Why North Shore Mosquito Control Matters in 2026
West Nile virus has returned to Chicago's North Shore. Learn how mosquitoes spread the virus and what homeowners can do to reduce risk.
5/8/20261 min read
Last summer, the North Shore Mosquito Abatement District recorded the highest West Nile virus infection rate in its 20-year history — 6.5% of trapped mosquitoes tested positive, surpassing the previous record of 5.9% set during the 2012 outbreak. And 2026 isn't looking any easier: infection rates across Chicagoland are already elevated compared to the same period in recent years.
What this means for your backyard:
West Nile peaks in July and August — but the mosquitoes carrying it start reproducing now, in May. Treating your property organically in spring is the most effective way to reduce the mosquito population before peak virus season hits.
Symptoms of West Nile to watch for:
Fever, headache, body aches
Nausea or vomiting
Rash
Most cases are mild, but roughly 1 in 150 infected people develop serious neurological illness. The North Shore Mosquito Abatement District's own director stated last summer: "If you are ever going to protect yourself from mosquitoes, now is the time."
Evergreen Mosquito treats your yard proactively — so you can enjoy summer without worrying about what's biting you.
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