Manure air and water quality
Advice for managing manure while reducing air and water quality issues. Information about managing animals near shoreline. Best management practices for pathogen control in manure. OFFSET and MinnFARM tools for odor and runoff management.
Managing air and water quality with manure
- Managing water contamination
- How nitrogen, phosphorus and pathogens contribute to pollution
- Examples of pathogens found in manure
- Examples of human disease outbreaks caused by manure
- Main areas of focus for reducing pathogens
- Sources of nonpoint pollution in Minnesota
- Major agricultural pollutants
- BMPs to prevent nonpoint source pollution
- Regulations that apply
When discussing odor problems related to animal agriculture, the following questions often arise:
- How far does odor travel?
- Are animal numbers or animal species accurate predictors of nuisance odors?
- How much odor control is needed to solve an odor problem from an existing facility?
Answers to these questions are as varied as the people having the discussion. Until now, scientific methods to predict odor impacts did not exist. This tool, developed at the University of Minnesota, helps answer some of these questions.
- Odor from feedlots setback estimation tool (OFFSET)
- Or, use the metric version of OFFSET
- OFFSET user's guide and worksheet
The tool is the result of four years of extensive data collection and field testing. It is a simple tool designed to help answer the most basic questions about odor impacts from livestock and poultry facilities.
OFFSET is designed to estimate average odor impacts from a variety of animal facilities and manure storages. These estimations are useful for rural land use planners, farmers or citizens concerned about the odor impact of existing, expanding or new animal production sites.
OFFSET is based on odor measurements from Minnesota farms and Minnesota climatic conditions. As such, the use of OFFSET for estimating odor impacts in other geographic areas should be done with caution and through consultation with the authors of the tool.
The Minnesota Department of Agriculture (MDA) has teamed up with the National Weather Service to design a tool that helps farmers and commercial applicators determine the best time to apply manure. The Runoff Risk Advisory Forecast tool uses past and predicted National Weather Service weather data like precipitation, temperature, and snow melt. It predicts the likelihood that applied manure will run off fields in daily, next day, and 72 hour increments. Farmers and commercial applicators use an interactive map to locate their field and find the forecasted risk.