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Teton County, Montana: environmental and disease records

Cancer mortality in Teton County is 118.7 deaths per 100,000 people per year against a U.S. rate of 143.2. Federal databases place 113 regulated facilities, sites and hazards inside the county, led by Rail grade crossing (62), NPDES wastewater discharge permit (35), Gas station (mapped facility) (4). 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: 47.8173, -112.1622.

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 Teton County compared with the United States
Cancer	Measure	County rate	U.S. rate	Times U.S.	95% interval	Years
All cancer	New cases	417.1	453.4	0.92x	357.2 to 485.1	2019-2023
All cancer	Deaths	118.7	143.2	0.83x	92 to 152.7	2020-2024
Lung & bronchus	New cases	28.2	51.8	0.54x	16.1 to 48.5	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 Teton County
Measure	County	U.S. median	Difference	Unit
Premature death	7,921.8	9,842.6	-20%	years of life lost before age 75 per 100,000
Life expectancy	77.7	75.3	+3%	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	128.2	96.9	+32%	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.

Formaldehyde8.07 per million
Carbon Tetrachloride2.68 per million
Acetaldehyde0.94 per million
Pahpom0.68 per million

EPA Air Quality Index 2025

Monitored on 277 days: 269 good, 0 unhealthy for sensitive groups or worse. Median AQI 12, peak 92.

Regulated facilities, sites and hazards by type

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

Rail grade crossing62
NPDES wastewater discharge permit35
Gas station (mapped facility)4
Public airport2
Auto repair or body shop (mapped facility)2
Brownfield property2
Wind power plant2
EPA air quality monitor1
Commercial airport1
Hazardous waste transporter1
Hydroelectric plant1

Highest-severity records

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

Miller Colony - Feedlot, Choteau
NPDES wastewater discharge permit.
EPA FRS registry ID 110060371404 (U.S. EPA ECHO) Agency record
Severity 4
Rock Port Colony, Pendroy
NPDES wastewater discharge permit.
EPA FRS registry ID 110011049793 (U.S. EPA ECHO) Agency record
Severity 3.8
New Rockport Colony Inc, Choteau
NPDES wastewater discharge permit.
EPA FRS registry ID 110011049784 (U.S. EPA ECHO) Agency record
Severity 3.5
Clarus-Lyons, Dutton
Brownfield property.
EPA FRS registry ID 110071964265 (U.S. EPA Brownfields (ACRES)) Agency record
Severity 3
Teton County Nursing Home, Choteau
Brownfield property.
EPA FRS registry ID 110071983068 (U.S. EPA Brownfields (ACRES)) Agency record
Severity 3
Town Of Dutton Wastewater Treatment Facility, Dutton
NPDES wastewater discharge permit.
EPA FRS registry ID 110070506552 (U.S. EPA ECHO) Agency record
Severity 3
North Montana Feeders Inc, Choteau
NPDES wastewater discharge permit.
EPA FRS registry ID 110012305521 (U.S. EPA ECHO) Agency record
Severity 2.8
Power Water Treatment Plant, Power
NPDES wastewater discharge permit.
EPA FRS registry ID 110020143085 (U.S. EPA ECHO) Agency record
Severity 2.8
Choteau, Choteau
EPA air quality monitor.
Record ID 300990005 (U.S. EPA AirData)
Severity 2.1
Town Of Fairfield Wwtp, Fairfield
NPDES wastewater discharge permit.
EPA FRS registry ID 110009860793 (U.S. EPA ECHO) Agency record
Severity 2
Dutton, Dutton
Public airport. O.
Record ID 5U1 (FAA / U.S. DOT)
Severity 2
Fairfield, Fairfield
Public airport. O.
Record ID 5U5 (FAA / U.S. DOT)
Severity 2
Choteau, Choteau
Commercial airport. O.
Record ID CII (FAA / U.S. DOT)
Severity 2
Choteau Sewage Treatment Ponds, Choteau
NPDES wastewater discharge permit.
EPA FRS registry ID 110006723135 (U.S. EPA ECHO) Agency record
Severity 1.5
City Of Choteau, Choteau
NPDES wastewater discharge permit.
EPA FRS registry ID 110023137265 (U.S. EPA ECHO) Agency record
Severity 1.5
Mt Fwp - Tunnel Lake 308 Permit, Choteau
NPDES wastewater discharge permit.
EPA FRS registry ID 110035855651 (U.S. EPA ECHO) Agency record
Severity 1.5
Stream Works Inc - 2008 Dupuyer Creek 318 Permit, Bynum
NPDES wastewater discharge permit.
EPA FRS registry ID 110037279058 (U.S. EPA ECHO) Agency record
Severity 1.5
Tca Inc - Muddy Creek 318 Permit, Choteau
NPDES wastewater discharge permit.
EPA FRS registry ID 110038440121 (U.S. EPA ECHO) Agency record
Severity 1.5
3 Rivers Telephone Coop - Power Ftth, Power
NPDES wastewater discharge permit.
EPA FRS registry ID 110043481194 (U.S. EPA ECHO) Agency record
Severity 1.5
Montana Fwp Highwood Creek Smith Creek 308, Choteau
NPDES wastewater discharge permit.
EPA FRS registry ID 110043747327 (U.S. EPA ECHO) Agency record
Severity 1.5
On Site Management - Diamond 4d Ranch, Choteau
NPDES wastewater discharge permit.
EPA FRS registry ID 110044250510 (U.S. EPA ECHO) Agency record
Severity 1.5
Primary Petroleum - Bills Coulee 16-19-27-6, Pendroy
NPDES wastewater discharge permit.
EPA FRS registry ID 110044252821 (U.S. EPA ECHO) Agency record
Severity 1.5
Primary Petroleum - Spring Hill 14-34-27-6, Pendroy
NPDES wastewater discharge permit.
EPA FRS registry ID 110044252830 (U.S. EPA ECHO) Agency record
Severity 1.5
Lauren Engineers And Constructors - Modular Assembly Yard, Bynum
NPDES wastewater discharge permit.
EPA FRS registry ID 110044902683 (U.S. EPA ECHO) Agency record
Severity 1.5
Primary Petroleum - Dupuyer Ridge 16-35-28-8, Pendroy
NPDES wastewater discharge permit.
EPA FRS registry ID 110044902807 (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 Teton 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 Teton 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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