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The Iowa Department of Natural Resources

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Animal Feeding Operations

Iowa has two types of DNR-regulated animal feeding operations (AFOs): confinements and open feedlots. Both AFO types are confined (kept and fed for 45 days or more per year) in a lot, yard, corral, building or other area. Both types include manure storage structures, but do not include livestock markets.

confinement feeding operation:
A confinement feeding operation (above) confines animals to areas that are totally roofed. Confinement feeding operations in Iowa must retain all manure.

open feedlot:
An open feedlot is unroofed or partially roofed with no vegetation or residue ground cover while the animals are confined. Large open feedlots with a national pollutant discharge elimination system (NPDES) permit are allowed to discharge to a water of the state under certain conditions listed in the permit, such as during a storm event larger than the 25-year, 24-hour storm.

A combined operation has some animals in a confinement and some in an open feedlot.

Data and Resources

FieldValue
Publisher
Modified
2020-11-06
Release Date
2017-07-21
Frequency
Daily
Identifier
90eda41a-d8f6-47d1-ab36-e4bdf80a2bb1
Spatial / Geographical Coverage Area
POLYGON ((-96.712646484375 40.296286517117, -96.712646484375 43.564471587218, -90.076904296875 43.564471587218, -90.076904296875 40.296286517117))
Spatial / Geographical Coverage Location
Iowa
License
Author
Iowa DNR
Contact Name
Hruby, Claire
Contact Email
Public Access Level
Public