Worst Spots For Mosquitos: Where Metro Denver Ranks

DENVER, CO — Denver's metro area again finds itself on Orkin's "top 50 mosquito metros list," but a lot of residents across the United States have it worse than us.

Metro Denver is ranked 43rd on the list of areas across the country, based on the number of customers who made mosquito calls to Orkin from April 1, 2020, to March 31, 2021.

Planning to travel this summer? You may want to pack some bug spray. The No. 1 worst city for mosquitoes in the United States is Los Angeles, according to Orkin. The City of Angels unseated Atlanta, where Orkin is based, in the top spot after the Georgia capital held No. 1 for seven years in a row.

Atlanta did take the No. 2 spot in 2021, with Washington, D.C., Dallas and Chicago rounding out the top five.

Three cities — Seattle, San Diego and Fresno, California — broke into the top 50 after not being ranked in 2020.

Mosquitoes typically become active when temperatures are above 68 degrees Fahrenheit overnight, and breeding season can start as early as May and last through September.

Frank Meek, technical services manager for Rollins, Orkin’s parent company, said in a release that like many other insects, “mosquitoes need a food source, favorable temperatures and a proper breeding site to survive.”

“They are attracted to areas where humans and other animals are present, due to our body heat and the carbon dioxide we exhale,” Meek said.

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Mosquitoes can carry vector-borne diseases such as West Nile virus, Eastern Equine Encephalitis and Zika. These can be contracted by humans and pets.

Consider reducing or eliminating conditions that attract mosquitoes, and be sure to wear insect repellent to help protect yourself from bites. Things that attract mosquitoes include:

• Standing water in bird baths, fountains, potted plants, wading pools and other children’s toys.
• Debris in gutters that provides moisture and harborage.
• Overgrown shrubbery that affords dark, humid resting places.
• Torn or missing window and door screens.