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Sequoyah County, Oklahoma: environmental and disease records

Cancer mortality in Sequoyah County is 232.7 deaths per 100,000 people per year against a U.S. rate of 143.2, a statistically significant excess. The strongest disease signals are Lung & bronchus deaths at 2.3 times the U.S. rate and Kidney & renal pelvis deaths at 2.2 times the U.S. rate. Federal databases place 228 regulated facilities, sites and hazards inside the county, led by Rail grade crossing (81), Air permit holder (minor source) (54), Gas station (mapped facility) (31). EPA AirToxScreen estimates a lifetime cancer risk from outdoor air toxics of 30 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: 35.4649, -94.7525.

How this county ranks in Oklahoma

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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 Sequoyah County compared with the United States
Cancer	Measure	County rate	U.S. rate	Times U.S.	95% interval	Years
Lung & bronchus	Deaths	70.6	30.2	2.34xSignificant	61.1 to 81.4	2020-2024
Kidney & renal pelvis	Deaths	7.5	3.4	2.21xSignificant	4.6 to 11.6	2020-2024
All cancer	Deaths	232.7	143.2	1.63xSignificant	214.6 to 252	2020-2024
Liver & bile duct	Deaths	10.6	6.6	1.61xSignificant	7.2 to 15.3	2020-2024
Brain & nervous system	Deaths	6.9	4.4	1.57x	4 to 11.2	2020-2024
Lung & bronchus	New cases	78.6	51.8	1.52xSignificant	68.4 to 90	2019-2023
Liver & bile duct	New cases	12.2	8.7	1.4x	8.2 to 17.5	2019-2023
Non-Hodgkin lymphoma	Deaths	6.5	4.8	1.35x	3.8 to 10.5	2020-2024
Leukemia	Deaths	7.5	5.7	1.32x	4.4 to 12	2020-2024
Kidney & renal pelvis	New cases	23.2	17.9	1.3x	17.5 to 30.2	2019-2023
Thyroid	New cases	16.7	13	1.28x	11.5 to 23.3	2019-2023
Pancreas	Deaths	14.4	11.3	1.27x	10 to 20.1	2020-2024
All cancer	New cases	498.3	453.4	1.1xSignificant	470.6 to 527.3	2019-2023
Bladder	New cases	19.7	18.7	1.05x	14.7 to 26.1	2019-2023
Pancreas	New cases	13.3	13.9	0.96x	9.2 to 18.8	2019-2023
Brain & nervous system	New cases	5.9	6.2	0.95x	3.3 to 9.8	2019-2023
Melanoma of the skin	New cases	22.6	23.8	0.95x	17 to 29.6	2019-2023
Leukemia	New cases	13.7	14.5	0.94x	9.3 to 19.5	2019-2023
Non-Hodgkin lymphoma	New cases	17.3	18.5	0.94x	12.6 to 23.2	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 Sequoyah County
Measure	County	U.S. median	Difference	Unit
Premature death	14,516.6	9,842.6	+47%	years of life lost before age 75 per 100,000
Life expectancy	70.3	75.3	-7%	years
Child mortality	69.2	59.8	+16%	deaths under age 18 per 100,000
Infant mortality	9.3	6.2	+50%	deaths under age 1 per 1,000 live births
Injury deaths	104.2	96.9	+7%	deaths per 100,000
Drug overdose deaths	36.5	28.6	+27%	deaths per 100,000

Air toxics and air quality

EPA AirToxScreen 2020

Lifetime cancer risk from outdoor air toxics: 30 in a million. EPA treats 100 in a million as the upper end of acceptable risk and 1 in a million as the goal.

Formaldehyde22.06 per million
Carbon Tetrachloride2.91 per million
Acetaldehyde2.13 per million
Naphthalene0.92 per million

EPA Air Quality Index 2025

Monitored on 359 days: 258 good, 2 unhealthy for sensitive groups or worse. Median AQI 42, peak 138.

Regulated facilities, sites and hazards by type

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

Rail grade crossing81
Air permit holder (minor source)54
Gas station (mapped facility)31
NPDES wastewater discharge permit16
Brownfield property13
Auto repair or body shop (mapped facility)7
Scrapyard (mapped facility)6
Toxic chemical release facility (TRI)4
TRI reporting facility3
Major air pollution source2
Public airport2
EPA air quality monitor1
Airfield1
Commercial airport1
Dry cleaner (mapped facility)1
Small hazardous waste generator1
Heliport1
Landfill (mapped facility)1
Hydroelectric plant1
Wastewater plant (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.

, Roland
EPA air quality monitor.
Record ID 401359021 (U.S. EPA AirData)
Severity 5.6
Ok Foods - Muldrow, Muldrow
Toxic chemical release facility (TRI). Chemicals: Peracetic acid, Nitrate compounds (water dissociable; reportable only when in aqueous solution). 2,375 lbs released over 5 years.
TRI facility ID 7494WKFDSN1NWIL (U.S. EPA Toxics Release Inventory)
Severity 5.6
Ok Foods - Muldrow, Muldrow
TRI reporting facility.
EPA FRS registry ID 110000544894 (U.S. EPA ECHO) Agency record
Severity 5.6
Town Of Vian / Vian Pwa, Vian
NPDES wastewater discharge permit. Penalties $161,250.
EPA FRS registry ID 110011009425 (U.S. EPA ECHO) Agency record
Severity 5.5
U.S. Lime Co St Clair, Marble City
Toxic chemical release facility (TRI). Chemicals: Lead compounds. 454 lbs released over 5 years.
TRI facility ID 74945GLBLSHWY17 (U.S. EPA Toxics Release Inventory)
Severity 5
Us Lime Co St Clair, Marble City
TRI reporting facility.
EPA FRS registry ID 110015657877 (U.S. EPA ECHO) Agency record
Severity 4.9
Sheng Long Power Train, Sallisaw
Toxic chemical release facility (TRI). Chemicals: Nickel, Aluminum (fume or dust), Lead, Chromium and 2 more. Reports carcinogens.
TRI facility ID 74955CLTTM1300S (U.S. EPA Toxics Release Inventory)
Severity 4.5
Aviagen Feed Processing Unit, Sallisaw
Toxic chemical release facility (TRI). Chemicals: Formaldehyde. Reports carcinogens.
TRI facility ID 7495WVGNFD3EDRA (U.S. EPA Toxics Release Inventory)
Severity 4.5
Aviagen Feed Processing Unit, Sallisaw
TRI reporting facility.
EPA FRS registry ID 110070234700 (U.S. EPA ECHO) Agency record
Severity 4
City Of Sallisaw, Sallisaw
NPDES wastewater discharge permit.
EPA FRS registry ID 110011008587 (U.S. EPA ECHO) Agency record
Severity 3.8
Cellofoam Na Inc/Sallisaw Plt, Sallisaw
Major air pollution source.
EPA FRS registry ID 110001646498 (U.S. EPA ECHO) Agency record
Severity 3.5
Us Lime Co St Clair, Marble City
Major air pollution source.
EPA FRS registry ID 110015657877 (U.S. EPA ECHO) Agency record
Severity 3.5
Sallisaw Industrial Park, Sallisaw
Brownfield property.
EPA FRS registry ID 110038755790 (U.S. EPA Brownfields (ACRES)) Agency record
Severity 3
Sequoyah Landfill/Cherokee Pow-Wow Grounds, Roland
Brownfield property.
EPA FRS registry ID 110039546630 (U.S. EPA Brownfields (ACRES)) Agency record
Severity 3
West Siloam Springs, Roland
Brownfield property.
EPA FRS registry ID 110039546667 (U.S. EPA Brownfields (ACRES)) Agency record
Severity 3
Catoosa Truck Stop, Roland
Brownfield property.
EPA FRS registry ID 110039546676 (U.S. EPA Brownfields (ACRES)) Agency record
Severity 3
Hog Farm, Roland
Brownfield property.
EPA FRS registry ID 110039546694 (U.S. EPA Brownfields (ACRES)) Agency record
Severity 3
Carlile School, Roland
Brownfield property.
EPA FRS registry ID 110039546710 (U.S. EPA Brownfields (ACRES)) Agency record
Severity 3
Abandoned Lime Plant, Sallisaw
Brownfield property.
EPA FRS registry ID 110045012945 (U.S. EPA Brownfields (ACRES)) Agency record
Severity 3
Marble City Property, Marble City
Brownfield property.
EPA FRS registry ID 110071956463 (U.S. EPA Brownfields (ACRES)) Agency record
Severity 3
Marble City Project, Marble City
Brownfield property.
EPA FRS registry ID 110071967581 (U.S. EPA Brownfields (ACRES)) Agency record
Severity 3
Vian Peace Center, Vian
Brownfield property.
EPA FRS registry ID 110071979151 (U.S. EPA Brownfields (ACRES)) Agency record
Severity 3
Adamson Property, Muldrow
Brownfield property.
EPA FRS registry ID 110071979464 (U.S. EPA Brownfields (ACRES)) Agency record
Severity 3
Marble City Farmers & Art Market, Marble City
Brownfield property.
EPA FRS registry ID 110072135868 (U.S. EPA Brownfields (ACRES)) Agency record
Severity 3
Marble City Free Holiness Church, Marble City
Brownfield property.
EPA FRS registry ID 110072219137 (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 Sequoyah County

Oklahoma 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 Sequoyah County, and their findings.
Oklahoma vital statistics office
Death certificate counts by cause of death and residence tract or ZIP code, and the years behind the mortality measures above.
Oklahoma health department, environmental epidemiology
Health consultations or assessments by ATSDR or the state health department covering the county, and any exposure investigations.
Oklahoma 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.
Oklahoma 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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