EPA-regulated facilities in Custer County, SD

There are 144 EPA-regulated facilities inside Custer County, South Dakota. The most common kinds are drinking water systems (53), water discharge (52), hazardous waste (25). None is in significant noncompliance, but 3 have a violation on record. Penalties over the last five years total $13k across 1 site.

Open the map of Custer County

144facilities in the county

0in significant noncompliance

3with a violation on record

$13kin penalties, last 5 years

By category

Category	Facilities
Hazardous waste	25
Small quantity generators	14
Chemical (RMP/TRI)	1
Superfund	3
Air emissions	16
Synthetic minor sources	1
Minor sources	8
Water discharge	52
Minor permits	46
Drinking water systems	53

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

Largest penalties

Penalties assessed over the last five years.

HERMOSA - TOWN OF PO BOX 298, HERMOSA, SD, 57744 $13k in penalties

Superfund sites

SPOKANE MUNITIONS R6E,T25,SW1/4,SEC26, SPOKANE, SD, 57730
USDA USFS R02 BLACK HILLS NF: CUSTER RANGER DISTRICT 647 NORTH 3RD ST., CUSTER, SD, 57730
BLACK HILLS NATIONAL FOREST MINING DISTRICT 647 N 3RD ST, CUSTER, SD, 57730

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.