TRI land + off-site releases
TRI land + off-site releases at Arkansas have more than doubled since 2010 (through 2024).
State · TRI 2024
Arkansas Pollution
275 TRI facilities, 666 public water systems, and 17 Superfund / NPL sites across 57 counties. Statewide TRI releases more than doubled year over year (+116%). Toxic releases concentrations have more than doubled since 2010.
FIPS 05 · population 3,011,524 · 75 counties total
Anomaly engine
Notable Signals At The State Level
Total TRI releases
Total TRI releases at Arkansas have more than doubled since 2010 (through 2024).
TRI water releases
TRI water releases at Arkansas have risen 84% since 2010 (through 2024).
Where the burden sits
County-Level TRI Choropleth
A color-shaded map of pollution data. Darker counties report more pounds of toxic chemicals released to the EPA's Toxics Release Inventory (TRI).
Shaded by total reported releases for 2024. Counties without a published page render as “no TRI data”. Red dots mark this state's top emitters.
Statewide pollutant pathways
Arkansas 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 39% 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 25% since 2010.
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 are roughly unchanged from 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) concentrations are up 84% since 2010.
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 11% since 2010.
| County | Population | Facilities | Total releases | YoY | Top chemical |
|---|---|---|---|---|---|
| Clark CountyFIPS 05019 | 21,469 | 4 | 40.0M lb | +1523% | Cyanide compoundsHealth riskAcutely lethal at high doses by blocking cellular respiration; chronic low-dose exposure damages the thyroid and nervous system. (EPA, ATSDR) |
| Union CountyFIPS 05139 | 38,815 | 13 | 7.4M lb | +14% | AmmoniaHealth riskSevere respiratory and eye irritant; high concentrations cause chemical burns to lung tissue. (EPA) |
| Mississippi CountyFIPS 05093 | 40,361 | 18 | 4.9M lb | +4% | Carbon disulfide |
| Jefferson CountyFIPS 05069 | 66,934 | 10 | 4.7M lb | +2% | MethanolHealth riskAcutely toxic if ingested or inhaled. Metabolizes to formaldehyde and formic acid, causing blindness and metabolic acidosis. (EPA) |
| Little River CountyFIPS 05081 | 12,024 | 2 | 2.8M lb | +16% | MethanolHealth riskAcutely toxic if ingested or inhaled. Metabolizes to formaldehyde and formic acid, causing blindness and metabolic acidosis. (EPA) |
| Johnson CountyFIPS 05071 | 25,925 | 4 | 1.8M lb | +2169% | Nitrate compounds (water dissociable; reportable only when in aqueous solution)Health riskDrinking-water nitrate causes methemoglobinemia ('blue-baby syndrome') in infants; EPA MCL is 10 mg/L as N. (EPA) |
| Hempstead CountyFIPS 05057 | 20,037 | 6 | 1.7M lb | +1% | Nitrate compounds (water dissociable; reportable only when in aqueous solution)Health riskDrinking-water nitrate causes methemoglobinemia ('blue-baby syndrome') in infants; EPA MCL is 10 mg/L as N. (EPA) |
| Garland CountyFIPS 05051 | 100,021 | 5 | 1.6M lb | +23% | Nickel And Nickel CompoundsHealth riskNickel compounds are IARC Group 1 carcinogens; inhalation exposure raises lung and nasal cancer risk. (IARC) |
| Conway CountyFIPS 05029 | 20,782 | 2 | 1.3M lb | +4% | MethanolHealth riskAcutely toxic if ingested or inhaled. Metabolizes to formaldehyde and formic acid, causing blindness and metabolic acidosis. (EPA) |
| Columbia CountyFIPS 05027 | 22,707 | 7 | 1.1M lb | +28% | AmmoniaHealth riskSevere respiratory and eye irritant; high concentrations cause chemical burns to lung tissue. (EPA) |
| Facility | City | Top chemical | Total releases | YoY |
|---|---|---|---|---|
| Elemental Environmental Solutions LLCVeolia North America | Arkadelphia | Cyanide compoundsHealth riskAcutely lethal at high doses by blocking cellular respiration; chronic low-dose exposure damages the thyroid and nervous system. (EPA, ATSDR) | 39.8M lb | +1586% |
| Clean Harbors El Dorado LLCClean Harbors INC | El Dorado | Chromium and Chromium Compounds(except for chromite ore mined in the Transvaal Region)Health riskHexavalent chromium (Cr-VI) is an IARC Group 1 carcinogen via inhalation, causing lung cancer; trivalent chromium is far less toxic. (IARC, EPA) | 4.4M lb | +14% |
| Suzano PackagingSuzano Packaging LLC | Pine Bluff | MethanolHealth riskAcutely toxic if ingested or inhaled. Metabolizes to formaldehyde and formic acid, causing blindness and metabolic acidosis. (EPA) | 3.1M lb | +15% |
| Domtar A.W. LLC Ashdown MillDomtar CORP | Ashdown | MethanolHealth riskAcutely toxic if ingested or inhaled. Metabolizes to formaldehyde and formic acid, causing blindness and metabolic acidosis. (EPA) | 2.5M lb | +19% |
| Viskase Cos INCViskase Cos INC | Osceola | Carbon disulfide | 1.9M lb | +6% |
| Tyson Poultry INC.Tyson Foods INC | Clarksville | Nitrate compounds (water dissociable; reportable only when in aqueous solution)Health riskDrinking-water nitrate causes methemoglobinemia ('blue-baby syndrome') in infants; EPA MCL is 10 mg/L as N. (EPA) | 1.7M lb | +45876% |
| US Vanadium LLCUS Vanadium Holding Co LLC | Hot Springs | Nickel And Nickel CompoundsHealth riskNickel compounds are IARC Group 1 carcinogens; inhalation exposure raises lung and nasal cancer risk. (IARC) | 1.6M lb | +23% |
| Green Bay Packaging INC. Arkansas Kraft DivGreen Bay Packaging INC | Morrilton | MethanolHealth riskAcutely toxic if ingested or inhaled. Metabolizes to formaldehyde and formic acid, causing blindness and metabolic acidosis. (EPA) | 1.3M lb | +4% |
| Plum Point Energy StationPlum Point Energy Associates LLC | Osceola | Barium compounds (except for barium sulfate (CAS No. 7727-43-7))Health 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) | 1.2M lb | -10% |
| American Kraft Paper Industries LLCAmerican Industrial Acquisition CORP | White Hall | MethanolHealth riskAcutely toxic if ingested or inhaled. Metabolizes to formaldehyde and formic acid, causing blindness and metabolic acidosis. (EPA) | 1.1M lb | -12% |
Water utilities to watch
Largest Water Systems With Unresolved Health-Based Violations
Sorted to surface utilities serving the most people that still have an active health-based SDWIS violation on the record. Systems in compliance with no unresolved issues fall to the bottom of the ranking.
| Water system | PWSID | Population served | Health-based · 5yr | Status |
|---|---|---|---|---|
| Siloam Springs Waterworks Municipal | AR0000056 | 21,430 | 5 | UNRESOLVED |
| Community Water System Municipal | AR0000101 | 18,628 | 2 | UNRESOLVED |
| El Dorado Waterworks Municipal | AR0000550 | 17,932 | 7 | UNRESOLVED |
| Conway Co Regional Water Dist Municipal | AR0000119 | 17,858 | 1 | UNRESOLVED |
| Marion Waterworks Municipal | AR0000152 | 13,032 | 4 | UNRESOLVED |
| James Fork Regional Water District Municipal | AR0000513 | 11,538 | 6 | UNRESOLVED |
| Prairie Grove Waterworks Municipal | AR0000573 | 9,615 | 15 | UNRESOLVED |
| Nashville Rural Water Authority Private | AR0000805 | 7,291 | 31 | UNRESOLVED |
| Ne Yell County Water Assoc Municipal | AR0000697 | 7,198 | 19 | UNRESOLVED |
| Berryville Waterworks Municipal | AR0000074 | 6,813 | 5 | UNRESOLVED |
Superfund / NPL sites
Federal Cleanup Sites In Arkansas
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 |
|---|---|---|---|---|
| Arkwood, Inc. | Omaha | NPL FINAL | No | Base Neutral Acids |
| Cedar Chemical Corporation | West Helena | NPL FINAL | No | — |
| Macmillan Ring Free Oil | Norphlet | NPL FINAL | No | — |
| Mid-South Wood Products | Mena | NPL FINAL | No | 1,2-Dihydroacenaphthylene |
| Mountain Pine Pressure Treating | Plainview | 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) |
| Old Midland Products | Ola/Birta | NPL FINAL | No | PentachlorophenolHealth riskIARC Group 1 carcinogen; wood preservative; persistent in soil and groundwater. (IARC, EPA) |
| Ouachita Nevada Wood Treater | Reader | NPL FINAL | No | 2-Methylnaphthalene |
| Popile, Inc. | El Dorado | NPL FINAL | No | 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) |
| Vertac, Inc. | Jacksonville | NPL FINAL | No | 1,2,4,5-Tetrachlorobenzene |
| Cecil Lindsey | Newport | DELETED | 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) |
Showing the top 10 sites by status priority. 7 additional NPL-relevant sites in Arkansas have entity pages — browse them via the host-county or host-city page rollups.
Equity context · ACS 2018-2022 · USEPA-clone EJ disparity
Statewide Population Characteristics
All Arkansas block groups: 3,011,524 residents. Statewide disparity score for pm2.5 (fine particulate) sits below the reference (78). Why we surface this →
State-level percentiles are aggregated from block-group EJScreen data. The EJ pattern within the state will be sharper at the county level — drill down for the meaningful spatial detail.
16.2%
Low-income
30.3%
People of color
6.4%
Under age 5
17.2%
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.55near the national median
- OzoneHealth riskGround-level ozone (smog) inflames the airways. Even short exposures trigger asthma attacks and worsen chronic lung and heart disease.22below 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.23below the national median
- 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.26below the national median
- 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.93in the highest 10% nationally
- 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.36below the national median
- 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.48near 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.56near the national median
- 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.67above 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.41near the national median
- 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.54near 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.77above 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.86in the highest 20% nationally
| Indicator | Disparity score | Reading |
|---|---|---|
| PM2.5 (fine particulate) | 78 | below the reference |
| Ozone | 46 | well below the reference |
| Nitrogen dioxide (NO₂) | 40 | well below the reference |
| Diesel particulate | 40 | well below the reference |
| Toxic releases (RSEI) | 62 | below the reference |
| Traffic proximity | 44 | well below the reference |
| Lead-paint risk (pre-1960 housing) | 51 | below the reference |
| Superfund site proximity | 8 | well below the reference |
| RMP-facility proximity | 64 | below the reference |
| Hazardous-waste site proximity | 47 | well below the reference |
| Underground storage tanks | 63 | below the reference |
| NPDES wastewater proximity | 61 | below the reference |
| Drinking-water non-compliance | 24 | well below the reference |
Source: Census ACS 2018-2022 (5-year) + USEPA-clone EJ blockgroup stats (raw indicators + EJ disparity mirror). EJ disparity scores via the USEPA-clone GitHub mirror after EPA deprecated the public EJScreen tool in 2025; demographics from Census ACS.
Browse
All 57 Arkansas Counties With TRI Data
Pollution trends and TRI 2024 pages for every tracked county. Alphabetical.
- Arkansas County pollution· 5 facilities
- Ashley County pollution· 3 facilities
- Baxter County pollution· 5 facilities
- Benton County pollution· 15 facilities
- Boone County pollution· 4 facilities
- Bradley County pollution· 1 facility
- Calhoun County pollution· 3 facilities
- Carroll County pollution· 2 facilities
- Clark County pollution· 4 facilities
- Cleburne County pollution· 2 facilities
- Cleveland County pollution· 1 facility
- Columbia County pollution· 7 facilities
- Conway County pollution· 2 facilities
- Craighead County pollution· 11 facilities
- Crawford County pollution· 4 facilities
- Crittenden County pollution· 5 facilities
- Desha County pollution· 2 facilities
- Drew County pollution· 1 facility
- Faulkner County pollution· 7 facilities
- Franklin County pollution· 3 facilities
- Garland County pollution· 5 facilities
- Grant County pollution· 2 facilities
- Greene County pollution· 8 facilities
- Hempstead County pollution· 6 facilities
- Hot Spring County pollution· 5 facilities
- Howard County pollution· 4 facilities
- Independence County pollution· 6 facilities
- Jackson County pollution· 2 facilities
- Jefferson County pollution· 10 facilities
- Johnson County pollution· 4 facilities
- Lawrence County pollution· 1 facility
- Little River County pollution· 2 facilities
- Logan County pollution· 2 facilities
- Lonoke County pollution· 3 facilities
- Madison County pollution· 1 facility
- Marion County pollution· 4 facilities
- Miller County pollution· 4 facilities
- Mississippi County pollution· 18 facilities
- Nevada County pollution· 1 facility
- Ouachita County pollution· 1 facility
- Phillips County pollution· 5 facilities
- Polk County pollution· 2 facilities
- Pope County pollution· 9 facilities
- Prairie County pollution· 1 facility
- Pulaski County pollution· 24 facilities
- Randolph County pollution· 2 facilities
- Saline County pollution· 1 facility
- Scott County pollution· 1 facility
- Searcy County pollution· 2 facilities
- Sebastian County pollution· 16 facilities
- Sevier County pollution· 1 facility
- St Francis pollution· 1 facility
- Union County pollution· 13 facilities
- Washington County pollution· 15 facilities
- White County pollution· 2 facilities
- Woodruff County pollution· 1 facility
- Yell County pollution· 3 facilities
Sources.
- EPA Toxics Release Inventory · retrieved 2026-05-07.