Governing Law and Regulations
Iowa Department of Natural Resources (DNR) Environmental Services Division Air Quality Bureau
Linn County Public Health Department Air Quality Division
Polk County Public Works Air Quality Division
See ADDRESSES & CONTACTS for addresses and telephone numbers.
See national section for basic information and federal regulations.
Comparison: State vs. Federal
• Rules. Iowa does not regulate any hazardous air pollutants (HAPs) in addition to the federally listed pollutants. Iowa has adopted by reference most of the federal NESHAP rules, including the source-specific NESHAPs, also known as maximum achievable control technology (MACT) standards. DNR periodically updates its adoption of the federal standards to include newly promulgated NESHAPs applicable to sources in the state. Major sources of HAPs that are not included in a source category specifically covered by the federal standards must make MACT determinations on a case-by-case basis. For further information, see the national section HAZARDOUS AIR POLLUTANTS.
• Administration and enforcement. DNR administers and enforces the NESHAP rules in Iowa, while EPA administers and enforces those NESHAP rules not adopted by DNR on a case-by-case basis. The local air quality agencies are responsible for implementing and enforcing the federal and state requirements within their jurisdictions, as well as any local regulatory requirements.