South Dakota Contamination Data

State Contamination Profile

Low Risk Level14,627 documented sites
South Dakota ranks 43rd of 50 states by severity-weighted density — a screening measure of how much documented history sits in the federal record per square mile. That describes the record, not any single yard: the map shows where each documented site actually sits.

Total Sites

14,627

9 federal databases

Severity Density

0.34

Severity-weighted sites per sq mi

High-Severity Sites

170

Superfund NPL, PFAS detections + similar top-tier records

Data Sources

EPA, USGS

9 databases checked

High-severity counts the top severity tier of the record — the sites most worth checking distances against.

Source Breakdown

Nitrate: 9K
Underground Storage Tanks: 3K
Brownfields: 1K
Mining: 330
Toxic Release Inventory: 286
PFAS: 51
Superfund: 45
CAFO: 8

Top Counties in South Dakota

Minnehaha County carries South Dakota's densest documented record — 2.17 severity-weighted sites per square mile across 1,177 records, most commonly Underground Storage Tanks, including 8 high-severity sites. Density describes the county's record, not any single parcel.

Minnehaha

Sites

1K

Density

2.2

Source

Underground Storage Tanks

Lincoln

Sites

444

Density

1.4

Source

Nitrate

Union

Sites

281

Density

1.1

Source

Nitrate

Lawrence

Sites

448

Density

1.1

Source

Nitrate

Bon Homme

Sites

290

Density

1.0

Source

Nitrate

Yankton

Sites

307

Density

1.0

Source

Nitrate

Beadle

Sites

637

Density

0.9

Source

Nitrate

Clay

Sites

207

Density

0.9

Source

Nitrate

Campbell

Sites

334

Density

0.9

Source

Nitrate

Brookings

Sites

409

Density

0.9

Source

Nitrate

Agricultural Pesticide Use in South Dakota

In the 2019 federal survey estimates, South Dakota's most-applied agricultural pesticides statewide were Glyphosate, Acetochlor and Metolachlor & 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.

Check an Address in South Dakota

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What grows in South Dakota|National county rankings|Contamination map
EPA FRS CERCLIS•ArcGIS Online UST Finder•EPA FRS TRI•EPA FRS ACRES•EPA UCMR 5•USGS Water Quality Portal•EPA FRS NPDES•USGS MRDS•USGS NAWQA EPest