Everything you need to get started. Guides, instructions and useful links.

Iowa Department of Natural Resources (DNR)

• Iowa DNR Air Quality Homepage
• Iowa DNR Emission Inventory General Website
• Iowa DNR MSEI Webpage

Guides and Instructions

• Iowa DNR Instruction Booklet
• MSEI Exemptions
• Minor Source Emission Inventory Tips
• Iowa DNR MSEI Tools and Examples
• Iowa DNR MSEI FAQ´s
• Iowa DNR Tips for Hiring an Environmental Consultant

State & Local Emissions Inventory System (SLEIS)

• State & Local Emissions Inventory System (SLEIS)
• SLEIS Tutorials
• SLEIS Module-Specific Instructions

Frequently Used Links

Construction Permits

• Iowa DNR Construction Permits
• Polk County Permits
• Linn County Permits

Emission Estimation

• AP-42 Emission Factors
• WebFIRE Emission Factors
• Iowa DNR Document DNA
  User ID: airquality | Password: iowadnr1
• Iowa DNR Document Search

Other

• Standard Industrial Classification (SIC) Codes
• North American Industrial Classification (NAICS) Codes
• Source Classification Code (SCC) List (Excel)
• Hazardous Air Pollutants
• Conversions and Abbreviations

Environmental Protection Agency (EPA) National Emissions Inventory

• EPA's National Emissions Inventory (NEI) Trends Data
• EPA's National Emissions Inventory (NEI) Emissions Data
• EPA's Air Emissions Sources Where You Live