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St. John the Baptist Parish, Louisiana: environmental and disease records

Cancer mortality in St. John the Baptist Parish is 169.9 deaths per 100,000 people per year against a U.S. rate of 143.2, a statistically significant excess. The strongest disease signals are Lung & bronchus deaths at 1.3 times the U.S. rate. Federal databases place 532 regulated facilities, sites and hazards inside the county, led by Industrial wastewater discharge (183), NPDES wastewater discharge permit (105), Rail grade crossing (98). EPA AirToxScreen estimates a lifetime cancer risk from outdoor air toxics of 80 in a million, driven mainly by ethylene oxide.

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: 30.0886, -90.5341.

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 St. John the Baptist Parish compared with the United States
Cancer	Measure	County rate	U.S. rate	Times U.S.	95% interval	Years
Liver & bile duct	New cases	13.5	8.7	1.55xSignificant	9.2 to 19.1	2019-2023
Pancreas	Deaths	15.7	11.3	1.39x	10.9 to 21.9	2020-2024
Stomach	New cases	9	6.6	1.36x	5.3 to 14.3	2019-2023
Lung & bronchus	Deaths	40.2	30.2	1.33xSignificant	32.3 to 49.5	2020-2024
Kidney & renal pelvis	New cases	23.3	17.9	1.3x	17.6 to 30.5	2019-2023
Liver & bile duct	Deaths	8.5	6.6	1.29x	5.2 to 13.4	2020-2024
Non-Hodgkin lymphoma	New cases	23.5	18.5	1.27x	17.5 to 31	2019-2023
All cancer	Deaths	169.9	143.2	1.19xSignificant	152.8 to 188.6	2020-2024
Pancreas	New cases	16.2	13.9	1.17x	11.5 to 22.4	2019-2023
All cancer	New cases	486.6	453.4	1.07xSignificant	458.4 to 516.2	2019-2023
Lung & bronchus	New cases	53	51.8	1.02x	44.1 to 63.2	2019-2023
Bladder	New cases	17	18.7	0.91x	11.9 to 23.5	2019-2023
Leukemia	New cases	12.8	14.5	0.88x	8.3 to 18.9	2019-2023
Thyroid	New cases	11.4	13	0.88x	7.4 to 16.9	2019-2023
Melanoma of the skin	New cases	9.6	23.8	0.4x	5.8 to 14.9	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 St. John the Baptist Parish
Measure	County	U.S. median	Difference	Unit
Premature death	11,024.3	9,842.6	+12%	years of life lost before age 75 per 100,000
Life expectancy	73.6	75.3	-2%	years
Child mortality	65.3	59.8	+9%	deaths under age 18 per 100,000
Infant mortality	8.3	6.2	+34%	deaths under age 1 per 1,000 live births
Injury deaths	97.9	96.9	+1%	deaths per 100,000
Drug overdose deaths	31.3	28.6	+10%	deaths per 100,000

Air toxics and air quality

EPA AirToxScreen 2020

Lifetime cancer risk from outdoor air toxics: 80 in a million. EPA treats 100 in a million as the upper end of acceptable risk and 1 in a million as the goal.

Ethylene Oxide26.92 per million
Formaldehyde22.78 per million
Chloroprene20.22 per million
Carbon Tetrachloride2.92 per million

EPA Air Quality Index 2025

Monitored on 364 days: 339 good, 0 unhealthy for sensitive groups or worse. Median AQI 34, peak 87.

Regulated facilities, sites and hazards by type

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

Industrial wastewater discharge183
NPDES wastewater discharge permit105
Rail grade crossing98
Air permit holder (minor source)36
Small hazardous waste generator24
Gas station (mapped facility)16
Large hazardous waste generator13
Toxic chemical release facility (TRI)13
TRI reporting facility11
Hazardous waste transporter10
Major air pollution source7
Brownfield property6
Large greenhouse gas emitter5
EPA air quality monitor2
Commercial airport1
Auto repair or body shop (mapped facility)1
Heliport1

Highest-severity records

The 25 records with the highest Envyrofax severity in the county, with the agency identifier to cite in a records request.

Denka Performance Elastomer Llc, Laplace
TRI reporting facility. Penalties $996,703.
EPA FRS registry ID 110067396669 (U.S. EPA ECHO) Agency record
Severity 10
Marathon Petroleum Co Lp, Garyville
Toxic chemical release facility (TRI). Chemicals: Nitrate compounds (water dissociable; reportable only when in aqueous solution), Hydrogen cyanide, Ammonia, Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size) and 4 more. Reports carcinogens. Reports PFAS. 3,621,500 lbs released over 5 years.
TRI facility ID 70051MRTHNHWY61 (U.S. EPA Toxics Release Inventory)
Severity 10
Evonik Stockhausen Llc, Garyville
TRI reporting facility. Penalties $282,740.
EPA FRS registry ID 110000597088 (U.S. EPA ECHO) Agency record
Severity 9.7
Dupont Pontchartrain Works, La Place
Toxic chemical release facility (TRI). Chemicals: Nitrate compounds (water dissociable; reportable only when in aqueous solution), Ammonia, Aniline, Creosote and 4 more. Reports carcinogens. 5,191,799 lbs released over 5 years.
TRI facility ID 70069DPNTPHIGHW (U.S. EPA Toxics Release Inventory)
Severity 9.7
Denka Performance Elastomer Llc, La Place
Toxic chemical release facility (TRI). Chemicals: Chloroprene, Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size), Toluene, 1,4-Dichloro-2-butene and 4 more. Reports carcinogens. 395,141 lbs released over 5 years.
TRI facility ID 7006WDNKPR56HIG (U.S. EPA Toxics Release Inventory)
Severity 8.8
Marathon Petroleum Co Lp - Louisiana Refining Division - Garyville Refinery, Garyville
TRI reporting facility.
EPA FRS registry ID 110041135580 (U.S. EPA ECHO) Agency record
Severity 8.5
Dupont Pontchartrain Site, La Place
TRI reporting facility. Penalties $480,000.
EPA FRS registry ID 110000597131 (U.S. EPA ECHO) Agency record
Severity 8.3
Air Products & Chemicals Inc - Garyville Smr, Garyville
Toxic chemical release facility (TRI). Chemicals: Ammonia, Methanol, Nickel compounds, Nickel And Nickel Compounds and 1 more. Reports carcinogens. 80,489 lbs released over 5 years.
TRI facility ID 7005WRPRDC4663W (U.S. EPA Toxics Release Inventory)
Severity 8.3
Atlantic Alumina Gramercy Operations, Gramercy
Toxic chemical release facility (TRI). Chemicals: Zinc compounds, Lead compounds, Lead And Lead Compounds, Mercury and 1 more. 5,226,412 lbs released over 5 years.
TRI facility ID 70052KSRLMAIRLI (U.S. EPA Toxics Release Inventory)
Severity 8.2
Mt. Airy Terminal Llc, Mount Airy
Toxic chemical release facility (TRI). Chemicals: Xylene (mixed isomers), Toluene, n-Hexane, Benzene and 4 more. Reports carcinogens. 42,069 lbs released over 5 years.
TRI facility ID 7007WPNKTR46HIG (U.S. EPA Toxics Release Inventory)
Severity 8
Pinnacle Polymers, Garyville
TRI reporting facility. Penalties $26,500.
EPA FRS registry ID 110000547953 (U.S. EPA ECHO) Agency record
Severity 8
Evonik Corp, Reserve
Toxic chemical release facility (TRI). Chemicals: Methyl isobutyl ketone, Ethylene oxide, Propylene oxide, Certain glycol ethers and 1 more. Reports carcinogens. 36,505 lbs released over 5 years.
TRI facility ID 70084LCLCX430NO (U.S. EPA Toxics Release Inventory)
Severity 8
Clariant Corporation - Reserve Site, Reserve
Toxic chemical release facility (TRI). Chemicals: Methanol, Toluene, Xylene (mixed isomers), Methyl isobutyl ketone and 4 more. Reports carcinogens. 28,274 lbs released over 5 years.
TRI facility ID 70084BTZLB500RO (U.S. EPA Toxics Release Inventory)
Severity 7.9
Nalco Co, Garyville
Toxic chemical release facility (TRI). Chemicals: Allyl chloride, Nitrate compounds (water dissociable; reportable only when in aqueous solution), Acrylonitrile, Ammonia and 4 more. Reports carcinogens. 10,492 lbs released over 5 years.
TRI facility ID 70051NLCCHRIVER (U.S. EPA Toxics Release Inventory)
Severity 7.6
Denka Performance Elastomer Llc, Laplace
Major air pollution source. Penalties $996,703.
EPA FRS registry ID 110067396669 (U.S. EPA ECHO) Agency record
Severity 7.5
Pinnacle Polymers, Garyville
Toxic chemical release facility (TRI). Chemicals: Propylene, Ethylene. 486,668 lbs released over 5 years.
TRI facility ID 70051PSLNP1EPSI (U.S. EPA Toxics Release Inventory)
Severity 7.4
Denka Performance Elastomer Llc, Laplace
Large hazardous waste generator. Penalties $996,703.
EPA FRS registry ID 110067396669 (U.S. EPA ECHO) Agency record
Severity 7
Denka Performance Elastomer Llc, Laplace
NPDES wastewater discharge permit. Penalties $996,703.
EPA FRS registry ID 110067396669 (U.S. EPA ECHO) Agency record
Severity 7
Nalco Production Llc - Garyville Facility, Garyville
TRI reporting facility.
EPA FRS registry ID 110007015871 (U.S. EPA ECHO) Agency record
Severity 6.8
Championx -- Garyville Facility, Mount Airy
Toxic chemical release facility (TRI). Chemicals: Acrylamide, Acrylic acid, Ammonia, Ethylene glycol and 1 more. Reports carcinogens. 542 lbs released over 5 years.
TRI facility ID 7007WCHMPN365HI (U.S. EPA Toxics Release Inventory)
Severity 6.6
Evonik Stockhausen Llc, Garyville
Large greenhouse gas emitter. Penalties $282,740.
EPA FRS registry ID 110000597088 (U.S. EPA ECHO) Agency record
Severity 6.5
Stockhausen Superabsorber Llc, Garyville
Toxic chemical release facility (TRI). Chemicals: Acrylic acid. 29,308 lbs released over 5 years.
TRI facility ID 70051STCKH3606H (U.S. EPA Toxics Release Inventory)
Severity 6.4
Air Products & Chemicals Inc, Garyville
TRI reporting facility. Penalties $27,000.
EPA FRS registry ID 110033135328 (U.S. EPA ECHO) Agency record
Severity 6
Clariant Corporation - Reserve, Reserve
TRI reporting facility.
EPA FRS registry ID 110000448873 (U.S. EPA ECHO) Agency record
Severity 5.9
Mt. Airy Terminal, Mount Airy
TRI reporting facility.
EPA FRS registry ID 110070514868 (U.S. EPA ECHO) Agency record
Severity 5.8

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 St. John the Baptist 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 St. John the Baptist 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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