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Stanley County, South Dakota: environmental and disease records

Cancer mortality in Stanley County is 141.3 deaths per 100,000 people per year against a U.S. rate of 143.2. Federal databases place 68 regulated facilities, sites and hazards inside the county, led by Rail grade crossing (44), NPDES wastewater discharge permit (20), Public airport (2). 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: 44.4757, -100.8679.

How this county ranks in South Dakota

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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 Stanley County compared with the United States
Cancer	Measure	County rate	U.S. rate	Times U.S.	95% interval	Years
All cancer	New cases	487	453.4	1.07x	395.2 to 595.9	2019-2023
All cancer	Deaths	141.3	143.2	0.99x	96.7 to 202.7	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 Stanley County
Measure	County	U.S. median	Difference	Unit
Premature death	10,948.6	9,842.6	+11%	years of life lost before age 75 per 100,000
Life expectancy	78.6	75.3	+4%	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	72	96.9	-26%	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.

Formaldehyde10.63 per million
Carbon Tetrachloride2.88 per million
Acetaldehyde0.75 per million
Benzene0.52 per million

EPA Air Quality Index

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

Regulated facilities, sites and hazards by type

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

Rail grade crossing44
NPDES wastewater discharge permit20
Public airport2
Major air pollution source1
Oil-fired 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.

Ft. Pierre, Fort Pierre
Oil-fired power plant.
Record ID 56148 (U.S. Energy Information Administration)
Severity 4
Fort Pierre Power And Light, Fort Pierre
Major air pollution source.
EPA FRS registry ID 110038106581 (U.S. EPA ECHO) Agency record
Severity 4
Ft Pierre - City Of, Fort Pierre
NPDES wastewater discharge permit.
EPA FRS registry ID 110006663253 (U.S. EPA ECHO) Agency record
Severity 2.3
Mni Wiconi Rws (Wtp), Fort Pierre
NPDES wastewater discharge permit.
EPA FRS registry ID 110046338691 (U.S. EPA ECHO) Agency record
Severity 1.5
Lookout Ridge Commercial Development, Ft. Pierre
NPDES wastewater discharge permit.
EPA FRS registry ID 110071279027 (U.S. EPA ECHO) Agency record
Severity 1.5
Pcn 03wn, Pierre
NPDES wastewater discharge permit.
EPA FRS registry ID 110071280565 (U.S. EPA ECHO) Agency record
Severity 1.5
Fort Pierre Wastewater Treatment Improvements, Fort Pierre
NPDES wastewater discharge permit.
EPA FRS registry ID 110071321454 (U.S. EPA ECHO) Agency record
Severity 1.5
Drifters Restaurant & Convention Center, Fort Pierre
NPDES wastewater discharge permit.
EPA FRS registry ID 110071322772 (U.S. EPA ECHO) Agency record
Severity 1.5
Bad River Ranches Awms, Ft. Pierre
NPDES wastewater discharge permit.
EPA FRS registry ID 110071323736 (U.S. EPA ECHO) Agency record
Severity 1.5
Pp7 - Ft Pierre - Senior Living Facility, Ft Pierre
NPDES wastewater discharge permit.
EPA FRS registry ID 110071377463 (U.S. EPA ECHO) Agency record
Severity 1.5
Pcn 06x7, Hayes
NPDES wastewater discharge permit.
EPA FRS registry ID 110071896509 (U.S. EPA ECHO) Agency record
Severity 1.5
Morris Inc Hwy. 1806 Lots, Fort Pierre
NPDES wastewater discharge permit.
EPA FRS registry ID 110071903685 (U.S. EPA ECHO) Agency record
Severity 1.5
Pcn 06qp, Ft. Pierre
NPDES wastewater discharge permit.
EPA FRS registry ID 110071911531 (U.S. EPA ECHO) Agency record
Severity 1.5
Stanley County Track & Field, Fort Pierre
NPDES wastewater discharge permit.
EPA FRS registry ID 110071942669 (U.S. EPA ECHO) Agency record
Severity 1.5
Osrwss Mini Wiconi South Coreline 1, Fort Pierre
NPDES wastewater discharge permit.
EPA FRS registry ID 110071961014 (U.S. EPA ECHO) Agency record
Severity 1.5
City Of Fort Pierre Tatanka Trail, Fort Pierre
NPDES wastewater discharge permit.
EPA FRS registry ID 110072133405 (U.S. EPA ECHO) Agency record
Severity 1.5
Pcn 08rr, Ft. Pierre
NPDES wastewater discharge permit.
EPA FRS registry ID 110072143847 (U.S. EPA ECHO) Agency record
Severity 1.5
City Of Fort Pierre Lagoon Improvements, Fort Pierre
NPDES wastewater discharge permit.
EPA FRS registry ID 110072150546 (U.S. EPA ECHO) Agency record
Severity 1.5
Sd Gfp - Oahe Downstream Recreation Area, Fort Pierre
NPDES wastewater discharge permit.
EPA FRS registry ID 110072157004 (U.S. EPA ECHO) Agency record
Severity 1.5
Oglala Sioux Rural Water Supply System, Fort Pierre
NPDES wastewater discharge permit.
EPA FRS registry ID 110072160117 (U.S. EPA ECHO) Agency record
Severity 1.5
Oahe Dam Spillway Rehabilitation, Fort Pierre
NPDES wastewater discharge permit.
EPA FRS registry ID 110072162381 (U.S. EPA ECHO) Agency record
Severity 1.5
Ft. Pierre Hotel, Fort Pierre
NPDES wastewater discharge permit.
EPA FRS registry ID x231dd6c8e77a21ac7721a1522da3ee04 (U.S. EPA ECHO) Agency record
Severity 1.5
Us 14, Fort Pierre
Rail grade crossing.
Record ID 189856F (Federal Railroad Administration)
Severity 1.3
Stanley Avenue, Fort Pierre
Rail grade crossing.
Record ID 189857M (Federal Railroad Administration)
Severity 1.3
7th Avenue, Fort Pierre
Rail grade crossing.
Record ID 189858U (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 Stanley County

South Dakota 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 Stanley County, and their findings.
South Dakota vital statistics office
Death certificate counts by cause of death and residence tract or ZIP code, and the years behind the mortality measures above.
South Dakota health department, environmental epidemiology
Health consultations or assessments by ATSDR or the state health department covering the county, and any exposure investigations.
South Dakota 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.
South Dakota 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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