TRI Facilities
383
Very high
MS · EPA TRI · SDWIS · Superfund
Mississippi environmental disclosure record
According to EPA's 2023 Toxics Release Inventory, Safe Drinking Water Information System, and Superfund National Priorities List extracts, this is Mississippi's full public registry profile, toxic releases, drinking-water systems, and Superfund sites in one place.
- TRI facilities
- 383
- Reported releases
- 269.4M lbs
- #16 of 56
- Water systems
- 989
- Superfund NPL sites
- 14
Mississippi vs. every U.S. state
Cumulative TRI-reported release pounds, with this state marked in the national distribution
269M lbs Top 29% higher than 71% of 56 states with TRI reporters
Each bar is a $1M-wide band; taller bars hold more states with TRI reporters. The dashed line and filled bar mark this facility. Hover, focus, or tap a bar for its full count, share, and position.
Source U.S. Environmental Protection Agency, Toxics Release Inventory · 2023 reporting year
MS regulatory profile by statute
Violation/site counts mapped to the EPA statutes this portal tracks
- CWA · NPDES
- RCRA · Subtitle C 14
What this shows Counts are mapped to statute as a structural proxy and reflect reported activity, not toxicity-weighted or population-adjusted risk. Clean Air Act (Title V) permit data is not currently ingested by this portal, so air-permit compliance is not shown here.
How Mississippi compares across two EPA disclosure measures
The highlighted point is Mississippi. The vertical axis is the share of tracked water systems with at least one health-based SDWIS record; the horizontal axis is TRI-reported pounds per facility on a logarithmic scale so the full state distribution stays readable. The crosshairs use the portal’s published national benchmark medians.
This matrix compares disclosure rates, not toxicity, exposure, current compliance, or drinking-water safety. A lower position on either axis is not a safety rating; use the underlying facility and water-system records for context.
According to EPA TRI, SDWIS, and Superfund NPL extracts, Mississippi (MS) lists 383 TRI-reporting facilities disclosing 269.4M lbs of toxic releases. The same extracts list 14 Superfund sites and 989 EPA-regulated water systems, of which 316 carry health-based SDWIS violation rows. PlainEnviro's composite environmental health score for Mississippi is 54/100 (grade F), benchmarked against all U.S. states on chemical release intensity, drinking-water health violations, Superfund site burden, and water violation rate. This is a percentile-derived composite from federal disclosure counts, not a clinical health-risk assessment.
F 54
Mississippi Environmental Health Score
A percentile-benchmarked 0–100 composite from 4 EPA federal datasets, with weight redistribution for any unavailable dimension
Chemical Release Intensity F 47
703K (lbs per facility) Drinking Water Health Violations D 63
32.0% (% of systems) Superfund Site Burden F 38
3.7 (sites per 100 facilities) Water Violation Rate D 69
2.1 (violations per system) Benchmarks derived from EPA TRI, SDWIS, and Superfund NPL extracts across all 56 U.S. states and territories
Water Systems
989
Moderate
Superfund Sites
14
Moderate
Total Releases
269.4M lbs
Very high
Compliance Snapshot - MS
Sites with no recorded health violations 77.0%
Sites with at least one open violation 23.0%
Mississippi's profile joins three independently maintained EPA programs into one statewide record: the Toxics Release Inventory (TRI, EPCRA Section 313 industrial disclosures), the Safe Drinking Water Information System (SDWIS, Safe Drinking Water Act compliance), and the Superfund National Priorities List. Each program uses its own reporting cadence and facility-identification scheme; PlainEnviro joins them by matched facility and system location rather than a shared federal ID, so a site absent from one program is never assumed absent from another. The counts below reflect the portal's rebuild as of August 2026.
Activity clusters in counties such as Rankin, Lee, Harrison, which account for the highest combined facility, water-system, and Superfund presence. Monitoring and reporting violations are not included in the SDWIS counts shown here.
Every figure reflects the public regulatory record as filed with the U.S. Environmental Protection Agency and is not weighted for toxicity, geographic footprint, or population exposure. A state can rank high in any individual metric because of industrial history, naturally occurring contaminants in source water, or simply the number of reporting facilities, not because current residents face unsafe conditions. Drill into any county or water system below for the full disclosure record.
What does this state's environmental record show?
TRI Facilities
383
Water Systems
989
Superfund Sites
14
Health-Based Violation Records
2,079
Total Releases
269.4M lbs
cumulative, all reported years
Systems with Records
316
water systems
Release-over-release change
What changed for Mississippi: EPA TRI 2023 reporting year
Same facilities, both years
-17.0%
306 facilities that filed in 2022 and 2023
Whole inventory
-17.1%
56.0 million lb → 46.5 million lb, every facility that filed
Between the two reporting years, 19 facilities filed for the first time and 20 stopped filing. Facilities entering or leaving the inventory are excluded from the same-facility comparison above.
- Mississippi's total reported releases fell from 55.9 million lb in 2022 to 46.4 million lb in 2023, based on EPA TRI filings.
- Mississippi's land releases fell from 26.5 million lb in 2022 to 18.4 million lb in 2023, based on EPA TRI filings.
- Mississippi's air releases fell from 14.7 million lb in 2022 to 13.3 million lb in 2023, based on EPA TRI filings.
- Mississippi's off-site transfers fell from 4.8 million lb in 2022 to 4.5 million lb in 2023, based on EPA TRI filings.
Largest Polluters
View all →| # | Facility | Total Releases |
|---|---|---|
| 1 | Tronox LLC | 64.0M lbs |
| 2 | Chemours Delisle Plant | 59.0M lbs |
| 3 | Georgia Pacific Leaf River Cellulose LLC | 14.4M lbs |
| 4 | Choctaw Generation LP L.l.l.p. | 10.3M lbs |
| 5 | Columbus Cellulose Fibers | 9.8M lbs |
| 6 | Tyson Farms Inc. - Carthage Ms Processing Plant | 9.7M lbs |
| 7 | International Paper-Vicksburg Mill | 9.5M lbs |
| 8 | Georgia-Pacific Monticello LLC | 8.8M lbs |
| 9 | Chevron Products Co Pascagoula Refinery | 7.4M lbs |
| 10 | Cf Industries Nitrogen LLC - Yazoo City Mississippi Plant | 6.9M lbs |
| 11 | Ergon Refining Inc | 5.8M lbs |
| 12 | Sanderson Farms LLC | 5.6M lbs |
| 13 | Sanderson Farms LLC | 5.1M lbs |
| 14 | Southern Hens Inc. | 5.1M lbs |
| 15 | Nucor Steel Jackson Inc | 4.0M lbs |
| 16 | Sanderson Farms LLC | 3.6M lbs |
| 17 | Tyson Farms Inc. | 2.5M lbs |
| 18 | Cottonseed Co-Op Corp | 1.9M lbs |
| 19 | Oxbow Greenwood LLC | 1.7M lbs |
| 20 | Mississippi Power Co - Plant Daniel | 1.3M lbs |
Water Quality
Systems with Health Violations
| Water System | Population | Violations |
|---|---|---|
| TRUELIGHT REDEVELOPMENT GRP #2 | 546 | 120 |
| CITY OF JACKSON | 189,673 | 103 |
| SOUTH CENTRAL WATER ASSN | 12,260 | 86 |
| MOORE BAYOU W/A #3 | 378 | 80 |
| G T & Y WATER DISTRICT INC | 3,907 | 60 |
| HIWANNEE WATER ASSOCIATION #2 | 956 | 46 |
| HANCOCK COUNTY WATER & SEWER | 3,254 | 45 |
| NORTH HINDS W/A #2-CHAPEL HILL | 1,595 | 44 |
| TRAXLER WATER ASSOCIATION | 855 | 42 |
| TOWN OF EDWARDS | 1,980 | 41 |
| BEAVER MEADOW WATERWORKS ASSOCIATION | 1,687 | 39 |
| TOWN OF FLORENCE | 5,824 | 39 |
| VALLEY PARK W/A | 533 | 37 |
| NORTH BENTON W/A | 449 | 34 |
| COAHOMA UTILITY DIST #2 | 645 | 34 |
| TOWN OF COAHOMA | 200 | 32 |
| L & F WATER ASSOCIATION | 1,803 | 31 |
| CLEARY WATER SEWER & FIRE DEPT | 2,500 | 30 |
| H & H WATER SYSTEM, INC | 3,036 | 30 |
| CASCILLA WATER ASSOCIATION | 837 | 29 |
Cities with Water Issues
Starkville
14 water systems
Oxford
11 water systems
Winona
11 water systems
Gulfport
10 water systems
Brandon
10 water systems
Columbus
9 water systems
Grenada
9 water systems
Pontotoc
9 water systems
Charleston
9 water systems
Canton
8 water systems
Carthage
8 water systems
Lexington
8 water systems
Meadville
8 water systems
Forest
7 water systems
Wiggins
7 water systems
Batesville
7 water systems
Booneville
7 water systems
Columbia
7 water systems
Calhoun City
7 water systems
Ethel
7 water systems
Superfund Sites (14)
| Site Name | Status | HRS Score |
|---|---|---|
| American Creosote Works, Inc. | NPL Site | 62.20 |
| Chemfax, Inc. | NPL Site | 38.40 |
| Davis Timber Company | Deleted NPL Site | 48.57 |
| Flowood Site | Deleted NPL Site | 0.00 |
| Hercules Inc | NPL Site | 31.36 |
| Kerr-McGee Chemical Corp - Columbus | NPL Site | 52.47 |
| Mississippi Phosphates Corporation | NPL Site | 50.00 |
| Newsom Brothers/Old Reichhold Chemicals, Inc. | Deleted NPL Site | 45.70 |
| Picayune Wood Treating | NPL Site | 51.03 |
| Red Panther Chemical Company | Deleted NPL Site | 39.43 |
| Rockwell International Wheel & Trim | NPL Site | 50.00 |
| Sonford Products | NPL Site | 31.66 |
| Southeastern Wood Preserving | NPL Site | 48.03 |
| Walcotte Chemical Co. Warehouses | Deleted NPL Site | 0.00 |
Counties (83 total)
| County | Facilities |
|---|---|
| Rankin | 12 |
| Lee | 18 |
| Harrison | 13 |
| Desoto | 16 |
| Hinds | 17 |
| Jones | 15 |
| Bolivar | 5 |
| Madison | 11 |
| Lowndes | 14 |
| Tishomingo | 16 |
| Forrest | 14 |
| Lauderdale | 12 |
| Panola | 3 |
| Attala | 0 |
| Jackson | 14 |
| Scott | 8 |
| Lafayette | 4 |
| Tallahatchie | 0 |
| Yazoo | 4 |
| Washington | 5 |
Showing top 20 counties by environmental activity. Mississippi has 83 counties total.
Cities with Environmental Records
Hattiesburg
13 facilities · 10 water systems
Columbus
13 facilities · 9 water systems
Jackson
13 facilities · 4 water systems
Meridian
12 facilities · 8 water systems
Laurel
10 facilities · 10 water systems
Gulfport
9 facilities · 10 water systems
Vicksburg
9 facilities · 6 water systems
Grenada
8 facilities · 9 water systems
Madison
8 facilities · 3 water systems
Iuka
7 facilities · 6 water systems
Pascagoula
7 facilities · 5 water systems
Olive Branch
7 facilities · 3 water systems
Tupelo
6 facilities · 4 water systems
Forest
5 facilities · 7 water systems
Brookhaven
5 facilities · 6 water systems
Greenville
5 facilities · 5 water systems
Ripley
5 facilities · 4 water systems
Waynesboro
5 facilities · 4 water systems
Natchez
5 facilities · 2 water systems
Moss Point
5 facilities · 1 water systems
Frequently Asked Questions
How many TRI facilities are in Mississippi? ▼
Mississippi has 383 facilities that report to the EPA Toxic Release Inventory (TRI). These facilities have collectively reported 269.4M lbs in total toxic chemical releases. TRI data is self-reported annually by facilities that manufacture, process, or use listed toxic chemicals above threshold amounts.
Does Mississippi have Superfund sites? ▼
Yes, Mississippi has 14 sites on the EPA Superfund National Priorities List (NPL). Superfund sites are contaminated locations identified for long-term cleanup under the EPA Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA).
What does EPA SDWIS list for drinking water in Mississippi? ▼
Mississippi has 989 EPA-regulated water systems in the Safe Drinking Water Information System (SDWIS) extract used here. 316 water systems have a health-based violation row (MCL exceedance) in this historical extract. A past registry row is not a current drinkability verdict. For current utility conditions, contact the local water utility or the Mississippi drinking water program. Source: EPA SDWIS.
What environmental data is available for Mississippi? ▼
PlainEnviro provides three categories of EPA environmental data for Mississippi: Toxic Release Inventory (TRI) data covering 383 industrial facilities, Safe Drinking Water Information System (SDWIS) data for 989 water systems, and Superfund National Priorities List (NPL) data for 14 contaminated sites.
How does Mississippi compare to other states on EPA disclosure counts? ▼
Mississippi has 383 TRI facilities with 269.4M lbs in total releases, 14 Superfund sites, and 2,079 water system violations on record. These are federal disclosure counts; they are not toxicity-weighted or population-adjusted risk scores. Source: EPA TRI, SDWIS, and Superfund NPL databases.
What is Mississippi's environmental health score? ▼
PlainEnviro's composite environmental health score for Mississippi is 54/100 (grade F). This score combines four percentile-benchmarked dimensions from EPA federal extracts: chemical release intensity per TRI facility, drinking-water health violation rate from SDWIS, Superfund site burden relative to industrial activity, and overall water violation rate. Scores are benchmarked against all 56 U.S. states and territories. When a dimension lacks data, its weight redistributes to the remaining dimensions so the score never deflates from missing inputs. This is a registry-count composite, not a clinical exposure or health-outcome assessment.
Explore More Data for Mississippi
TRI Facilities in Mississippi →
Every toxic-release facility reporting in the state, ranked by volume
Drinking Water Systems in Mississippi →
Community water systems and their violation records
Air Quality in Mississippi →
County-level AQI from EPA monitoring stations
Compare states by burden →
EJ screening scores for every U.S. county
State environmental rankings →
How states compare on releases, water and Superfund
Browse all states →
Environmental profiles for every U.S. state
About This Data
This page aggregates environmental data from three EPA programs for Mississippi: the Toxic Release Inventory (TRI) for industrial chemical releases, the Safe Drinking Water Information System (SDWIS) for water quality, and the Superfund National Priorities List (NPL) for hazardous waste cleanup sites.
PlainEnviro presents this data without advocacy framing. Numbers reflect reported data and may not capture all environmental activity. For specific health or environmental concerns, contact your state environmental agency.
What to do with Mississippi's data
Use this state profile as a starting point, then drill into the specific dataset that matters to you.
- Check the 383 TRI facilities reporting in Mississippi for the largest reported releases near a specific county. View facilities
- 316 water systems in the state have a recorded health-based violation, check if yours is one of them. Check water systems
- See how Mississippi compares to other states on releases, water violations, and Superfund sites. State rankings
Reported data reflects what facilities and agencies disclose to the EPA; it is not a complete measure of environmental risk or a substitute for local guidance.
Use and verify this record
Mississippi's profile brings together EPA release, drinking-water, and Superfund records. It reports the underlying programs without making a health or environmental-risk determination.
State environmental figures are computed directly from EPA data. The methodology records the joins, definitions, and refresh cadence for each program.
PlainEnviro renders public EPA records directly from its data pipeline; no figure on this page is typed in by an editor. See the editorial standards and corrections policy for how source changes and reported errors are handled.