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Harrison County, Mississippi: environmental and disease records

Cancer mortality in Harrison County is 180.8 deaths per 100,000 people per year against a U.S. rate of 143.2, a statistically significant excess. The strongest disease signals are Liver & bile duct deaths at 1.6 times the U.S. rate and Lung & bronchus deaths at 1.6 times the U.S. rate. Federal databases place 722 regulated facilities, sites and hazards inside the county, led by NPDES wastewater discharge permit (339), Rail grade crossing (176), Gas station (mapped facility) (59). 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: 30.4865, -89.1125.

How this county ranks in Mississippi

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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 Harrison County compared with the United States
Cancer	Measure	County rate	U.S. rate	Times U.S.	95% interval	Years
Liver & bile duct	Deaths	10.8	6.6	1.64xSignificant	9 to 12.7	2020-2024
Lung & bronchus	Deaths	47.1	30.2	1.56xSignificant	43.4 to 51	2020-2024
Bladder	Deaths	5.9	4.1	1.44xSignificant	4.6 to 7.5	2020-2024
Lung & bronchus	New cases	74.1	51.8	1.43xSignificant	69.5 to 79	2019-2023
Liver & bile duct	New cases	12.1	8.7	1.39xSignificant	10.3 to 14.2	2019-2023
Kidney & renal pelvis	New cases	22.9	17.9	1.28xSignificant	20.3 to 25.8	2019-2023
Kidney & renal pelvis	Deaths	4.3	3.4	1.26x	3.2 to 5.6	2020-2024
All cancer	Deaths	180.8	143.2	1.26xSignificant	173.4 to 188.5	2020-2024
Non-Hodgkin lymphoma	Deaths	5.9	4.8	1.23x	4.6 to 7.4	2020-2024
Leukemia	Deaths	6.8	5.7	1.19x	5.4 to 8.5	2020-2024
Stomach	Deaths	3.2	2.7	1.19x	2.3 to 4.5	2020-2024
Stomach	New cases	7.8	6.6	1.18x	6.3 to 9.6	2019-2023
Bladder	New cases	21.8	18.7	1.17xSignificant	19.2 to 24.6	2019-2023
Melanoma of the skin	Deaths	2.3	2	1.15x	1.5 to 3.4	2020-2024
Pancreas	New cases	15.7	13.9	1.13x	13.5 to 18.1	2019-2023
Leukemia	New cases	16.3	14.5	1.12x	14 to 18.9	2019-2023
All cancer	New cases	494.4	453.4	1.09xSignificant	481.9 to 507.2	2019-2023
Pancreas	Deaths	12.1	11.3	1.07x	10.3 to 14.2	2020-2024
Brain & nervous system	Deaths	4.7	4.4	1.07x	3.5 to 6.1	2020-2024
Non-Hodgkin lymphoma	New cases	18.2	18.5	0.98x	15.9 to 20.8	2019-2023
Melanoma of the skin	New cases	23.3	23.8	0.98x	20.6 to 26.3	2019-2023
Childhood cancer (under 15)	New cases	15.7	16.4	0.96x	10.8 to 22.1	2019-2023
Esophagus	New cases	4.4	4.6	0.96x	3.3 to 5.7	2019-2023
Brain & nervous system	New cases	5.2	6.2	0.84x	3.9 to 6.7	2019-2023
Esophagus	Deaths	2.9	3.7	0.78x	2 to 4	2020-2024
Thyroid	New cases	7.2	13	0.55x	5.7 to 9.1	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 Harrison County
Measure	County	U.S. median	Difference	Unit
Premature death	11,924.7	9,842.6	+21%	years of life lost before age 75 per 100,000
Life expectancy	73	75.3	-3%	years
Child mortality	66.1	59.8	+11%	deaths under age 18 per 100,000
Infant mortality	7	6.2	+12%	deaths under age 1 per 1,000 live births
Injury deaths	96.7	96.9	-0%	deaths per 100,000
Drug overdose deaths	36.9	28.6	+29%	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.

Formaldehyde22.02 per million
Carbon Tetrachloride2.91 per million
Acetaldehyde1.75 per million
Benzene0.77 per million

EPA Air Quality Index 2025

Monitored on 365 days: 252 good, 0 unhealthy for sensitive groups or worse. Median AQI 43, peak 97.

Regulated facilities, sites and hazards by type

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

NPDES wastewater discharge permit339
Rail grade crossing176
Gas station (mapped facility)59
Air permit holder (minor source)29
Brownfield property26
Small hazardous waste generator14
Toxic chemical release facility (TRI)13
TRI reporting facility11
Auto repair or body shop (mapped facility)10
Major air pollution source9
Large hazardous waste generator7
Hazardous waste transporter6
Scrapyard (mapped facility)6
Landfill (mapped facility)5
Public airport2
Commercial airport2
Large greenhouse gas emitter2
Heliport2
EPA air quality monitor1
Gas power plant1
Solar 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.

Chemours Delisle Plant, Pass Christian
TRI reporting facility. Penalties $78,750.
EPA FRS registry ID 110005985416 (U.S. EPA ECHO) Agency record
Severity 10
Chemfax, Inc., Gulfport
Superfund (NPL) site. Hazard Ranking System score 38.4. NPL Site.
EPA site ID MSD008154486 (U.S. EPA Superfund (SEMS/NPL)) Agency record
Severity 10
Chemours Delisle Plant, Pass Christian
Toxic chemical release facility (TRI). Chemicals: Manganese compounds, Manganese And Manganese Compounds, Chromium compounds (except for chromite ore mined in the Transvaal Region), Vanadium compounds and 4 more. Reports carcinogens. 59,277,401 lbs released over 5 years.
TRI facility ID 39571DPNTD7685K (U.S. EPA Toxics Release Inventory)
Severity 10
Us Navy Camp Keller Small Arms Range, Biloxi
Toxic chemical release facility (TRI). Chemicals: Lead. Reports carcinogens. 126,964 lbs released over 5 years.
TRI facility ID 3953WCMPKL1641H (U.S. EPA Toxics Release Inventory)
Severity 8.4
United States Marine Inc., Gulfport
TRI reporting facility. Penalties $300,000.
EPA FRS registry ID 110031000093 (U.S. EPA ECHO) Agency record
Severity 8.1
Ambit Chemical Technologies, Gulfport
Toxic chemical release facility (TRI). Chemicals: Formaldehyde, Xylene (mixed isomers), Methanol, Ethylbenzene and 4 more. Reports carcinogens. 16,016 lbs released over 5 years.
TRI facility ID 3950WCHNNL14373 (U.S. EPA Toxics Release Inventory)
Severity 7.7
Us Marine Inc., Gulfport
Toxic chemical release facility (TRI). Chemicals: Styrene. Reports carcinogens. 10,160 lbs released over 5 years.
TRI facility ID 39503NTDST111LR (U.S. EPA Toxics Release Inventory)
Severity 7.6
Chemours Delisle Plant, Pass Christian
Major air pollution source. Penalties $78,750.
EPA FRS registry ID 110005985416 (U.S. EPA ECHO) Agency record
Severity 7.3
Seemann Composites Llc, Gulfport
Toxic chemical release facility (TRI). Chemicals: Styrene. Reports carcinogens. 3,738 lbs released over 5 years.
TRI facility ID 39503SMNNC12481 (U.S. EPA Toxics Release Inventory)
Severity 7.2
Hartson-Kennedy Inc, Gulfport
Toxic chemical release facility (TRI). Chemicals: Toluene, Cyclohexane. 260,416 lbs released over 5 years.
TRI facility ID 39506HRTSN10115 (U.S. EPA Toxics Release Inventory)
Severity 7.2
Ambit Chemical Technologies, Gulfport
TRI reporting facility.
EPA FRS registry ID 110000537893 (U.S. EPA ECHO) Agency record
Severity 7.1
Chemours Delisle Plant, Pass Christian
Large hazardous waste generator. Penalties $78,750.
EPA FRS registry ID 110005985416 (U.S. EPA ECHO) Agency record
Severity 6.8
Chemours Delisle Plant, Pass Christian
NPDES wastewater discharge permit. Penalties $78,750.
EPA FRS registry ID 110005985416 (U.S. EPA ECHO) Agency record
Severity 6.8
Gulf Ship Llc, Gulfport
Toxic chemical release facility (TRI). Chemicals: Zinc compounds, Manganese, Chromium, Nickel and 3 more. Reports carcinogens. 620 lbs released over 5 years.
TRI facility ID 39503GLFSH12351 (U.S. EPA Toxics Release Inventory)
Severity 6.6
Hartson Kennedy Cabinet Top Company Inc, Gulfport
TRI reporting facility.
EPA FRS registry ID 110000377360 (U.S. EPA ECHO) Agency record
Severity 6.4
Chemours Delisle Plant, Pass Christian
Large greenhouse gas emitter. Penalties $78,750.
EPA FRS registry ID 110005985416 (U.S. EPA ECHO) Agency record
Severity 6.3
Camp Keller Small Arms Range, Biloxi
TRI reporting facility.
EPA FRS registry ID 110040530761 (U.S. EPA ECHO) Agency record
Severity 5.9
Soprema Inc, Gulfport
Toxic chemical release facility (TRI). Chemicals: Polycyclic aromatic compounds. Reports carcinogens. 58 lbs released over 5 years.
TRI facility ID 3950WSPRML12251 (U.S. EPA Toxics Release Inventory)
Severity 5.9
Us Dod Usaf Keesler Afb, Biloxi
Large hazardous waste generator.
EPA FRS registry ID 110042023887 (U.S. EPA ECHO) Agency record
Severity 5.8
United States Marine Inc., Gulfport
Large hazardous waste generator. Penalties $300,000.
EPA FRS registry ID 110031000093 (U.S. EPA ECHO) Agency record
Severity 5.5
Seemann Composites, Llc, Gulfport
TRI reporting facility.
EPA FRS registry ID 110002216735 (U.S. EPA ECHO) Agency record
Severity 5.3
Mississippi Power Company, Plant Jack Watson, Gulfport
Major air pollution source. Penalties $26,250.
EPA FRS registry ID 110000590851 (U.S. EPA ECHO) Agency record
Severity 5.3
Gulfport Youth Court, Gulfport
EPA air quality monitor.
Record ID 280470008 (U.S. EPA AirData)
Severity 5
Gulfport-Biloxi Intl, Gulfport
Commercial airport. O.
Record ID GPT (FAA / U.S. DOT)
Severity 5
Mmc Materials Gulf Coast Llc - Gulfport, Gulfport
Toxic chemical release facility (TRI). Chemicals: Lead. Reports carcinogens. 2 lbs released over 5 years.
TRI facility ID 3950WBYCNC14312 (U.S. EPA Toxics Release Inventory)
Severity 4.9

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 Harrison County

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