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Golden Valley County, Montana: environmental and disease records

Cancer mortality in Golden Valley County is 179.2 deaths per 100,000 people per year against a U.S. rate of 143.2. Federal databases place 31 regulated facilities, sites and hazards inside the county, led by NPDES wastewater discharge permit (17), Rail grade crossing (9), Public airport (2). 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: 46.4127, -109.1324.

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 Golden Valley County compared with the United States
Cancer	Measure	County rate	U.S. rate	Times U.S.	95% interval	Years
All cancer	Deaths	179.2	143.2	1.25x	103.8 to 323.7	2020-2024
All cancer	New cases	443.4	453.4	0.98x	293 to 665.7	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 Golden Valley County
Measure	County	U.S. median	Difference	Unit
Premature death	11,220.1	9,842.6	+14%	years of life lost before age 75 per 100,000
Life expectancy	n/a	75.3	n/a	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.

Formaldehyde7.89 per million
Carbon Tetrachloride2.67 per million
Acetaldehyde0.72 per million
Pahpom0.53 per million

EPA Air Quality Index

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

Regulated facilities, sites and hazards by type

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

NPDES wastewater discharge permit17
Rail grade crossing9
Public airport2
Brownfield property1
Gas station (mapped facility)1
Solar power 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.

Cowboy Cliff Quarry, Ryegate
NPDES wastewater discharge permit.
EPA FRS registry ID 110070625388 (U.S. EPA ECHO) Agency record
Severity 4.5
Golden Valley Colony, Ryegate
NPDES wastewater discharge permit.
EPA FRS registry ID 110009860846 (U.S. EPA ECHO) Agency record
Severity 3.8
Lavina School, Lavina
Brownfield property.
EPA FRS registry ID 110071986368 (U.S. EPA Brownfields (ACRES)) Agency record
Severity 3
Venture Stone Site 14, Ryegate
NPDES wastewater discharge permit.
EPA FRS registry ID 110071375911 (U.S. EPA ECHO) Agency record
Severity 2.5
Venture Stone Site 15, Ryegate
NPDES wastewater discharge permit.
EPA FRS registry ID 110071404498 (U.S. EPA ECHO) Agency record
Severity 2.5
Lavina, Lavina
Public airport. O.
Record ID 80S (FAA / U.S. DOT)
Severity 2
Ryegate, Ryegate
Public airport. O.
Record ID 8U0 (FAA / U.S. DOT)
Severity 2
Town Of Lavina Wwtf, Lavina
NPDES wastewater discharge permit.
EPA FRS registry ID 110009860613 (U.S. EPA ECHO) Agency record
Severity 1.8
Ryegate Wwtp, Ryegate
NPDES wastewater discharge permit.
EPA FRS registry ID 110039827863 (U.S. EPA ECHO) Agency record
Severity 1.5
Tamietti Construction - Mdot Musselshell River Mk Me Of Cushman Br9019(12), Cushman
NPDES wastewater discharge permit.
EPA FRS registry ID 110044259511 (U.S. EPA ECHO) Agency record
Severity 1.5
Tamietti Construction Mdot Musselshell River Belfry North 318, Cushman
NPDES wastewater discharge permit.
EPA FRS registry ID 110044270650 (U.S. EPA ECHO) Agency record
Severity 1.5
Steve Harmon Musselshell River Bridge Rehab, Lavina
NPDES wastewater discharge permit.
EPA FRS registry ID 110055041413 (U.S. EPA ECHO) Agency record
Severity 1.5
Stillwater Excavating Golden Valley Sites, Ryegate
NPDES wastewater discharge permit.
EPA FRS registry ID 110055637280 (U.S. EPA ECHO) Agency record
Severity 1.5
Frontier West - Fish Creek - Ryegate Mt, Ryegate
NPDES wastewater discharge permit.
EPA FRS registry ID 110062666173 (U.S. EPA ECHO) Agency record
Severity 1.5
Golden Valley County - Big Coulee Creek - Lavina, Lavina
NPDES wastewater discharge permit.
EPA FRS registry ID 110064622573 (U.S. EPA ECHO) Agency record
Severity 1.5
Judith Gap North And South 318 Permit, Judith Gap
NPDES wastewater discharge permit.
EPA FRS registry ID 110064637237 (U.S. EPA ECHO) Agency record
Severity 1.5
Mid-River'S 2021 North Ryegate Exchange Project, Ryegate
NPDES wastewater discharge permit.
EPA FRS registry ID 110070891953 (U.S. EPA ECHO) Agency record
Severity 1.5
Es Stone: Site #1 (Vander Voort), Ryegate
NPDES wastewater discharge permit.
EPA FRS registry ID 110070938376 (U.S. EPA ECHO) Agency record
Severity 1.5
Town Of Ryegate, Ryegate
NPDES wastewater discharge permit.
EPA FRS registry ID 110071364497 (U.S. EPA ECHO) Agency record
Severity 1.5
S-238/S-300-Ryegate, Ryegate
NPDES wastewater discharge permit.
EPA FRS registry ID 110072248034 (U.S. EPA ECHO) Agency record
Severity 1.5
Ryegate Nw 10mi, Cushman
Rail grade crossing.
Record ID 088412H (Federal Railroad Administration)
Severity 1.2
Private, Cushman
Rail grade crossing.
Record ID 088416K (Federal Railroad Administration)
Severity 1.2
Nine Mile Rd, Cushman
Rail grade crossing.
Record ID 088417S (Federal Railroad Administration)
Severity 1.2
Cushman Rd, Cushman
Rail grade crossing.
Record ID 088421G (Federal Railroad Administration)
Severity 1.2
Cushman Se 17mi, Cushman
Rail grade crossing.
Record ID 088422N (Federal Railroad Administration)
Severity 1.2

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 Golden Valley 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 Golden Valley 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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