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Dunn County, North Dakota: environmental and disease records

Cancer mortality in Dunn County is 131 deaths per 100,000 people per year against a U.S. rate of 143.2. Federal databases place 277 regulated facilities, sites and hazards inside the county, led by Air permit holder (minor source) (194), NPDES wastewater discharge permit (55), Major air pollution source (8). 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: 47.4401, -102.6524.

How this county ranks in North 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 Dunn County compared with the United States
Cancer	Measure	County rate	U.S. rate	Times U.S.	95% interval	Years
Lung & bronchus	New cases	78.1	51.8	1.51x	43.7 to 128.6	2019-2023
All cancer	Deaths	131	143.2	0.91x	88.6 to 187.3	2020-2024
All cancer	New cases	370.6	453.4	0.82x	294 to 461.5	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 Dunn County
Measure	County	U.S. median	Difference	Unit
Premature death	10,631.3	9,842.6	+8%	years of life lost before age 75 per 100,000
Life expectancy	77.2	75.3	+3%	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	70.5	96.9	-27%	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.

Formaldehyde17.54 per million
Carbon Tetrachloride2.85 per million
Benzene1.45 per million
Acetaldehyde0.69 per million

EPA Air Quality Index 2025

Monitored on 365 days: 291 good, 9 unhealthy for sensitive groups or worse. Median AQI 39, peak 217.

Regulated facilities, sites and hazards by type

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

Air permit holder (minor source)194
NPDES wastewater discharge permit55
Major air pollution source8
Public airport8
Gas station (mapped facility)3
Large greenhouse gas emitter2
Hazardous waste transporter2
TRI reporting facility2
EPA air quality monitor1
Large hazardous waste generator1
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.

Bear Creek Gas Plant, Killdeer
Toxic chemical release facility (TRI). Chemicals: n-Hexane, Toluene, Benzene, Methanol. Reports carcinogens. 19,435 lbs released over 5 years.
TRI facility ID 5864WBRCRK1572N (U.S. EPA Toxics Release Inventory)
Severity 7.8
Marathon Petroleum Corporation, Dickinson
TRI reporting facility.
EPA FRS registry ID 110059678353 (U.S. EPA ECHO) Agency record
Severity 6.9
Bear Creek Gas Plant, Killdeer
TRI reporting facility.
EPA FRS registry ID 110071396233 (U.S. EPA ECHO) Agency record
Severity 5.8
Lake Ilo, Dunn Center
EPA air quality monitor.
Record ID 380250004 (U.S. EPA AirData)
Severity 5.3
Marathon Petroleum Corporation, Dickinson
Major air pollution source.
EPA FRS registry ID 110059678353 (U.S. EPA ECHO) Agency record
Severity 4.5
Arrow Pipeline Station #3, North Dakota
Major air pollution source. Penalties $450,000.
EPA FRS registry ID 110062702918 (U.S. EPA ECHO) Agency record
Severity 4.5
Mandaree Wastewater Treatment Lagoons, Mandaree
NPDES wastewater discharge permit.
EPA FRS registry ID 110037514026 (U.S. EPA ECHO) Agency record
Severity 4.3
Marathon Petroleum Corporation, Dickinson
Large hazardous waste generator.
EPA FRS registry ID 110059678353 (U.S. EPA ECHO) Agency record
Severity 4
Marathon Petroleum Corporation, Dickinson
NPDES wastewater discharge permit.
EPA FRS registry ID 110059678353 (U.S. EPA ECHO) Agency record
Severity 4
Northern Border Pipeline Co., Unk
Major air pollution source.
EPA FRS registry ID 110010350459 (U.S. EPA ECHO) Agency record
Severity 3.5
Marathon Petroleum Corporation, Dickinson
Large greenhouse gas emitter.
EPA FRS registry ID 110059678353 (U.S. EPA ECHO) Agency record
Severity 3.5
Arrow Pipeline Station #4, North Dakota
Major air pollution source.
EPA FRS registry ID 110062719321 (U.S. EPA ECHO) Agency record
Severity 3.5
Robert'S Trust Compressor Station, Dunn County
Major air pollution source.
EPA FRS registry ID 110067013234 (U.S. EPA ECHO) Agency record
Severity 3.5
Arrow Pipeline Station #6, Mandaree
Major air pollution source.
EPA FRS registry ID 110067429456 (U.S. EPA ECHO) Agency record
Severity 3.5
Johnson Compressor Station, Mandaree
Major air pollution source.
EPA FRS registry ID 110070156161 (U.S. EPA ECHO) Agency record
Severity 3.5
Buffalo Compressor Station, Mandaree Segment
Major air pollution source.
EPA FRS registry ID 110070874124 (U.S. EPA ECHO) Agency record
Severity 3.5
Dodge City Of, Dodge
NPDES wastewater discharge permit.
EPA FRS registry ID 110011045056 (U.S. EPA ECHO) Agency record
Severity 2.5
Cs-5 Recovered Energy Facility, Manning
Large greenhouse gas emitter.
EPA FRS registry ID 110035986519 (U.S. EPA ECHO) Agency record
Severity 2.5
Bg Park Meadows-Killdeer, Killdeer
NPDES wastewater discharge permit.
EPA FRS registry ID 110058241905 (U.S. EPA ECHO) Agency record
Severity 2.5
Crestwood Two Shields Butte 9-8-7 Produced Water Spill, Mandaree
NPDES wastewater discharge permit. Penalties $106,500.
EPA FRS registry ID 110070626682 (U.S. EPA ECHO) Agency record
Severity 2.5
Killdeer City Of, Killdeer
NPDES wastewater discharge permit.
EPA FRS registry ID 110011045582 (U.S. EPA ECHO) Agency record
Severity 2.3
Ccuprairierose1btfh Meriwether1ambh-Ulw Prairierose1ambh-Ulw, Oakdale
Air permit holder (minor source). Penalties $170,000.
EPA FRS registry ID 110071642699 (U.S. EPA ECHO) Agency record
Severity 2
Dunn County Weydahl Fld, Killdeer
Public airport. O.
Record ID 9Y1 (FAA / U.S. DOT)
Severity 2
Dunn Center City Of, Dunn Center
NPDES wastewater discharge permit.
EPA FRS registry ID 110043452689 (U.S. EPA ECHO) Agency record
Severity 1.8
Civeo Regional Wwtp, Killdeer
NPDES wastewater discharge permit.
EPA FRS registry ID 110056210201 (U.S. EPA ECHO) Agency record
Severity 1.8

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 Dunn County

North 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 Dunn County, and their findings.
North 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.
North Dakota health department, environmental epidemiology
Health consultations or assessments by ATSDR or the state health department covering the county, and any exposure investigations.
North 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.
North 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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