State agencies are responsible for implementing laws passed by the Iowa General Assembly. The Department of Natural Resources writes rules to implement the laws. Expand the tab for help finding specific sections of administrative rules or laws governing animal feeding operations.
The Iowa Administrative Code (IAC) includes all rules written by state agencies, including the Iowa Department of Natural Resources or DNR. These rules are written to administer state laws. Rules for animal feeding operations are found in Chapter 65 under the Environmental Protection Commission (agency identification number 567). There are also a few rules applicable to animal feeding operations located in 567 IAC Chapters 32, 60, 61, 63 and 64.
To view current rules:
- Go to the Iowa Administrative Code website under the Environmental Protection Commission  listing.
- Click on the rules, PDF or RTF tabs in the right-hand column under the appropriate chapter or use this direct link to 567 IAC Chapter 65.
- 567 IAC Chapter 65 is broken down into specific sections, such as definitions, manure management plan requirements, manure applicator certification, construction requirements for open feedlots, etc. Sections 567 IAC 65.1 through 567 IAC 65.22 pertain to confinement feeding operations. Sections 567 IAC 65.100 through 567 IAC 65.114 pertain to open feedlots. For truck washes, see sections 567 IAC 65.200 through 567 IAC 65.210.
The Iowa Code includes all laws passed by the Iowa General Assembly. To find a specific section of Iowa Code relating to animal feeding operations:
- Iowa Code, Applicable chapters include:
- Chapter 459 -- Animal Agriculture and Compliance Act
- Chapter 459A -- Animal Agriculture and Compliance Act for Open Feedlot Operations
- Chapter 459B -- Dry Bedded Confinement Feeding Operations
- Click on the rules, PDF or RTF tabs in the right-hand column under the appropriate chapter.
As authorized by the Clean Water Act, the National Pollutant Discharge Elimination System (NPDES) permit program controls water pollution by regulating point sources that discharge pollutants into waters of the United States. This program includes the U.S. Environmental Protection Agency's (EPA) Concentrated Animal Feeding Operations (CAFO) rule.
In Iowa, EPA delegates enforcement of the NPDES program to the DNR. The DNR's NPDES section issues NPDES permits and storm water permits to animal feeding operations and provides technical assistance to animal feeding operation owners and operators.
The EPA rules and rule history are available on its