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Hill County, Montana: environmental and disease records

Cancer mortality in Hill County is 172.1 deaths per 100,000 people per year against a U.S. rate of 143.2, a statistically significant excess. Federal databases place 184 regulated facilities, sites and hazards inside the county, led by Rail grade crossing (72), NPDES wastewater discharge permit (49), Brownfield property (44). 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: 48.5672, -110.1235.

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 Hill County compared with the United States
Cancer	Measure	County rate	U.S. rate	Times U.S.	95% interval	Years
Thyroid	New cases	20.4	13	1.57x	11.7 to 33.1	2019-2023
Lung & bronchus	Deaths	41.6	30.2	1.38x	29.4 to 57.4	2020-2024
Leukemia	New cases	18.3	14.5	1.26x	10.5 to 29.9	2019-2023
Bladder	New cases	22.8	18.7	1.22x	14.1 to 35	2019-2023
Lung & bronchus	New cases	62.7	51.8	1.21x	47.6 to 81.3	2019-2023
All cancer	Deaths	172.1	143.2	1.2xSignificant	145.7 to 202.1	2020-2024
All cancer	New cases	443.3	453.4	0.98x	400.2 to 489.9	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 Hill County
Measure	County	U.S. median	Difference	Unit
Premature death	12,044.2	9,842.6	+22%	years of life lost before age 75 per 100,000
Life expectancy	72.9	75.3	-3%	years
Child mortality	54.5	59.8	-9%	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	94.6	96.9	-2%	deaths per 100,000
Drug overdose deaths	20.6	28.6	-28%	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.

Formaldehyde9.33 per million
Carbon Tetrachloride2.78 per million
Acetaldehyde0.85 per million
Benzene0.59 per million

EPA Air Quality Index 2025

Monitored on 304 days: 280 good, 2 unhealthy for sensitive groups or worse. Median AQI 14, peak 157.

Regulated facilities, sites and hazards by type

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

Rail grade crossing72
NPDES wastewater discharge permit49
Brownfield property44
Gas station (mapped facility)8
Public airport5
EPA air quality monitor1
Air permit holder (minor source)1
Commercial airport1
Small hazardous waste generator1
Heliport1
Scrapyard (mapped facility)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.

Northern Agricultural Research, Havre
NPDES wastewater discharge permit.
EPA FRS registry ID 110011050021 (U.S. EPA ECHO) Agency record
Severity 4.5
Unified Disposal District Landfill, Havre
NPDES wastewater discharge permit.
EPA FRS registry ID 110044273443 (U.S. EPA ECHO) Agency record
Severity 4.5
Cool Springs Colony, Rudyard
NPDES wastewater discharge permit.
EPA FRS registry ID 110070033036 (U.S. EPA ECHO) Agency record
Severity 4
Js Livestock, Havre
NPDES wastewater discharge permit.
EPA FRS registry ID 110012804661 (U.S. EPA ECHO) Agency record
Severity 3.8
East End Colony, Havre
NPDES wastewater discharge permit.
EPA FRS registry ID 110042392782 (U.S. EPA ECHO) Agency record
Severity 3.8
Hartland Colony, Havre
NPDES wastewater discharge permit.
EPA FRS registry ID 110058917481 (U.S. EPA ECHO) Agency record
Severity 3.8
Hidden Valley Colony, Gildford
NPDES wastewater discharge permit.
EPA FRS registry ID 110066891475 (U.S. EPA ECHO) Agency record
Severity 3.8
Havre Wwtf, Havre
NPDES wastewater discharge permit.
EPA FRS registry ID 110013675576 (U.S. EPA ECHO) Agency record
Severity 3.3
Short Stop, Havre
Brownfield property.
EPA FRS registry ID 110041721722 (U.S. EPA Brownfields (ACRES)) Agency record
Severity 3
Old Pastime, Rocky Boy
Brownfield property.
EPA FRS registry ID 110043082801 (U.S. EPA Brownfields (ACRES)) Agency record
Severity 3
Havre Rental, Havre
Brownfield property.
EPA FRS registry ID 110043243175 (U.S. EPA Brownfields (ACRES)) Agency record
Severity 3
Treperinas Properties, Havre
Brownfield property.
EPA FRS registry ID 110043562007 (U.S. EPA Brownfields (ACRES)) Agency record
Severity 3
Montana Agro-Energy Industrial Park, Havre
Brownfield property.
EPA FRS registry ID 110043691877 (U.S. EPA Brownfields (ACRES)) Agency record
Severity 3
5th Avenue Grind, Havre
Brownfield property.
EPA FRS registry ID 110043692910 (U.S. EPA Brownfields (ACRES)) Agency record
Severity 3
Havre Eagles Manor, Havre
Brownfield property.
EPA FRS registry ID 110071966044 (U.S. EPA Brownfields (ACRES)) Agency record
Severity 3
Boys & Girls Club, Havre
Brownfield property.
EPA FRS registry ID 110071966185 (U.S. EPA Brownfields (ACRES)) Agency record
Severity 3
Former Salvation Army Church, Havre
Brownfield property.
EPA FRS registry ID 110071966239 (U.S. EPA Brownfields (ACRES)) Agency record
Severity 3
Bullhook Community Health Center, Inc, Havre
Brownfield property.
EPA FRS registry ID 110071966480 (U.S. EPA Brownfields (ACRES)) Agency record
Severity 3
Old Police Department, Rocky Boy
Brownfield property.
EPA FRS registry ID 110071967718 (U.S. EPA Brownfields (ACRES)) Agency record
Severity 3
Boxcars, Havre
Brownfield property.
EPA FRS registry ID 110071969183 (U.S. EPA Brownfields (ACRES)) Agency record
Severity 3
Montana State University - Northern: Donaldson Hal, Havre
Brownfield property.
EPA FRS registry ID 110071969184 (U.S. EPA Brownfields (ACRES)) Agency record
Severity 3
Montana State University - Northern: Morgan Hall, Havre
Brownfield property.
EPA FRS registry ID 110071969185 (U.S. EPA Brownfields (ACRES)) Agency record
Severity 3
Dry Fork Farm, Box Elder
Brownfield property.
EPA FRS registry ID 110071969650 (U.S. EPA Brownfields (ACRES)) Agency record
Severity 3
Agency Road Property, Box Elder
Brownfield property.
EPA FRS registry ID 110071969651 (U.S. EPA Brownfields (ACRES)) Agency record
Severity 3
Duck Creek Wildcat Dump, Box Elder
Brownfield property.
EPA FRS registry ID 110071969653 (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 Hill 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 Hill 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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