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McCone County, Montana: environmental and disease records

Federal databases place 40 regulated facilities, sites and hazards inside the county, led by NPDES wastewater discharge permit (24), Gas station (mapped facility) (5), Brownfield property (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: 47.5736, -105.8123.

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 McCone County compared with the United States
Cancer	Measure	County rate	U.S. rate	Times U.S.	95% interval	Years
All cancer	New cases	467.4	453.4	1.03x	343.3 to 625.5	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 McCone County
Measure	County	U.S. median	Difference	Unit
Premature death	n/a	9,842.6	n/a	years of life lost before age 75 per 100,000
Life expectancy	83.5	75.3	+11%	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	142.6	96.9	+47%	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.

Formaldehyde8.7 per million
Carbon Tetrachloride2.82 per million
Acetaldehyde0.67 per million
Benzene0.5 per million

EPA Air Quality Index

No EPA air quality monitor reports daily AQI for this county.

Regulated facilities, sites and hazards by type

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

NPDES wastewater discharge permit24
Gas station (mapped facility)5
Brownfield property4
Public airport3
Air permit holder (minor source)1
Hydroelectric 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.

Town Of Circle Wwtp, Circle
NPDES wastewater discharge permit.
EPA FRS registry ID 110011047125 (U.S. EPA ECHO) Agency record
Severity 4.5
Prairie Elk Swine, Wolf Point
NPDES wastewater discharge permit.
EPA FRS registry ID 110038447437 (U.S. EPA ECHO) Agency record
Severity 4
Chs Nutrition - Circle, Circle
TRI reporting facility.
EPA FRS registry ID 110071948429 (U.S. EPA ECHO) Agency record
Severity 4
Mccone County Hospital, Circle
Brownfield property.
EPA FRS registry ID 110038763255 (U.S. EPA Brownfields (ACRES)) Agency record
Severity 3
Mccone County Health Center, Circle
Brownfield property.
EPA FRS registry ID 110071971713 (U.S. EPA Brownfields (ACRES)) Agency record
Severity 3
Lone Star Motel, Circle
Brownfield property.
EPA FRS registry ID 110071973109 (U.S. EPA Brownfields (ACRES)) Agency record
Severity 3
Former Circle Bulk Plant, Circle
Brownfield property.
EPA FRS registry ID 110071975902 (U.S. EPA Brownfields (ACRES)) Agency record
Severity 3
Chs Nutrition - Circle, Circle
Toxic chemical release facility (TRI). Chemicals: Propylene.
TRI facility ID 5921WCHSNT115AA (U.S. EPA Toxics Release Inventory)
Severity 3
Circle Town County, Circle
Public airport. O.
Record ID 4U6 (FAA / U.S. DOT)
Severity 2
Flowing Wells - East & West, Brockway
NPDES wastewater discharge permit.
EPA FRS registry ID 110071903586 (U.S. EPA ECHO) Agency record
Severity 1.8
West Of Brockway - West, Brockway
NPDES wastewater discharge permit.
EPA FRS registry ID 110072147451 (U.S. EPA ECHO) Agency record
Severity 1.8
Mccone County Conservation Dist Missouri River 318 Permit, Vida
NPDES wastewater discharge permit.
EPA FRS registry ID 110030484152 (U.S. EPA ECHO) Agency record
Severity 1.5
Mccone County Conservation Dist - Missouri River 318 Permit, Wolf Point
NPDES wastewater discharge permit.
EPA FRS registry ID 110035855483 (U.S. EPA ECHO) Agency record
Severity 1.5
Martin Construction Mdt Mccone County Culvert 318, Wolf Point
NPDES wastewater discharge permit.
EPA FRS registry ID 110039187288 (U.S. EPA ECHO) Agency record
Severity 1.5
Town Of Circle - Waste Water Treatment Facilities Rehab, Circle
NPDES wastewater discharge permit.
EPA FRS registry ID 110040080863 (U.S. EPA ECHO) Agency record
Severity 1.5
Asi Constructors - Fort Peck Plunge Poole, Fort Peck
NPDES wastewater discharge permit.
EPA FRS registry ID 110055203792 (U.S. EPA ECHO) Agency record
Severity 1.5
Drl Corporation - Spillway And Support Structure Roads And Drains, Fort Peck
NPDES wastewater discharge permit.
EPA FRS registry ID 110055251230 (U.S. EPA ECHO) Agency record
Severity 1.5
T And T Contracting - Installation Of Culverts - Skull Creek, Brockway
NPDES wastewater discharge permit.
EPA FRS registry ID 110056149412 (U.S. EPA ECHO) Agency record
Severity 1.5
Riverside Contracting - Brockway Unnamed Tributary, Brockway
NPDES wastewater discharge permit.
EPA FRS registry ID 110062666066 (U.S. EPA ECHO) Agency record
Severity 1.5
Transcanada Keystone Pipeline Mccone County 318, Circle
NPDES wastewater discharge permit.
EPA FRS registry ID 110064625482 (U.S. EPA ECHO) Agency record
Severity 1.5
Less Than Thresholdmultiple County, Fort Peck
NPDES wastewater discharge permit.
EPA FRS registry ID 110070104962 (U.S. EPA ECHO) Agency record
Severity 1.5
Storage Connection Llc, Brockway
NPDES wastewater discharge permit.
EPA FRS registry ID 110070713823 (U.S. EPA ECHO) Agency record
Severity 1.5
Mccone County Stockpile/Pug Mill, Brockway
NPDES wastewater discharge permit.
EPA FRS registry ID 110070925060 (U.S. EPA ECHO) Agency record
Severity 1.5
Circle Nw, Circle
NPDES wastewater discharge permit.
EPA FRS registry ID 110071944686 (U.S. EPA ECHO) Agency record
Severity 1.5
Fort Peck Powerhouse, Fort Peck
NPDES wastewater discharge permit.
EPA FRS registry ID 110072131467 (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 McCone 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 McCone 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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