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Dorchester County, South Carolina: environmental and disease records

Cancer mortality in Dorchester County is 148.8 deaths per 100,000 people per year against a U.S. rate of 143.2. Federal databases place 707 regulated facilities, sites and hazards inside the county, led by NPDES wastewater discharge permit (439), Rail grade crossing (84), Air permit holder (minor source) (47). One correctional facility operates in the county. 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: 33.077, -80.4322.

How this county ranks in South Carolina

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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 Dorchester County compared with the United States
CancerMeasureCounty rateU.S. rateTimes U.S.95% intervalYears
Childhood cancer (under 15)New cases21.716.41.32x15.2 to 30.12019-2023
Non-Hodgkin lymphomaDeaths64.81.25x4.5 to 7.92020-2024
Lung & bronchusNew cases61.751.81.19xSignificant56.7 to 672019-2023
Kidney & renal pelvisNew cases21.317.91.19xSignificant18.4 to 24.52019-2023
PancreasNew cases16.213.91.17x13.7 to 192019-2023
PancreasDeaths12.811.31.13x10.6 to 15.32020-2024
Lung & bronchusDeaths33.630.21.11x30 to 37.62020-2024
StomachNew cases7.26.61.09x5.6 to 9.22019-2023
All cancerNew cases485.7453.41.07xSignificant471.3 to 500.42019-2023
EsophagusNew cases4.94.61.07x3.6 to 6.52019-2023
All cancerDeaths148.8143.21.04x140.9 to 157.12020-2024
Non-Hodgkin lymphomaNew cases19.218.51.04x16.3 to 22.42019-2023
Liver & bile ductNew cases98.71.03x7.2 to 11.22019-2023
BladderNew cases18.718.71x15.9 to 21.92019-2023
ThyroidNew cases13131x10.6 to 15.72019-2023
Brain & nervous systemNew cases6.16.20.98x4.6 to 8.12019-2023
EsophagusDeaths3.63.70.97x2.5 to 52020-2024
BladderDeaths3.94.10.95x2.7 to 5.52020-2024
LeukemiaDeaths5.45.70.95x4 to 7.32020-2024
LeukemiaNew cases13.514.50.93x11.2 to 16.32019-2023
Melanoma of the skinNew cases22.123.80.93x19.1 to 25.42019-2023
Kidney & renal pelvisDeaths3.13.40.91x2 to 4.52020-2024
Brain & nervous systemDeaths44.40.91x2.8 to 5.52020-2024
StomachDeaths2.22.70.81x1.4 to 3.52020-2024
Liver & bile ductDeaths4.76.60.71x3.4 to 6.32020-2024

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 Dorchester County
MeasureCountyU.S. medianDifferenceUnit
Premature death8,693.39,842.6-12%years of life lost before age 75 per 100,000
Life expectancy76.475.3+2%years
Child mortality55.259.8-8%deaths under age 18 per 100,000
Infant mortality66.2-4%deaths under age 1 per 1,000 live births
Injury deaths86.796.9-11%deaths per 100,000
Drug overdose deaths30.328.6+6%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.

  • Formaldehyde21.55 per million
  • Carbon Tetrachloride2.93 per million
  • Acetaldehyde2.05 per million
  • Benzene0.92 per million

EPA Air Quality Index

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

Regulated facilities, sites and hazards by type

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

  • NPDES wastewater discharge permit439
  • Rail grade crossing84
  • Air permit holder (minor source)47
  • Gas station (mapped facility)40
  • Small hazardous waste generator19
  • Toxic chemical release facility (TRI)18
  • TRI reporting facility14
  • Auto repair or body shop (mapped facility)13
  • Major air pollution source12
  • Large greenhouse gas emitter5
  • Large hazardous waste generator5
  • Brownfield property4
  • Dry cleaner (mapped facility)2
  • Public airport1
  • Commercial airport1
  • Correctional facility (prison or jail)1
  • Hazardous waste transporter1
  • Biomass 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. Quikrete Construction Materials, Llc - Harleyville Cement Plant, Harleyville

    TRI reporting facility. Penalties $85,000.

    EPA FRS registry ID 110001666064 (U.S. EPA ECHO) Agency record

    Severity 10

  2. Hm Southeast Cement Llc/Harleyville Site, Harleyville

    TRI reporting facility. Penalties $41,710.

    EPA FRS registry ID 110000560544 (U.S. EPA ECHO) Agency record

    Severity 9.7

  3. Giant Cement Co, Harleyville

    Toxic chemical release facility (TRI). Chemicals: Methanol, Dichloromethane, Ammonia, Toluene and 4 more. Reports carcinogens. Reports PFAS. 32,126 lbs released over 5 years.

    TRI facility ID 29448GNTCMPOBOX (U.S. EPA Toxics Release Inventory)

    Severity 9.5

  4. Resonac Graphite America Inc.130130, Ridgeville

    TRI reporting facility. Penalties $64,200.

    EPA FRS registry ID 110000353590 (U.S. EPA ECHO) Agency record

    Severity 9.2

  5. Sportsman Boat Manufacturing Inc., Summerville

    Toxic chemical release facility (TRI). Chemicals: Styrene, Methyl methacrylate. Reports carcinogens. 781,804 lbs released over 5 years.

    TRI facility ID 2948WSPRTS113IS (U.S. EPA Toxics Release Inventory)

    Severity 9

  6. Scout Boats Inc, Summerville

    Toxic chemical release facility (TRI). Chemicals: Styrene, Methyl methacrylate, Diisocyanates. Reports carcinogens. 632,452 lbs released over 5 years.

    TRI facility ID 29483SCTBT2531H (U.S. EPA Toxics Release Inventory)

    Severity 9

  7. Key West Boats Inc. Plant 1 (Ridgeville), Ridgeville

    Toxic chemical release facility (TRI). Chemicals: Styrene, Methyl methacrylate. Reports carcinogens. 546,855 lbs released over 5 years.

    TRI facility ID 29472KYWSTRTE1R (U.S. EPA Toxics Release Inventory)

    Severity 8.9

  8. Key West Boats Inc. Plant 2 (Summerville), Summerville

    Toxic chemical release facility (TRI). Chemicals: Styrene. Reports carcinogens. 215,025 lbs released over 5 years.

    TRI facility ID 29485KYWST421IN (U.S. EPA Toxics Release Inventory)

    Severity 8.6

  9. Cutting Edge Composites, Summerville

    Toxic chemical release facility (TRI). Chemicals: Styrene. Reports carcinogens. 123,025 lbs released over 5 years.

    TRI facility ID 29483CTTNG213JE (U.S. EPA Toxics Release Inventory)

    Severity 8.4

  10. Resonac Graphite America Inc, Ridgeville

    Toxic chemical release facility (TRI). Chemicals: Polycyclic aromatic compounds, Phenanthrene, Benzo[g,h,i]perylene. Reports carcinogens. 8,996 lbs released over 5 years.

    TRI facility ID 29472RCCRB19COU (U.S. EPA Toxics Release Inventory)

    Severity 7.5

  11. Hm Southeast Cement Llc/Harleyville Site, Harleyville

    Major air pollution source. Penalties $41,710.

    EPA FRS registry ID 110000560544 (U.S. EPA ECHO) Agency record

    Severity 7.5

  12. Quikrete Construction Materials, Llc - Harleyville Cement Plant, Harleyville

    Major air pollution source. Penalties $85,000.

    EPA FRS registry ID 110001666064 (U.S. EPA ECHO) Agency record

    Severity 7.5

  13. Resonac Graphite America Inc.130130, Ridgeville

    Major air pollution source. Penalties $64,200.

    EPA FRS registry ID 110000353590 (U.S. EPA ECHO) Agency record

    Severity 7.3

  14. Hm Southeast Cement Llc/Harleyville Site, Harleyville

    Large hazardous waste generator. Penalties $41,710.

    EPA FRS registry ID 110000560544 (U.S. EPA ECHO) Agency record

    Severity 7

  15. Hm Southeast Cement Llc/Harleyville Site, Harleyville

    NPDES wastewater discharge permit. Penalties $41,710.

    EPA FRS registry ID 110000560544 (U.S. EPA ECHO) Agency record

    Severity 7

  16. Quikrete Construction Materials, Llc - Harleyville Cement Plant, Harleyville

    NPDES wastewater discharge permit. Penalties $85,000.

    EPA FRS registry ID 110001666064 (U.S. EPA ECHO) Agency record

    Severity 7

  17. Argos Cement Harleyville Plant, Harleyville

    Toxic chemical release facility (TRI). Chemicals: Ammonia, Zinc compounds, Manganese compounds, Manganese And Manganese Compounds and 4 more. 81,834 lbs released over 5 years.

    TRI facility ID 29448BLCRC463JU (U.S. EPA Toxics Release Inventory)

    Severity 6.8

  18. Resonac Graphite America Inc.130130, Ridgeville

    NPDES wastewater discharge permit. Penalties $64,200.

    EPA FRS registry ID 110000353590 (U.S. EPA ECHO) Agency record

    Severity 6.8

  19. Hm Southeast Cement Llc/Harleyville Site, Harleyville

    Large greenhouse gas emitter. Penalties $41,710.

    EPA FRS registry ID 110000560544 (U.S. EPA ECHO) Agency record

    Severity 6.5

  20. Quikrete Construction Materials, Llc - Harleyville Cement Plant, Harleyville

    Large greenhouse gas emitter. Penalties $85,000.

    EPA FRS registry ID 110001666064 (U.S. EPA ECHO) Agency record

    Severity 6.5

  21. Sportsman Boat Manufacturing Inc, Summerville

    TRI reporting facility.

    EPA FRS registry ID 110058899367 (U.S. EPA ECHO) Agency record

    Severity 6.4

  22. Scout Boats, Summerville

    TRI reporting facility.

    EPA FRS registry ID 110000918240 (U.S. EPA ECHO) Agency record

    Severity 6.4

  23. Raisio Staest U S Inc, Summerville

    TRI reporting facility. Penalties $3,000.

    EPA FRS registry ID 110002100547 (U.S. EPA ECHO) Agency record

    Severity 6.3

  24. Key West Boats Expansion, Ridgeville

    TRI reporting facility.

    EPA FRS registry ID 110000353581 (U.S. EPA ECHO) Agency record

    Severity 6.3

  25. Resonac Graphite America Inc.130130, Ridgeville

    Large greenhouse gas emitter. Penalties $64,200.

    EPA FRS registry ID 110000353590 (U.S. EPA ECHO) Agency record

    Severity 6.3

Correctional facilities

Prisons, jails and corrections operations with an EPA facility record, and the drinking water and wastewater compliance attached to them.

Discovery / public records

Records to request for Dorchester County

  • South Carolina 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 Dorchester County, and their findings.

  • South Carolina vital statistics office

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

  • South Carolina health department, environmental epidemiology

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

  • South Carolina 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.

  • South Carolina 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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