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Iberville Parish, Louisiana: environmental and disease records

Cancer mortality in Iberville Parish is 189 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 1.8 times the U.S. rate and Lung & bronchus deaths at 1.7 times the U.S. rate. Federal databases place 884 regulated facilities, sites and hazards inside the county, led by Industrial wastewater discharge (348), NPDES wastewater discharge permit (160), Air permit holder (minor source) (97). 2 correctional facilities operate in the county. EPA AirToxScreen estimates a lifetime cancer risk from outdoor air toxics of 50 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: 30.261, -91.316.

How this county ranks in Louisiana

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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 Iberville Parish compared with the United States
Cancer	Measure	County rate	U.S. rate	Times U.S.	95% interval	Years
Liver & bile duct	New cases	21.9	8.7	2.52xSignificant	15.8 to 29.8	2019-2023
Stomach	New cases	13.2	6.6	2xSignificant	8.4 to 19.8	2019-2023
Liver & bile duct	Deaths	12.1	6.6	1.83xSignificant	8 to 18	2020-2024
Kidney & renal pelvis	New cases	31.6	17.9	1.77xSignificant	23.9 to 41	2019-2023
Lung & bronchus	Deaths	50.7	30.2	1.68xSignificant	41.3 to 61.9	2020-2024
Lung & bronchus	New cases	85.5	51.8	1.65xSignificant	73 to 99.8	2019-2023
Leukemia	Deaths	9	5.7	1.58x	5.1 to 14.9	2020-2024
Leukemia	New cases	19.6	14.5	1.35x	13.5 to 27.6	2019-2023
All cancer	New cases	603.2	453.4	1.33xSignificant	568.1 to 640	2019-2023
All cancer	Deaths	189	143.2	1.32xSignificant	170 to 209.7	2020-2024
Pancreas	New cases	16.7	13.9	1.2x	11.4 to 23.9	2019-2023
Pancreas	Deaths	12.8	11.3	1.13x	8.2 to 19.3	2020-2024
Bladder	New cases	20.4	18.7	1.09x	14.4 to 28.2	2019-2023
Thyroid	New cases	14.1	13	1.08x	9 to 21.1	2019-2023
Non-Hodgkin lymphoma	New cases	18.1	18.5	0.98x	12.3 to 25.8	2019-2023
Melanoma of the skin	New cases	18.2	23.8	0.76x	12.4 to 25.8	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 Iberville Parish
Measure	County	U.S. median	Difference	Unit
Premature death	13,473.2	9,842.6	+37%	years of life lost before age 75 per 100,000
Life expectancy	71.9	75.3	-4%	years
Child mortality	83.1	59.8	+39%	deaths under age 18 per 100,000
Infant mortality	9.2	6.2	+48%	deaths under age 1 per 1,000 live births
Injury deaths	106.6	96.9	+10%	deaths per 100,000
Drug overdose deaths	50.3	28.6	+76%	deaths per 100,000

Air toxics and air quality

EPA AirToxScreen 2020

Lifetime cancer risk from outdoor air toxics: 50 in a million. EPA treats 100 in a million as the upper end of acceptable risk and 1 in a million as the goal.

Formaldehyde24.73 per million
Ethylene Oxide14.37 per million
Carbon Tetrachloride2.99 per million
Acetaldehyde2.15 per million

EPA Air Quality Index 2025

Monitored on 365 days: 287 good, 1 unhealthy for sensitive groups or worse. Median AQI 40, peak 105.

Regulated facilities, sites and hazards by type

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

Industrial wastewater discharge348
NPDES wastewater discharge permit160
Air permit holder (minor source)97
Rail grade crossing81
Large hazardous waste generator39
Toxic chemical release facility (TRI)29
Small hazardous waste generator26
TRI reporting facility23
Major air pollution source21
Hazardous waste transporter16
Large greenhouse gas emitter12
Gas station (mapped facility)11
Gas power plant4
EPA air quality monitor3
Heliport3
Wastewater plant (mapped facility)3
Auto repair or body shop (mapped facility)2
Correctional facility (prison or jail)2
Public airport1
Brownfield property1
Landfill (mapped facility)1
Other 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.

Shintech Plaquemine Plant, Plaquemine
TRI reporting facility. Penalties $488,705.
EPA FRS registry ID 110000572675 (U.S. EPA ECHO) Agency record
Severity 10
The Dow Chemical Co - Louisiana Operations, Plaquemine
TRI reporting facility. Penalties $1,138,150.
EPA FRS registry ID 110001244724 (U.S. EPA ECHO) Agency record
Severity 10
Flopam Inc, Plaquemine
Toxic chemical release facility (TRI). Chemicals: Ammonia, Acrylic acid, Acrylamide, Acrylonitrile and 2 more. Reports carcinogens. 17,619,072 lbs released over 5 years.
TRI facility ID 7076WFLPMN2679H (U.S. EPA Toxics Release Inventory)
Severity 10
The Dow Chemical Co - Louisiana Operations, Plaquemine
Toxic chemical release facility (TRI). Chemicals: Ammonia, Ethylene, Asbestos (friable), Propylene and 4 more. Reports carcinogens. 10,793,018 lbs released over 5 years.
TRI facility ID 70765THDWCHIGHW (U.S. EPA Toxics Release Inventory)
Severity 9.9
Pcs Nitrogen Fertilizer Lp, Geismar
Toxic chemical release facility (TRI). Chemicals: Ammonia, Nitrate compounds (water dissociable; reportable only when in aqueous solution), Nitric acid, Methanol and 4 more. Reports carcinogens. 6,371,744 lbs released over 5 years.
TRI facility ID 70734RCDNCHIGHW (U.S. EPA Toxics Release Inventory)
Severity 9.7
Syngenta Crop Protection Llc Saint Gabriel Facility, Saint Gabriel
Toxic chemical release facility (TRI). Chemicals: Nitrate compounds (water dissociable; reportable only when in aqueous solution), Toluene, Atrazine, Ammonia and 4 more. Reports carcinogens. 5,916,774 lbs released over 5 years.
TRI facility ID 70776CBGGYRIVER (U.S. EPA Toxics Release Inventory)
Severity 9.7
Westlake Chemicals & Vinyls Llc - Plaquemine Facility, Plaquemine
TRI reporting facility.
EPA FRS registry ID 110000613747 (U.S. EPA ECHO) Agency record
Severity 9.6
Taminco Us Llc, Saint Gabriel
Toxic chemical release facility (TRI). Chemicals: Nitrate compounds (water dissociable; reportable only when in aqueous solution), Triethylamine, Ammonia, Ethylene glycol and 4 more. Reports carcinogens. 2,948,202 lbs released over 5 years.
TRI facility ID 70776RPRDCHIGHW (U.S. EPA Toxics Release Inventory)
Severity 9.5
Shintech Plaquemine Plant, Plaquemine
Toxic chemical release facility (TRI). Chemicals: Ammonia, Chlorine, Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size), n-Hexane and 4 more. Reports carcinogens. 1,858,606 lbs released over 5 years.
TRI facility ID 70764LLMNXHWY40 (U.S. EPA Toxics Release Inventory)
Severity 9.3
Tsrc Specialty Materials Llc, Plaquemine
Toxic chemical release facility (TRI). Chemicals: Cyclohexane, Isoprene, Styrene, 1,3-Butadiene and 1 more. Reports carcinogens. 1,774,283 lbs released over 5 years.
TRI facility ID 7076WDXCPL21255 (U.S. EPA Toxics Release Inventory)
Severity 9.3
Westlake Chemicals & Vinyls Llc, Plaquemine
Toxic chemical release facility (TRI). Chemicals: Nitrate compounds (water dissociable; reportable only when in aqueous solution), Chlorodifluoromethane (HCFC-22), Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size), Dichlorodifluoromethane (CFC-12) and 4 more. Reports carcinogens. 1,768,681 lbs released over 5 years.
TRI facility ID 70765GRGGLHIGHW (U.S. EPA Toxics Release Inventory)
Severity 9.3
Cos-Mar Co, Carville
Toxic chemical release facility (TRI). Chemicals: Styrene, Ethylbenzene, Benzene, Toluene and 4 more. Reports carcinogens. 858,399 lbs released over 5 years.
TRI facility ID 70721CSMRPLAHWY (U.S. EPA Toxics Release Inventory)
Severity 9.1
Nova Chemicals Olefins Llc, Geismar
Toxic chemical release facility (TRI). Chemicals: Ethylene, Propylene, Benzene, Ammonia and 4 more. Reports carcinogens. 737,782 lbs released over 5 years.
TRI facility ID 70734NNTXSLAHWY (U.S. EPA Toxics Release Inventory)
Severity 9
Delta St. Gabriel, St. Gabriel
TRI reporting facility. Penalties $30,000.
EPA FRS registry ID 110000743401 (U.S. EPA ECHO) Agency record
Severity 8.9
Honeywell International Inc Geismar Plant, Carville
Toxic chemical release facility (TRI). Chemicals: 2-Chloro-1,1,1,2-tetrafluoroethane (HCFC-124), Hydrogen fluoride, Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size), Arsenic and 4 more. Reports carcinogens. 534,077 lbs released over 5 years.
TRI facility ID 70734LLDSGHWY31 (U.S. EPA Toxics Release Inventory)
Severity 8.9
Syngenta Crop Protection, Llc. - St Gabriel Plant, Saint Gabriel
TRI reporting facility. Penalties $405,101.
EPA FRS registry ID 110000597426 (U.S. EPA ECHO) Agency record
Severity 8.8
Blue Cube Operations Llc - Plaquemine Site, Plaquemine
Toxic chemical release facility (TRI). Chemicals: 1,2-Dichloroethane, Chloroform, Tetrachloroethylene, Chlorodifluoromethane (HCFC-22) and 4 more. Reports carcinogens. 220,372 lbs released over 5 years.
TRI facility ID 7076WBLCBP21255 (U.S. EPA Toxics Release Inventory)
Severity 8.6
Flopam Inc - Flopam Facility, Plaquemine
TRI reporting facility. Penalties $21,400.
EPA FRS registry ID 110041935779 (U.S. EPA ECHO) Agency record
Severity 8.5
Brenntag Southwest St Gabriel 9-07, St. Gabriel
TRI reporting facility. Penalties $19,800.
EPA FRS registry ID 110000597435 (U.S. EPA ECHO) Agency record
Severity 8.5
Totalenergies Petrochemicals & Refining Usa Inc Carville Pol, Carville
Toxic chemical release facility (TRI). Chemicals: Styrene, Ethylbenzene, Toluene, Zinc compounds and 2 more. Reports carcinogens. 125,029 lbs released over 5 years.
TRI facility ID 70721FNLCHLAHWY (U.S. EPA Toxics Release Inventory)
Severity 8.4
Blue Cube Operations Llc - Plaquemine Site, Plaquemine
TRI reporting facility. Penalties $12,650.
EPA FRS registry ID 110072259128 (U.S. EPA ECHO) Agency record
Severity 8.3
Ineos Oxide A Div Of Ineos Americas Llc, Plaquemine
Toxic chemical release facility (TRI). Chemicals: Ethylene, Methanol, Certain glycol ethers, Ammonia and 4 more. Reports carcinogens. 80,283 lbs released over 5 years.
TRI facility ID 70765NSXDX21255 (U.S. EPA Toxics Release Inventory)
Severity 8.3
Plaquemine Methocel, Plaquemine
Toxic chemical release facility (TRI). Chemicals: Methanol, Chloromethane, Propylene oxide, Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size) and 2 more. Reports carcinogens. 70,116 lbs released over 5 years.
TRI facility ID 7076WDDPSP21255 (U.S. EPA Toxics Release Inventory)
Severity 8.2
Tsrc Specialty Materials Llc - Research & Development Pilot Plant, Plaquemine
TRI reporting facility. Penalties $23,500.
EPA FRS registry ID 110046122735 (U.S. EPA ECHO) Agency record
Severity 8.1
Se Tylose Louisiana Llc, Plaquemine
Toxic chemical release facility (TRI). Chemicals: tert-Butyl alcohol, Nitric acid, Ethylene oxide. Reports carcinogens. 29,649 lbs released over 5 years.
TRI facility ID 7076WSTYLS2627H (U.S. EPA Toxics Release Inventory)
Severity 7.9

Correctional facilities

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

La Dept. Of Public Safety & Corrections- Elayn Hunt Correctional Center, Saint Gabriel
EPA FRS registry ID
110006023365
Wastewater permit
Yes, 8 quarters in noncompliance
EPA detailed facility report
La Correct Instit Women Prison Enter, St Gabriel
EPA FRS registry ID
110006027780
Wastewater permit
None on record
EPA detailed facility report

Discovery / public records

Records to request for Iberville Parish

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