Washington, D.C., has been ranked as the third-most pest-infested city in America based on the population of both cockroaches and rats. The nation’s capital has an average of 348.6 rat and 228.5 cockroach sightings per year, according to U.S. census data from 2021. This makes the combined sighting rate 83.7 per 100,000 residents, according to […]