Free Mosquito Spraying Continues in Blackstone and Millville—How to Prepare & Opt Out
Mosquito Spraying in Blackstone and Millville: August Schedule and Info
Free mosquito spraying in Blackstone and Millville will continue every Monday evening in August, weather permitting. Spraying is handled by the Central Massachusetts Mosquito Control Project (CMMCP), which provides mosquito control services to member communities like ours.
As of July 23, Massachusetts has confirmed 27 positive mosquito samples for West Nile virus (WNV), including the earliest detected case on June 13 and the latest on July 18 in Marlborough and Worcester, as well as one confirmed animal case of WNV. Additionally, one mosquito sample tested positive for Eastern Equine Encephalitis (EEE) in Belchertown (Hampshire County) on July 21. While no human or additional animal cases of EEE have been reported in 2025 yet, the disease is rare but serious and potentially fatal.
When and Where Spraying Happens
Spraying is scheduled for Monday evenings after sunset, depending on weather and mosquito activity.
Although CMMCP updates its tentative spray list daily, residents of Blackstone and Millville should check the list between 1:00 PM and 3:00 PM on Mondays to see if their street is included that night.
Spray routes are determined by mosquito trap data, public requests, and current risk levels.
How to Request Mosquito Spraying
As a Blackstone and Millville resident, you can request free mosquito spraying for your property using the form with CMMCP. Requests must be submitted by 3:00 PM on the day of scheduled spraying to be considered for that evening.
Other services by CMMCP you can take advantage includes:
- Abandoned Swimming Pool Treatments
- Ditch Maintenance Inspections
- Beaver Mitigation Request
- Educational Program Request
What Products Are Used?
CMMCP uses EPA-registered pesticides that are applied in ultra-low volume (ULV) to minimize exposure while effectively targeting adult mosquitoes.
The primary product used for truck-mounted spraying is Anvil 10+10 which contains Zenivex® E4 (etofenprox) (a synthetic version of a natural pesticide found in chrysanthemum flowers). It is sprayed from the truck at 4.5-9.0 ounces per minute. This presents a minimal risk to humans, pets and non-target species. Etofenprox presents a low toxicity to birds and dried foliar residues are not harmful to honeybees.
Other larvicide and ground treatment products are used in specific circumstances, but Anvil 10+10 is the main product for wide-area spraying.
For full product names, ingredients, and safety data, check out CMMCP: Products We Use.
How to Prepare Before and After Spraying
If your neighborhood is on the spray list, take the following steps to minimize exposure and keep animals and people safe:
Before Spraying:
- Close windows and doors
- Bring pets indoors
- Cover or bring in pet bowls, toys, laundry, and grills
After Spraying:
- Resume outdoor activity after 15–30 minutes
- Rinse off any surfaces like furniture, toys, or garden produce
Learn more in CMMCP’s guidance:
What to Do Before/After Spraying
How to Opt Out of Mosquito Spraying
Some residents choose to opt out of spraying for personal, environmental, or health reasons. Common reasons include:
- Protecting pollinators like bees
- Organic farming or gardening
- Health sensitivities
- Keeping birds or livestock
Massachusetts allows you to file a no-spray request for your property each year. If approved, CMMCP will exclude your address from truck-based spraying.
To learn more about who can opt out, how to file, and what signs are required, read Our Opt-Out Guide.
August 2025 Spray Calendar
CMMCP plans to spray in Blackstone and Millville every Monday evening throughout August 2025, weather permitting.
Don’t forget: Check the tentative spray list between 1–3 PM every Monday. The link will be updated daily.
Why It Matters
Mosquito-borne illnesses like West Nile virus (WNV) and Eastern Equine Encephalitis (EEE) pose significant health risks in Massachusetts. With 27 WNV-positive mosquito samples and one animal case already confirmed this season as of July 18, along with the recent detection of EEE in mosquitoes, protecting yourself and your family is critical.
Both viruses are transmitted through mosquito bites, and while infections are uncommon, they can lead to severe illness or death. Continued mosquito control, including spraying and reducing breeding sites, helps reduce the risk.
Staying proactive with spraying, yard maintenance, and repellents helps protect our community.
West Nile Virus Detected: What You Should Know
Recap: June Mosquito Spraying in Blackstone & Millville
At Small Town Post, we believe local news should be clear, helpful, and rooted in community. Whether it’s mosquito spraying in Blackstone and Millville or celebrating the everyday people who make our towns special, we’re here to keep you informed, engaged, and empowered. Have a local tip, story, or event to share? Reach out—we’d love to hear from you. Follow us on Facebook for the latest updates and alerts: facebook.com/smalltownpost
Together, let’s keep our community strong, connected, and thriving.
