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

Gulf State Utilities-North Ryan Street

This site has been proposed for inclusion on the EPA Superfund National Priorities List but has not yet been finalized. Most-cited contaminant of concern: 1,2,4-Trimethylbenzene.

303 North Ryan Street, Lake Charles, Louisiana · ZIP 70601 · EPA ID LAD985169317

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
1,2,4-TrimethylbenzeneHealth riskEye, skin, and respiratory irritant; high exposure causes nervous-system effects. (ATSDR)Groundwater1
1,2-DihydroacenaphthyleneGroundwater1
1,3,5-TrimethylbenzeneGroundwater1
4-Methylphenol (P-Cresol)Surface Water1
9H-FluoreneGroundwater1
AcenaphthyleneGroundwater1
AcetoneHealth riskLow chronic toxicity; high acute exposure causes CNS depression and respiratory irritation. (EPA, NIOSH)Groundwater1
AldrinHealth riskMetabolizes to dieldrin in the body. EPA classifies as 'probable human carcinogen'; banned in the US in 1987. (EPA, ATSDR)Surface Water1
Alpha-ChlordaneHealth riskIARC Group 2B possible carcinogen; neurotoxin; banned for most uses in 1988 but residues persist. (IARC, EPA)Surface Water1
AluminumHealth riskInhaled aluminum fumes can cause lung scarring (aluminosis); high cumulative exposure has been linked to neurological effects. (NIOSH)Groundwater1
AluminumHealth riskInhaled aluminum fumes can cause lung scarring (aluminosis); high cumulative exposure has been linked to neurological effects. (NIOSH)Surface Water1
AnthraceneGroundwater1
AnthraceneSurface Water1
AntimonyHealth riskInhaled antimony trioxide is an IARC Group 2B possible carcinogen; respiratory and cardiovascular effects from long-term exposure. EPA MCL 6 µg/L. (IARC, EPA)Groundwater1
AntimonyHealth riskInhaled antimony trioxide is an IARC Group 2B possible carcinogen; respiratory and cardiovascular effects from long-term exposure. EPA MCL 6 µg/L. (IARC, EPA)Surface Water1
Aroclor 1242Health riskPCBs. IARC Group 1 carcinogen; immune, reproductive, and neurological effects; bioaccumulate in fish and breast milk. Banned in 1979; persist as legacy contamination. (IARC, EPA)Soil1
ArsenicHealth riskIARC Group 1 carcinogen via inhalation and ingestion. EPA MCL 10 µg/L; chronic exposure causes skin, lung, bladder cancer and cardiovascular disease. (IARC, EPA, ATSDR)Groundwater1
ArsenicHealth riskIARC Group 1 carcinogen via inhalation and ingestion. EPA MCL 10 µg/L; chronic exposure causes skin, lung, bladder cancer and cardiovascular disease. (IARC, EPA, ATSDR)Surface Water1
BariumHealth riskSoluble barium compounds are toxic if ingested, affecting the heart, kidneys, and nervous system. Insoluble forms (e.g. barium sulfate) are far less toxic. (EPA)Groundwater1
BariumHealth riskSoluble barium compounds are toxic if ingested, affecting the heart, kidneys, and nervous system. Insoluble forms (e.g. barium sulfate) are far less toxic. (EPA)Surface Water1
BenzeneHealth riskIARC Group 1 carcinogen. Long-term inhalation causes leukemia and bone-marrow disorders. (IARC, EPA)Groundwater1
BenzeneHealth riskIARC Group 1 carcinogen. Long-term inhalation causes leukemia and bone-marrow disorders. (IARC, EPA)Soil1
Benzo(B)FluorantheneSurface Water1
Benzo(Ghi)PeryleneSurface Water1
Benzo[A]AnthraceneHealth riskPAH; IARC Group 2B possible carcinogen; common combustion byproduct and creosote constituent. (IARC)Surface Water1
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)Surface Water1
BerylliumGroundwater1
BerylliumSurface Water1
BromodichloromethaneSurface Water1

Showing the top 30 pairs by SEMS citation count. 52 additional (contaminant, pathway) pairs are recorded for this site.

Drinking-water linkage · SDWIS

Groundwater Systems Serving Communities Within 3 Miles

The 18 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
Garden Heights Water System PrivateLake Charles2.8 mi465GROUNDWATERIn compliance
City Of Lake Charles Water System MunicipalLake Charles2.8 mi79,500GROUNDWATERIn compliance
Calcasieu Parish Ww District No 1 MunicipalLake Charles2.8 mi20,837GROUNDWATERIn compliance
C K B Trailer Park Water System PrivateLake Charles2.8 mi150GROUNDWATERUNRESOLVED
Oak Meadows Subdivision Water System PrivateLake Charles2.8 mi318GROUNDWATERIn compliance
East Park Subdivision Water System PrivateLake Charles2.8 mi102GROUNDWATERIn compliance
Calcasieu Parish Ww District No 5 MunicipalLake Charles2.8 mi5,388GROUNDWATERIn compliance
Country Living Trailer Park Water System PrivateLake Charles2.8 mi51GROUNDWATERIn compliance
Quail Ridge Estates Water System PrivateLake Charles2.8 mi1,119GROUNDWATERIn compliance
Oak Pine Mobile Home Park Water System PrivateLake Charles2.8 mi240GROUNDWATERUNRESOLVED
Calcasieu Parish Ww District 8 MunicipalLake Charles2.8 mi6,834GROUNDWATERIn compliance
Clearview Mobile Home Park PrivateLake Charles2.8 mi141GROUNDWATERUNRESOLVED
Gulf Stream Manor Water System PrivateLake Charles2.8 mi2,130GROUNDWATERUNRESOLVED
Corbina Trailer Park Water System PrivateLake Charles2.8 mi69GROUNDWATERIn compliance
Calcasieu Parish Ww 12 Ward 3 MunicipalLake Charles2.8 mi2,130GROUNDWATERIn compliance
K & P Mh & Rv Park Water System PrivateLake Charles2.8 mi66GROUNDWATERIn compliance
Calcasieu Parish Ww District No 4 MunicipalWestlake3.0 mi5,340GROUNDWATERUNRESOLVED
Westlake City Of Water System MunicipalWestlake3.0 mi4,858GROUNDWATERUNRESOLVED

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 1,328. Why we surface this →

POPULATION SHARE
70.9%

Low-income

POPULATION SHARE
65.1%

People of color

POPULATION SHARE
5.9%

Under age 5

POPULATION SHARE
16.4%

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 containing-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.