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Clark County, Missouri: environmental and disease records

Cancer mortality in Clark County is 153 deaths per 100,000 people per year against a U.S. rate of 143.2. Federal databases place 108 regulated facilities, sites and hazards inside the county, led by NPDES wastewater discharge permit (32), Industrial wastewater discharge (30), Rail grade crossing (24). 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: 40.4309, -91.7324.

How this county ranks in Missouri

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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 Clark County compared with the United States
Cancer	Measure	County rate	U.S. rate	Times U.S.	95% interval	Years
Lung & bronchus	Deaths	40.3	30.2	1.33x	25.2 to 63	2020-2024
All cancer	New cases	500	453.4	1.1x	434.5 to 573.3	2019-2023
All cancer	Deaths	153	143.2	1.07x	121.2 to 192	2020-2024
Lung & bronchus	New cases	47.7	51.8	0.92x	30.9 to 72.1	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 Clark County
Measure	County	U.S. median	Difference	Unit
Premature death	6,740.8	9,842.6	-32%	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	56	96.9	-42%	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.

Formaldehyde17.14 per million
Carbon Tetrachloride2.96 per million
Acetaldehyde1.61 per million
Benzene0.69 per million

EPA Air Quality Index

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

Regulated facilities, sites and hazards by type

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

NPDES wastewater discharge permit32
Industrial wastewater discharge30
Rail grade crossing24
Air permit holder (minor source)13
Gas station (mapped facility)4
Public airport1
Auto repair or body shop (mapped facility)1
Oil-fired power plant1
Toxic chemical release facility (TRI)1
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.

Nemo Rentals Mhp Wwtf, Kahoka
NPDES wastewater discharge permit.
EPA FRS registry ID 110009869990 (U.S. EPA ECHO) Agency record
Severity 4.3
Kahoka, Kahoka
Oil-fired power plant.
Record ID 2138 (U.S. Energy Information Administration)
Severity 4
Wayland Pws, Wayland
NPDES wastewater discharge permit.
EPA FRS registry ID 110009876839 (U.S. EPA ECHO) Agency record
Severity 3.5
Kahoka Wwtf, Kahoka
NPDES wastewater discharge permit.
EPA FRS registry ID 110009877106 (U.S. EPA ECHO) Agency record
Severity 3.5
Kahoka Quarry, Kahoka
NPDES wastewater discharge permit.
EPA FRS registry ID 110017996542 (U.S. EPA ECHO) Agency record
Severity 3.5
Ayerco #26 Alexandria Station Wwtp, Alexandria
NPDES wastewater discharge permit.
EPA FRS registry ID 110013809655 (U.S. EPA ECHO) Agency record
Severity 3.3
Kahoka Quarry, Kahoka
Air permit holder (minor source).
EPA FRS registry ID 110017996542 (U.S. EPA ECHO) Agency record
Severity 3
Kpf Steel Foundry, Kahoka
Toxic chemical release facility (TRI). Chemicals: Diisocyanates.
TRI facility ID 6344WKPFST89EAS (U.S. EPA Toxics Release Inventory)
Severity 3
Luray Wwtf, Luray
NPDES wastewater discharge permit.
EPA FRS registry ID 110024404768 (U.S. EPA ECHO) Agency record
Severity 2.8
Wyaconda Wwtf, Wyaconda
Industrial wastewater discharge. No Violation Identified.
NPDES permit MO0099007: (U.S. EPA NPDES)
Severity 2.3
Wayland Wwtf, Wayland
Industrial wastewater discharge. No Violation Identified.
NPDES permit MO0053457: (U.S. EPA NPDES)
Severity 2.3
Wyaconda Wwtf, Wyaconda
NPDES wastewater discharge permit.
EPA FRS registry ID 110009874010 (U.S. EPA ECHO) Agency record
Severity 2
Revere Wwtf, Revere
NPDES wastewater discharge permit.
EPA FRS registry ID 110024404759 (U.S. EPA ECHO) Agency record
Severity 2
Tnt General Contracting, Inc., Kahoka
NPDES wastewater discharge permit.
EPA FRS registry ID 110042805211 (U.S. EPA ECHO) Agency record
Severity 2
Kahoka Muni, Kahoka
Public airport. O.
Record ID 0H7 (FAA / U.S. DOT)
Severity 2
Wastewater Plant
Wastewater plant (mapped facility). Mapped facility presence only; no compliance or exposure measurements.
Record ID way/917960428 (OpenStreetMap contributors) Agency record
Severity 2
Consolidated Pwsd #1 Clark County, Wayland
NPDES wastewater discharge permit.
EPA FRS registry ID 110009012638 (U.S. EPA ECHO) Agency record
Severity 1.8
Trump Ridge Wwtp, Kahoka
NPDES wastewater discharge permit.
EPA FRS registry ID 110009713453 (U.S. EPA ECHO) Agency record
Severity 1.8
Trump Trucks, Inc., Kahoka
NPDES wastewater discharge permit.
EPA FRS registry ID 110011079607 (U.S. EPA ECHO) Agency record
Severity 1.8
Viking Aggregates - Wayland Sand, Alexandria
NPDES wastewater discharge permit.
EPA FRS registry ID 110011108942 (U.S. EPA ECHO) Agency record
Severity 1.8
Kahoka Fast Stop Express, Kahoka
NPDES wastewater discharge permit.
EPA FRS registry ID 110031276401 (U.S. EPA ECHO) Agency record
Severity 1.8
Mfa Oil Company Kahoka Bulk Plant, Kahoka
NPDES wastewater discharge permit.
EPA FRS registry ID 110032946285 (U.S. EPA ECHO) Agency record
Severity 1.8
Keokuk Prototype Foundry Company, Inc., Kahoka
NPDES wastewater discharge permit.
EPA FRS registry ID 110040756278 (U.S. EPA ECHO) Agency record
Severity 1.8
Wayland Quarry, Alexandria
NPDES wastewater discharge permit.
EPA FRS registry ID 110055250482 (U.S. EPA ECHO) Agency record
Severity 1.8
Mfa Agri Service Kahoka, Kahoka
NPDES wastewater discharge permit.
EPA FRS registry ID 110000707842 (U.S. EPA ECHO) Agency record
Severity 1.5

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 Clark County

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