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Beaverhead County, Montana: environmental and disease records

Cancer mortality in Beaverhead County is 133.8 deaths per 100,000 people per year against a U.S. rate of 143.2. Federal databases place 161 regulated facilities, sites and hazards inside the county, led by Rail grade crossing (82), NPDES wastewater discharge permit (54), Gas station (mapped facility) (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: 45.1499, -113.0197.

How this county ranks in Montana

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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 Beaverhead County compared with the United States
CancerMeasureCounty rateU.S. rateTimes U.S.95% intervalYears
Melanoma of the skinNew cases34.623.81.45x20.8 to 54.82019-2023
Lung & bronchusDeaths29.430.20.97x18.2 to 46.32020-2024
All cancerDeaths133.8143.20.93x109 to 163.72020-2024
All cancerNew cases384.8453.40.85x338.2 to 436.92019-2023
Lung & bronchusNew cases40.251.80.78x27.4 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 Beaverhead County
MeasureCountyU.S. medianDifferenceUnit
Premature death5,100.79,842.6-48%years of life lost before age 75 per 100,000
Life expectancy79.175.3+5%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 deaths69.496.9-28%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.

  • Formaldehyde7.68 per million
  • Carbon Tetrachloride2.53 per million
  • Acetaldehyde0.86 per million
  • Pahpom0.64 per million

EPA Air Quality Index 2025

Monitored on 342 days: 324 good, 0 unhealthy for sensitive groups or worse. Median AQI 13, peak 95.

Regulated facilities, sites and hazards by type

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

  • Rail grade crossing82
  • NPDES wastewater discharge permit54
  • Gas station (mapped facility)10
  • Public airport4
  • Brownfield property3
  • Auto repair or body shop (mapped facility)2
  • Major air pollution source1
  • EPA air quality monitor1
  • Air permit holder (minor source)1
  • Commercial airport1
  • Large hazardous waste generator1
  • 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.

  1. Barretts Minerals Inc. Mill Site, Dillon

    Major air pollution source.

    EPA FRS registry ID 110007654172 (U.S. EPA ECHO) Agency record

    Severity 4.8

  2. Beaverhead Livestock Auction, Dillon

    NPDES wastewater discharge permit.

    EPA FRS registry ID 110006822938 (U.S. EPA ECHO) Agency record

    Severity 4.3

  3. Barretts Minerals Inc. Mill Site, Dillon

    NPDES wastewater discharge permit.

    EPA FRS registry ID 110007654172 (U.S. EPA ECHO) Agency record

    Severity 4.3

  4. John Erb - East Bench Feedlot, Dillon

    NPDES wastewater discharge permit.

    EPA FRS registry ID 110010124560 (U.S. EPA ECHO) Agency record

    Severity 4

  5. Dillon, Mt Yard, Dillon

    NPDES wastewater discharge permit.

    EPA FRS registry ID 110070694623 (U.S. EPA ECHO) Agency record

    Severity 4

  6. 110 North Montana Street, Dillon

    Brownfield property.

    EPA FRS registry ID 110071972840 (U.S. EPA Brownfields (ACRES)) Agency record

    Severity 3

  7. 112 North Montana Street, Dillon

    Brownfield property.

    EPA FRS registry ID 110071972841 (U.S. EPA Brownfields (ACRES)) Agency record

    Severity 3

  8. Beaverhead Community Development Properties, Dillon

    Brownfield property.

    EPA FRS registry ID 110071973968 (U.S. EPA Brownfields (ACRES)) Agency record

    Severity 3

  9. Usda Forest Service - Sand Creek And Bobcat Lake Fires, Wisdom

    Large hazardous waste generator.

    EPA FRS registry ID x5a4906084671a3b6116ecc7c0be8da09 (U.S. EPA ECHO) Agency record

    Severity 3

  10. Big Hole National Battlefield, Wisdom

    Toxic chemical release facility (TRI). Chemicals: Mixture.

    TRI facility ID 5976WBGHLN16425 (U.S. EPA Toxics Release Inventory)

    Severity 3

  11. Elevation Newco Llc Treasure Mine, Dillon

    NPDES wastewater discharge permit.

    EPA FRS registry ID 110011047928 (U.S. EPA ECHO) Agency record

    Severity 2.5

  12. Beaver Pride, Dillon

    NPDES wastewater discharge permit.

    EPA FRS registry ID 110071347678 (U.S. EPA ECHO) Agency record

    Severity 2.5

  13. Barretts Minerals Inc, Dillon

    NPDES wastewater discharge permit.

    EPA FRS registry ID 110009860329 (U.S. EPA ECHO) Agency record

    Severity 2.3

  14. , Dillon

    EPA air quality monitor.

    Record ID 300010003 (U.S. EPA AirData)

    Severity 2

  15. City Of Dillon Wwtf, Dillon

    NPDES wastewater discharge permit.

    EPA FRS registry ID 110002063588 (U.S. EPA ECHO) Agency record

    Severity 2

  16. Smith Springs Channel Restoration, Wisdom

    NPDES wastewater discharge permit.

    EPA FRS registry ID 110071442845 (U.S. EPA ECHO) Agency record

    Severity 2

  17. Wise River, Wise River

    Public airport. O.

    Record ID 02T (FAA / U.S. DOT)

    Severity 2

  18. Dell Flight Strip, Dell

    Public airport. O.

    Record ID 4U9 (FAA / U.S. DOT)

    Severity 2

  19. Wisdom, Wisdom

    Public airport. O.

    Record ID 7S4 (FAA / U.S. DOT)

    Severity 2

  20. Dillon, Dillon

    Commercial airport. O.

    Record ID DLN (FAA / U.S. DOT)

    Severity 2

  21. Beaverhead Llc, Dillon

    NPDES wastewater discharge permit.

    EPA FRS registry ID 110011049828 (U.S. EPA ECHO) Agency record

    Severity 1.8

  22. Big West Management, Dillon

    NPDES wastewater discharge permit.

    EPA FRS registry ID 110037282678 (U.S. EPA ECHO) Agency record

    Severity 1.8

  23. Miles Lawrence, Bannack

    NPDES wastewater discharge permit.

    EPA FRS registry ID 110017889374 (U.S. EPA ECHO) Agency record

    Severity 1.5

  24. Western Fed. Lands Hwy Div. Grasshopper Creek 318 Permit, Dillon

    NPDES wastewater discharge permit.

    EPA FRS registry ID 110028113002 (U.S. EPA ECHO) Agency record

    Severity 1.5

  25. Edward T Copps Construction - Horse Prairie Creek 318 Permit, Grant

    NPDES wastewater discharge permit.

    EPA FRS registry ID 110030917612 (U.S. EPA ECHO) Agency record

    Severity 1.5

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 Beaverhead County

  • Montana 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 Beaverhead County, and their findings.

  • Montana vital statistics office

    Death certificate counts by cause of death and residence tract or ZIP code, and the years behind the mortality measures above.

  • Montana health department, environmental epidemiology

    Health consultations or assessments by ATSDR or the state health department covering the county, and any exposure investigations.

  • Montana 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.

  • Montana 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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