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

Reilly Tar & Chemical Corp. (St. Louis Park Plant)

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).

Louisiana & Walker Street, St. Louis Park, Minnesota · ZIP 55426 · EPA ID MND980609804

See Hennepin 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)Groundwater4
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)Groundwater1
Carcinogenic Polycyclic Aromatic Hydrocarbons (Cpah)Health riskPAH class includes IARC Group 1 carcinogens (e.g., benzo[a]pyrene); long-term exposure raises cancer risk. (IARC, EPA)Groundwater1
CreosoteHealth riskCoal-tar creosote is an IARC Group 2A probable carcinogen; PAH-rich preservative used in railroad ties and utility poles. (IARC, EPA)Groundwater1
CreosoteHealth riskCoal-tar creosote is an IARC Group 2A probable carcinogen; PAH-rich preservative used in railroad ties and utility poles. (IARC, EPA)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)Soil1
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)Soil1
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
Rockwood Estates PrivateSt. Louis Park0.6 mi400GROUNDWATERIn compliance
Saint Louis Park MunicipalSt. Louis Park0.6 mi50,010GROUNDWATERIn compliance
Countryside Estates PrivateSt. Louis Park0.6 mi116GROUNDWATERIn compliance
Hopkins MunicipalHopkins1.9 mi19,462GROUNDWATERIn compliance

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 (15 Census block groups, population-weighted demographics): a population of 16,795. Why we surface this →

POPULATION SHARE
21.4%

Low-income

POPULATION SHARE
29.1%

People of color

POPULATION SHARE
6.3%

Under age 5

POPULATION SHARE
15.8%

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.