wimby What's in my backyard?

EPA-regulated facilities in Pennington County, SD

There are 1,138 EPA-regulated facilities inside Pennington County, South Dakota. The most common kinds are water discharge (612), hazardous waste (300), drinking water systems (159). 1 is currently in significant noncompliance, the EPA's designation for the most serious or persistent violations, and 9 have a violation on record. Penalties over the last five years total $5.3M across 3 sites.

Open the map of Pennington County

1,138facilities in the county
1in significant noncompliance
9with a violation on record
$5.3Min penalties, last 5 years

By category

CategoryFacilities
Hazardous waste300
Large quantity generators1
Small quantity generators190
Transporters1
Chemical (RMP/TRI)27
Superfund2
Air emissions136
Major sources17
Synthetic minor sources12
Minor sources88
Water discharge612
Major permits3
Minor permits399
Drinking water systems159
Greenhouse gas reporters5
Scrap yards4

A facility enrolled in several programs counts once in the total and once in each of its categories.

In significant noncompliance

The EPA's designation for its most serious or persistent violations, as of the latest data.

Largest penalties

Penalties assessed over the last five years.

Superfund sites

Towns in Pennington County

Bordering counties

Reading these numbers

These are regulatory records, not measurements of pollution. Most facilities appear because they hold a permit or file reports, and most of them are compliant; a listing is not a claim that a facility has polluted anything. Compliance status and penalties are the EPA's own determinations in data retrieved Oct 9, 2026. The Data page explains where each record comes from and how it can mislead.