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Delaware County, Pennsylvania: environmental and disease records

Cancer mortality in Delaware County is 146.4 deaths per 100,000 people per year against a U.S. rate of 143.2. Federal databases place 1,532 regulated facilities, sites and hazards inside the county, led by NPDES wastewater discharge permit (560), Air permit holder (minor source) (294), Rail grade crossing (155). 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: 39.934, -75.3781.

How this county ranks in Pennsylvania

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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 Delaware County compared with the United States
CancerMeasureCounty rateU.S. rateTimes U.S.95% intervalYears
Liver & bile ductDeaths7.16.61.08x6.2 to 82020-2024
Childhood cancer (under 15)New cases17.416.41.06x14 to 21.42019-2023
PancreasDeaths11.811.31.04x10.8 to 132020-2024
Lung & bronchusDeaths3130.21.03x29.3 to 32.92020-2024
BladderDeaths4.24.11.02x3.5 to 4.92020-2024
All cancerDeaths146.4143.21.02x142.5 to 150.52020-2024
PancreasNew cases1413.91.01x12.8 to 15.32019-2023
EsophagusNew cases4.64.61x3.9 to 5.32019-2023
ThyroidDeaths0.50.51x0.3 to 0.82020-2024
Lung & bronchusNew cases50.851.80.98x48.5 to 53.22019-2023
EsophagusDeaths3.63.70.97x3.1 to 4.32020-2024
BladderNew cases17.918.70.96x16.6 to 19.42019-2023
Brain & nervous systemNew cases5.96.20.95x5.1 to 6.82019-2023
Melanoma of the skinDeaths1.920.95x1.5 to 2.42020-2024
Brain & nervous systemDeaths4.14.40.93x3.4 to 4.82020-2024
Liver & bile ductNew cases8.18.70.93x7.2 to 9.12019-2023
LeukemiaDeaths5.35.70.93x4.5 to 6.12020-2024
Non-Hodgkin lymphomaNew cases17.218.50.93x15.9 to 18.72019-2023
ThyroidNew cases12130.92x10.8 to 13.32019-2023
All cancerNew cases414.2453.40.91x407.4 to 421.12019-2023
StomachDeaths2.42.70.89x1.9 to 2.92020-2024
Non-Hodgkin lymphomaDeaths4.14.80.85x3.4 to 4.82020-2024
Kidney & renal pelvisNew cases1517.90.84x13.8 to 16.42019-2023
StomachNew cases5.56.60.83x4.7 to 6.42019-2023
Kidney & renal pelvisDeaths2.53.40.74x2 to 3.12020-2024
LeukemiaNew cases8.914.50.61x7.9 to 102019-2023
Melanoma of the skinNew cases1323.80.55x11.8 to 14.32019-2023

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 Delaware County
MeasureCountyU.S. medianDifferenceUnit
Premature death7,707.79,842.6-22%years of life lost before age 75 per 100,000
Life expectancy77.675.3+3%years
Child mortality52.259.8-13%deaths under age 18 per 100,000
Infant mortality6.56.2+5%deaths under age 1 per 1,000 live births
Injury deaths82.696.9-15%deaths per 100,000
Drug overdose deaths34.428.6+20%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.

  • Formaldehyde19.6 per million
  • Carbon Tetrachloride2.99 per million
  • Ethylene Oxide2.35 per million
  • Benzene2.15 per million

EPA Air Quality Index 2025

Monitored on 365 days: 238 good, 3 unhealthy for sensitive groups or worse. Median AQI 44, peak 153.

Regulated facilities, sites and hazards by type

1,532 active records inside the county from EPA ECHO, TRI, Superfund, Brownfields, NPDES, EIA, FAA, FRA and corrections data.

  • NPDES wastewater discharge permit560
  • Air permit holder (minor source)294
  • Rail grade crossing155
  • Small hazardous waste generator126
  • Gas station (mapped facility)115
  • Auto repair or body shop (mapped facility)109
  • Dry cleaner (mapped facility)29
  • Hazardous waste transporter25
  • Large hazardous waste generator23
  • Toxic chemical release facility (TRI)21
  • Major air pollution source20
  • TRI reporting facility18
  • Large greenhouse gas emitter8
  • Heliport5
  • Gas power plant4
  • Wastewater plant (mapped facility)4
  • Scrapyard (mapped facility)3
  • Superfund (NPL) site3
  • EPA air quality monitor2
  • Brownfield property2
  • Airfield1
  • Commercial airport1
  • Crematorium (mapped facility)1
  • Landfill (mapped facility)1
  • Biomass power plant1
  • Oil-fired 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.

  1. Monroe Energy, Llc - Trainer Refinery, Trainer

    TRI reporting facility. Penalties $86,480.

    EPA FRS registry ID 110000336440 (U.S. EPA ECHO) Agency record

    Severity 10

  2. Havertown PCP, Haverford

    Superfund (NPL) site. Hazard Ranking System score 38.3. NPL Site.

    EPA site ID PAD002338010 (U.S. EPA Superfund (SEMS/NPL)) Agency record

    Severity 10

  3. Metro Container Corporation, Trainer

    Superfund (NPL) site. Hazard Ranking System score 50. NPL Site.

    EPA site ID PAD044545895 (U.S. EPA Superfund (SEMS/NPL)) Agency record

    Severity 10

  4. Lower Darby Creek Area, Darby Township

    Superfund (NPL) site. Hazard Ranking System score 50. NPL Site.

    EPA site ID PASFN0305521 (U.S. EPA Superfund (SEMS/NPL)) Agency record

    Severity 10

  5. Monroe Energy Llc-Trainer Refinery, Trainer

    Toxic chemical release facility (TRI). Chemicals: Nitrate compounds (water dissociable; reportable only when in aqueous solution), Xylene (mixed isomers), n-Hexane, Toluene and 4 more. Reports carcinogens. 1,776,521 lbs released over 5 years.

    TRI facility ID 19061BPLCMPOSTR (U.S. EPA Toxics Release Inventory)

    Severity 9.3

  6. Evonik Corp/Chester, Chester

    TRI reporting facility. Penalties $1,875.

    EPA FRS registry ID 110000336100 (U.S. EPA ECHO) Agency record

    Severity 9.2

  7. Energy Transfer Marcus Hook Terminal, Marcus Hook

    TRI reporting facility. Penalties $766,996.

    EPA FRS registry ID 110032885723 (U.S. EPA ECHO) Agency record

    Severity 8.5

  8. Braskem Amer Inc/Marcus Hook, Marcus Hook

    TRI reporting facility. Penalties $2,700.

    EPA FRS registry ID 110000584706 (U.S. EPA ECHO) Agency record

    Severity 8.3

  9. Chester Specialty Chem / Chester City, Chester

    TRI reporting facility. Penalties $202,818.

    EPA FRS registry ID 110000336093 (U.S. EPA ECHO) Agency record

    Severity 7.6

  10. Sunoco Llc-Race Fuels, Marcus Hook

    Toxic chemical release facility (TRI). Chemicals: Toluene, Benzene, Lead And Lead Compounds, Ethylbenzene and 4 more. Reports carcinogens. 8,684 lbs released over 5 years.

    TRI facility ID 19061SNRFNGREEN (U.S. EPA Toxics Release Inventory)

    Severity 7.5

  11. Monroe Energy, Llc - Trainer Refinery, Trainer

    Major air pollution source. Penalties $86,480.

    EPA FRS registry ID 110000336440 (U.S. EPA ECHO) Agency record

    Severity 7.5

  12. Entegris Inc., Chester

    Toxic chemical release facility (TRI). Chemicals: Toluene, Methanol, Xylene (mixed isomers), n-Hexane and 2 more. Reports carcinogens. 5,115 lbs released over 5 years.

    TRI facility ID 19013NRQYT800WF (U.S. EPA Toxics Release Inventory)

    Severity 7.3

  13. Braskem America Inc, Marcus Hook

    Toxic chemical release facility (TRI). Chemicals: Propylene, Copper compounds, Aluminum oxide (fibrous forms). 228,267 lbs released over 5 years.

    TRI facility ID 19061PSLNPBLUEB (U.S. EPA Toxics Release Inventory)

    Severity 7.1

  14. Evonik Corp/Chester, Chester

    Major air pollution source. Penalties $1,875.

    EPA FRS registry ID 110000336100 (U.S. EPA ECHO) Agency record

    Severity 7

  15. Monroe Energy, Llc - Trainer Refinery, Trainer

    Large hazardous waste generator. Penalties $86,480.

    EPA FRS registry ID 110000336440 (U.S. EPA ECHO) Agency record

    Severity 7

  16. Monroe Energy, Llc - Trainer Refinery, Trainer

    NPDES wastewater discharge permit. Penalties $86,480.

    EPA FRS registry ID 110000336440 (U.S. EPA ECHO) Agency record

    Severity 7

  17. Covanta Delaware Valley Lp - Delaware Valley Res Rec, Chester

    Major air pollution source. Penalties $270,967.

    EPA FRS registry ID 110001065016 (U.S. EPA ECHO) Agency record

    Severity 7

  18. Marcus Hook Terminal, Marcus Hook

    Large hazardous waste generator. Penalties $2,500.

    EPA FRS registry ID 110055417838 (U.S. EPA ECHO) Agency record

    Severity 7

  19. Esschem Div Of Justi Group Inc/Linwood, Linwood

    TRI reporting facility. Penalties $3,300.

    EPA FRS registry ID 110000336459 (U.S. EPA ECHO) Agency record

    Severity 6.8

  20. Evonik Corp/Chester, Chester

    NPDES wastewater discharge permit. Penalties $1,875.

    EPA FRS registry ID 110000336100 (U.S. EPA ECHO) Agency record

    Severity 6.5

  21. Monroe Energy, Llc - Trainer Refinery, Trainer

    Large greenhouse gas emitter. Penalties $86,480.

    EPA FRS registry ID 110000336440 (U.S. EPA ECHO) Agency record

    Severity 6.5

  22. Pyromet Llc, Aston

    TRI reporting facility. Penalties $5,000.

    EPA FRS registry ID 110001061715 (U.S. EPA ECHO) Agency record

    Severity 6.5

  23. Covanta Delaware Valley Lp - Delaware Valley Res Rec, Chester

    NPDES wastewater discharge permit. Penalties $270,967.

    EPA FRS registry ID 110001065016 (U.S. EPA ECHO) Agency record

    Severity 6.5

  24. Delcora Treatment Plant - Wrtp, Chester

    Major air pollution source. Penalties $62,075.

    EPA FRS registry ID 110007765971 (U.S. EPA ECHO) Agency record

    Severity 6.5

  25. Energy Transfer Marcus Hook Terminal, Marcus Hook

    Major air pollution source. Penalties $766,996.

    EPA FRS registry ID 110032885723 (U.S. EPA ECHO) Agency record

    Severity 6.5

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 Delaware County

  • Pennsylvania 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 Delaware County, and their findings.

  • Pennsylvania vital statistics office

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

  • Pennsylvania health department, environmental epidemiology

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

  • Pennsylvania 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.

  • Pennsylvania 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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