EPA Air · violations by state and year

High-priority air violations in South Dakota, 2026

48Violations

A high-priority violation is the most serious class of Clean Air Act non-compliance an agency records against a source; a federally reportable violation is the next step down in severity. Every violation below was recorded against a source in South Dakota during 2026; one facility can appear more than once, because this is a record of what happened rather than a list of places.

Counties in South Dakota, 2026

South Dakota, other years

High-priority air violations recorded in South Dakota, 2026

Date	Facility	Where	Kind	Agency
2026-11-05	VALLEY QUEEN CHEESE FACTORY INC. — high-priority violation on file	MILBANK, Grant, SD	Earliest FRV determination	State
2026-11-04	WHARF RESOURCES INC - COEUR WHARF	LEAD, Lawrence, SD	Earliest FRV determination	State
2026-11-04	MAGELLAN PIPELINE COMPANY, LP - RAPID CITY TERMINAL	RAPID CITY, Pennington, SD	Earliest FRV determination	State
2026-10-22	PETE LIEN & SONS, INC. MAIN PLANT	RAPID CITY, Pennington, SD	Earliest FRV determination	State
2026-10-15	GLACIAL LAKES ENERGY LLC	WATERTOWN, Codington, SD	Earliest FRV determination	State
2026-09-25	HENKEL US OPERATIONS CORPORATION — high-priority violation on file	BRANDON, Minnehaha, SD	Earliest FRV determination	State
2026-09-24	DAKOTA KITCHEN AND BATH INC	SIOUX FALLS, Minnehaha, SD	Earliest FRV determination	State
2026-09-01	NORTHERN BORDER PIPELINE COMPANY - CLARK COMPRESSOR	CLARK, Clark, SD	Earliest FRV determination	State
2026-08-31	HURON ENERGY LLC, DBA GLACIAL LAKES ENERGY LLC — high-priority violation on file	HURON, Beadle, SD	Earliest FRV determination	State
2026-08-28	HUB CITY ENERGY, LLC — high-priority violation on file	ABERDEEN, Brown, SD	Earliest FRV determination	State
2026-08-28	ABERDEEN ENERGY, LLC — high-priority violation on file	MINA, Edmunds, SD	Earliest FRV determination	State
2026-08-26	POET BIOREFINING - BIG STONE, LLC	BIG STONE CITY, Grant, SD	Earliest FRV determination	State
2026-08-26	POET BIOREFINING - HUDSON, LLC	HUDSON, Lincoln, SD	Earliest FRV determination	State
2026-08-21	NORTH CENTRAL FOAM — high-priority violation on file	HURON, Beadle, SD	Earliest FRV determination	State
2026-08-21	UNIVERSITY OF SOUTH DAKOTA — high-priority violation on file	VERMILLION, Clay, SD	Earliest FRV determination	State
2026-08-12	OTTER TAIL POWER COMPANY	BIG STONE CITY, Grant, SD	Earliest FRV determination	State
2026-08-11	MAGELLAN PIPELINE COMPANY LP - SIOUX FALLS TERMINAL	SIOUX FALLS, Minnehaha, SD	Earliest FRV determination	State
2026-07-29	NORTHWESTERN ENERGY PUBLIC SERVICE CORPORATION - ABERDEEN	ABERDEEN, Brown, SD	Earliest FRV determination	State
2026-07-01	VALLEY QUEEN CHEESE FACTORY INC. — high-priority violation on file	MILBANK, Grant, SD	Earliest FRV determination	State
2026-06-30	WOODLAND CABINETRY — high-priority violation on file	SISSETON, Roberts, SD	Earliest FRV determination	State
2026-06-25	ABERDEEN ENERGY, LLC — high-priority violation on file	MINA, Edmunds, SD	Earliest FRV determination	State
2026-06-15	POET BIOPROCESSING - CHANCELLOR, LLC — high-priority violation on file	CHANCELLOR, Turner, SD	Earliest FRV determination	State
2026-06-15	POET RESEARCH CENTER - SCOTLAND — high-priority violation on file	SCOTLAND, Bon Homme, SD	Earliest FRV determination	State
2026-06-15	RED RIVER ENERGY, LLC — high-priority violation on file	ROSHOLT, Roberts, SD	Earliest FRV determination	State
2026-06-15	REDFIELD ENERGY LLC — high-priority violation on file	REDFIELD, Beadle, SD	Earliest FRV determination	State
2026-06-15	SOLVENTUM US LLC — high-priority violation on file	BROOKINGS, Brookings, SD	Earliest FRV determination	State
2026-06-15	VALERO RENEWABLE FUELS COMPANY LLC — high-priority violation on file	AURORA, Brookings, SD	Earliest FRV determination	State
2026-06-15	WOODLAND CABINETRY — high-priority violation on file	SISSETON, Roberts, SD	Earliest FRV determination	State
2026-06-10	HUB CITY ENERGY, LLC — high-priority violation on file	ABERDEEN, Brown, SD	Earliest FRV determination	State
2026-06-09	ABERDEEN ENERGY, LLC — high-priority violation on file	MINA, Edmunds, SD	Earliest FRV determination	State
2026-06-03	GCC DACOTAH — high-priority violation on file	RAPID CITY, Pennington, SD	Earliest FRV determination	State
2026-05-28	TRUSSBILT, LLC — high-priority violation on file	HURON, Beadle, SD	Earliest FRV determination	State
2026-05-28	REDFIELD ENERGY LLC — high-priority violation on file	REDFIELD, Beadle, SD	Earliest FRV determination	State
2026-05-11	CRETE READY FOAM LLC — high-priority violation on file	WESSINGTON SPRINGS, Jerauld, SD	Earliest FRV determination	State
2026-05-11	ABERDEEN ENERGY, LLC — high-priority violation on file	MINA, Edmunds, SD	Earliest FRV determination	State
2026-05-07	RING NECK ENERGY & FEED LLC — high-priority violation on file	ONIDA, Sully, SD	Earliest FRV determination	State
2026-05-06	3M COMPANY - ABERDEEN — high-priority violation on file	ABERDEEN, Brown, SD	Earliest FRV determination	State
2026-05-06	HUB CITY ENERGY, LLC — high-priority violation on file	ABERDEEN, Brown, SD	Earliest FRV determination	State
2026-05-06	ABERDEEN ENERGY, LLC — high-priority violation on file	MINA, Edmunds, SD	Earliest FRV determination	State
2026-05-06	NUGEN ENERGY LLC — high-priority violation on file	MARION, Turner, SD	Earliest FRV determination	State
2026-05-04	FORT PIERRE POWER AND LIGHT PLANT — high-priority violation on file	FORT PIERRE, Stanley, SD	Earliest FRV determination	State
2026-04-17	HUB CITY ENERGY, LLC — high-priority violation on file	ABERDEEN, Brown, SD	Earliest FRV determination	State
2026-04-17	HUB CITY ENERGY, LLC — high-priority violation on file	ABERDEEN, Brown, SD	Earliest FRV determination	State
2026-03-06	ABERDEEN ENERGY, LLC — high-priority violation on file	MINA, Edmunds, SD	Earliest FRV determination	State
2026-02-24	HUB CITY ENERGY, LLC — high-priority violation on file	ABERDEEN, Brown, SD	Earliest FRV determination	State
2026-02-10	HUB CITY ENERGY, LLC — high-priority violation on file	ABERDEEN, Brown, SD	Earliest FRV determination	State
2026-01-18	ABERDEEN ENERGY, LLC — high-priority violation on file	MINA, Edmunds, SD	Earliest FRV determination	State
2026-01-07	HENKEL US OPERATIONS CORPORATION — high-priority violation on file	BRANDON, Minnehaha, SD	Earliest FRV determination	State

Dates as filed by the agency that recorded the violation. Figures from EPA’s ICIS-AIR download.

What this page shows

This page covers Clean Air Act facilities in the EPA air register with violations in SD for 2026. It lists 35 violations recorded in 2026.