Measurements were made at various distances. At each measurement site, team members recorded their odor measurement, the distance from the odor source, temperature, wind speed, relative humidity and any written comments. The 250 scentometer and 907 nasal measurements were compared and found to be similar enough to be combined into a single set of measurements. The scentometer ranks were scaled prior to combining with nasal ranks. Scentometer odor ranks historically associated with the start of complaints.
Scentometer odor ranks historically associated with serious nuisance odors.
The two primary sources of odors were swine production facilities and land application of manure. The facilities included the houses, manure storage units and mortality disposal units. Distance Trends Odor intensity decreased as distance increased. There were also differences between the sources of odors. Statistical tests also revealed that while odor intensity was related to distance, other factors also affected odor intensity.