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Superfund / NPL site · EPA Superfund SEMS through latest publishNPL Final

Bayou Bonfouca

This site is currently on the EPA Superfund National Priorities List and remains under federal cleanup oversight. Most-cited contaminant of concern: Polycyclic Aromatic Hydrocarbons (Pahs).

Bayou Bonfouca, Slidell, Louisiana · ZIP 70458 · EPA ID LAD980745632

See St. Tammany ContaminantsEquity contextHow we read Superfund data
CLEANUP TIMELINE

Listing-date and cleanup-phase enrichment from EPA's per-site SEMS profile is queued for a follow-up ingest pass. Until then, this section will populate from EPA's published timeline data.

Anomaly engine

Notable Signals

No notable signals at this Superfund site for the current ingest. Cleanup-phase and SEMS-action flags are deferred to a follow-up engineering pass.

Contaminants of concern · per EPA SEMS

What's In This Site

Each row pairs a contaminant with the medium it was found in (the exposure pathway). Hover any named contaminant for an agency-cited health-risk summary. Cited count = number of SEMS decision records (RODs and related) that name the pair.

ContaminantPathwayCited
Polycyclic Aromatic Hydrocarbons (Pahs)Health riskPAH class includes IARC Group 1 carcinogens (e.g., benzo[a]pyrene); long-term exposure raises cancer risk. (IARC, EPA)Soil2
1,2-DihydroacenaphthyleneSolid Waste1
2-Butanone (Methyl Ethyl Ketone)Solid Waste1
2-MethylnaphthaleneSolid Waste1
9H-FluoreneSolid Waste1
AnthraceneSolid Waste1
BenzeneHealth riskIARC Group 1 carcinogen. Long-term inhalation causes leukemia and bone-marrow disorders. (IARC, EPA)Solid Waste1
Benzo(B)FluorantheneSolid Waste1
Benzo[A]AnthraceneHealth riskPAH; IARC Group 2B possible carcinogen; common combustion byproduct and creosote constituent. (IARC)Solid Waste1
Benzo[A]PyreneHealth riskPAH; IARC Group 1 carcinogen; the prototypical PAH used to benchmark PAH-mixture cancer risk. EPA MCL 0.2 µg/L. (IARC, EPA)Sludge1
Benzo[A]PyreneHealth riskPAH; IARC Group 1 carcinogen; the prototypical PAH used to benchmark PAH-mixture cancer risk. EPA MCL 0.2 µg/L. (IARC, EPA)Soil1
Benzo[A]PyreneHealth riskPAH; IARC Group 1 carcinogen; the prototypical PAH used to benchmark PAH-mixture cancer risk. EPA MCL 0.2 µg/L. (IARC, EPA)Solid Waste1
ChryseneSolid Waste1
DibenzofuranSolid Waste1
EthylbenzeneHealth riskIARC Group 2B possible carcinogen; eye and respiratory irritant. (IARC)Solid Waste1
FluorantheneSolid Waste1
NaphthaleneHealth riskIARC Group 2B possible carcinogen; causes hemolytic anemia, especially in infants. (IARC)Solid Waste1
PhenanthreneSolid Waste1
Polycyclic Aromatic Hydrocarbons (Pahs)Health riskPAH class includes IARC Group 1 carcinogens (e.g., benzo[a]pyrene); long-term exposure raises cancer risk. (IARC, EPA)Groundwater1
Polycyclic Aromatic Hydrocarbons (Pahs)Health riskPAH class includes IARC Group 1 carcinogens (e.g., benzo[a]pyrene); long-term exposure raises cancer risk. (IARC, EPA)Sediment1
Polycyclic Aromatic Hydrocarbons (Pahs)Health riskPAH class includes IARC Group 1 carcinogens (e.g., benzo[a]pyrene); long-term exposure raises cancer risk. (IARC, EPA)Sludge1
PyreneSolid Waste1
StyreneHealth riskIARC Group 2A probable carcinogen; central-nervous-system effects from inhalation. (IARC, EPA)Solid Waste1
TolueneHealth riskCentral-nervous-system depressant. Chronic high exposure causes hearing loss and developmental effects. (EPA, ATSDR)Solid Waste1
Tributyl(Chloro)StannaneSediment1
Xylene (Mixed Isomers)Health riskEye, skin, and respiratory irritant; central-nervous-system effects from chronic exposure. (EPA)Solid Waste1
Drinking-water linkage · SDWIS

Groundwater Systems Serving Communities Within 3 Miles

The 8 systems below draw on groundwater (or mixed sources) and serve communities whose centroid sits within 3 miles of this site. Distance is to the served-city centroid — SDWIS does not expose individual wellhead locations, so this is a proximity screen, not a wellhead-impact assessment.

Water systemServesDistancePopulation servedSourceStatus
Azalea Lane Trailer Park PrivateSlidell0.6 mi84GROUNDWATERUNRESOLVED
Bayou Liberty Water Association PrivateSlidell0.6 mi10,791GROUNDWATERIn compliance
Slidell Water Supply MunicipalSlidell0.6 mi35,547GROUNDWATERUNRESOLVED
Ozone Pine Subdivision PrivateSlidell0.6 mi75GROUNDWATERUNRESOLVED
Pine Crest Trailer Park PrivateSlidell0.6 mi600GROUNDWATERUNRESOLVED
Creek Place Apartments PrivateSlidell0.6 mi100GROUNDWATERUNRESOLVED
Indian Hills Trailer Park PrivateSlidell0.6 mi100GROUNDWATERUNRESOLVED
Timberland Mobile Home Park PrivateSlidell0.6 mi60GROUNDWATERUNRESOLVED

Methodology: served-city centroid (TIGER 2020) is used as the PWS coordinate. Source-water classification from SDWIS primary_source_code; only groundwater and mixed-source systems are queried. Click any system above for its full SDWIS profile.

Equity context · ACS 2018-2022 block-group demographics

Who Lives Near This Site

Within 1 mile of this site (5 Census block groups, population-weighted demographics): a population of 5,094. Why we surface this →

POPULATION SHARE
58.4%

Low-income

POPULATION SHARE
49.4%

People of color

POPULATION SHARE
5.1%

Under age 5

POPULATION SHARE
16.3%

Over age 64

Source: Census ACS 2018-2022 block-group demographics, population-weighted across the 1-mile buffer around this site (from USEPA-clone/EJAM-open blockgroupstats). NPL site proximity contributes to the national EJ pattern; indicator-level percentile and disparity scores are surfaced on the county page and the state page.

Source. EPA Superfund Enterprise Management System (SEMS) · retrieved 2026-05-07. SEMS is a federal public-domain dataset under 17 USC §105.

What this is not. We report EPA's published Superfund record — site listing, status, and contaminants of concern as named in EPA's decision documents. We do not perform site visits, independent air or water sampling, or current-state health-risk assessment. NPL listing reflects EPA's Hazard Ranking Score at a point in time; it does not by itself describe present-day exposure.