The Air Management Practices Assessment Tool has put odor solutions at your finger tips.

IowaStateUniversity animal scientists and agronomists designed the Web tool to provide pork producers with information on air-quality issues involving animal housing, manure storage and land-application practices. The tool can be applied to other types of livestock, such as beef cattle.

Using the assessment tool is simple. First, you need to access the Web site at or you can go to the National Pork Board’s homepage at, then go to “Pork Science/Environment.” 

Once you have logged on to the site, you can select the emission that you want to investigate. This could include hydrogen sulfide, ammonia, dust (particulates) and odor. Simply click on the appropriate box. This will bring you to a page that outlines options that are available for each type of emission.

Within each type of gas, emission sources are categorized as liquid or solid manure. The charts will lead you to information on air-management practices as it relates to animal housing, manure storage and land application. Each option contains information on the practice, how the practice reduces or controls each emission, an effectiveness rating for the control and relative cost of applying the control practice. The cost includes everything from capital costs to per-head costs.

Here’s an example of how the Web site works.

You can choose permeable covers as a liquid-manure-storage practice to manage ammonia emissions. There’s a linked page that provides more information about permeable covers, including general features of the practices, pros and cons of implementing them and a list of resources for additional information.

The Web site contains only peer-reviewed data, points out Wendy Powers, IowaState animal scientist and the Web site’s co-author. She adds that the cost estimates and odor-reduction levels are conservative, but IowaState researchers have based the figures on published research, not company- or product-sponsored claims.

“Pork producers need strategies that are readily available to implement because we may see more air regulations come into place in the future,” says Powers. “This Web tool will allow them to see where they can potentially control odors in their current operation, or if they are planning to expand.”

So, exploring air-quality solutions is just a click away. This tool gives you another way to be proactive in improving the air quality in and around your operation.

Fact Sheets at a Glance

Listed below is a series of publications that Wendy Powers, IowaStateUniversity animal scientist, has authored. They are the foundation for IowaState’s Air Management Practices Assessment Tool.

  • Practices to Reduce Odor from Livestock Operations – PM 1970a (pdf) 
  • Practices to Reduce Ammonia Emissions from Livestock Operations – PM 1971a (pdf) 
  • Practices to Reduce Hydrogen Sulfide from Livestock Operations – PM 1972a (pdf) 
  • Practices to Reduce Dust and Particulates from Livestock Operations – PM 1973a (pdf) 

To order copies of these publications, call (515) 294-5247 or e-mail Use the publication reference number when ordering the fact sheets, which are available to producers at no charge.