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Clark County, Ohio: environmental and disease records

Cancer mortality in Clark County is 165.8 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 1.4 times the U.S. rate and Leukemia deaths at 1.4 times the U.S. rate. Federal databases place 418 regulated facilities, sites and hazards inside the county, led by Rail grade crossing (131), Air permit holder (minor source) (115), Gas station (mapped facility) (50). 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: 39.9028, -83.7982.

How this county ranks in Ohio

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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	New cases	78.8	51.8	1.52xSignificant	73.3 to 84.6	2019-2023
Lung & bronchus	Deaths	43.5	30.2	1.44xSignificant	39.4 to 47.9	2020-2024
Leukemia	Deaths	7.8	5.7	1.37xSignificant	6.1 to 9.8	2020-2024
Esophagus	New cases	6.2	4.6	1.35xSignificant	4.7 to 8.1	2019-2023
Childhood cancer (under 15)	New cases	21.6	16.4	1.32x	14.3 to 31.5	2019-2023
Kidney & renal pelvis	New cases	22.4	17.9	1.25xSignificant	19.2 to 26	2019-2023
Esophagus	Deaths	4.6	3.7	1.24x	3.3 to 6.3	2020-2024
Bladder	New cases	23	18.7	1.23xSignificant	20 to 26.4	2019-2023
All cancer	Deaths	165.8	143.2	1.16xSignificant	157.7 to 174.3	2020-2024
Melanoma of the skin	Deaths	2.3	2	1.15x	1.4 to 3.6	2020-2024
Kidney & renal pelvis	Deaths	3.9	3.4	1.15x	2.7 to 5.5	2020-2024
Melanoma of the skin	New cases	26.7	23.8	1.12x	23.3 to 30.5	2019-2023
All cancer	New cases	505.7	453.4	1.12xSignificant	490.8 to 521	2019-2023
Liver & bile duct	Deaths	7.3	6.6	1.11x	5.7 to 9.2	2020-2024
Thyroid	New cases	13.9	13	1.07x	11.2 to 17.1	2019-2023
Non-Hodgkin lymphoma	Deaths	5.1	4.8	1.06x	3.8 to 6.9	2020-2024
Non-Hodgkin lymphoma	New cases	18.9	18.5	1.02x	16.1 to 22.1	2019-2023
Leukemia	New cases	14.8	14.5	1.02x	12.3 to 17.7	2019-2023
Bladder	Deaths	4	4.1	0.98x	2.9 to 5.6	2020-2024
Liver & bile duct	New cases	8.1	8.7	0.93x	6.4 to 10.2	2019-2023
Pancreas	New cases	12.9	13.9	0.93x	10.7 to 15.4	2019-2023
Pancreas	Deaths	10.3	11.3	0.91x	8.4 to 12.6	2020-2024
Stomach	New cases	6	6.6	0.91x	4.4 to 7.9	2019-2023
Brain & nervous system	Deaths	3.4	4.4	0.77x	2.3 to 4.9	2020-2024
Brain & nervous system	New cases	4.3	6.2	0.69x	3 to 6	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	12,878	9,842.6	+31%	years of life lost before age 75 per 100,000
Life expectancy	72.3	75.3	-4%	years
Child mortality	79	59.8	+32%	deaths under age 18 per 100,000
Infant mortality	7.8	6.2	+26%	deaths under age 1 per 1,000 live births
Injury deaths	132.4	96.9	+37%	deaths per 100,000
Drug overdose deaths	53.7	28.6	+88%	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.

Formaldehyde17.34 per million
Carbon Tetrachloride2.92 per million
Acetaldehyde1.75 per million
Benzene1.22 per million

EPA Air Quality Index 2025

Monitored on 363 days: 223 good, 2 unhealthy for sensitive groups or worse. Median AQI 45, peak 126.

Regulated facilities, sites and hazards by type

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

Rail grade crossing131
Air permit holder (minor source)115
Gas station (mapped facility)50
NPDES wastewater discharge permit34
Toxic chemical release facility (TRI)16
Brownfield property14
TRI reporting facility14
Small hazardous waste generator12
Public airport6
Auto repair or body shop (mapped facility)5
Large hazardous waste generator5
EPA air quality monitor3
Hazardous waste transporter2
Heliport2
Superfund (NPL) site2
Wastewater plant (mapped facility)2
Major air pollution source1
Commercial airport1
Dry cleaner (mapped facility)1
Landfill (mapped facility)1
Solar power plant1

Highest-severity records

The 25 records with the highest Envyrofax severity in the county, with the agency identifier to cite in a records request.

New Carlisle Landfill, New Carlisle
Superfund (NPL) site. Hazard Ranking System score 46.4. NPL Site.
EPA site ID OHN000509238 (U.S. EPA Superfund (SEMS/NPL)) Agency record
Severity 10
Donnelsville Contaminated Aquifer, Donnelsville
Superfund (NPL) site. Hazard Ranking System score 35.1. NPL Site.
EPA site ID OHN000510459 (U.S. EPA Superfund (SEMS/NPL)) Agency record
Severity 10
International Motors Llc., Springfield
Toxic chemical release facility (TRI). Chemicals: Certain glycol ethers, n-Butyl alcohol, 1,2,4-Trimethylbenzene, N-Methyl-2-pyrrolidone and 4 more. Reports carcinogens. 44,855 lbs released over 5 years.
TRI facility ID 45502NVSTR6125U (U.S. EPA Toxics Release Inventory)
Severity 8.1
Parker Trutec, Springfield
TRI reporting facility. Penalties $97,600.
EPA FRS registry ID 110000394966 (U.S. EPA ECHO) Agency record
Severity 7.6
Navistar, Inc., Springfield
TRI reporting facility.
EPA FRS registry ID 110000394957 (U.S. EPA ECHO) Agency record
Severity 7
Os Kelly Co, Springfield
Toxic chemical release facility (TRI). Chemicals: Naphthalene, Phenol, Lead, Xylene (mixed isomers) and 3 more. Reports carcinogens. 1,158 lbs released over 5 years.
TRI facility ID 45503SKLLY318EA (U.S. EPA Toxics Release Inventory)
Severity 6.9
The Champion Co, Springfield
Toxic chemical release facility (TRI). Chemicals: Methanol, Formaldehyde, Phenol. Reports carcinogens. 708 lbs released over 5 years.
TRI facility ID 45505THCHM400HA (U.S. EPA Toxics Release Inventory)
Severity 6.7
Parker Trutec, Springfield
Toxic chemical release facility (TRI). Chemicals: Cyanide compounds, Ammonia. 23,358 lbs released over 5 years.
TRI facility ID 45502TRTCN4700G (U.S. EPA Toxics Release Inventory)
Severity 6.4
City Of Springfield Wwtp, Springfield
NPDES wastewater discharge permit.
EPA FRS registry ID 110000761364 (U.S. EPA ECHO) Agency record
Severity 6
Silfex Inc, Springfield
Toxic chemical release facility (TRI). Chemicals: Nitric acid, Hydrogen fluoride, Nitrate compounds (water dissociable; reportable only when in aqueous solution). 7,669 lbs released over 5 years.
TRI facility ID 4550WSLFXN1TITU (U.S. EPA Toxics Release Inventory)
Severity 6
Springfield Fire St1, Springfield
EPA air quality monitor.
Record ID 390230005 (U.S. EPA AirData)
Severity 5.8
Superior Trim - Springfield Div, Springfield
Toxic chemical release facility (TRI). Chemicals: Diisocyanates. 2,766 lbs released over 5 years.
TRI facility ID 45502FNDLY5225P (U.S. EPA Toxics Release Inventory)
Severity 5.6
Silfex Inc, Springfield
TRI reporting facility.
EPA FRS registry ID 110070595447 (U.S. EPA ECHO) Agency record
Severity 5.6
Teikuro Corp, Springfield
Toxic chemical release facility (TRI). Chemicals: Chromium and Chromium Compounds(except for chromite ore mined in the Transvaal Region), Chromium compounds (except for chromite ore mined in the Transvaal Region), Lead. Reports carcinogens. 22 lbs released over 5 years.
TRI facility ID 45502TKRCR4500G (U.S. EPA Toxics Release Inventory)
Severity 5.5
O.S. Kelly Company (0812100276), Springfield
TRI reporting facility.
EPA FRS registry ID 110000394975 (U.S. EPA ECHO) Agency record
Severity 5.1
Champion Co, Springfield
TRI reporting facility.
EPA FRS registry ID 110000395055 (U.S. EPA ECHO) Agency record
Severity 5
Parker Trutec, Springfield
Large hazardous waste generator. Penalties $97,600.
EPA FRS registry ID 110000394966 (U.S. EPA ECHO) Agency record
Severity 5
Dole Fresh Vegetables, Inc., Springfield
TRI reporting facility. Penalties $33,105.
EPA FRS registry ID 110000556540 (U.S. EPA ECHO) Agency record
Severity 5
Yamada Na Inc, South Charleston
Toxic chemical release facility (TRI). Chemicals: Zinc (fume or dust). 260 lbs released over 5 years.
TRI facility ID 45368YMDNN9CLUM (U.S. EPA Toxics Release Inventory)
Severity 4.9
Blackhorse Energy Llc - Springfield Bulk Plant, Springfield
NPDES wastewater discharge permit.
EPA FRS registry ID 110000906235 (U.S. EPA ECHO) Agency record
Severity 4.5
Edgewood Mobile Home Park, Springfield
NPDES wastewater discharge permit.
EPA FRS registry ID 110006346668 (U.S. EPA ECHO) Agency record
Severity 4.5
Brookside Village Mhp Pws-Brookside Village Mhp, S Vienna
NPDES wastewater discharge permit.
EPA FRS registry ID 110006356317 (U.S. EPA ECHO) Agency record
Severity 4.5
City Of New Carlisle Wwtp, New Carlisle
NPDES wastewater discharge permit.
EPA FRS registry ID 110012300447 (U.S. EPA ECHO) Agency record
Severity 4.5
Ipl Dayton, Urbana
Toxic chemical release facility (TRI). Chemicals: Lead. Reports carcinogens.
TRI facility ID 4307WPLDYT1765W (U.S. EPA Toxics Release Inventory)
Severity 4.5
Pfi Precision New Carlisle Ohio, New Carlisle
Toxic chemical release facility (TRI). Chemicals: Lead. Reports carcinogens.
TRI facility ID 4534WPFPRC211ND (U.S. EPA Toxics Release Inventory)
Severity 4.5

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

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