Chicago Is the #2 Worst Mosquito City in America for 2026 — Here's What North Shore Homeowners Need to Do Right Now

You may have seen the headlines this week: Chicago just ranked #2 on Orkin's 2026 Mosquito Cities List, trailing only Los Angeles — and ahead of New York, Detroit, and Atlanta. That's not just a fun piece of trivia. It's a real signal that if you live in Lake Forest, Highland Park, Glencoe, Wilmette, or anywhere across the North Shore, the bugs are coming — and they're coming fast.

Here's what that ranking actually means, and what you should be doing about it right now.

What Is Orkin's Mosquito Cities List?

Every year, Orkin — one of the largest pest control companies in the country — analyzes data from their own residential treatment records to rank the U.S. cities with the most mosquito activity. The 2026 list, released on May 5th, is based on the number of new residential mosquito treatments performed across the country between March 2025 and March 2026. Chicago has now locked in a top-three position, and mosquito activity is actively expanding beyond traditional hotspots to reach more regions.

For context, here are the top five:

1. Los Angeles

2. Chicago

3. New York

4. Detroit

5. Atlanta

Mosquito Season on the North Shore Is Starting Right Now

In Illinois, mosquitoes become active when sustained air temperatures hold above 50°F and the soil begins to warm — typically in late April to early May across northern parts of the state. By mid-May, populations start building rapidly, especially after spring rains. The official peak is July through August, when West Nile Virus transmission risk is highest — but the homeowners who protect their yards before peak season are the ones who actually enjoy their outdoor spaces all summer long.

If you wait until July to treat, you've already lost months of your backyard to mosquitoes.

Why Organic Mosquito Control Is the Right Choice for North Shore Families

Conventional mosquito sprays rely on synthetic pyrethroids — harsh chemicals that work, but that also end up on your patio furniture, your kids' play structures, and your garden beds. Organic barrier treatments, like the cedar oil-based program offered by Evergreen Organic Mosquito Control, work differently.

Cedar oil blocks the scent receptors mosquitoes use to locate their prey, disrupting their entire sensory system. It's derived directly from cedar wood — completely natural — and once dry, it's safe for children, pets, and pollinators like bees and butterflies. Unlike some conventional products, organic cedar treatments carry no re-entry waiting period, so your family can go back outside within 30–60 minutes of an application.

What You Should Do This Week

1. Schedule your first treatment now, before populations peak. Treatments applied in early May are the most effective because they target mosquito populations before they've had a chance to breed and multiply.

2. Eliminate standing water on your property. Birdbaths, clogged gutters, decorative pots, low spots in the lawn, and even leaf debris can hold enough water to become breeding grounds. A female mosquito needs only about 1/4 inch of standing water to lay up to 300 eggs at a time.

   Chicago being the #2 mosquito city in the U.S. isn't going to change overnight. But your yard can be a protected sanctuary while the rest of the neighborhood is swatting. Contact Evergreen Organic Mosquito Control today for a free quote, and let's get your yard protected before the season really kicks in.