St. Louis County, MN
The federal environmental record for St. Louis County (population 200,514): what is on file, where it is, and what remains open. Sources and retrieval dates are on the methodology page.
2
Superfund NPL sites
18
federal cleanup sites
1
PFAS-detecting water systems
17
TRI facilities
42
open tank releases
Superfund NPL sites
| Site | City | Status | Listed |
|---|---|---|---|
| Arrowhead Refinery Co. | Hermantown | deleted | 09/21/1984 |
| St. Louis River Site | St. Louis County | on the NPL | 09/21/1984 |
Drinking water: PFAS testing
Public water systems serving St. Louis with at least one PFAS detection under UCMR5. The federal limit for PFOA and PFOS is 4 ng/L; EPA proposed in May 2026 to rescind the limits for the other compounds, which are shown for information.
| System | Highest results | Reading |
|---|---|---|
| Eveleth MN1690018 | PFBA: 5.3 ng/L | detected |
On a system with detections? Testing and treatment options
Facilities reporting toxic releases (2024)
17 facilities in St. Louis filed TRI reports for 2024, totalling 301k lb released.
| Facility | City | Top chemicals | Total released |
|---|---|---|---|
| ME GLOBAL INC | DULUTH | Manganese And Manganese Compounds, Chromium and Chromium Compounds(except for chromite ore mined in the Transvaal Region) | 124k lb |
| CIRRUS DESIGN CORP/CIRRUS AIRCRAFT | DULUTH | Toluene | 83k lb |
| HIBBARD RENEWABLE ENERGY CENTER | DULUTH | Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size), Zinc compounds | 54k lb |
| MN TWIST DRILL AQUISITION LLC | CHISHOLM | Barium | 24k lb |
| CAST7 LLC | HIBBING | Aluminum oxide (fibrous forms), Manganese | 14k lb |
| COMPASS MINERALS AMERICA INC | DULUTH | Manganese compounds, Zinc compounds | 2k lb |
| DETROIT REMAN-DMR ELECTRONICS | HIBBING | Lead | 350 lb |
| HIBBING RENEWABLE ENERGY CENTER | HIBBING | Lead compounds, Dioxin and dioxin-like compounds | 31 lb |
| DYNO NOBEL INC | BIWABIK | Nitrate compounds (water dissociable; reportable only when in aqueous solution), Ammonia | 27 lb |
| ALTEC INDUSTRIES INC. | DULUTH | Manganese | 27 lb |
| NORTHERN FOUNDRY | HIBBING | Lead | 20 lb |
| L&M RADIATOR INC | HIBBING | Copper | 8 lb |
| PRIMARY PRODUCTS INGREDIENTS AMERICAS LLC - DULUTH | DULUTH | Maleic anhydride | 7 lb |
| AUSTIN POWDER MINING LLC | HIBBING | - | 0 lb |
| HIREL SYSTEMS LLC | DULUTH | - | 0 lb |
| IRATHANE SYSTEMS-MINNESOTA LLC | HIBBING | Diisocyanates | 0 lb |
| FEDERAL PRISON CAMP | DULUTH | - | 0 lb |
Underground fuel tanks
EPA's UST Finder records 926 tank facilities in St. Louis: 503 tanks in service and 2,317 closed. 999 fuel releases are on record, of which 42 remain open. Open releases are cleanups that have not reached "no further action".
Radon
EPA maps St. Louis as Zone 2, moderate predicted indoor radon (2 to 4 pCi/L average). Radon and air quality are covered in depth on lung.com.
The record for one specific address
County figures blur what matters: distance. The Address Environmental Report runs these same federal datasets against one address and reports every site, tank, polluter and water result around it, with distances, in about a minute.
Get the report - $39All federal cleanup sites on file
The wider Superfund enterprise inventory (SEMS) for St. Louis, including sites assessed but never listed. Presence here records that EPA had reason to look, not a finding of danger.
- ARROWHEAD REFINERY CO.HERMANTOWN
- BNSF GLACIER PARK ROUNDHOUSEDULUTH
- DYNO NOBEL/MINNESOTA EXPLOSIVESBIWABIK
- FORMER J&D SERVICESAURORA
- HIBBING ABANDONED BARRELSHIBBING
- HIBBING CHRYSLER CENTERHIBBING
- HIBBING GAS MFG SITEHIBBING
- J&D ENTERPRISESAURORA
- MINNESOTA AVENUE TCE INVESTIGATIONDULUTH
- MUD LAKE SLAG DISPOSAL AREA, SA4561DULUTH
- NORTHERN HEIGHTS MINE DUMP ACIDIC SEEPSVIRGINIA
- POPLAR HILL GROUNDWATERHIBBING
- ST. LOUIS RIVER SITEST. LOUIS COUNTY
- STAVER FOUNDRY COVIRGINIA
- US AFB DULUTH INTL AIRPORTDULUTH
- US COAST GUARD - DULUTHDULUTH
- VIRGINIA GAS MANUFACTURINGVIRGINIA
- WEST RAMSEY STREET SOIL VAPORDULUTH