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Anaconda Aluminum Co Columbia Falls Reduction Plant

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

Eastern End Of Aluminum Drive, Columbia Falls, Montana · ZIP 59912 · EPA ID MTD057561763

See Flathead 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
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)Liquid Waste1
AluminumHealth riskInhaled aluminum fumes can cause lung scarring (aluminosis); high cumulative exposure has been linked to neurological effects. (NIOSH)Sludge1
AluminumHealth riskInhaled aluminum fumes can cause lung scarring (aluminosis); high cumulative exposure has been linked to neurological effects. (NIOSH)Soil1
AluminumHealth riskInhaled aluminum fumes can cause lung scarring (aluminosis); high cumulative exposure has been linked to neurological effects. (NIOSH)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)Liquid Waste1
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)Sediment1
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)Sludge1
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
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
CadmiumLiquid Waste1
CadmiumSludge1
CopperHealth riskInhaled copper fumes cause metal-fume fever; chronic ingestion above EPA's 1.3 mg/L action level damages the liver. (EPA)Liquid Waste1
CopperHealth riskInhaled copper fumes cause metal-fume fever; chronic ingestion above EPA's 1.3 mg/L action level damages the liver. (EPA)Sediment1
CopperHealth riskInhaled copper fumes cause metal-fume fever; chronic ingestion above EPA's 1.3 mg/L action level damages the liver. (EPA)Soil1
CopperHealth riskInhaled copper fumes cause metal-fume fever; chronic ingestion above EPA's 1.3 mg/L action level damages the liver. (EPA)Surface Water1
CyanideHealth riskAcutely lethal at high doses by blocking cellular respiration; chronic low-dose exposure damages the thyroid and nervous system. (EPA, ATSDR)Groundwater1
CyanideHealth riskAcutely lethal at high doses by blocking cellular respiration; chronic low-dose exposure damages the thyroid and nervous system. (EPA, ATSDR)Sediment1
CyanideHealth riskAcutely lethal at high doses by blocking cellular respiration; chronic low-dose exposure damages the thyroid and nervous system. (EPA, ATSDR)Surface Water1
FluorideHealth riskBeneficial at low doses (1 mg/L) for dental health; chronic exposure above 4 mg/L causes skeletal fluorosis. EPA MCL 4 mg/L. (EPA)Liquid Waste1
IronSurface Water1
LeadHealth riskNeurotoxin. Even low childhood exposure impairs cognitive development; chronic adult exposure damages kidneys and the cardiovascular system. (EPA, ATSDR)Sludge1
NickelHealth riskNickel compounds are IARC Group 1 carcinogens; inhalation exposure raises lung and nasal cancer risk. (IARC)Sludge1
NickelHealth riskNickel compounds are IARC Group 1 carcinogens; inhalation exposure raises lung and nasal cancer risk. (IARC)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)Liquid Waste1
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)Sludge1
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
SeleniumSludge1
SeleniumSoil1
ThalliumSoil1

Showing the top 30 pairs by SEMS citation count. 5 additional (contaminant, pathway) pairs are recorded for this site.

Drinking-water linkage · SDWIS

Groundwater Systems Serving Communities Within 3 Miles

The 26 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
Riverside Mobile Home Park PrivateColumbia Falls2.9 mi100GROUNDWATERIn compliance
Columbia Falls City Of MunicipalColumbia Falls2.9 mi4,450GROUNDWATERIn compliance
Flathead County Water Dist 101 PrivateColumbia Falls2.9 mi210GROUNDWATERUNRESOLVED
Flathead Co Water District No 8 PrivateColumbia Falls2.9 mi475GROUNDWATERIn compliance
Lion Mountain Homeowners Assoc PrivateColumbia Falls2.9 mi204GROUNDWATERIn compliance
Meadow Lake Co Water And Sewer District PrivateColumbia Falls2.9 mi950GROUNDWATERUNRESOLVED
Meadowland Hoa PrivateColumbia Falls2.9 mi150GROUNDWATERIn compliance
Northwoods Water System Coop Inc PrivateColumbia Falls2.9 mi135GROUNDWATERIn compliance
Lakeshore Heights Hoa PrivateColumbia Falls2.9 mi100GROUNDWATERIn compliance
Country Estates Mble Home Park PrivateColumbia Falls2.9 mi125GROUNDWATERIn compliance
Happy Valley Water Dist B Kspl MunicipalColumbia Falls2.9 mi207GROUNDWATERIn compliance
East Wood Village Trailer Park PrivateColumbia Falls2.9 mi36GROUNDWATERIn compliance
Elk Park Village PrivateColumbia Falls2.9 mi35GROUNDWATERIn compliance
Meadow Hills Water And Sewer District PrivateColumbia Falls2.9 mi130GROUNDWATERIn compliance
Kokanee Bend Hoa PrivateColumbia Falls2.9 mi230GROUNDWATERIn compliance
Alpine Village Wua PrivateColumbia Falls2.9 mi125GROUNDWATERIn compliance
Halfmoon Mobile Home Park Inc PrivateColumbia Falls2.9 mi60GROUNDWATERIn compliance
Iron Horse Homeowners Assoc PrivateColumbia Falls2.9 mi335GROUNDWATERIn compliance
Northern Pines Community Hoa PrivateColumbia Falls2.9 mi295GROUNDWATERIn compliance
Stoneridge Home Owners Association PrivateColumbia Falls2.9 mi95GROUNDWATERIn compliance
Prairie Falcon Acres PrivateColumbia Falls2.9 mi41GROUNDWATERIn compliance
Great Bear Estates PrivateColumbia Falls2.9 mi32GROUNDWATERIn compliance
Columbia Range Hoa PrivateColumbia Falls2.9 mi47GROUNDWATERIn compliance
Timber Ridge Hoa PrivateColumbia Falls2.9 mi30GROUNDWATERIn compliance
Whitefish Hills Village PrivateColumbia Falls2.9 mi50GROUNDWATERIn compliance
The Benches PrivateColumbia Falls2.9 mi123GROUNDWATERUNRESOLVED

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

Flathead County, Montana (no Census block groups within 1 mile and no host city — falling back to containing county): a population of 105,950. Why we surface this →

POPULATION SHARE
9.3%

Low-income

POPULATION SHARE
8.9%

People of color

POPULATION SHARE
5.9%

Under age 5

POPULATION SHARE
20.4%

Over age 64

Source: Census ACS 2018-2022 (5-year) + USEPA-clone EJ blockgroup stats (raw indicators + EJ disparity mirror). 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.