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Musselshell County, Montana: environmental and disease records

Cancer mortality in Musselshell County is 141.4 deaths per 100,000 people per year against a U.S. rate of 143.2. Federal databases place 66 regulated facilities, sites and hazards inside the county, led by Brownfield property (24), NPDES wastewater discharge permit (24), Rail grade crossing (13). 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: 46.4235, -108.3216.

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 Musselshell County compared with the United States
Cancer	Measure	County rate	U.S. rate	Times U.S.	95% interval	Years
Lung & bronchus	Deaths	36.4	30.2	1.21x	20.4 to 63.4	2020-2024
All cancer	New cases	538.7	453.4	1.19xSignificant	462.1 to 626	2019-2023
All cancer	Deaths	141.4	143.2	0.99x	106.7 to 186.1	2020-2024
Lung & bronchus	New cases	49.7	51.8	0.96x	30.5 to 79.9	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 Musselshell County
Measure	County	U.S. median	Difference	Unit
Premature death	9,830.6	9,842.6	-0%	years of life lost before age 75 per 100,000
Life expectancy	76.1	75.3	+1%	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	158	96.9	+63%	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.

Formaldehyde10.2 per million
Carbon Tetrachloride2.71 per million
Naphthalene1.04 per million
Acetaldehyde1.04 per million

EPA Air Quality Index

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

Regulated facilities, sites and hazards by type

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

Brownfield property24
NPDES wastewater discharge permit24
Rail grade crossing13
Air permit holder (minor source)2
Gas station (mapped facility)2
Commercial airport1

Highest-severity records

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

Foster Ranch Feedlot, Melstone
NPDES wastewater discharge permit.
EPA FRS registry ID 110012748768 (U.S. EPA ECHO) Agency record
Severity 3.8
Roundup Meth House, Roundup
Brownfield property.
EPA FRS registry ID 110040661147 (U.S. EPA Brownfields (ACRES)) Agency record
Severity 3
Farmer'S Union, Roundup
Brownfield property.
EPA FRS registry ID 110043361947 (U.S. EPA Brownfields (ACRES)) Agency record
Severity 3
Former Roundup Farmers Union, Roundup
Brownfield property.
EPA FRS registry ID 110071966129 (U.S. EPA Brownfields (ACRES)) Agency record
Severity 3
Roundup 3, Roundup
Brownfield property.
EPA FRS registry ID 110071972223 (U.S. EPA Brownfields (ACRES)) Agency record
Severity 3
Roundup 4, Roundup
Brownfield property.
EPA FRS registry ID 110071972224 (U.S. EPA Brownfields (ACRES)) Agency record
Severity 3
Roundup 5, Roundup
Brownfield property.
EPA FRS registry ID 110071972225 (U.S. EPA Brownfields (ACRES)) Agency record
Severity 3
Roundup 6, Roundup
Brownfield property.
EPA FRS registry ID 110071972226 (U.S. EPA Brownfields (ACRES)) Agency record
Severity 3
Roundup 7, Roundup
Brownfield property.
EPA FRS registry ID 110071972227 (U.S. EPA Brownfields (ACRES)) Agency record
Severity 3
Roundup 22, Roundup
Brownfield property.
EPA FRS registry ID 110071972228 (U.S. EPA Brownfields (ACRES)) Agency record
Severity 3
Roundup 24, Roundup
Brownfield property.
EPA FRS registry ID 110071972229 (U.S. EPA Brownfields (ACRES)) Agency record
Severity 3
Roundup 25, Roundup
Brownfield property.
EPA FRS registry ID 110071972230 (U.S. EPA Brownfields (ACRES)) Agency record
Severity 3
Roundup 29, Roundup
Brownfield property.
EPA FRS registry ID 110071972231 (U.S. EPA Brownfields (ACRES)) Agency record
Severity 3
Roundup 31, Roundup
Brownfield property.
EPA FRS registry ID 110071972232 (U.S. EPA Brownfields (ACRES)) Agency record
Severity 3
Wier Building, Roundup
Brownfield property.
EPA FRS registry ID 110071972545 (U.S. EPA Brownfields (ACRES)) Agency record
Severity 3
Roundup 36, Roundup
Brownfield property.
EPA FRS registry ID 110071973224 (U.S. EPA Brownfields (ACRES)) Agency record
Severity 3
Roundup 33, Roundup
Brownfield property.
EPA FRS registry ID 110071973225 (U.S. EPA Brownfields (ACRES)) Agency record
Severity 3
Roundup 37, Roundup
Brownfield property.
EPA FRS registry ID 110071973226 (U.S. EPA Brownfields (ACRES)) Agency record
Severity 3
Roundup 38, Roundup
Brownfield property.
EPA FRS registry ID 110071973227 (U.S. EPA Brownfields (ACRES)) Agency record
Severity 3
Roundup 42, Roundup
Brownfield property.
EPA FRS registry ID 110071973228 (U.S. EPA Brownfields (ACRES)) Agency record
Severity 3
Arena Cafe And Sporting Goods, Roundup
Brownfield property.
EPA FRS registry ID 110071973591 (U.S. EPA Brownfields (ACRES)) Agency record
Severity 3
Homes On The Range, Roundup
Brownfield property.
EPA FRS registry ID 110071978731 (U.S. EPA Brownfields (ACRES)) Agency record
Severity 3
Central School Campus, Roundroundupup
Brownfield property.
EPA FRS registry ID 110071983939 (U.S. EPA Brownfields (ACRES)) Agency record
Severity 3
Stockman Bar, Roundup
Brownfield property.
EPA FRS registry ID 110071986221 (U.S. EPA Brownfields (ACRES)) Agency record
Severity 3
The Backporch, Roundup
Brownfield property.
EPA FRS registry ID 110072080384 (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 Musselshell 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 Musselshell 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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