First West Nile Virus Mosquito Detected in MA – Are You at Risk?

West Nile Virus Found in Massachusetts: What Blackstone & Millville Should Know

The Massachusetts Department of Public Health has announced the first mosquito to test positive for West Nile Virus (WNV) in 2025, collected in Norfolk County. While Blackstone and Millville are not in the affected area and remain at low risk for both WNV and EEE (Eastern Equine Encephalitis), this early-season detection is a reminder to stay mosquito-smart this summer.

Find local risk levels for Eastern Equine Encephalitis (EEE) and West Nile Virus (WNV) based on seasonal testing from June to October.

Local Spraying Still Ongoing — You Can Request It

The Central Massachusetts Mosquito Control Project (CMMCP) is still spraying in our area this June and July. These evening sprays are done every Monday for Blackstone and Millville.

Residents can request mosquito control services directly:

👉 Submit a spray request online
📞 Or call CMMCP at 508-393-3055 Monday–Friday, 7:00 AM – 3:30 PM

Check out our related article here: Protect Your Yard: Mosquito Spraying Dates Announced

July 2025 released tentative spray schedule by CMMCP

How to Prevent Mosquito Bites and Reduce Risk

While local spraying helps reduce mosquito populations, it’s not guaranteed to cover every area or date—and spray schedules are only confirmed through July so far.

That’s why it’s important to take additional steps around your home and yard to prevent mosquito bites and reduce your risk of West Nile Virus and other mosquito-borne illnesses.

Here are some prevention tips recommended by the Massachusetts Department of Public Health:

• Use EPA-registered repellents with DEET, picaridin, IR3535, or oil of lemon eucalyptus.
• Dump or drain standing water in buckets, flowerpots, toys, birdbaths, and anything that collects rain.
• Check and repair window and door screens to keep mosquitoes out of your home.
• Wear long sleeves and pants, especially from dusk to dawn when mosquitoes are most active.
• Use mosquito netting over strollers, playpens, and outdoor sitting areas as needed.

Why It Matters Now

Although the first infected mosquito was found far from the Blackstone Valley, West Nile Virus tends to spread across Massachusetts as the summer heats up—especially after heavy rains and during warm, humid weather.

Staying alert now means fewer bites and less risk later.

If you haven’t yet requested a mosquito spray for your home—or checked your yard for water buildup—now is a great time to act.

📌 Want to learn more about local spraying?

📖 Read our June Mosquito Spraying Guide for Blackstone & Millville