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Oglala Lakota County, South Dakota: environmental and disease records

Cancer mortality in Oglala Lakota County is 223.7 deaths per 100,000 people per year against a U.S. rate of 143.2, a statistically significant excess. Federal databases place 62 regulated facilities, sites and hazards inside the county, led by NPDES wastewater discharge permit (50), Brownfield property (11), Commercial airport (1). 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: 43.3291, -102.5555.

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 Oglala Lakota County compared with the United States
Cancer	Measure	County rate	U.S. rate	Times U.S.	95% interval	Years
All cancer	Deaths	223.7	143.2	1.56xSignificant	177.9 to 276.9	2020-2024
Lung & bronchus	Deaths	46.9	30.2	1.55x	26.2 to 76	2020-2024
Lung & bronchus	New cases	68.3	51.8	1.32x	43 to 101.5	2019-2023
All cancer	New cases	441.7	453.4	0.97x	380.8 to 509.2	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 Oglala Lakota County
Measure	County	U.S. median	Difference	Unit
Premature death	40,417.3	9,842.6	+311%	years of life lost before age 75 per 100,000
Life expectancy	56.9	75.3	-24%	years
Child mortality	208.1	59.8	+248%	deaths under age 18 per 100,000
Infant mortality	16.9	6.2	+172%	deaths under age 1 per 1,000 live births
Injury deaths	275.6	96.9	+184%	deaths per 100,000
Drug overdose deaths	26.7	28.6	-7%	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.

Formaldehyde10.84 per million
Carbon Tetrachloride2.71 per million
Acetaldehyde0.77 per million
Pahpom0.51 per million

EPA Air Quality Index

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

Regulated facilities, sites and hazards by type

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

NPDES wastewater discharge permit50
Brownfield property11
Commercial 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.

Pine Ridge Community Lagoon, Pine Ridge
NPDES wastewater discharge permit.
EPA FRS registry ID 110071730865 (U.S. EPA ECHO) Agency record
Severity 3.8
Kyle Landfill, Kyle
Brownfield property.
EPA FRS registry ID 110038701982 (U.S. EPA Brownfields (ACRES)) Agency record
Severity 3
Pine Ridge Landfill, Pine Ridge
Brownfield property.
EPA FRS registry ID 110038748424 (U.S. EPA Brownfields (ACRES)) Agency record
Severity 3
Porcupine Cap Building, Porcupine
Brownfield property.
EPA FRS registry ID 110040477980 (U.S. EPA Brownfields (ACRES)) Agency record
Severity 3
Ost - Carol O'Rourke Property, Pine Ridge
Brownfield property.
EPA FRS registry ID 110071965153 (U.S. EPA Brownfields (ACRES)) Agency record
Severity 3
Abandoned Home N. Of Wilson Trailer, Pine Ridge
Brownfield property.
EPA FRS registry ID 110071966060 (U.S. EPA Brownfields (ACRES)) Agency record
Severity 3
Carol O'Rourke Property, Pine Ridge
Brownfield property.
EPA FRS registry ID 110071966061 (U.S. EPA Brownfields (ACRES)) Agency record
Severity 3
Clint Black Elk Property, Pine Ridge
Brownfield property.
EPA FRS registry ID 110071966063 (U.S. EPA Brownfields (ACRES)) Agency record
Severity 3
Abandoned Yellow Garage, Pine Ridge
Brownfield property.
EPA FRS registry ID 110071966064 (U.S. EPA Brownfields (ACRES)) Agency record
Severity 3
Jom Building, Pine Ridge
Brownfield property.
EPA FRS registry ID 110071966321 (U.S. EPA Brownfields (ACRES)) Agency record
Severity 3
Old Christian Academy, Pine Ridge
Brownfield property.
EPA FRS registry ID 110071971469 (U.S. EPA Brownfields (ACRES)) Agency record
Severity 3
Old Pine Ridge Trailer Court Community, Pine Ridge
Brownfield property.
EPA FRS registry ID 110071980219 (U.S. EPA Brownfields (ACRES)) Agency record
Severity 3
Evergreen Lagoon, Porcupine
NPDES wastewater discharge permit.
EPA FRS registry ID 110020143735 (U.S. EPA ECHO) Agency record
Severity 2.8
Red Cloud Indian School, Pine Ridge
NPDES wastewater discharge permit. Penalties $2,445.
EPA FRS registry ID 110022290117 (U.S. EPA ECHO) Agency record
Severity 2.5
Porcupine District Government Building, Porcupine
NPDES wastewater discharge permit. Penalties $15,780.
EPA FRS registry ID 110071880363 (U.S. EPA ECHO) Agency record
Severity 2.5
Pine Ridge, Pine Ridge
Commercial airport. O.
Record ID IEN (FAA / U.S. DOT)
Severity 2
Oglala Lakota College Lagoon, Pine Ridge Reservation
NPDES wastewater discharge permit.
EPA FRS registry ID 110006692604 (U.S. EPA ECHO) Agency record
Severity 1.5
Rocky Ford School, Pine Ridge Reservation
NPDES wastewater discharge permit.
EPA FRS registry ID 110006692775 (U.S. EPA ECHO) Agency record
Severity 1.5
Prairie Winds Casino Wwtf, Pine Ridge
NPDES wastewater discharge permit.
EPA FRS registry ID 110006692784 (U.S. EPA ECHO) Agency record
Severity 1.5
Sharps Corner Lagoon System, Porcupine
NPDES wastewater discharge permit.
EPA FRS registry ID 110006802567 (U.S. EPA ECHO) Agency record
Severity 1.5
Batesland Community Lagoon, Batesland
NPDES wastewater discharge permit.
EPA FRS registry ID 110009791163 (U.S. EPA ECHO) Agency record
Severity 1.5
Wolf Creek School And Lakota Tech School Wwtf, Pine Ridge Reservation
NPDES wastewater discharge permit.
EPA FRS registry ID 110010672664 (U.S. EPA ECHO) Agency record
Severity 1.5
Wakpamni Community Lagoon, Wakpamni
NPDES wastewater discharge permit.
EPA FRS registry ID 110020148375 (U.S. EPA ECHO) Agency record
Severity 1.5
Wolf Creek Community Lagoon, Pine Ridge
NPDES wastewater discharge permit.
EPA FRS registry ID 110020148384 (U.S. EPA ECHO) Agency record
Severity 1.5
Wounded Knee Community Lagoon, Pine Ridge
NPDES wastewater discharge permit.
EPA FRS registry ID 110020148393 (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 Oglala Lakota 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 Oglala Lakota 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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