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

American Creosote Works, Inc. (Winnfield Plant)

This site is currently on the EPA Superfund National Priorities List and remains under federal cleanup oversight. Most-cited contaminant of concern: 1,2-Dihydroacenaphthylene.

1006 Front Street, Winnfield, Louisiana · ZIP 71483 · EPA ID LAD000239814

See Winn 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
1,2-DihydroacenaphthyleneGroundwater2
BenzeneHealth riskIARC Group 1 carcinogen. Long-term inhalation causes leukemia and bone-marrow disorders. (IARC, EPA)Groundwater2
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)Groundwater2
EthylbenzeneHealth riskIARC Group 2B possible carcinogen; eye and respiratory irritant. (IARC)Groundwater2
FluorantheneGroundwater2
NaphthaleneHealth riskIARC Group 2B possible carcinogen; causes hemolytic anemia, especially in infants. (IARC)Groundwater2
PentachlorophenolHealth riskIARC Group 1 carcinogen; wood preservative; persistent in soil and groundwater. (IARC, EPA)Soil2
PyreneGroundwater2
Xylene (Mixed Isomers)Health riskEye, skin, and respiratory irritant; central-nervous-system effects from chronic exposure. (EPA)Groundwater2
1,1'-BiphenylGroundwater1
1,1'-BiphenylSoil1
1-MethylnaphthaleneGroundwater1
2,3,7,8-Tetrachlorodibenzo-P-Dioxin (Tcdd)Soil1
2,3,7,8-Tetrachlorodibenzo-P-Dioxin (Tcdd) Toxicity Equivalents (Teq)Soil1
2-MethylnaphthaleneGroundwater1
2-MethylnaphthaleneSoil1
3-Methylphenol (M-Cresol)Groundwater1
4-Methylphenol (P-Cresol)Groundwater1
9H-FluoreneGroundwater1
AcenaphthyleneGroundwater1
AnthraceneGroundwater1
Benzo[A]AnthraceneHealth riskPAH; IARC Group 2B possible carcinogen; common combustion byproduct and creosote constituent. (IARC)Groundwater1
Benzo[A]Pyrene Equivalents (Bapeq)Health riskPAH; IARC Group 1 carcinogen; the prototypical PAH used to benchmark PAH-mixture cancer risk. EPA MCL 0.2 µg/L. (IARC, EPA)Groundwater1
Benzo[A]Pyrene Equivalents (Bapeq)Health riskPAH; IARC Group 1 carcinogen; the prototypical PAH used to benchmark PAH-mixture cancer risk. EPA MCL 0.2 µg/L. (IARC, EPA)Soil1
ChryseneGroundwater1
Dibenzo(A,H)AnthraceneGroundwater1
DibenzofuranGroundwater1
NaphthaleneHealth riskIARC Group 2B possible carcinogen; causes hemolytic anemia, especially in infants. (IARC)Soil1
PentachlorophenolHealth riskIARC Group 1 carcinogen; wood preservative; persistent in soil and groundwater. (IARC, EPA)Groundwater1
PentachlorophenolHealth riskIARC Group 1 carcinogen; wood preservative; persistent in soil and groundwater. (IARC, EPA)Sludge1

Showing the top 30 pairs by SEMS citation count. 4 additional (contaminant, pathway) pairs are recorded for this site.

Drinking-water linkage · SDWIS

Groundwater Systems Serving Communities Within 3 Miles

The 4 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
Atlanta Water Supply PrivateWinnfield0.6 mi900GROUNDWATER14 HEALTH-BASED · 5YR
West Winn Water System Inc PrivateWinnfield0.6 mi2,064GROUNDWATERUNRESOLVED
City Of Winnfield Water System MunicipalWinnfield0.6 mi7,194GROUNDWATERUNRESOLVED
Tannehill Water System PrivateWinnfield0.6 mi1,932GROUNDWATERUNRESOLVED

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 (2 Census block groups, population-weighted demographics): a population of 964. Why we surface this →

POPULATION SHARE
67.9%

Low-income

POPULATION SHARE
78.8%

People of color

POPULATION SHARE
3.0%

Under age 5

POPULATION SHARE
7.3%

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.