EPA Air · violations by state and year

High-priority air violations in Iowa, 2026

78Violations

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 Iowa 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 Iowa, 2026

Iowa, other years

High-priority air violations recorded in Iowa, 2026

Date	Facility	Where	Kind	Agency
2026-11-04	POET BIOREFINING - LIBERTY (EMMETSBURG) — high-priority violation on file	EMMETSBURG, Palo Alto, IA	Earliest FRV determination	State
2026-11-03	JBS USA LLC — high-priority violation on file	MARSHALLTOWN, Marshall, IA	Earliest FRV determination	State
2026-10-26	CARGILL INC-SIOUX CITY — high-priority violation on file	SIOUX CITY, Woodbury, IA	Earliest FRV determination	State
2026-10-13	GEORGIA-PACIFIC GYPSUM LLC	FORT DODGE, Webster, IA	Earliest FRV determination	State
2026-10-01	POET BIOREFINING CORNING — high-priority violation on file	CORNING, Adams, IA	Earliest FRV determination	State
2026-09-28	ALGONA MUNICIPAL UTILITIES	ALGONA, Kossuth, IA	Earliest FRV determination	State
2026-09-22	POET BIOREFINING CORNING — high-priority violation on file	CORNING, Adams, IA	Earliest FRV determination	State
2026-09-10	JRS PHARMA LP - MCCII	CEDAR RAPIDS, Linn, IA	Earliest FRV determination	Local
2026-09-09	HOMELAND ENERGY SOLUTIONS LLC — high-priority violation on file	LAWLER, Chickasaw, IA	Earliest FRV determination	State
2026-09-08	POET BIOREFINING IOWA FALLS, LLC — high-priority violation on file	IOWA FALLS, Hardin, IA	Earliest FRV determination	State
2026-09-08	POET BIOREFINING IOWA FALLS, LLC — high-priority violation on file	IOWA FALLS, Hardin, IA	Earliest FRV determination	State
2026-08-25	ABSOLUTE ENERGY LLC-SAINT ANSGAR (MONA)	SAINT ANSGAR, Mitchell, IA	Earliest FRV determination	State
2026-08-25	ABSOLUTE ENERGY LLC-SAINT ANSGAR (MONA)	SAINT ANSGAR, Mitchell, IA	Earliest FRV determination	State
2026-08-24	POET BIOREFINING - JEWELL	JEWELL, Hamilton, IA	Earliest FRV determination	State
2026-08-20	HYCAST FOUNDRY — high-priority violation on file	FAIRFIELD, Jefferson, IA	HPV day-zero determination	State
2026-08-19	CITY OF ONAWA-WASTEWATER TREATMENT PLANT — high-priority violation on file	ONAWA, Monona, IA	Earliest FRV determination	State
2026-08-17	CARGILL INC-SIOUX CITY — high-priority violation on file	SIOUX CITY, Woodbury, IA	Earliest FRV determination	State
2026-08-14	CARGILL INC-FORT DODGE — high-priority violation on file	FORT DODGE, Webster, IA	Earliest FRV determination	State
2026-08-11	POET BIOREFINING CORNING — high-priority violation on file	CORNING, Adams, IA	Earliest FRV determination	State
2026-08-10	THE ANDERSONS MARATHON HOLDINGS LLC — high-priority violation on file	DENISON, Crawford, IA	Earliest FRV determination	State
2026-07-30	POET BIOREFINING IOWA FALLS, LLC — high-priority violation on file	IOWA FALLS, Hardin, IA	Earliest FRV determination	State
2026-07-29	MID AMERICAN ENERGY CO-SALIX — high-priority violation on file	SALIX, Woodbury, IA	Earliest FRV determination	State
2026-07-27	LOESS HILLS REGIONAL SANITARY LANDFILL — high-priority violation on file	MALVERN, Mills, IA	Earliest FRV determination	State
2026-07-27	HNI CORP-CENTRAL CAMPUS-OAK STREET STEEL — high-priority violation on file	MUSCATINE, Muscatine, IA	Earliest FRV determination	State
2026-07-27	HNI CORP-NORTH CAMPUS-ALLSTEEL COMPONENT — high-priority violation on file	MUSCATINE, Muscatine, IA	Earliest FRV determination	State
2026-07-27	CNH AMERICA LLC — high-priority violation on file	BURLINGTON, Des Moines, IA	Earliest FRV determination	State
2026-07-27	WB SCOTT AREA LLC — high-priority violation on file	DAVENPORT, Scott, IA	Earliest FRV determination	State
2026-07-27	VALERO RENEWABLE FUELS CO LLC-HARTLEY — high-priority violation on file	HARTLEY, O'Brien, IA	Earliest FRV determination	State
2026-07-27	PRINCIPAL LIFE INSURANCE COMPANY — high-priority violation on file	DES MOINES, Polk, IA	Earliest FRV determination	State
2026-07-27	PELLA WEST SUBSTATION — high-priority violation on file	PELLA, Marion, IA	Earliest FRV determination	State
2026-07-27	WEST BRANCH RNG — high-priority violation on file	MAURICE, Sioux, IA	Earliest FRV determination	State
2026-07-26	KNIFE RIVER MIDWEST LLC-SIOUX CITY-PLT#4 — high-priority violation on file	SIOUX CITY, Woodbury, IA	Earliest FRV determination	State
2026-07-23	ZINPRO CORP - GARNER — high-priority violation on file	GARNER, Hancock, IA	Earliest FRV determination	State
2026-07-20	CARGILL ANIMAL NUTRITION - SIOUX CITY — high-priority violation on file	SIOUX CITY, Woodbury, IA	Earliest FRV determination	State
2026-07-13	CARGILL INC-SIOUX CITY — high-priority violation on file	SIOUX CITY, Woodbury, IA	Earliest FRV determination	State
2026-07-08	CARGILL INC-SIOUX CITY — high-priority violation on file	SIOUX CITY, Woodbury, IA	Earliest FRV determination	State
2026-07-07	POET BIOREFINING - LIBERTY (EMMETSBURG) — high-priority violation on file	EMMETSBURG, Palo Alto, IA	Earliest FRV determination	State
2026-07-07	HYCAST FOUNDRY — high-priority violation on file	FAIRFIELD, Jefferson, IA	HPV day-zero determination	State
2026-06-22	VERBIO — high-priority violation on file	NEVADA, Story, IA	Earliest FRV determination	State
2026-06-22	HOMELAND ENERGY SOLUTIONS LLC — high-priority violation on file	LAWLER, Chickasaw, IA	Earliest FRV determination	State
2026-06-20	MASTERBRAND CABINETS - WATERLOO OPERATIONS — high-priority violation on file	WATERLOO, Black Hawk, IA	Earliest FRV determination	State
2026-06-15	SSAB IOWA INC — high-priority violation on file	MUSCATINE, Muscatine, IA	HPV day-zero determination	State
2026-06-06	HYCAST FOUNDRY — high-priority violation on file	FAIRFIELD, Jefferson, IA	HPV day-zero determination	State
2026-06-05	SEABOARD TRIUMPH FOODS, LLC — high-priority violation on file	CITY OF SIOUX CITY, Woodbury, IA	Earliest FRV determination	State
2026-05-28	GENERAL MILLS OPERATIONS, INC. — high-priority violation on file	CEDAR RAPIDS, Linn, IA	Earliest FRV determination	Local
2026-05-19	HYCAST FOUNDRY — high-priority violation on file	FAIRFIELD, Jefferson, IA	Earliest FRV determination	State
2026-05-13	HEIDELBERG MATERIALS US CEMENT LLC — high-priority violation on file	MASON CITY, Cerro Gordo, IA	HPV day-zero determination	State
2026-05-07	PARKER WELDING & FABRICATION INC — high-priority violation on file	WINTERSET (HISTORICAL), Madison, IA	Earliest FRV determination	State
2026-05-04	JBS USA LLC — high-priority violation on file	MARSHALLTOWN, Marshall, IA	Earliest FRV determination	State
2026-05-04	CDI LLC - CHARLES CITY — high-priority violation on file	CHARLES CITY, Floyd, IA	Earliest FRV determination	State
2026-05-04	CDI LLC - FOREST CITY — high-priority violation on file	FOREST CITY, Winnebago, IA	Earliest FRV determination	State
2026-05-04	CITY OF SHENANDOAH-SHENANDOAH SANITATION — high-priority violation on file	SHENANDOAH, Page, IA	Earliest FRV determination	State
2026-04-27	MID AMERICAN ENERGY CO-SALIX — high-priority violation on file	SALIX, Woodbury, IA	Earliest FRV determination	State
2026-04-21	METRO PARK EAST LANDFILL — high-priority violation on file	MITCHELLVILLE, Polk, IA	Earliest FRV determination	State
2026-04-21	POET BIOREFINING - GOWRIE, LLC — high-priority violation on file	GOWRIE, Webster, IA	Earliest FRV determination	State
2026-04-21	INDIAN MOTORCYCLE LLC — high-priority violation on file	SPIRIT LAKE, Dickinson, IA	Earliest FRV determination	State
2026-04-13	GOLDEN GRAIN ENERGY LLC — high-priority violation on file	MASON CITY, Cerro Gordo, IA	Earliest FRV determination	State
2026-04-01	JBS USA LLC — high-priority violation on file	MARSHALLTOWN, Marshall, IA	Earliest FRV determination	State
2026-03-31	STINE ATP — high-priority violation on file	REDFIELD, Dallas, IA	Earliest FRV determination	State
2026-03-27	3M MINNESOTA MINING & MANUFACTURING CO — high-priority violation on file	KNOXVILLE, Marion, IA	Earliest FRV determination	State
2026-03-16	VERBIO — high-priority violation on file	NEVADA, Story, IA	Earliest FRV determination	State
2026-03-11	LSCP LP DBA LITTLE SIOUX CORN PROCESSORS — high-priority violation on file	MARCUS, Cherokee, IA	Earliest FRV determination	State
2026-03-04	SEABOARD TRIUMPH FOODS, LLC — high-priority violation on file	CITY OF SIOUX CITY, Woodbury, IA	Earliest FRV determination	State
2026-03-02	POET BIOREFINING - ARTHUR, LLC — high-priority violation on file	ARTHUR, Ida, IA	Earliest FRV determination	State
2026-02-25	CLIMAX MOLYBDENUM CO — high-priority violation on file	FORT MADISON, Lee, IA	Earliest FRV determination	State
2026-02-23	ROQUETTE AMERICA INC — high-priority violation on file	KEOKUK, Lee, IA	HPV day-zero determination	State
2026-02-20	STRAWBERRY POINT UTILITIES — high-priority violation on file	STRAWBERRY POINT, Clayton, IA	Earliest FRV determination	State
2026-02-18	HEIDELBERG MATERIALS US CEMENT LLC — high-priority violation on file	MASON CITY, Cerro Gordo, IA	HPV day-zero determination	U.S. EPA
2026-02-13	OSMIUM DATA CENTER — high-priority violation on file	WEST DES MOINES, Warren, IA	Earliest FRV determination	State
2026-02-11	GROWMARK INC - FORT DODGE TERMINAL — high-priority violation on file	DUNCOMBE, Webster, IA	Earliest FRV determination	State
2026-02-03	HEIDELBERG MATERIALS US CEMENT LLC — high-priority violation on file	MASON CITY, Cerro Gordo, IA	HPV day-zero determination	State
2026-02-02	GRAETTINGER MUNICIPAL LIGHT PLANT — high-priority violation on file	GRAETTINGER, Palo Alto, IA	Earliest FRV determination	State
2026-01-27	GRAIN PROCESSING CORP — high-priority violation on file	MUSCATINE, Muscatine, IA	Earliest FRV determination	State
2026-01-27	DANISCO US, INC. — high-priority violation on file	CEDAR RAPIDS, Linn, IA	Earliest FRV determination	Local
2026-01-12	ROQUETTE AMERICA INC — high-priority violation on file	KEOKUK, Lee, IA	Earliest FRV determination	State
2026-01-06	CARGILL INC-SIOUX CITY — high-priority violation on file	SIOUX CITY, Woodbury, IA	Earliest FRV determination	State
2026-01-02	HYCAST FOUNDRY — high-priority violation on file	FAIRFIELD, Jefferson, IA	HPV day-zero determination	State
2026-01-01	GRAIN PROCESSING CORP — high-priority violation on file	MUSCATINE, Muscatine, IA	HPV day-zero 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 IA for 2026. It lists 64 violations recorded in 2026.