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Day County, South Dakota: environmental and disease records

Cancer mortality in Day County is 145.1 deaths per 100,000 people per year against a U.S. rate of 143.2. Federal databases place 132 regulated facilities, sites and hazards inside the county, led by Brownfield property (57), Rail grade crossing (48), NPDES wastewater discharge permit (19). 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: 45.3631, -97.6037.

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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 Day County compared with the United States
Cancer	Measure	County rate	U.S. rate	Times U.S.	95% interval	Years
Bladder	New cases	37.6	18.7	2.01xSignificant	22.8 to 62.1	2019-2023
All cancer	New cases	459.6	453.4	1.01x	393.1 to 535.6	2019-2023
All cancer	Deaths	145.1	143.2	1.01x	113.1 to 185.8	2020-2024
Lung & bronchus	New cases	49.2	51.8	0.95x	30.3 to 78.1	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 Day County
Measure	County	U.S. median	Difference	Unit
Premature death	6,775.7	9,842.6	-31%	years of life lost before age 75 per 100,000
Life expectancy	78.3	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	103.1	96.9	+6%	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.

Formaldehyde11.32 per million
Carbon Tetrachloride2.89 per million
Acetaldehyde0.83 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

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

Brownfield property57
Rail grade crossing48
NPDES wastewater discharge permit19
Gas station (mapped facility)2
Major air pollution source1
Air permit holder (minor source)1
Public airport1
Wind power plant1
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.

Dakota Fiberglass Inc., Webster
Toxic chemical release facility (TRI). Chemicals: Styrene. Reports carcinogens. 69,028 lbs released over 5 years.
TRI facility ID 57274DKTFB1720C (U.S. EPA Toxics Release Inventory)
Severity 8.2
Dakota Fiberglass Inc, Webster
TRI reporting facility.
EPA FRS registry ID 110002124120 (U.S. EPA ECHO) Agency record
Severity 5.9
Powdertech Corporation, Webster
NPDES wastewater discharge permit. Penalties $34,188.
EPA FRS registry ID 110033622792 (U.S. EPA ECHO) Agency record
Severity 4
Dakota Foundry Inc, Webster
Major air pollution source.
EPA FRS registry ID 110033141972 (U.S. EPA ECHO) Agency record
Severity 3.5
Blue Dog Lake Open Dump, Unincorporated Day County
Brownfield property.
EPA FRS registry ID 110038701893 (U.S. EPA Brownfields (ACRES)) Agency record
Severity 3
Campbell Slough Open Dump, Unincorporated Day County
Brownfield property.
EPA FRS registry ID 110038701900 (U.S. EPA Brownfields (ACRES)) Agency record
Severity 3
1218 East Lakeshore Drive, Waubay
Brownfield property.
EPA FRS registry ID 110071963874 (U.S. EPA Brownfields (ACRES)) Agency record
Severity 3
106 West Lakeshore Drive, Waubay
Brownfield property.
EPA FRS registry ID 110071963923 (U.S. EPA Brownfields (ACRES)) Agency record
Severity 3
12 East Lakeshore Drive, Waubay
Brownfield property.
EPA FRS registry ID 110071963924 (U.S. EPA Brownfields (ACRES)) Agency record
Severity 3
131 South Main Street, Waubay
Brownfield property.
EPA FRS registry ID 110071963925 (U.S. EPA Brownfields (ACRES)) Agency record
Severity 3
135 South Main Street, Waubay
Brownfield property.
EPA FRS registry ID 110071963926 (U.S. EPA Brownfields (ACRES)) Agency record
Severity 3
140 South Main Street, Waubay
Brownfield property.
EPA FRS registry ID 110071963927 (U.S. EPA Brownfields (ACRES)) Agency record
Severity 3
206 West Lakeshore Drive, Waubay
Brownfield property.
EPA FRS registry ID 110071963928 (U.S. EPA Brownfields (ACRES)) Agency record
Severity 3
218 West Lakeshore Drive, Waubay
Brownfield property.
EPA FRS registry ID 110071963929 (U.S. EPA Brownfields (ACRES)) Agency record
Severity 3
219 North 2nd Street, Waubay
Brownfield property.
EPA FRS registry ID 110071963930 (U.S. EPA Brownfields (ACRES)) Agency record
Severity 3
225 West 4th Avenue, Waubay
Brownfield property.
EPA FRS registry ID 110071963931 (U.S. EPA Brownfields (ACRES)) Agency record
Severity 3
316 North 3rd Street, Waubay
Brownfield property.
EPA FRS registry ID 110071963932 (U.S. EPA Brownfields (ACRES)) Agency record
Severity 3
359 Yellowstone Trail, Waubay
Brownfield property.
EPA FRS registry ID 110071963933 (U.S. EPA Brownfields (ACRES)) Agency record
Severity 3
70 West Yellowstone Trail, Waubay
Brownfield property.
EPA FRS registry ID 110071963934 (U.S. EPA Brownfields (ACRES)) Agency record
Severity 3
76 West Lakeshore Drive, Waubay
Brownfield property.
EPA FRS registry ID 110071963935 (U.S. EPA Brownfields (ACRES)) Agency record
Severity 3
954 East Lakeshore Drive, Waubay
Brownfield property.
EPA FRS registry ID 110071963936 (U.S. EPA Brownfields (ACRES)) Agency record
Severity 3
130 West Lakeshore Drive, Waubay
Brownfield property.
EPA FRS registry ID 110071963937 (U.S. EPA Brownfields (ACRES)) Agency record
Severity 3
130 South Main Street, Waubay
Brownfield property.
EPA FRS registry ID 110071963938 (U.S. EPA Brownfields (ACRES)) Agency record
Severity 3
139 South Main Street, Waubay
Brownfield property.
EPA FRS registry ID 110071963939 (U.S. EPA Brownfields (ACRES)) Agency record
Severity 3
203 North 2nd Street, Waubay
Brownfield property.
EPA FRS registry ID 110071963940 (U.S. EPA Brownfields (ACRES)) Agency record
Severity 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 Day 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 Day 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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