Total TRI releases
Total TRI releases at Hennepin County have more than doubled since 2010 (through 2024).
County · TRI 2024
Hennepin County, Minnesota Pollution
10 top TRI facilities tracked here. PM2.5 annual mean (NAAQS 9 µg/m³ (annual)) fell meaningfully year over year (-24%). PM2.5 annual mean (NAAQS 9 µg/m³ (annual)) concentrations have fallen 38% since 2010.
FIPS 27053 · population 1,270,787
Anomaly engine
Notable Signals
Top facilities mapped
Where Chemicals Are Released In Hennepin County
Each red dot is one of the top TRI facilities. Size reflects 2024 total releases. County boundary outlined in blue.
Pollutant pathways
Hennepin County Pollutant Multi-Year Trends
PM2.5 annual mean (NAAQS 9 µg/m³ (annual))Health riskFine inhalable particles 2.5 micrometers or smaller. They travel deep into the lungs and into the bloodstream — linked to asthma, heart disease, stroke, and premature death.
PM2.5 annual mean (NAAQS 9 µg/m³ (annual)) concentrations have fallen 38% since 2010.
PM2.5 24-hour 98th percentile (NAAQS 35 µg/m³ (24-hour))Health riskFine inhalable particles 2.5 micrometers or smaller. They travel deep into the lungs and into the bloodstream — linked to asthma, heart disease, stroke, and premature death.
PM2.5 24-hour 98th percentile (NAAQS 35 µg/m³ (24-hour)) concentrations have fallen 22% since 2010.
Ozone 8-hour 4th-highest daily max (NAAQS 0.070 ppm (8-hour))Health riskGround-level ozone (smog) forms when vehicle and industrial emissions react in sunlight. Inflames the airways, triggers asthma attacks, and worsens heart and lung disease.
Ozone 8-hour 4th-highest daily max (NAAQS 0.070 ppm (8-hour)) concentrations have fallen 18% since 2013.
NO₂ annual mean (NAAQS 53 ppb (annual))Health riskA tailpipe and combustion gas. Concentrates near busy roads and industrial sites; raises risk of airway inflammation, asthma, and lower respiratory infections in children.
NO₂ annual mean (NAAQS 53 ppb (annual)) concentrations have more than halved since 2010.
Lifetime cancer risk all pollutants (100 in a million (EPA elevated threshold))Health riskEPA-modeled added cancer cases per million residents from a lifetime of breathing local air toxics. EPA flags 100-in-a-million as elevated.
Single-vintage exposure modeling — EPA cadence is multi-year, so no trend line yet.
Formaldehyde ambient mean (0.077 µg/m³ (1-in-a-million URE))Health riskAn air toxic emitted by refineries, wood products, and combustion. EPA classifies it as a known human carcinogen — long-term inhalation raises cancer risk.
Single-vintage exposure modeling — EPA cadence is multi-year, so no trend line yet.
Benzene ambient mean (0.13 µg/m³ (1-in-a-million URE))Health riskAn air toxic from gasoline, refineries, and tobacco smoke. A known human carcinogen — chronic exposure is linked to leukemia and other blood cancers.
Single-vintage exposure modeling — EPA cadence is multi-year, so no trend line yet.
TRI air releases (5.1 fugitive + 5.2 stack)Health riskToxic chemicals reported by industrial facilities as released into the air — fugitive leaks plus smokestack emissions. Higher pounds means more inhaled exposure for nearby residents.
TRI air releases (5.1 fugitive + 5.2 stack) concentrations have fallen 18% since 2010.
TRI water releases (5.3)Health riskToxic chemicals reported by industrial facilities as discharged to surface waters (rivers, lakes, the ocean). Affects fishing, recreation, and downstream drinking-water intakes.
TRI water releases (5.3) volumes here are too small to anchor a multi-year trend; YoY movement is still shown above.
TRI land + off-site releasesHealth riskToxic chemicals released to land on-site or transferred off-site for disposal — landfills, deep-well injection, and similar. Risks groundwater contamination over time.
TRI land + off-site releases concentrations have more than doubled since 2010.
Greenhouse gases (GHGRP large emitters, through 2023)Health riskGreenhouse gases reported by large industrial emitters under EPA's GHGRP, in metric tons of CO₂ equivalent. Drives climate warming and the heat-related health effects that follow.
Greenhouse gases (GHGRP large emitters, through 2023) concentrations are up 29% since 2010.
Top facilities · 2024
Where The Chemical Releases Are Concentrated
| Facility | City | Top chemical | Total releases | YoY |
|---|---|---|---|---|
| Filmtec CorpDupont De Nemours INC | Edina | N,N-DimethylformamideHealth riskHepatotoxin; absorbed through skin; IARC Group 2A probable carcinogen. (IARC) | 1.2M lb | -6% |
| Veolia Wts Solutions USA INC.Veolia Water Technologies Treatment Solutions USA INC | Minnetonka | N,N-DimethylformamideHealth riskHepatotoxin; absorbed through skin; IARC Group 2A probable carcinogen. (IARC) | 246k lb | -16% |
| Flame Metals Processing Corp | Rogers | Sodium nitrite | 52k lb | +30% |
| Consolidate Precision Products-Minneapolis OperationWp Cpp Holdings LLC | Bloomington | Aluminum (fume or dust)Health riskInhaled aluminum fumes can cause lung scarring (aluminosis); high cumulative exposure has been linked to neurological effects. (NIOSH) | 43k lb | +3% |
| Nico Products INC | Minneapolis | Zinc compoundsHealth riskGenerally low acute toxicity. Chronic high-dose exposure disrupts copper absorption and immune function. (ATSDR) | 33k lb | -19% |
| Upsher-Smith Laboratories LLC | Maple Grove | MethanolHealth riskAcutely toxic if ingested or inhaled. Metabolizes to formaldehyde and formic acid, causing blindness and metabolic acidosis. (EPA) | 29k lb | +1137% |
| Macdermid Enthone America LLCElement Solutions INC | Maple Plain | Nitric acidHealth riskStrong corrosive irritant to skin, eyes, and the respiratory tract. (NIOSH) | 16k lb | +217% |
| The Sierra CO LLCTk Products | Minnetonka | Xylene (mixed isomers)Health riskEye, skin, and respiratory irritant; central-nervous-system effects from chronic exposure. (EPA) | 15k lb | -6% |
| Boston Scientific Weaver Lake CampusBoston Scientific CORP | Maple Grove | MethanolHealth riskAcutely toxic if ingested or inhaled. Metabolizes to formaldehyde and formic acid, causing blindness and metabolic acidosis. (EPA) | 11k lb | +0% |
| Interplastic CorpIp CORP | Minneapolis | StyreneHealth riskIARC Group 2A probable carcinogen; central-nervous-system effects from inhalation. (IARC, EPA) | 10k lb | +17% |
Superfund / NPL sites
Federal Cleanup Sites In Hennepin County
Sites on EPA's Superfund National Priorities List, plus deleted sites whose cleanup objectives EPA has finalized. Federal-facility sites (defense, DOE, etc.) are flagged separately. Each link routes to a per-site page.
| Site | City | Status | Federal facility | Primary contaminant |
|---|---|---|---|---|
| General Mills/Henkel Corp. | Minneapolis | NPL FINAL | No | 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) |
| Highway 100 And County Road 3 Groundwater Plume | St. Louis Park | NPL FINAL | No | — |
| Joslyn Manufacturing & Supply Co. | Brooklyn Center | NPL FINAL | No | PentachlorophenolHealth riskIARC Group 1 carcinogen; wood preservative; persistent in soil and groundwater. (IARC, EPA) |
| Reilly Tar & Chemical Corp. (St. Louis Park Plant) | St. Louis Park | NPL FINAL | No | 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) |
| South Minneapolis Residential Soil Contamination | Minneapolis | NPL FINAL | No | 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) |
| Southeast Hennepin Area Groundwater And Vapor | Minneapolis | NPL FINAL | No | — |
| Spring Park Municipal Well Field | Spring Park | NPL FINAL | No | — |
| Nl Industries/Taracorp/Golden Auto | St. Louis Park | DELETED | No | LeadHealth riskNeurotoxin. Even low childhood exposure impairs cognitive development; chronic adult exposure damages kidneys and the cardiovascular system. (EPA, ATSDR) |
| Twin Cities Air Force Reserve Base (Small Arms Range Landfill) | Minneapolis | DELETED | FEDERAL | 1,2-Dichloroethene (Cis And Trans Mixture) |
| Union Scrap Iron & Metal Co. | Minneapolis | DELETED | No | — |
Showing the top 10 sites by status priority. 1 additional NPL-relevant sites in Hennepin County have entity pages — browse them via the host-county or host-city page rollups.
Equity context · ACS 2018-2022 · USEPA-clone EJ disparity
Who Lives In Hennepin County
All block groups in Hennepin County County, MN: 1,270,787 residents. County disparity score for pm2.5 (fine particulate) sits well below the reference (29). Why we surface this →
9.8%
Low-income
33.1%
People of color
6.1%
Under age 5
14.8%
Over age 64
- PM2.5 (fine particulate)Health riskFine inhalable particles 2.5 micrometers or smaller. They travel deep into the lungs and into the bloodstream — linked to asthma, heart disease, stroke, and premature death.25below the national median
- OzoneHealth riskGround-level ozone (smog) inflames the airways. Even short exposures trigger asthma attacks and worsen chronic lung and heart disease.25below the national median
- Nitrogen dioxide (NO₂)Health riskA tailpipe and combustion gas. Concentrates near busy roads and industrial sites; raises risk of airway inflammation, asthma, and lower respiratory infections in children.83in the highest 20% nationally
- Diesel particulateHealth riskSoot from diesel engines (trucks, trains, ports, construction). EPA classifies it as a likely human carcinogen and a major driver of childhood asthma near freight corridors.81in the highest 20% nationally
- Toxic releases (RSEI)Health riskEPA's Risk-Screening Environmental Indicators score — weights TRI chemical releases by toxicity, where they go, and how many people are nearby. Higher means greater modeled cancer and chronic-health risk.68above the national median
- Traffic proximityHealth riskPopulation-weighted distance to high-volume roads. Living close to heavy traffic raises exposure to PM2.5, NO₂, and diesel exhaust — and the cardiovascular and asthma risks that follow.83in the highest 20% nationally
- Lead-paint risk (pre-1960 housing)Health riskShare of housing built before 1960, when lead-based paint was common. Dust from deteriorating paint is the leading cause of childhood lead poisoning, which permanently impairs cognitive development.70above the national median
- Superfund site proximityHealth riskPopulation-weighted distance to NPL Superfund sites — the most contaminated waste sites in the country. Nearby groundwater, soil, and air can carry industrial solvents, metals, and other long-lived contaminants.94in the highest 10% nationally
- RMP-facility proximityHealth riskDistance to facilities holding chemicals at quantities large enough to require an EPA Risk Management Plan (refineries, fertilizer plants, etc.). These pose acute exposure risk during accidental releases.76above the national median
- Hazardous-waste site proximityHealth riskDistance to RCRA hazardous-waste handlers (treatment, storage, disposal facilities). Indicates potential exposure to industrial chemicals in air, soil, and groundwater.84in the highest 20% nationally
- Underground storage tanksHealth riskDensity of underground tanks (gasoline, heating oil, industrial fluids). Leaking tanks are a leading source of benzene and other volatile organic compounds in groundwater drinking-water supplies.72above the national median
- NPDES wastewater proximityHealth riskDistance to permitted industrial wastewater dischargers. Closer proximity raises exposure to pollutants released into surface waters used for fishing, recreation, and downstream drinking-water intakes.42near the national median
- Drinking-water non-complianceHealth riskEPA score for public water systems with health-based Safe Drinking Water Act violations. Higher means more residents on systems that recently exceeded safe limits for contaminants like lead, arsenic, or nitrate.79above the national median
| Indicator | Disparity score | Reading |
|---|---|---|
| PM2.5 (fine particulate) | 29 | well below the reference |
| Ozone | 26 | well below the reference |
| Nitrogen dioxide (NO₂) | 85 | below the reference |
| Diesel particulate | 84 | below the reference |
| Toxic releases (RSEI) | 69 | below the reference |
| Traffic proximity | 84 | below the reference |
| Lead-paint risk (pre-1960 housing) | 58 | below the reference |
| Superfund site proximity | 86 | below the reference |
| RMP-facility proximity | 76 | below the reference |
| Hazardous-waste site proximity | 86 | below the reference |
| Underground storage tanks | 56 | below the reference |
| NPDES wastewater proximity | 25 | well below the reference |
| Drinking-water non-compliance | 41 | well below the reference |
Source: Census ACS 2018-2022 (5-year) + USEPA-clone EJ blockgroup stats (raw indicators + EJ disparity mirror).
Health context
Co-Located Health Indicators
Modeled adult-prevalence estimates published by CDC PLACES, paired with this county's pollution and demographic context. Comparisons are ecological, not causal — pollution and disease prevalence covary at the area level, but the data does not attribute any individual's diagnosis to local exposure. How this section works →
Adult asthma (current)
9.6%
CDC PLACES · 2025 release · BRFSS 2022-2023
COPD prevalence
4.4%
CDC PLACES · 2025 release · BRFSS 2022-2023
Coronary heart disease
5.0%
CDC PLACES · 2025 release · BRFSS 2022-2023
Diabetes (diagnosed)
8.1%
CDC PLACES · 2025 release · BRFSS 2022-2023
Frequent mental distress
14.5%
CDC PLACES · 2025 release · BRFSS 2022-2023
PLACES uses BRFSS-modeled small-area estimates, not individual records. Crude prevalence shown above is the local rate as published; comparators are age-adjusted vs the Minnesota mean and the US mean — both population-weighted across counties — so geographies with different age structures stay apples-to-apples. Sources: CDC PLACES · 2025 release · BRFSS 2022-2023.
Browse
All 34 Hennepin County Cities With TRI Data
Pollution trends and TRI 2024 pages for every tracked city in this county. Alphabetical.
- Bloomington pollution· 8 facilities
- Brooklyn Center pollution· 0 facilities
- Brooklyn Park pollution· 6 facilities
- Champlin pollution· 0 facilities
- Corcoran pollution· 0 facilities
- Crystal pollution· 0 facilities
- Dayton pollution· 2 facilities
- Eden Prairie pollution· 2 facilities
- Edina pollution· 1 facility
- Excelsior pollution· 0 facilities
- Golden Valley pollution· 2 facilities
- Greenfield pollution· 1 facility
- Hopkins pollution· 1 facility
- Long Lake pollution· 0 facilities
- Loretto pollution· 0 facilities
- Maple Grove pollution· 5 facilities
- Maple Plain pollution· 1 facility
- Minneapolis pollution· 19 facilities
- Minnetonka pollution· 3 facilities
- Minnetonka Beach pollution· 0 facilities
- Minnetrista pollution· 0 facilities
- Mound pollution· 0 facilities
- New Hope pollution· 3 facilities
- Orono pollution· 0 facilities
- Osseo pollution· 1 facility
- Plymouth pollution· 3 facilities
- Richfield pollution· 0 facilities
- Robbinsdale pollution· 0 facilities
- Rogers pollution· 4 facilities
- Shorewood pollution· 0 facilities
- Spring Park pollution· 1 facility
- St. Bonifacius pollution· 0 facilities
- St. Louis Park pollution· 1 facility
- Wayzata pollution· 0 facilities
Sources.
- EPA Toxics Release Inventory · retrieved 2026-05-07.
All sources are federal public-domain datasets under 17 USC §105. We aggregate but do not relabel; the underlying observations remain attributable to EPA.