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Johnson County, Iowa: environmental and disease records

Cancer mortality in Johnson County is 105 deaths per 100,000 people per year against a U.S. rate of 143.2. Federal databases place 570 regulated facilities, sites and hazards inside the county, led by Rail grade crossing (137), Brownfield property (88), Air permit holder (minor source) (75). 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: 41.643, -91.5998.

How this county ranks in Iowa

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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 Johnson County compared with the United States
CancerMeasureCounty rateU.S. rateTimes U.S.95% intervalYears
Melanoma of the skinNew cases37.423.81.57xSignificant33 to 42.32019-2023
LeukemiaNew cases1914.51.31xSignificant15.9 to 22.52019-2023
Non-Hodgkin lymphomaNew cases22.918.51.24xSignificant19.6 to 26.72019-2023
BladderNew cases2118.71.12x17.8 to 24.72019-2023
EsophagusDeaths4.13.71.11x2.8 to 5.82020-2024
All cancerNew cases494.8453.41.09xSignificant478.6 to 511.42019-2023
Kidney & renal pelvisNew cases19.517.91.09x16.4 to 232019-2023
Brain & nervous systemNew cases6.76.21.08x4.9 to 8.82019-2023
Childhood cancer (under 15)New cases17.316.41.05x10.8 to 26.22019-2023
EsophagusNew cases4.64.61x3.2 to 6.42019-2023
PancreasNew cases13.913.91x11.4 to 16.92019-2023
ThyroidNew cases12.7130.98x10.1 to 15.62019-2023
Brain & nervous systemDeaths4.14.40.93x2.8 to 5.82020-2024
Lung & bronchusNew cases45.651.80.88x40.8 to 50.82019-2023
StomachNew cases5.86.60.88x4.2 to 7.92019-2023
PancreasDeaths9.911.30.88x7.8 to 12.42020-2024
Liver & bile ductNew cases78.70.8x5.2 to 9.12019-2023
LeukemiaDeaths4.55.70.79x3.1 to 6.42020-2024
All cancerDeaths105143.20.73x97.8 to 112.62020-2024
Lung & bronchusDeaths20.430.20.68x17.3 to 23.92020-2024
Non-Hodgkin lymphomaDeaths2.74.80.56x1.6 to 4.22020-2024
Liver & bile ductDeaths3.66.60.55x2.4 to 5.12020-2024
BladderDeaths2.24.10.54x1.3 to 3.62020-2024

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 Johnson County
MeasureCountyU.S. medianDifferenceUnit
Premature death4,820.99,842.6-51%years of life lost before age 75 per 100,000
Life expectancy8275.3+9%years
Child mortality39.259.8-34%deaths under age 18 per 100,000
Infant mortality5.16.2-17%deaths under age 1 per 1,000 live births
Injury deaths49.396.9-49%deaths per 100,000
Drug overdose deaths10.128.6-65%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.

  • Formaldehyde16.29 per million
  • Carbon Tetrachloride2.97 per million
  • Acetaldehyde1.58 per million
  • Benzene1.05 per million

EPA Air Quality Index 2025

Monitored on 365 days: 256 good, 4 unhealthy for sensitive groups or worse. Median AQI 37, peak 159.

Regulated facilities, sites and hazards by type

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

  • Rail grade crossing137
  • Brownfield property88
  • Air permit holder (minor source)75
  • Gas station (mapped facility)65
  • NPDES wastewater discharge permit51
  • Industrial wastewater discharge48
  • Auto repair or body shop (mapped facility)41
  • Small hazardous waste generator17
  • Toxic chemical release facility (TRI)8
  • Major air pollution source6
  • TRI reporting facility6
  • Large hazardous waste generator5
  • Dry cleaner (mapped facility)4
  • Hazardous waste transporter3
  • Gas power plant3
  • Public airport2
  • Large greenhouse gas emitter2
  • Heliport2
  • Scrapyard (mapped facility)2
  • EPA air quality monitor1
  • Commercial airport1
  • Landfill (mapped facility)1
  • Oil-fired power 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.

  1. Loparex Llc, Iowa City

    Toxic chemical release facility (TRI). Chemicals: Toluene, Ethylbenzene, Xylene (mixed isomers). Reports carcinogens. 180,580 lbs released over 5 years.

    TRI facility ID 52240JMSRV2000I (U.S. EPA Toxics Release Inventory)

    Severity 8.5

  2. Integrated Dna Technologies, Coralville

    Toxic chemical release facility (TRI). Chemicals: Acetonitrile, Toluene, Dichloromethane, Pyridine and 2 more. Reports carcinogens. 147,356 lbs released over 5 years.

    TRI facility ID 5224WNTGRT171CM (U.S. EPA Toxics Release Inventory)

    Severity 8.5

  3. Loparex, Inc, Iowa City

    TRI reporting facility. Penalties $373,000.

    EPA FRS registry ID 110017406608 (U.S. EPA ECHO) Agency record

    Severity 7.8

  4. Iowa City Wastewater Treatment - South Plant, Iowa City

    NPDES wastewater discharge permit.

    EPA FRS registry ID 110000509209 (U.S. EPA ECHO) Agency record

    Severity 6

  5. Procter & Gamble Hair Care Llc, Iowa City

    Toxic chemical release facility (TRI). Chemicals: Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size), Certain glycol ethers, Zinc compounds, Selenium compounds and 3 more. 5,256 lbs released over 5 years.

    TRI facility ID 52240THPRC2200L (U.S. EPA Toxics Release Inventory)

    Severity 5.9

  6. Integrated Dna Technologies, Coralville

    TRI reporting facility.

    EPA FRS registry ID 110000789692 (U.S. EPA ECHO) Agency record

    Severity 5.8

  7. IOWA CITY, HOOVER SCH., Iowa City

    EPA air quality monitor.

    Record ID 191032001 (U.S. EPA AirData)

    Severity 5.6

  8. Timber Trails Estates Homeowner'S Association, Iowa City

    NPDES wastewater discharge permit. Penalties $500.

    EPA FRS registry ID 110010030279 (U.S. EPA ECHO) Agency record

    Severity 5.5

  9. Sunrise Village Mobile Home Pk-Plant #1, Iowa City

    NPDES wastewater discharge permit. Penalties $8,000.

    EPA FRS registry ID 110013218428 (U.S. EPA ECHO) Agency record

    Severity 5.5

  10. University Of Iowa Cooling Tower Blowdown, Iowa City

    Major air pollution source.

    EPA FRS registry ID 110013326356 (U.S. EPA ECHO) Agency record

    Severity 5.5

  11. Loparex, Inc, Iowa City

    Major air pollution source. Penalties $373,000.

    EPA FRS registry ID 110017406608 (U.S. EPA ECHO) Agency record

    Severity 5.3

  12. University Of Iowa Cooling Tower Blowdown, Iowa City

    NPDES wastewater discharge permit.

    EPA FRS registry ID 110013326356 (U.S. EPA ECHO) Agency record

    Severity 5

  13. Bae Systems Information & Electronic Systems Integration I, Coralville

    Toxic chemical release facility (TRI). Chemicals: Lead. Reports carcinogens. 3 lbs released over 5 years.

    TRI facility ID 5224WBSYST2855H (U.S. EPA Toxics Release Inventory)

    Severity 4.9

  14. Rockwell Collins Inc Coralville Operations, Coralville

    Toxic chemical release facility (TRI). Chemicals: Lead. Reports carcinogens. 3 lbs released over 5 years.

    TRI facility ID 52241RCKWL2855H (U.S. EPA Toxics Release Inventory)

    Severity 4.9

  15. Proctor & Gamble Hair Care Llc-Iowa City, Iowa City

    TRI reporting facility.

    EPA FRS registry ID 110000414800 (U.S. EPA ECHO) Agency record

    Severity 4.8

  16. Loparex, Inc, Iowa City

    Large hazardous waste generator. Penalties $373,000.

    EPA FRS registry ID 110017406608 (U.S. EPA ECHO) Agency record

    Severity 4.8

  17. Modern Manor Mobile Home Court, Iowa City

    NPDES wastewater discharge permit.

    EPA FRS registry ID 110009724637 (U.S. EPA ECHO) Agency record

    Severity 4.5

  18. Sleepy Hollow Campground & Rv Park, Oxford

    NPDES wastewater discharge permit.

    EPA FRS registry ID 110013101339 (U.S. EPA ECHO) Agency record

    Severity 4.5

  19. Iowa City Mhp Llc-Plant #1, Iowa City

    NPDES wastewater discharge permit.

    EPA FRS registry ID 110013103239 (U.S. EPA ECHO) Agency record

    Severity 4.3

  20. Buckeye Terminals, Llc - Cedar Rapids, North Liberty

    NPDES wastewater discharge permit.

    EPA FRS registry ID 110018868439 (U.S. EPA ECHO) Agency record

    Severity 4.3

  21. Farmers Electric Cooperative - Kalona, Kalona

    Oil-fired power plant.

    Record ID 62461 (U.S. Energy Information Administration)

    Severity 4

  22. Collins Aerospace, Coralville

    TRI reporting facility.

    EPA FRS registry ID 110000414828 (U.S. EPA ECHO) Agency record

    Severity 4

  23. Hubbard Feeds Inc, Iowa City

    TRI reporting facility.

    EPA FRS registry ID 110000772487 (U.S. EPA ECHO) Agency record

    Severity 4

  24. Oxford City Of Stp, Oxford

    NPDES wastewater discharge permit.

    EPA FRS registry ID 110009723692 (U.S. EPA ECHO) Agency record

    Severity 4

  25. Oral-B Laboratories Power Oral Care, Iowa City

    TRI reporting facility.

    EPA FRS registry ID 110070119959 (U.S. EPA ECHO) Agency record

    Severity 4

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 Johnson County

  • Iowa 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 Johnson County, and their findings.

  • Iowa vital statistics office

    Death certificate counts by cause of death and residence tract or ZIP code, and the years behind the mortality measures above.

  • Iowa health department, environmental epidemiology

    Health consultations or assessments by ATSDR or the state health department covering the county, and any exposure investigations.

  • Iowa 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.

  • Iowa 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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