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Grant County, Oklahoma: environmental and disease records

Cancer mortality in Grant County is 227.8 deaths per 100,000 people per year against a U.S. rate of 143.2, a statistically significant excess. Federal databases place 351 regulated facilities, sites and hazards inside the county, led by Air permit holder (minor source) (281), Rail grade crossing (47), NPDES wastewater discharge permit (7). 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: 36.7823, -97.7863.

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 Grant County compared with the United States
Cancer	Measure	County rate	U.S. rate	Times U.S.	95% interval	Years
All cancer	Deaths	227.8	143.2	1.59xSignificant	175.3 to 292.7	2020-2024
All cancer	New cases	482.8	453.4	1.06x	399.4 to 579.4	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 Grant County
Measure	County	U.S. median	Difference	Unit
Premature death	10,865.6	9,842.6	+10%	years of life lost before age 75 per 100,000
Life expectancy	73.5	75.3	-2%	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	126.8	96.9	+31%	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: 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.

Formaldehyde18.3 per million
Carbon Tetrachloride2.87 per million
Acetaldehyde1.43 per million
Benzene0.73 per million

EPA Air Quality Index 2025

Monitored on 102 days: 84 good, 1 unhealthy for sensitive groups or worse. Median AQI 31, peak 105.

Regulated facilities, sites and hazards by type

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

Air permit holder (minor source)281
Rail grade crossing47
NPDES wastewater discharge permit7
Public airport6
Major air pollution source4
Gas station (mapped facility)2
Wind power plant2
EPA air quality monitor1
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.

Oneok Hydrocarbon L.P. - Medford Fractionator, Medford
Toxic chemical release facility (TRI). Chemicals: n-Hexane, Cyclohexane, Benzene. Reports carcinogens. 108,483 lbs released over 5 years.
TRI facility ID 7375WNKHYD21HIG (U.S. EPA Toxics Release Inventory)
Severity 8.4
Medford Fractionator, Medford
Major air pollution source.
EPA FRS registry ID 110000711533 (U.S. EPA ECHO) Agency record
Severity 4.5
Medford Fractionator, Medford
NPDES wastewater discharge permit.
EPA FRS registry ID 110000711533 (U.S. EPA ECHO) Agency record
Severity 4
Southern Star Ctl G/Wakita Sta, Wakita
Major air pollution source.
EPA FRS registry ID 110007164709 (U.S. EPA ECHO) Agency record
Severity 3.8
Southern Star Ctl Gas Pipeline Inc/Webb Sta, Deer Creek
Major air pollution source.
EPA FRS registry ID 110007165753 (U.S. EPA ECHO) Agency record
Severity 3.5
Pond Creek, Pond Creek
NPDES wastewater discharge permit.
EPA FRS registry ID 110011008550 (U.S. EPA ECHO) Agency record
Severity 3.5
Oneok Ngl Pipeline /Medford Ngl Sta, Medford
Major air pollution source.
EPA FRS registry ID 110041996882 (U.S. EPA ECHO) Agency record
Severity 3.5
Pond Creek Muni, Pond Creek
Public airport. O.
Record ID 2K1 (FAA / U.S. DOT)
Severity 2
Medford Muni, Medford
Public airport. O.
Record ID O53 (FAA / U.S. DOT)
Severity 2
Burnet Farms, Manchester
NPDES wastewater discharge permit.
EPA FRS registry ID 110011014160 (U.S. EPA ECHO) Agency record
Severity 1.5
Muegge Feedlot, Lamont
NPDES wastewater discharge permit.
EPA FRS registry ID 110055369881 (U.S. EPA ECHO) Agency record
Severity 1.5
Tonkawa Casino Southwest Road And Service Drive Project, Tonkawa74653
NPDES wastewater discharge permit.
EPA FRS registry ID 110070133942 (U.S. EPA ECHO) Agency record
Severity 1.5
New Well No. 54-H At Webb Well Storage Field, Nardin
NPDES wastewater discharge permit.
EPA FRS registry ID 110071657746 (U.S. EPA ECHO) Agency record
Severity 1.5
Lamont La-1 Lp Replacement, Lamont
NPDES wastewater discharge permit.
EPA FRS registry ID 110072072994 (U.S. EPA ECHO) Agency record
Severity 1.5
Private, Renfrow
Rail grade crossing.
Record ID 414379K (Federal Railroad Administration)
Severity 1.3
Private, Medford
Rail grade crossing.
Record ID 414380E (Federal Railroad Administration)
Severity 1.3
Osage Rd, Renfrow
Rail grade crossing.
Record ID 595134S (Federal Railroad Administration)
Severity 1.3
Noble Rd, Renfrow
Rail grade crossing.
Record ID 595135Y (Federal Railroad Administration)
Severity 1.3
County Rd 1020, Renfrow
Rail grade crossing.
Record ID 595136F (Federal Railroad Administration)
Severity 1.3
Mcclain Rd, Renfrow
Rail grade crossing.
Record ID 595137M (Federal Railroad Administration)
Severity 1.3
Major Rd, Renfrow
Rail grade crossing.
Record ID 595138U (Federal Railroad Administration)
Severity 1.3
Logan Rd, Renfrow
Rail grade crossing.
Record ID 595139B (Federal Railroad Administration)
Severity 1.3
County Rd 1000, Renfrow
Rail grade crossing.
Record ID 595140V (Federal Railroad Administration)
Severity 1.3
Laitmer Rd, Renfrow
Rail grade crossing.
Record ID 595143R (Federal Railroad Administration)
Severity 1.3
Kiowa Rd, Renfrow
Rail grade crossing.
Record ID 595144X (Federal Railroad Administration)
Severity 1.3

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 Grant 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 Grant 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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