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Animal Feeding Operations In Iowa
Low-Res (*.pdf file) Size: 197KB       High-Res (*.pdf file) Size: 1,047KB

This map shows known animal feeding operations in Iowa above 200,000 lbs. live weight. They are broken out into permitted facilities – those with a construction permit; non-permitted facilities – those facilities required to submit a manure management plan exclusive of those with a construction permit; and registered open feedlots.

Animal Feeding Operations in Iowa and Groundwater Vulnerability - Aquifers and Wells
Low-Res (*.pdf file) Size: 231KB       High-Res (*.pdf file) Size: 4,437KB

The animal feeding operations are laid over groundwater vulnerability regions. The correspondence between the feeding operations and aquifers or wells is visible. The various background colors indicate the level of vulnerability to pollution from surface contaminants.

Animal Feeding Operations in Iowa and Groundwater Vulnerability - Special Areas
Low-Res (*.pdf file) Size: 223KB       High-Res (*.pdf file) Size: 1,137KB

Animal feeding operations are here shown against locations of sinkholes and agricultural drainage wells. Because sinkholes and drainage wells are more direct conduits to groundwater, surface pollutants may reach groundwater more rapidly and at higher concentrations.

Animal Feeding Operations in Iowa and Distribution of Reported Manure Spills
Low-Res (*.pdf file) Size: 223KB       High-Res (*.pdf file) Size: 1,135KB

The animal feeding operations are here shown in conjunction with human-caused spills. The spills are broken down by type, and manure spills for the 2000-2001 period are shown with circles of increasing size to indicate the number of spills at a location. The insets show a 3.5 mile radius around fishkill locations. These illustrate the relationship between AFOs, human-caused spills, and fishkills.

Animal Feeding Operations in Iowa and Impaired Waters (TMDL Program)
Low-Res (*.pdf file) Size: 269KB       High-Res (*.pdf file) Size: 3,841KB<

This map was designed to show the distribution of animal feeding operation and human-caused spills among impaired watersheds (as designated by the Total Daily Maximum Load program). A discussion of the watershed boundaries is included on the map.

Animal Confinements in Iowa by Number of Animal Units
Low-Res (*.pdf file) Size: 285KB

This image shows the locations of known confinement feeding operations by the size of operation measured in animal units. Animal units are determined by multiplying a factor times the number of animals. For example, the factor is 1 for beef cattle and immature dairy cattle, so a confinement with 500 beef cattle would have 500 animal units. The factor is 0.4 for swine that weigh more than 55 pounds, so a confinement with 4,000 finishing swine would have 1600 animal units. Turkeys weighing less than 7 pounds have a factor of 0.0085, so 100,000 turkeys would have 850 animal units.

Animal Feeding Operations in Iowa and Reported Fish Kills Attributed to Human Causes
Low-Res (*.pdf file) Size: 257KB       High-Res (*.pdf file) Size: 2,596KB

In this map, the distribution of AFOs and fishkills is shown on the largest map with a 3.5 mile radius around human-caused fishkills. The percentage of the total number of fish killed between January 1981 and November 2001 attributed to certain causes is broken out in an inset. According to records kept by the DNR, the number of fish killed for the stated period as a result of manure spills is far higher than any other category (61%).

Non-Permitted Animal Feeding Operations in Iowa
Low-Res (*.pdf file) Size: 284KB

This image shows the locations of known animal feeding operations required to submit manure management plans to the DNR, exclusive of permitted operations. A confinement is required to submit a manure management plan if it has a live weight over 200,000 pounds. The data is current as of December, 2001.

Permitted Animal Feeding Operations in Iowa
Low-Res (*.pdf file) Size: 232KB

In this image, the locations of those animal feeding operations requiring a permit are shown. Facilities requiring a permit are those with certain waste control structures, and those over a designated live weight. The data is current as of April 2001.

Registered Feedlots in Iowa
Low-Res (*.pdf file) Size: 241KB

Those feedlots registered with the DNR are shown here. To date, this has been a voluntary process, so the distribution does not reflect the complete distribution of feedlots. The data is current as of June 2001.