Using GIS to Keep Unwanted Urban Critters in Check

Rodents, and rats in particular, are a persistent nuisance and potential health hazard in any urban area. If left uncontrolled, these critters multiply rapidly and wreak havoc on the environment they share with the larger human population. Communities must be proactive in keeping the rat population low.

The City of Park Ridge, IL sought an effective way to combat their growing population of rats. They called on Geographic Information Systems (GIS) to help with their efforts. GIS evaluated the locations in the city with the greatest number of rat complaints and sightings and the relation to paved/unpaved alleys. Using data collected over the past six years, numbers were mapped and a hot-spot analysis was performed. This analysis depicts locations on the city map in varying shades of color to show how dense or sparse rat populations are in a particular area based on the number of complaints received.

Drawing on this key data, the city’s health department determined which neighborhoods are most heavily affected by rats, and where and what number of bait boxes should be placed in sewers this spring. Due to GIS’s involvement in the project, the City of Park Ridge is confident they are targeting sectors with the greatest amount of rat activity and controlling the rising rodent population.