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Stillwater County, Montana: environmental and disease records

Cancer mortality in Stillwater County is 119.4 deaths per 100,000 people per year against a U.S. rate of 143.2. Federal databases place 118 regulated facilities, sites and hazards inside the county, led by NPDES wastewater discharge permit (45), Rail grade crossing (32), Gas station (mapped facility) (9). 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: 45.6502, -109.2129.

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 Stillwater County compared with the United States
Cancer	Measure	County rate	U.S. rate	Times U.S.	95% interval	Years
Melanoma of the skin	New cases	49.4	23.8	2.08xSignificant	32.7 to 72.5	2019-2023
Bladder	New cases	22.2	18.7	1.19x	12.9 to 37.6	2019-2023
All cancer	New cases	536.6	453.4	1.18xSignificant	479.5 to 599.5	2019-2023
Lung & bronchus	Deaths	28.8	30.2	0.95x	18 to 45.3	2020-2024
All cancer	Deaths	119.4	143.2	0.83x	95.1 to 149.1	2020-2024
Lung & bronchus	New cases	40.9	51.8	0.79x	28.3 to 59.1	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 Stillwater County
Measure	County	U.S. median	Difference	Unit
Premature death	8,534.1	9,842.6	-13%	years of life lost before age 75 per 100,000
Life expectancy	77.5	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	95.2	96.9	-2%	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.

Formaldehyde9.24 per million
Carbon Tetrachloride2.64 per million
Acetaldehyde0.9 per million
Pahpom0.69 per million

EPA Air Quality Index

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

Regulated facilities, sites and hazards by type

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

NPDES wastewater discharge permit45
Rail grade crossing32
Gas station (mapped facility)9
Public airport7
Brownfield property4
Air permit holder (minor source)3
Scrapyard (mapped facility)3
TRI reporting facility3
Toxic chemical release facility (TRI)3
Major air pollution source2
Small hazardous waste generator2
Auto repair or body shop (mapped facility)1
Large hazardous waste generator1
Hydroelectric plant1
Wind power plant1
Superfund (NPL) site1

Highest-severity records

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

Mouat Industries, Columbus
Superfund (NPL) site. Hazard Ranking System score 31.7. NPL Site.
EPA site ID MTD021997689 (U.S. EPA Superfund (SEMS/NPL)) Agency record
Severity 10
Smc Nye Mine Site, Nye
Toxic chemical release facility (TRI). Chemicals: Methanol, Nickel And Nickel Compounds, Nitrate compounds (water dissociable; reportable only when in aqueous solution), Lead And Lead Compounds and 4 more. Reports carcinogens. 1,158,429 lbs released over 5 years.
TRI facility ID 59061SMCNY5MILE (U.S. EPA Toxics Release Inventory)
Severity 9.2
Smc Nye Mine Site, Nye
TRI reporting facility.
EPA FRS registry ID 110000595133 (U.S. EPA ECHO) Agency record
Severity 9
Montana Silversmiths, Columbus
Toxic chemical release facility (TRI). Chemicals: Dichloromethane. Reports carcinogens. 28,485 lbs released over 5 years.
TRI facility ID 59019MNTNS1STER (U.S. EPA Toxics Release Inventory)
Severity 7.9
Smc Precious Metals Smelter & Base Metals Refinery, Columbus
Toxic chemical release facility (TRI). Chemicals: Copper And Copper Compounds, Nickel And Nickel Compounds, Nickel compounds, Chromium compounds (except for chromite ore mined in the Transvaal Region) and 4 more. Reports carcinogens. 2,767 lbs released over 5 years.
TRI facility ID 59019STLLW1209L (U.S. EPA Toxics Release Inventory)
Severity 7.1
Smc Nye Mine Site, Nye
Major air pollution source.
EPA FRS registry ID 110000595133 (U.S. EPA ECHO) Agency record
Severity 6
Montana Silversmiths Inc, Columbus
TRI reporting facility.
EPA FRS registry ID 110011675106 (U.S. EPA ECHO) Agency record
Severity 6
Smc Nye Mine Site, Nye
NPDES wastewater discharge permit.
EPA FRS registry ID 110000595133 (U.S. EPA ECHO) Agency record
Severity 5.5
Smc Precious Metals Smelter & Base Metal Refy, Columbus
TRI reporting facility.
EPA FRS registry ID 110000606096 (U.S. EPA ECHO) Agency record
Severity 5.2
Absarokee Sewer District Wwtp, Absarokee
NPDES wastewater discharge permit.
EPA FRS registry ID 110009860472 (U.S. EPA ECHO) Agency record
Severity 4.5
Town Of Columbus - Waste Water Treatment Facility, Columbus
NPDES wastewater discharge permit.
EPA FRS registry ID 110056410183 (U.S. EPA ECHO) Agency record
Severity 4.5
Montana Silversmiths Inc, Columbus
Major air pollution source.
EPA FRS registry ID 110011675106 (U.S. EPA ECHO) Agency record
Severity 3.8
T & C Cattle Feeders Inc - Feedlots, Park City
NPDES wastewater discharge permit.
EPA FRS registry ID 110037117848 (U.S. EPA ECHO) Agency record
Severity 3.8
Montana Silversmiths Inc, Columbus
NPDES wastewater discharge permit.
EPA FRS registry ID 110011675106 (U.S. EPA ECHO) Agency record
Severity 3.3
Columbus Airstrip, Columbus
Brownfield property.
EPA FRS registry ID 110038755763 (U.S. EPA Brownfields (ACRES)) Agency record
Severity 3
Stillwater County Former Hospital, Columbus
Brownfield property.
EPA FRS registry ID 110071977029 (U.S. EPA Brownfields (ACRES)) Agency record
Severity 3
Drain Properties, Columbus
Brownfield property.
EPA FRS registry ID 110071977977 (U.S. EPA Brownfields (ACRES)) Agency record
Severity 3
Beehive School, Nye
Brownfield property.
EPA FRS registry ID 110071984346 (U.S. EPA Brownfields (ACRES)) Agency record
Severity 3
Columbus Processing Facility, Columbus
Large hazardous waste generator.
EPA FRS registry ID 110072171930 (U.S. EPA ECHO) Agency record
Severity 3
Stillwater Mine, Nye
NPDES wastewater discharge permit.
EPA FRS registry ID 110072171908 (U.S. EPA ECHO) Agency record
Severity 2.8
Mt Marion, Columbus
NPDES wastewater discharge permit.
EPA FRS registry ID 110071435670 (U.S. EPA ECHO) Agency record
Severity 2.5
Park City County Wastewater Treatment Facility, Park City
NPDES wastewater discharge permit.
EPA FRS registry ID 110070204023 (U.S. EPA ECHO) Agency record
Severity 2.3
419 Bridge Scour Repair, Absarokee
NPDES wastewater discharge permit.
EPA FRS registry ID 110071896658 (U.S. EPA ECHO) Agency record
Severity 2
Woltermann Meml, Columbus
Public airport. O.
Record ID 6S3 (FAA / U.S. DOT)
Severity 2
Bullseye Feedlot - Park City Unit, Park City
NPDES wastewater discharge permit.
EPA FRS registry ID 110011049686 (U.S. EPA ECHO) Agency record
Severity 1.8

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 Stillwater 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 Stillwater 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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