Total Sites
20,263
9 federal databases
Severity Density
0.62
Severity-weighted sites per sq mi
High-Severity Sites
260
Superfund NPL, PFAS detections + similar top-tier records
Data Sources
EPA, USGS
9 databases checked
Source Breakdown
Top Counties in Mississippi
Harrison County carries Mississippi's densest documented record — 3.32 severity-weighted sites per square mile across 1,322 records, most commonly Underground Storage Tanks, including 20 high-severity sites. Density describes the county's record, not any single parcel.
| County | Sites | Density | Dominant Source |
|---|---|---|---|
| Harrison | 1,322 | 3.32 | Underground Storage Tanks |
| Lee | 663 | 2.14 | Underground Storage Tanks |
| Jackson | 964 | 2.09 | Nitrate |
| Hinds | 1,347 | 2.08 | Underground Storage Tanks |
| Lamar | 424 | 1.50 | Nitrate |
| Forrest | 502 | 1.49 | Underground Storage Tanks |
| DeSoto | 499 | 1.45 | Underground Storage Tanks |
| Lauderdale | 673 | 1.28 | Underground Storage Tanks |
| Washington | 570 | 1.20 | Underground Storage Tanks |
| Lowndes | 414 | 1.13 | Underground Storage Tanks |
Harrison
Sites
1K
Density
3.3
Source
Underground Storage TanksLee
Sites
663
Density
2.1
Source
Underground Storage TanksJackson
Sites
964
Density
2.1
Source
NitrateHinds
Sites
1K
Density
2.1
Source
Underground Storage TanksLamar
Sites
424
Density
1.5
Source
NitrateForrest
Sites
502
Density
1.5
Source
Underground Storage TanksDeSoto
Sites
499
Density
1.5
Source
Underground Storage TanksLauderdale
Sites
673
Density
1.3
Source
Underground Storage TanksWashington
Sites
570
Density
1.2
Source
Underground Storage TanksLowndes
Sites
414
Density
1.1
Source
Underground Storage TanksAgricultural Pesticide Use in Mississippi
In the 2019 federal survey estimates, Mississippi's most-applied agricultural pesticides statewide were Glyphosate, Metolachlor & Metolachlor-S and Metolachlor-S. These estimates describe agricultural land use across the state — context for what's in use around the region, not a reading on any garden's soil.
Pesticide data: USGS NAWQA Pesticide National Synthesis Project (EPest county-level use estimates). Latest available county estimates: 2019.
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