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

Matthiessen And Hegeler Zinc Company

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

Parts Of Sect. 10, 11, 14 & 15, T33N-R1E, LaSalle, Illinois · ZIP 61301 · EPA ID IL0000064782

See La Salle 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
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)Soil3
CadmiumSoil3
LeadHealth riskNeurotoxin. Even low childhood exposure impairs cognitive development; chronic adult exposure damages kidneys and the cardiovascular system. (EPA, ATSDR)Soil3
ManganeseHealth riskExcess inhalation can cause manganism, a Parkinson-like neurological disorder. (ATSDR)Soil3
ZincHealth riskGenerally low acute toxicity. Chronic high-dose exposure disrupts copper absorption and immune function. (ATSDR)Soil3
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)Soil2
Aroclor 1260Health 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)Soil2
Benzo(B)FluorantheneSoil2
Benzo[A]AnthraceneHealth riskPAH; IARC Group 2B possible carcinogen; common combustion byproduct and creosote constituent. (IARC)Soil2
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)Soil2
Chromium(Vi)Health riskHexavalent chromium (Cr-VI) is an IARC Group 1 carcinogen via inhalation, causing lung cancer; trivalent chromium is far less toxic. (IARC, EPA)Soil2
CobaltSoil2
CopperHealth riskInhaled copper fumes cause metal-fume fever; chronic ingestion above EPA's 1.3 mg/L action level damages the liver. (EPA)Soil2
Dibenzo(A,H)AnthraceneSoil2
Indeno(1,2,3-Cd)PyreneSoil2
MercuryHealth riskNeurotoxin. Methylmercury bioaccumulates up the food chain and damages the developing nervous system. (EPA, ATSDR)Soil2
MetalsGroundwater2
Semi-Volatile Organic Compounds (Svoc)Groundwater2
VocGroundwater2
AluminumHealth riskInhaled aluminum fumes can cause lung scarring (aluminosis); high cumulative exposure has been linked to neurological effects. (NIOSH)Soil1
Aroclor 1248Health 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
Aroclor 1254Health 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
AsbestosHealth riskIARC Group 1 carcinogen. Causes mesothelioma, lung cancer, and asbestosis. (IARC, EPA)Soil1
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)Soil1
Benzo(K)FluorantheneSoil1
CyanideHealth riskAcutely lethal at high doses by blocking cellular respiration; chronic low-dose exposure damages the thyroid and nervous system. (EPA, ATSDR)Soil1
HexachlorobenzeneSoil1
IronSoil1
ThalliumSoil1
TrichloroetheneHealth riskTCE. IARC Group 1 carcinogen — kidney cancer; suspected liver cancer and non-Hodgkin lymphoma. EPA MCL 5 µg/L; common DNAPL groundwater plume contaminant. (IARC, EPA, ATSDR)Soil1

Showing the top 30 pairs by SEMS citation count. 1 additional (contaminant, pathway) pairs are recorded for this site.

Drinking-water linkage · SDWIS

Groundwater Systems Serving Communities Within 3 Miles

The 17 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
Buda MunicipalPeru2.6 mi482GROUNDWATERUNRESOLVED
Bureau Junction MunicipalPeru2.6 mi297GROUNDWATERUNRESOLVED
Cherry MunicipalPeru2.6 mi490GROUNDWATERIn compliance
Dalzell MunicipalPeru2.6 mi663GROUNDWATERUNRESOLVED
Manlius MunicipalPeru2.6 mi298GROUNDWATERUNRESOLVED
Thomson MunicipalPeru2.6 mi580GROUNDWATERUNRESOLVED
Annawan MunicipalPeru2.6 mi843GROUNDWATERIn compliance
Atkinson MunicipalPeru2.6 mi955GROUNDWATERUNRESOLVED
Hillcrest Home MunicipalPeru2.6 mi103GROUNDWATERUNRESOLVED
Reddick MunicipalPeru2.6 mi196GROUNDWATERUNRESOLVED
Pauls Mhp PrivatePeru2.6 mi38GROUNDWATERUNRESOLVED
Peru MunicipalPeru2.6 mi10,300GROUNDWATERUNRESOLVED
Lynnwood Water Corporation PrivatePeru2.6 mi100GROUNDWATERIn compliance
Varna MunicipalPeru2.6 mi342GROUNDWATERUNRESOLVED
Magnolia MunicipalPeru2.6 mi244GROUNDWATERIn compliance
Lake Thunderbird Subdivsion PrivatePeru2.6 mi450GROUNDWATERUNRESOLVED
Paradise Manor Mhp PrivatePeru2.6 mi200GROUNDWATERUNRESOLVED

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 5,291. Why we surface this →

POPULATION SHARE
42.4%

Low-income

POPULATION SHARE
31.9%

People of color

POPULATION SHARE
6.8%

Under age 5

POPULATION SHARE
19.8%

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.