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Corson County, South Dakota: environmental and disease records

Cancer mortality in Corson County is 202.5 deaths per 100,000 people per year against a U.S. rate of 143.2. Federal databases place 91 regulated facilities, sites and hazards inside the county, led by Rail grade crossing (58), NPDES wastewater discharge permit (17), Brownfield property (12). 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: 45.7162, -101.1573.

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 Corson County compared with the United States
Cancer	Measure	County rate	U.S. rate	Times U.S.	95% interval	Years
All cancer	Deaths	202.5	143.2	1.41x	135 to 290.5	2020-2024
All cancer	New cases	339.9	453.4	0.75x	258.2 to 439	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 Corson County
Measure	County	U.S. median	Difference	Unit
Premature death	37,698.5	9,842.6	+283%	years of life lost before age 75 per 100,000
Life expectancy	58.7	75.3	-22%	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	230.2	96.9	+137%	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.

Formaldehyde10.32 per million
Carbon Tetrachloride2.86 per million
Acetaldehyde0.68 per million
Benzene0.48 per million

EPA Air Quality Index

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

Regulated facilities, sites and hazards by type

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

Rail grade crossing58
NPDES wastewater discharge permit17
Brownfield property12
Gas station (mapped facility)3
Public airport1

Highest-severity records

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

Old Smee School, Wakpala
Brownfield property.
EPA FRS registry ID 110061012238 (U.S. EPA Brownfields (ACRES)) Agency record
Severity 3
Old Smee School Teachers' Quarters, Wakpala
Brownfield property.
EPA FRS registry ID 110061012256 (U.S. EPA Brownfields (ACRES)) Agency record
Severity 3
Nape Waste Food Pantry, Mclaughlin
Brownfield property.
EPA FRS registry ID 110071963775 (U.S. EPA Brownfields (ACRES)) Agency record
Severity 3
Old Hardware Store, Mclaughlin
Brownfield property.
EPA FRS registry ID 110071963777 (U.S. EPA Brownfields (ACRES)) Agency record
Severity 3
St. Elizabeth'S Station, Wakpala
Brownfield property.
EPA FRS registry ID 110071963779 (U.S. EPA Brownfields (ACRES)) Agency record
Severity 3
257 Mato Street, Wakpala, South Dakota, Wakpala
Brownfield property.
EPA FRS registry ID 110071986338 (U.S. EPA Brownfields (ACRES)) Agency record
Severity 3
5515 Elkhorn Loop, Little Eagle, South Dakota, Little Eagle
Brownfield property.
EPA FRS registry ID 110071986340 (U.S. EPA Brownfields (ACRES)) Agency record
Severity 3
5439 Rain In The Face, Bullhead, South Dakota, Bullhead
Brownfield property.
EPA FRS registry ID 110071986341 (U.S. EPA Brownfields (ACRES)) Agency record
Severity 3
916 Cedar Avenue, Mclaughlin, South Dakota, Mc Laughlin
Brownfield property.
EPA FRS registry ID 110071986342 (U.S. EPA Brownfields (ACRES)) Agency record
Severity 3
5485 5th Street, Mclaughlin, South Dakota, Mc Laughlin
Brownfield property.
EPA FRS registry ID 110071986343 (U.S. EPA Brownfields (ACRES)) Agency record
Severity 3
5486 5th Street, Mclaughlin, South Dakota, Mc Laughlin
Brownfield property.
EPA FRS registry ID 110071986345 (U.S. EPA Brownfields (ACRES)) Agency record
Severity 3
6002 4th Street, Mclaughlin, South Dakota, Mc Laughlin
Brownfield property.
EPA FRS registry ID 110071986347 (U.S. EPA Brownfields (ACRES)) Agency record
Severity 3
Grand River Casino And Resort, Mobridge
NPDES wastewater discharge permit.
EPA FRS registry ID 110070252325 (U.S. EPA ECHO) Agency record
Severity 2.3
Wulf Cattle Depot, Mclaughlin
NPDES wastewater discharge permit.
EPA FRS registry ID 110024274747 (U.S. EPA ECHO) Agency record
Severity 2
Mc Laughlin Muni, Mc Laughlin
Public airport. O.
Record ID 5P2 (FAA / U.S. DOT)
Severity 2
Mclaughlin, City Of, Mclaughlin
NPDES wastewater discharge permit.
EPA FRS registry ID 110009841760 (U.S. EPA ECHO) Agency record
Severity 1.5
Smee School District 15-3, Wakpala
NPDES wastewater discharge permit.
EPA FRS registry ID 110015776150 (U.S. EPA ECHO) Agency record
Severity 1.5
Town Of Morristown, Morristown
NPDES wastewater discharge permit.
EPA FRS registry ID 110020142647 (U.S. EPA ECHO) Agency record
Severity 1.5
Mcintosh, City Of, Mcintosh
NPDES wastewater discharge permit.
EPA FRS registry ID 110020832900 (U.S. EPA ECHO) Agency record
Severity 1.5
Standing Rock Water Treatment Plant, Wakpala
NPDES wastewater discharge permit.
EPA FRS registry ID 110064645709 (U.S. EPA ECHO) Agency record
Severity 1.5
Mclaughlin Pump Station, Mclaughlin
NPDES wastewater discharge permit.
EPA FRS registry ID 110070567802 (U.S. EPA ECHO) Agency record
Severity 1.5
Hwy 12 Grand River Casino Water Main Relocation, Wakpala
NPDES wastewater discharge permit.
EPA FRS registry ID 110070927744 (U.S. EPA ECHO) Agency record
Severity 1.5
Nh-Ps 0012(187)106, Corson, Pcn 04fl, Mcintosh
NPDES wastewater discharge permit.
EPA FRS registry ID 110071158280 (U.S. EPA ECHO) Agency record
Severity 1.5
Sddot - 05hw Stockpile Site, Morristown
NPDES wastewater discharge permit.
EPA FRS registry ID 110071670436 (U.S. EPA ECHO) Agency record
Severity 1.5
Standing Rock Rural Water System North User Extensions Contract 4-1 Schedule 2, Mclaughlin
NPDES wastewater discharge permit.
EPA FRS registry ID 110071865603 (U.S. EPA ECHO) Agency record
Severity 1.5

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 Corson 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 Corson 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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