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2 Worcester Areas to Be Sprayed Tonight for Mosquitoes with West Nile Virus

By Patrick Sargent | September 3, 2019
Last Updated: February 2, 2021

For the third time in five weeks, the Plantation St./Hamilton St. area of Grafton Hill will be sprayed sometime after sunset and up until midnight. Additionally, the College Hill area near the Auburn town line will also be sprayed. 

See spray maps here

According to the Central Mass. Mosquito Control Project, mosquitoes with WNV were confirmed on Aug. 28 in the eastern and southern parts of Worcester. 

With assistance from the Worcester DPH, the Mosquito Control Project will use truck-mounted Ultra-Low volume spraying in these areas. 

The Mosquito Control Project reminds residents that the spraying can only reduce — not eliminate — the threat of mosquito-borne illness in the areas that are sprayed. 

Here are some spray precautions from the City of Worcester:

  • Close street facing windows and keep pets inside between sunset and midnight if possible to allow a more thorough application. This type of pesticide is similar to ones used for flea and tick control.
  • Remain inside during the application and for 15-20 minutes afterwards.
  • Accidental exposure is not expected to cause any health concerns in most people.
  • No precautions are needed the day after the application as all residues will have evaporated.
  • Residents with gardens are advised to wash off vegetables before consuming them.
  • There is no need to cover pools as the spray is an oil-based product and will dissipate quickly.
  • Any “outside air” controls on older window unit air conditioners should be turned off.

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