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Big Horn County, Wyoming: environmental and disease records

Cancer mortality in Big Horn County is 135.7 deaths per 100,000 people per year against a U.S. rate of 143.2. Federal databases place 177 regulated facilities, sites and hazards inside the county, led by Rail grade crossing (76), NPDES wastewater discharge permit (60), Air permit holder (minor source) (7). 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: 44.5828, -107.9843.

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 Big Horn County compared with the United States
CancerMeasureCounty rateU.S. rateTimes U.S.95% intervalYears
PancreasDeaths15.611.31.38x8.9 to 26.72020-2024
Kidney & renal pelvisNew cases21.917.91.22x11.8 to 37.22019-2023
Lung & bronchusDeaths3030.20.99x19.9 to 44.52020-2024
All cancerDeaths135.7143.20.95x112.7 to 162.82020-2024
All cancerNew cases374.7453.40.83x333.1 to 420.62019-2023
Lung & bronchusNew cases41.951.80.81x29.6 to 58.62019-2023

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 Big Horn County
MeasureCountyU.S. medianDifferenceUnit
Premature death8,576.79,842.6-13%years of life lost before age 75 per 100,000
Life expectancy76.175.3+1%years
Child mortalityn/a59.8n/adeaths under age 18 per 100,000
Infant mortalityn/a6.2n/adeaths under age 1 per 1,000 live births
Injury deaths119.296.9+23%deaths per 100,000
Drug overdose deathsn/a28.6n/adeaths 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.

  • Formaldehyde8.54 per million
  • Carbon Tetrachloride2.65 per million
  • Acetaldehyde0.74 per million
  • Pahpom0.63 per million

EPA Air Quality Index 2024

Monitored on 353 days: 315 good, 2 unhealthy for sensitive groups or worse. Median AQI 39, peak 119.

Regulated facilities, sites and hazards by type

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

  • Rail grade crossing76
  • NPDES wastewater discharge permit60
  • Air permit holder (minor source)7
  • Gas station (mapped facility)6
  • Major air pollution source5
  • Public airport4
  • Small hazardous waste generator3
  • Hazardous waste transporter3
  • TRI reporting facility3
  • Toxic chemical release facility (TRI)3
  • Auto repair or body shop (mapped facility)2
  • Large greenhouse gas emitter2
  • EPA air quality monitor1
  • Commercial airport1
  • Brownfield property1

Highest-severity records

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

  1. Lovell Plant (Western Sugar), Lovell

    TRI reporting facility.

    EPA FRS registry ID 110011679567 (U.S. EPA ECHO) Agency record

    Severity 7.3

  2. Western Sugar Cooperative Lovell Factory, Lovell

    Toxic chemical release facility (TRI). Chemicals: Ammonia. 133,729 lbs released over 5 years.

    TRI facility ID 82431THWST400GR (U.S. EPA Toxics Release Inventory)

    Severity 6.9

  3. Georgia-Pacific Gypsum Llc - Lovell Plant, Lovell

    Toxic chemical release facility (TRI). Chemicals: Lead And Lead Compounds, Lead compounds, Mercury And Mercury Compounds. 122 lbs released over 5 years.

    TRI facility ID 82431GRGPC2120L (U.S. EPA Toxics Release Inventory)

    Severity 4.6

  4. Georgia Pacific Corporation, Lovell

    TRI reporting facility.

    EPA FRS registry ID 110002136199 (U.S. EPA ECHO) Agency record

    Severity 4.5

  5. Big Horn Cooperative Marketing Association, Basin

    NPDES wastewater discharge permit.

    EPA FRS registry ID 110010853610 (U.S. EPA ECHO) Agency record

    Severity 4.5

  6. Mountain Pit #1, Unknown

    NPDES wastewater discharge permit.

    EPA FRS registry ID 110055169240 (U.S. EPA ECHO) Agency record

    Severity 4.5

  7. Greybull Cemetery Pit, (Unknown City)

    NPDES wastewater discharge permit.

    EPA FRS registry ID 110055204112 (U.S. EPA ECHO) Agency record

    Severity 4.5

  8. Northwest Table Mountain, Wyw123828, (Unknown City)

    NPDES wastewater discharge permit.

    EPA FRS registry ID 110055206628 (U.S. EPA ECHO) Agency record

    Severity 4.5

  9. Cody Pit, Wyw112056, (Unknown City)

    NPDES wastewater discharge permit.

    EPA FRS registry ID 110055206637 (U.S. EPA ECHO) Agency record

    Severity 4.5

  10. Greybull River Road Pit (Wyw112053), (Unknown City)

    NPDES wastewater discharge permit.

    EPA FRS registry ID 110055206646 (U.S. EPA ECHO) Agency record

    Severity 4.5

  11. Paint Rock Pit, Unknown

    NPDES wastewater discharge permit.

    EPA FRS registry ID 110070258218 (U.S. EPA ECHO) Agency record

    Severity 4.5

  12. Lester Friesen Feed Lot, Unknown

    NPDES wastewater discharge permit.

    EPA FRS registry ID 110070937713 (U.S. EPA ECHO) Agency record

    Severity 4.5

  13. Lovell Plant (Western Sugar), Lovell

    NPDES wastewater discharge permit.

    EPA FRS registry ID 110011679567 (U.S. EPA ECHO) Agency record

    Severity 4.3

  14. Basin Wastewater Lagoon, Basin

    NPDES wastewater discharge permit.

    EPA FRS registry ID 110055171362 (U.S. EPA ECHO) Agency record

    Severity 4.3

  15. Cetco, Lovell

    TRI reporting facility.

    EPA FRS registry ID 110002339666 (U.S. EPA ECHO) Agency record

    Severity 4

  16. Byron Wastewater Lagoon, Byron

    NPDES wastewater discharge permit.

    EPA FRS registry ID 110055177801 (U.S. EPA ECHO) Agency record

    Severity 4

  17. #1 Webb-Anderson, (Unknown City)

    NPDES wastewater discharge permit.

    EPA FRS registry ID 110055194560 (U.S. EPA ECHO) Agency record

    Severity 4

  18. Lovell Plant (Western Sugar), Lovell

    Large greenhouse gas emitter.

    EPA FRS registry ID 110011679567 (U.S. EPA ECHO) Agency record

    Severity 3.8

  19. Greybull Wastewater Lagoon, Greybull

    NPDES wastewater discharge permit.

    EPA FRS registry ID 110055178052 (U.S. EPA ECHO) Agency record

    Severity 3.8

  20. Georgia Pacific Corporation, Lovell

    Major air pollution source.

    EPA FRS registry ID 110002136199 (U.S. EPA ECHO) Agency record

    Severity 3.5

  21. Lovell Plant (American Colloid Co), Lovell

    Major air pollution source.

    EPA FRS registry ID 110007334848 (U.S. EPA ECHO) Agency record

    Severity 3.5

  22. Lovell Grinding Plant, Lovell

    Major air pollution source.

    EPA FRS registry ID 110007347004 (U.S. EPA ECHO) Agency record

    Severity 3.5

  23. Greybull Plant, Greybull

    Major air pollution source.

    EPA FRS registry ID 110010418100 (U.S. EPA ECHO) Agency record

    Severity 3.5

  24. Manderson Sewer Project, Manderson

    NPDES wastewater discharge permit.

    EPA FRS registry ID 110055204719 (U.S. EPA ECHO) Agency record

    Severity 3.5

  25. Frannie Lime Plant (Dakota Coal), Frannie

    Major air pollution source.

    EPA FRS registry ID 110063987404 (U.S. EPA ECHO) Agency record

    Severity 3.5

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 Big Horn 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 Big Horn 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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