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Tripp County, South Dakota: environmental and disease records

Cancer mortality in Tripp County is 136.2 deaths per 100,000 people per year against a U.S. rate of 143.2. Federal databases place 18 regulated facilities, sites and hazards inside the county, led by NPDES wastewater discharge permit (8), Gas station (mapped facility) (4), Brownfield property (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: 43.3822, -99.874.

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 Tripp County compared with the United States
Cancer	Measure	County rate	U.S. rate	Times U.S.	95% interval	Years
Lung & bronchus	New cases	58.4	51.8	1.13x	37.7 to 88.5	2019-2023
All cancer	Deaths	136.2	143.2	0.95x	102.6 to 178.6	2020-2024
All cancer	New cases	410.2	453.4	0.9x	346.6 to 483.2	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 Tripp County
Measure	County	U.S. median	Difference	Unit
Premature death	13,289.6	9,842.6	+35%	years of life lost before age 75 per 100,000
Life expectancy	74.5	75.3	-1%	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	138.5	96.9	+43%	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.

Formaldehyde11.44 per million
Carbon Tetrachloride2.83 per million
Acetaldehyde0.79 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

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

NPDES wastewater discharge permit8
Gas station (mapped facility)4
Brownfield property2
Commercial airport1
Auto repair or body shop (mapped facility)1
Heliport1
Landfill (mapped facility)1

Highest-severity records

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

Former Deb'S Treats, Winner
Brownfield property.
EPA FRS registry ID 110071969586 (U.S. EPA Brownfields (ACRES)) Agency record
Severity 3
Wild West C-Store, Winner
Brownfield property.
EPA FRS registry ID 110072219138 (U.S. EPA Brownfields (ACRES)) Agency record
Severity 3
Colome, City Of, Colome
NPDES wastewater discharge permit.
EPA FRS registry ID 110010952406 (U.S. EPA ECHO) Agency record
Severity 2
Winner Rgnl, Winner
Commercial airport. O.
Record ID ICR (FAA / U.S. DOT)
Severity 2
Landfill
Landfill (mapped facility). Mapped facility presence only; no compliance or exposure measurements.
Record ID way/1330400074 (OpenStreetMap contributors) Agency record
Severity 2
Winner - City Of, Winner
NPDES wastewater discharge permit.
EPA FRS registry ID 110006663075 (U.S. EPA ECHO) Agency record
Severity 1.5
Winner, Community Of, Winner
NPDES wastewater discharge permit.
EPA FRS registry ID 110020144084 (U.S. EPA ECHO) Agency record
Severity 1.5
Community Of Ideal Wwtf, Ideal
NPDES wastewater discharge permit.
EPA FRS registry ID 110028184042 (U.S. EPA ECHO) Agency record
Severity 1.5
Winner Regional Heathcare Center Expansion & Renov, Winner
NPDES wastewater discharge permit.
EPA FRS registry ID 110035430655 (U.S. EPA ECHO) Agency record
Severity 1.5
Winner, City Of (Wtp), Winner
NPDES wastewater discharge permit.
EPA FRS registry ID 110041923050 (U.S. EPA ECHO) Agency record
Severity 1.5
Dougherty Cattle Co, Colome
NPDES wastewater discharge permit.
EPA FRS registry ID 110071279920 (U.S. EPA ECHO) Agency record
Severity 1.5
Pcn 08na, Colome
NPDES wastewater discharge permit.
EPA FRS registry ID 110071951197 (U.S. EPA ECHO) Agency record
Severity 1.5
Sinclair
Gas station (mapped facility). Mapped facility presence only; no compliance or exposure measurements.
Record ID node/12319350842 (OpenStreetMap contributors) Agency record
Severity 1
Cenex
Gas station (mapped facility). Mapped facility presence only; no compliance or exposure measurements.
Record ID way/1331129403 (OpenStreetMap contributors) Agency record
Severity 1
Mel's Automotive
Auto repair or body shop (mapped facility). Mapped facility presence only; no compliance or exposure measurements.
Record ID way/1331129406 (OpenStreetMap contributors) Agency record
Severity 1
Gus Stop
Gas station (mapped facility). Mapped facility presence only; no compliance or exposure measurements.
Record ID way/1331129411 (OpenStreetMap contributors) Agency record
Severity 1
Casey's General Store
Gas station (mapped facility). Mapped facility presence only; no compliance or exposure measurements.
Record ID way/769502793 (OpenStreetMap contributors) Agency record
Severity 1
Keystone Xl Colome, Colome
Heliport. O.
Record ID SD08 (FAA / U.S. DOT)
Severity 0.5

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 Tripp 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 Tripp 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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