City Issues West Nile Virus Precautions Following Positive Tests
By TopHolding Editorial · Wednesday, September 16, 2026

The City of Naperville has detected West Nile Virus in its mosquito traps. Residents are encouraged to take protective measures against mosquitoes as the monitoring program continues.
The City of Naperville has issued a reminder to residents to take necessary precautions against mosquitoes following the identification of the West Nile Virus in recent laboratory tests. Out of the 10 traps used in the city's routine monitoring program, three have tested positive for the virus, prompting health warnings.
In response, the city is urging residents to follow the "Four D's" of defense: Drain standing water, Dress in protective clothing, Defend by using insect repellent, and Dusk/Dawn awareness, as these are the times when mosquitoes are most active. The city’s mosquito abatement program remains active, with staff continuing to monitor traps and treat areas where mosquito populations are high.
West Nile Virus is a seasonal concern, and while many individuals who contract the virus experience mild symptoms, some can develop more serious illnesses. The city's public health department advises anyone experiencing symptoms such as high fever, severe headache, or confusion to contact a healthcare provider promptly.
The monitoring program is a standard component of the city’s summer safety efforts. By maintaining these traps, officials can identify hotspots and adjust abatement activities as necessary. Residents can find more information about how to protect their properties on the city website.