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Liberty County, Montana: environmental and disease records

Cancer mortality in Liberty County is 99.1 deaths per 100,000 people per year against a U.S. rate of 143.2. Federal databases place 39 regulated facilities, sites and hazards inside the county, led by Rail grade crossing (18), NPDES wastewater discharge permit (14), Brownfield property (3). 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: 48.5598, -111.0159.

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 Liberty County compared with the United States
Cancer	Measure	County rate	U.S. rate	Times U.S.	95% interval	Years
All cancer	New cases	513	453.4	1.13x	389.7 to 665.1	2019-2023
All cancer	Deaths	99.1	143.2	0.69x	51.8 to 175.6	2020-2024

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 Liberty 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	84.7	75.3	+13%	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	n/a	96.9	n/a	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.

Formaldehyde8.36 per million
Carbon Tetrachloride2.75 per million
Acetaldehyde0.77 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

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

Rail grade crossing18
NPDES wastewater discharge permit14
Brownfield property3
Public airport1
Commercial airport1
Gas station (mapped facility)1
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.

Riverview Colony - Feedlot, Chester
NPDES wastewater discharge permit.
EPA FRS registry ID 110058917267 (U.S. EPA ECHO) Agency record
Severity 3.8
Chester Dry Cleaners, Chester
Brownfield property.
EPA FRS registry ID 110071970561 (U.S. EPA Brownfields (ACRES)) Agency record
Severity 3
Chester Vets Club And Wheat Sheaf Motel, Chester
Brownfield property.
EPA FRS registry ID 110071970562 (U.S. EPA Brownfields (ACRES)) Agency record
Severity 3
Chester Motors, Chester
Brownfield property.
EPA FRS registry ID 110071980687 (U.S. EPA Brownfields (ACRES)) Agency record
Severity 3
Town Of Chester Wwtf, Chester
NPDES wastewater discharge permit.
EPA FRS registry ID 110006723162 (U.S. EPA ECHO) Agency record
Severity 2.8
Sage Creek Colony, Chester
NPDES wastewater discharge permit.
EPA FRS registry ID 110011049800 (U.S. EPA ECHO) Agency record
Severity 2.5
Tiber Dam, Tiber Dam
Public airport. O.
Record ID B70 (FAA / U.S. DOT)
Severity 2
Liberty County, Chester
Commercial airport. O.
Record ID LTY (FAA / U.S. DOT)
Severity 2
Stoddard Construction Llc Lake Elwell 318 Permit, Chester
NPDES wastewater discharge permit.
EPA FRS registry ID 110030483876 (U.S. EPA ECHO) Agency record
Severity 1.5
Century Inc - Sage Creek 318 Permit, Whitlash
NPDES wastewater discharge permit.
EPA FRS registry ID 110032593361 (U.S. EPA ECHO) Agency record
Severity 1.5
Rocky Boys North Central Montana Regional Water Sys, Chester
NPDES wastewater discharge permit.
EPA FRS registry ID 110040086108 (U.S. EPA ECHO) Agency record
Severity 1.5
Earl Fisher Bio Fuels Facility, Chester
NPDES wastewater discharge permit.
EPA FRS registry ID 110043271759 (U.S. EPA ECHO) Agency record
Severity 1.5
Liberty County Pugsley Ranches Marias River 318, Chester
NPDES wastewater discharge permit.
EPA FRS registry ID 110043479535 (U.S. EPA ECHO) Agency record
Severity 1.5
Shumaker Trucking Mdt Marias River 318, Chester
NPDES wastewater discharge permit.
EPA FRS registry ID 110043479866 (U.S. EPA ECHO) Agency record
Severity 1.5
Us Customs And Border Protection - Land Port Of Entry Whitlash Mt, Port Of Whitlash
NPDES wastewater discharge permit.
EPA FRS registry ID 110043735615 (U.S. EPA ECHO) Agency record
Severity 1.5
Gavilon Grain Llc, Chester
NPDES wastewater discharge permit.
EPA FRS registry ID 110043962227 (U.S. EPA ECHO) Agency record
Severity 1.5
Liberty County Conservation Dist Marias River 318, Chester
NPDES wastewater discharge permit.
EPA FRS registry ID 110055196247 (U.S. EPA ECHO) Agency record
Severity 1.5
Rocky Boy'S Wtp Ponds, Chester
NPDES wastewater discharge permit.
EPA FRS registry ID 110070824747 (U.S. EPA ECHO) Agency record
Severity 1.5
Rocky Boy Water Treatment Plant, Chester
NPDES wastewater discharge permit.
EPA FRS registry ID 110071707057 (U.S. EPA ECHO) Agency record
Severity 1.5
2400 Rd, Joplin
Rail grade crossing.
Record ID 059780U (Federal Railroad Administration)
Severity 1.3
Co Rd 224, Joplin
Rail grade crossing.
Record ID 059781B (Federal Railroad Administration)
Severity 1.3
Private, Joplin
Rail grade crossing.
Record ID 059783P (Federal Railroad Administration)
Severity 1.3
Co Rd, Joplin
Rail grade crossing.
Record ID 059784W (Federal Railroad Administration)
Severity 1.3
Joplin W 4 Mi, Joplin
Rail grade crossing.
Record ID 059786K (Federal Railroad Administration)
Severity 1.3
Laird Rd, Chester
Rail grade crossing.
Record ID 059788Y (Federal Railroad Administration)
Severity 1.3

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 Liberty 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 Liberty 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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