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Marshall County, South Dakota: environmental and disease records

Cancer mortality in Marshall County is 137.2 deaths per 100,000 people per year against a U.S. rate of 143.2. Federal databases place 73 regulated facilities, sites and hazards inside the county, led by Rail grade crossing (44), NPDES wastewater discharge permit (16), Brownfield property (3). 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: 45.7479, -97.6034.

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 Marshall County compared with the United States
Cancer	Measure	County rate	U.S. rate	Times U.S.	95% interval	Years
All cancer	Deaths	137.2	143.2	0.96x	100.9 to 184.7	2020-2024
All cancer	New cases	408.9	453.4	0.9x	339.9 to 489.5	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 Marshall County
Measure	County	U.S. median	Difference	Unit
Premature death	5,653.6	9,842.6	-43%	years of life lost before age 75 per 100,000
Life expectancy	79.3	75.3	+5%	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	50.8	96.9	-48%	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.

Formaldehyde11.35 per million
Carbon Tetrachloride2.92 per million
Acetaldehyde0.85 per million
Benzene0.54 per million

EPA Air Quality Index

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

Regulated facilities, sites and hazards by type

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

Rail grade crossing44
NPDES wastewater discharge permit16
Brownfield property3
Gas station (mapped facility)3
Air permit holder (minor source)2
Auto repair or body shop (mapped facility)2
Commercial airport1
TRI reporting facility1
Toxic chemical release facility (TRI)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.

Horton Inc, Britton
Toxic chemical release facility (TRI). Chemicals: Nickel, Copper, Diisocyanates. Reports carcinogens. 125 lbs released over 5 years.
TRI facility ID 57430HRTNNINDUS (U.S. EPA Toxics Release Inventory)
Severity 6.1
Horton Industries, Inc. - West, Britton
TRI reporting facility.
EPA FRS registry ID 110000594946 (U.S. EPA ECHO) Agency record
Severity 4.7
Veblen, City Of, Veblen
NPDES wastewater discharge permit.
EPA FRS registry ID 110009792377 (U.S. EPA ECHO) Agency record
Severity 3.5
Sunset Colony, Britton
NPDES wastewater discharge permit.
EPA FRS registry ID 110071711131 (U.S. EPA ECHO) Agency record
Severity 3.3
Marshall County Courthouse, Britton
Brownfield property.
EPA FRS registry ID 110071905298 (U.S. EPA Brownfields (ACRES)) Agency record
Severity 3
Watertown Precision Bombing Range, Veblen
Brownfield property.
EPA FRS registry ID 110071977039 (U.S. EPA Brownfields (ACRES)) Agency record
Severity 3
Former Livestock Sale Barn, Britton
Brownfield property.
EPA FRS registry ID 110071978233 (U.S. EPA Brownfields (ACRES)) Agency record
Severity 3
Eden, Town Of, Eden
NPDES wastewater discharge permit.
EPA FRS registry ID 110067373014 (U.S. EPA ECHO) Agency record
Severity 3
Langford, Town Of, Langford
NPDES wastewater discharge permit.
EPA FRS registry ID 110070000923 (U.S. EPA ECHO) Agency record
Severity 2
Britton Muni, Britton
Commercial airport. O.
Record ID BTN (FAA / U.S. DOT)
Severity 2
Horton Industries, Inc. - West, Britton
NPDES wastewater discharge permit.
EPA FRS registry ID 110000594946 (U.S. EPA ECHO) Agency record
Severity 1.5
Britton, City Of, Britton
NPDES wastewater discharge permit.
EPA FRS registry ID 110006692061 (U.S. EPA ECHO) Agency record
Severity 1.5
Langford Water Distribution (Wtp), Langford
NPDES wastewater discharge permit.
EPA FRS registry ID 110006692249 (U.S. EPA ECHO) Agency record
Severity 1.5
Veblen Flats Wwtf, Veblen
NPDES wastewater discharge permit.
EPA FRS registry ID 110064610933 (U.S. EPA ECHO) Agency record
Severity 1.5
Red Iron Wwtf, Red Iron Lake, Township Of
NPDES wastewater discharge permit.
EPA FRS registry ID 110064643275 (U.S. EPA ECHO) Agency record
Severity 1.5
Marshall County Healthcare Center, Britton
NPDES wastewater discharge permit.
EPA FRS registry ID 110071320433 (U.S. EPA ECHO) Agency record
Severity 1.5
Brian Peters Agricultural Waste Storage Facility, Britton
NPDES wastewater discharge permit.
EPA FRS registry ID 110071320823 (U.S. EPA ECHO) Agency record
Severity 1.5
Foster Creek Substation Grading, Raymond
NPDES wastewater discharge permit.
EPA FRS registry ID 110071323471 (U.S. EPA ECHO) Agency record
Severity 1.5
Shortfoot East Concrete Stacking Slab, Veblen
NPDES wastewater discharge permit.
EPA FRS registry ID 110071324269 (U.S. EPA ECHO) Agency record
Severity 1.5
Bdm 2022 New Wtp Improvements, Britton
NPDES wastewater discharge permit.
EPA FRS registry ID 110071661537 (U.S. EPA ECHO) Agency record
Severity 1.5
Pcn 05f4, Britton
NPDES wastewater discharge permit.
EPA FRS registry ID 110071709921 (U.S. EPA ECHO) Agency record
Severity 1.5
Marshall County Courthouse, Britton
NPDES wastewater discharge permit.
EPA FRS registry ID 110071905298 (U.S. EPA ECHO) Agency record
Severity 1.5
116th Street, Claremont
Rail grade crossing.
Record ID 067385F (Federal Railroad Administration)
Severity 1.2
413th Avenue, Amherst
Rail grade crossing.
Record ID 067386M (Federal Railroad Administration)
Severity 1.2
Private Road, Claremont
Rail grade crossing.
Record ID 067388B (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 Marshall 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 Marshall 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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