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Sheridan County, Wyoming: environmental and disease records

Cancer mortality in Sheridan County is 141.9 deaths per 100,000 people per year against a U.S. rate of 143.2. Federal databases place 253 regulated facilities, sites and hazards inside the county, led by Rail grade crossing (109), NPDES wastewater discharge permit (60), Air permit holder (minor source) (36). EPA AirToxScreen estimates a lifetime cancer risk from outdoor air toxics of 20 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: 44.7786, -106.903.

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 Sheridan 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	44.3	23.8	1.86xSignificant	35.1 to 55.2	2019-2023
Thyroid	New cases	17.2	13	1.32x	11.2 to 25.1	2019-2023
Bladder	New cases	19.6	18.7	1.05x	14.5 to 26.4	2019-2023
Lung & bronchus	Deaths	30.7	30.2	1.02x	24.2 to 38.7	2020-2024
Leukemia	New cases	14.7	14.5	1.01x	9.9 to 21.2	2019-2023
All cancer	Deaths	141.9	143.2	0.99x	127.1 to 158.3	2020-2024
Pancreas	Deaths	11	11.3	0.97x	7.2 to 16.5	2020-2024
All cancer	New cases	420.9	453.4	0.93x	393.5 to 449.9	2019-2023
Pancreas	New cases	12.6	13.9	0.91x	8.4 to 18.6	2019-2023
Kidney & renal pelvis	New cases	14.9	17.9	0.83x	9.9 to 21.6	2019-2023
Lung & bronchus	New cases	39	51.8	0.75x	31.5 to 48.1	2019-2023
Non-Hodgkin lymphoma	New cases	13	18.5	0.7x	8.4 to 19.4	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 Sheridan County
Measure	County	U.S. median	Difference	Unit
Premature death	7,011.3	9,842.6	-29%	years of life lost before age 75 per 100,000
Life expectancy	78.2	75.3	+4%	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	97.9	96.9	+1%	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: 20 in a million. EPA treats 100 in a million as the upper end of acceptable risk and 1 in a million as the goal.

Formaldehyde9.69 per million
Carbon Tetrachloride2.63 per million
Acetaldehyde0.93 per million
Naphthalene0.79 per million

EPA Air Quality Index 2025

Monitored on 359 days: 320 good, 0 unhealthy for sensitive groups or worse. Median AQI 27, peak 75.

Regulated facilities, sites and hazards by type

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

Rail grade crossing109
NPDES wastewater discharge permit60
Air permit holder (minor source)36
Brownfield property15
Gas station (mapped facility)9
Small hazardous waste generator7
EPA air quality monitor3
Hazardous waste transporter3
Scrapyard (mapped facility)2
Major air pollution source1
Public airport1
Commercial airport1
Auto repair or body shop (mapped facility)1
Large hazardous waste generator1
Heliport1
Gas power plant1
TRI reporting facility1
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.

L&H Industrial Aka Industrial Plating & Grinding Inc, Sheridan
TRI reporting facility.
EPA FRS registry ID 110005578428 (U.S. EPA ECHO) Agency record
Severity 7
L&H Industrial Aka Industrial Plating & Grinding Inc, Sheridan
Large hazardous waste generator.
EPA FRS registry ID 110005578428 (U.S. EPA ECHO) Agency record
Severity 6
Sheridan County, Sheridan
Commercial airport. O.
Record ID SHR (FAA / U.S. DOT)
Severity 5
L&H Industrial Aka Industrial Plating & Grinding Inc, Sheridan
NPDES wastewater discharge permit.
EPA FRS registry ID 110005578428 (U.S. EPA ECHO) Agency record
Severity 4.5
Hanft Pit (Lqd Et1420), (Unknown City)
NPDES wastewater discharge permit.
EPA FRS registry ID 110055182500 (U.S. EPA ECHO) Agency record
Severity 4.5
Little Goose Ranch Pit (Lqd Et0729), (Unknown City)
NPDES wastewater discharge permit.
EPA FRS registry ID 110055182662 (U.S. EPA ECHO) Agency record
Severity 4.5
Buffalo Plant, Unknown
NPDES wastewater discharge permit.
EPA FRS registry ID 110064618196 (U.S. EPA ECHO) Agency record
Severity 4.5
Sheridan Plant-Croell Igp, Unknown
NPDES wastewater discharge permit.
EPA FRS registry ID 110064618203 (U.S. EPA ECHO) Agency record
Severity 4.5
Sherard Hydroelectric Generation Facility, Unknown
NPDES wastewater discharge permit.
EPA FRS registry ID 110064634249 (U.S. EPA ECHO) Agency record
Severity 4.5
Airport Terminal Building, Sheridan
NPDES wastewater discharge permit.
EPA FRS registry ID 110071710601 (U.S. EPA ECHO) Agency record
Severity 4.5
L&H Industrial Inc., Sheridan
Toxic chemical release facility (TRI). Chemicals: Lead. Reports carcinogens.
TRI facility ID 8280WLHNDS199CM (U.S. EPA Toxics Release Inventory)
Severity 4.5
Sheridan Wastewater Treatment, Sheridan
NPDES wastewater discharge permit.
EPA FRS registry ID 110064617678 (U.S. EPA ECHO) Agency record
Severity 4.3
Lieb Reservoir, Unknown
NPDES wastewater discharge permit.
EPA FRS registry ID 110069571261 (U.S. EPA ECHO) Agency record
Severity 4.3
Sheridan Mobile, Sheridan
EPA air quality monitor.
Record ID 560330007 (U.S. EPA AirData)
Severity 4
L&H Industrial Aka Industrial Plating & Grinding Inc, Sheridan
Air permit holder (minor source).
EPA FRS registry ID 110005578428 (U.S. EPA ECHO) Agency record
Severity 4
Sheridan Va Medical Center, Sheridan
NPDES wastewater discharge permit.
EPA FRS registry ID 110013028918 (U.S. EPA ECHO) Agency record
Severity 3.8
Voa Independent Living Apartments, (Unknown City)
NPDES wastewater discharge permit.
EPA FRS registry ID 110071786082 (U.S. EPA ECHO) Agency record
Severity 3.8
Ranchester Wastewater Lagoons, Ranchester
NPDES wastewater discharge permit.
EPA FRS registry ID 110055197727 (U.S. EPA ECHO) Agency record
Severity 3.5
Augusta-Pebble Beach Compressor Station (Pronghorn Midstream Llc), Johnson County
Major air pollution source.
EPA FRS registry ID 110061084794 (U.S. EPA ECHO) Agency record
Severity 3.5
Sheridan - Police Sta. SLAM Site, Sheridan
EPA air quality monitor.
Record ID 560330002 (U.S. EPA AirData)
Severity 3.3
Sheridan Va Medical Center, Sheridan
Air permit holder (minor source).
EPA FRS registry ID 110013028918 (U.S. EPA ECHO) Agency record
Severity 3.3
City Of Sheridan Service Center, Sheridan
NPDES wastewater discharge permit.
EPA FRS registry ID 110070313257 (U.S. EPA ECHO) Agency record
Severity 3.3
Arvada, Arvada
Gas power plant.
Record ID 8028 (U.S. Energy Information Administration)
Severity 3
Thunder Child Treatment Center, Sheridan
Brownfield property.
EPA FRS registry ID 110032613704 (U.S. EPA Brownfields (ACRES)) Agency record
Severity 3
Goose Creek Properties, Former Ancar Tank, Sheridan
Brownfield property.
EPA FRS registry ID 110039138448 (U.S. EPA Brownfields (ACRES)) Agency record
Severity 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 Sheridan 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 Sheridan 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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