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Arapahoe County, Colorado: environmental and disease records

Cancer mortality in Arapahoe County is 124 deaths per 100,000 people per year against a U.S. rate of 143.2. Federal databases place 2,413 regulated facilities, sites and hazards inside the county, led by NPDES wastewater discharge permit (730), Air permit holder (minor source) (614), Industrial wastewater discharge (491). 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: 39.6522, -104.283.

How this county ranks in Colorado

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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 Arapahoe County compared with the United States
CancerMeasureCounty rateU.S. rateTimes U.S.95% intervalYears
Childhood cancer (under 15)Deaths3.11.91.63x1.9 to 4.92020-2024
ThyroidDeaths0.60.51.2x0.4 to 0.92020-2024
Brain & nervous systemDeaths4.74.41.07x4 to 5.52020-2024
Melanoma of the skinDeaths2.121.05x1.6 to 2.62020-2024
Kidney & renal pelvisDeaths3.53.41.03x2.9 to 4.12020-2024
ThyroidNew cases13.3131.02x12.1 to 14.62019-2023
LeukemiaDeaths5.85.71.02x5 to 6.72020-2024
Melanoma of the skinNew cases22.423.80.94x20.8 to 242019-2023
Childhood cancer (under 15)New cases15.316.40.93x12.4 to 18.82019-2023
LeukemiaNew cases13.314.50.92x12.1 to 14.62019-2023
Non-Hodgkin lymphomaDeaths4.44.80.92x3.7 to 5.12020-2024
Brain & nervous systemNew cases5.66.20.9x4.9 to 6.52019-2023
BladderDeaths3.74.10.9x3.1 to 4.52020-2024
Kidney & renal pelvisNew cases1617.90.89x14.7 to 17.42019-2023
StomachDeaths2.42.70.89x1.9 to 32020-2024
All cancerNew cases402.3453.40.89x395.6 to 409.12019-2023
BladderNew cases16.518.70.88x15.2 to 182019-2023
PancreasNew cases12.213.90.88x11 to 13.42019-2023
PancreasDeaths9.911.30.88x8.9 to 112020-2024
Non-Hodgkin lymphomaNew cases16.218.50.88x14.9 to 17.62019-2023
All cancerDeaths124143.20.87x120.2 to 127.82020-2024
Liver & bile ductNew cases7.28.70.83x6.3 to 8.12019-2023
StomachNew cases5.46.60.82x4.6 to 6.22019-2023
Liver & bile ductDeaths5.26.60.79x4.5 to 62020-2024
EsophagusNew cases3.64.60.78x3 to 4.32019-2023
EsophagusDeaths2.83.70.76x2.3 to 3.42020-2024
Lung & bronchusNew cases37.451.80.72x35.4 to 39.52019-2023
Lung & bronchusDeaths19.430.20.64x17.9 to 20.92020-2024

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 Arapahoe County
MeasureCountyU.S. medianDifferenceUnit
Premature death6,895.49,842.6-30%years of life lost before age 75 per 100,000
Life expectancy79.175.3+5%years
Child mortality54.459.8-9%deaths under age 18 per 100,000
Infant mortality5.16.2-18%deaths under age 1 per 1,000 live births
Injury deaths8396.9-14%deaths per 100,000
Drug overdose deaths24.828.6-13%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.

  • Formaldehyde16.57 per million
  • Naphthalene4.05 per million
  • Benzene2.56 per million
  • Carbon Tetrachloride2.48 per million

EPA Air Quality Index 2025

Monitored on 365 days: 212 good, 2 unhealthy for sensitive groups or worse. Median AQI 48, peak 101.

Regulated facilities, sites and hazards by type

2,413 active records inside the county from EPA ECHO, TRI, Superfund, Brownfields, NPDES, EIA, FAA, FRA and corrections data.

  • NPDES wastewater discharge permit730
  • Air permit holder (minor source)614
  • Industrial wastewater discharge491
  • Auto repair or body shop (mapped facility)194
  • Gas station (mapped facility)176
  • Small hazardous waste generator50
  • Rail grade crossing37
  • Brownfield property30
  • Dry cleaner (mapped facility)17
  • Major air pollution source9
  • Public airport7
  • Heliport7
  • Solar power plant7
  • Toxic chemical release facility (TRI)7
  • Hazardous waste transporter6
  • Scrapyard (mapped facility)6
  • TRI reporting facility6
  • Large hazardous waste generator5
  • EPA air quality monitor3
  • Wastewater plant (mapped facility)3
  • Commercial airport2
  • Crematorium (mapped facility)2
  • Large greenhouse gas emitter1
  • Landfill (mapped facility)1
  • Biomass power plant1
  • Superfund (NPL) site1

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. Clean Harbors Deer Trail Llc, Deer Trail

    TRI reporting facility. Penalties $39,360.

    EPA FRS registry ID 110060947329 (U.S. EPA ECHO) Agency record

    Severity 10

  2. Lowry Landfill, Arapahoe County

    Superfund (NPL) site. Hazard Ranking System score 48.4. NPL Site.

    EPA site ID COD980499248 (U.S. EPA Superfund (SEMS/NPL)) Agency record

    Severity 10

  3. Southern Foods Group Llc D/B/A Meadow Gold Dairies, Englewood

    TRI reporting facility.

    EPA FRS registry ID 110000495321 (U.S. EPA ECHO) Agency record

    Severity 7.4

  4. Clean Harbors Deer Trail Llc, Deer Trail

    Large hazardous waste generator. Penalties $39,360.

    EPA FRS registry ID 110060947329 (U.S. EPA ECHO) Agency record

    Severity 7

  5. American Stainless Steel Corp, Englewood

    Toxic chemical release facility (TRI). Chemicals: Nickel, Manganese, Phosphorus (yellow or white). Reports carcinogens. 250 lbs released over 5 years.

    TRI facility ID 80110MRCNS1600W (U.S. EPA Toxics Release Inventory)

    Severity 6.3

  6. U.S. Dod Usaf Buckley Sfb Co, Aurora

    Toxic chemical release facility (TRI). Chemicals: Naphthalene, Ethylbenzene. Reports carcinogens. 212 lbs released over 5 years.

    TRI facility ID 80011SRFRC18401 (U.S. EPA Toxics Release Inventory)

    Severity 6.3

  7. Safety-Kleen Systems Inc - Englewood, Englewood

    Large hazardous waste generator.

    EPA FRS registry ID 110072218580 (U.S. EPA ECHO) Agency record

    Severity 6

  8. Safety-Kleen Systems Englewood (Eco), Englewood

    Toxic chemical release facility (TRI). Chemicals: Methanol, Benzo[g,h,i]perylene, Polycyclic aromatic compounds. Reports carcinogens. 12 lbs released over 5 years.

    TRI facility ID 8011WSFTYK281SU (U.S. EPA Toxics Release Inventory)

    Severity 5.4

  9. Preferred Medical Products, Englewood

    NPDES wastewater discharge permit. Penalties $37,567.

    EPA FRS registry ID 110024830959 (U.S. EPA ECHO) Agency record

    Severity 5

  10. Clean Harbors Deer Trail Llc, Deer Trail

    Hazardous waste transporter. Penalties $39,360.

    EPA FRS registry ID 110060947329 (U.S. EPA ECHO) Agency record

    Severity 5

  11. U.S. Dod Usaf Buckley Afb Co, Aurora

    TRI reporting facility.

    EPA FRS registry ID 110022521582 (U.S. EPA ECHO) Agency record

    Severity 4.8

  12. Crestone Peak - Rush 4-65 29-30 South, Aurora

    Major air pollution source. Penalties $147,875.

    EPA FRS registry ID 110070666649 (U.S. EPA ECHO) Agency record

    Severity 4.8

  13. Crestone Peak - Property Reserve 4-65 3-, Aurora

    Major air pollution source. Penalties $105,000.

    EPA FRS registry ID 110071176523 (U.S. EPA ECHO) Agency record

    Severity 4.8

  14. Southern Foods Group Llc D/B/A Meadow Gold Dairies, Englewood

    NPDES wastewater discharge permit.

    EPA FRS registry ID 110000495321 (U.S. EPA ECHO) Agency record

    Severity 4.5

  15. Colorado Auto And Parts, Englewood

    NPDES wastewater discharge permit.

    EPA FRS registry ID 110002969440 (U.S. EPA ECHO) Agency record

    Severity 4.5

  16. Air Methods Llc, Englewood

    Small hazardous waste generator.

    EPA FRS registry ID 110002988358 (U.S. EPA ECHO) Agency record

    Severity 4.5

  17. Preferred Machining, Englewood

    NPDES wastewater discharge permit.

    EPA FRS registry ID 110002992129 (U.S. EPA ECHO) Agency record

    Severity 4.5

  18. Foxridge Farms Mhp-Chlorinator For Denver West Well, Aurora

    NPDES wastewater discharge permit.

    EPA FRS registry ID 110006658223 (U.S. EPA ECHO) Agency record

    Severity 4.5

  19. Veolia Transportation Denver, Englewood

    NPDES wastewater discharge permit.

    EPA FRS registry ID 110032627548 (U.S. EPA ECHO) Agency record

    Severity 4.5

  20. Stolle Machineryco Centennial, Centennial

    NPDES wastewater discharge permit.

    EPA FRS registry ID 110037147913 (U.S. EPA ECHO) Agency record

    Severity 4.5

  21. 34501 East Quincy Avenue Wwtf, Aurora

    NPDES wastewater discharge permit.

    EPA FRS registry ID 110037456589 (U.S. EPA ECHO) Agency record

    Severity 4.5

  22. Lincoln Park Metro Dist Ms4, Greenwood Village

    NPDES wastewater discharge permit.

    EPA FRS registry ID 110043731977 (U.S. EPA ECHO) Agency record

    Severity 4.5

  23. Columbine Valley Ms4, Columbine Valley

    NPDES wastewater discharge permit.

    EPA FRS registry ID 110043732075 (U.S. EPA ECHO) Agency record

    Severity 4.5

  24. Community College Of Aurora Ms4, Aurora

    NPDES wastewater discharge permit.

    EPA FRS registry ID 110043732486 (U.S. EPA ECHO) Agency record

    Severity 4.5

  25. Arapahoe Community College, Littleton

    NPDES wastewater discharge permit.

    EPA FRS registry ID 110043732495 (U.S. EPA ECHO) Agency record

    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 Arapahoe County

  • Colorado 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 Arapahoe County, and their findings.

  • Colorado vital statistics office

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

  • Colorado health department, environmental epidemiology

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

  • Colorado 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.

  • Colorado 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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