA FRS registry ID 110071006202 (U.S. EPA ECHO) Agency record
Severity 2.8
Pinedale Shallow Waterline Replacement Project, Pinedale
NPDES wastewater discharge permit.
EPA FRS registry ID 110071945262 (U.S. EPA ECHO) Agency record
Severity 2.8
Pinedale Gaseous
EPA air quality monitor.
Record ID 560350101 (U.S. EPA AirData)
Severity 2.7
Sublette County Hospital District - Critical Access Hospital & Long Term Care Ce, Pinedale
NPDES wastewater discharge permit.
EPA FRS registry ID 110071335884 (U.S. EPA ECHO) Agency record
Severity 2.5

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 Sublette County

Wyoming 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 Sublette County, and their findings.
Wyoming vital statistics office
Death certificate counts by cause of death and residence tract or ZIP code, and the years behind the mortality measures above.
Wyoming health department, environmental epidemiology
Health consultations or assessments by ATSDR or the state health department covering the county, and any exposure investigations.
Wyoming 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.
Wyoming 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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