Mosquito Control and Protection

-A A +A


About Our Provider                  Legal Notices from our Provider

How to Protect Yourself from Diseases Transmitted by Mosquitos

Waltham Partners with:  The East Middlesex Mosquito Control Project


Questions on pesticide applications by the East Middlesex Mosquito Control Project can be answered by calling 781-899-5730. Questions on the exclusion process, which is based on regulation 333 CMR:13:04 of the Massachusetts Pesticide Board, can be answered by calling 617-626-1784.

Waltham residents who would like to exclude their property from mosquito control spraying next summer should submit an application to the Waltham City Clerk. You can complete an online application for exclusion by clicking here.

Date:  April 7, 2017





The East Middlesex Mosquito Control Project will be conducting a helicopter application of the biological larvicide, Bti, to control mosquito larvae over wetland areas of the Beaver Brook Reservation in Waltham.  The application will be take place between April 18 and April 27.   The Bti will be applied in a granular formulation by a helicopter flying low directly over the wetlands.   Residents do not need to take any special precautions for this application.


The material to be applied Bti (Bacillus thuringiensis var. israelensis) is a natural bacterium found in soil. The EPA classifies Bti as a relatively non-toxic pesticide.  Bti is considered a target selective and environmentally compatible pesticide that affects mosquito larvae and a few closely related aquatic insects in the fly family.  Once applied Bti stays suspended in water for 24 to 48 hours and then biodegrades as it settles to the bottom.  The product name of the Bti is VectoBac G (EPA Reg.  #73049-10).


For further information contact the East Middlesex Mosquito Control Project at 781-899-5730.

Avoid Mosquito Bites                           




Apply Insect Repellent when Outdoors. 

Use a repellent with DEET (N, N-diethyl-m-toluamide), permethrin, picaridin (KBR 3023), oil of lemon eucalyptus [p-methane 3, 8-diol (PMD)] or IR3535 according to the instructions on the product label. DEET products should not be used on infants under two months of age and should be used in concentrations of 30% or less on older children. Oil of lemon eucalyptus should not be used on children under three years of age. The EPA can also assist with finding a repellent that is just right. (Image courtesy of CDC / PHIL.)


Be Aware of Peak Mosquito Hours. The hours from dusk to dawn are peak biting times for many mosquitoes. Consider rescheduling outdoor activities that occur during evening or early morning. (Per the Massachusetts Department of Public Health Zika fact sheet the kinds of mosquitoes that are known to carry Zika virus are generally not found in Massachusetts. Per the CDC mosquitoes that spread Zika virus bite mostly during the daytime. For up to date information on Zika mosquito prevention before and during travel click here.)


Clothing Can Help Reduce Mosquito Bites. Wearing long-sleeves, long pants and socks when outdoors will help keep mosquitoes away from your skin.


Protecting your child from mosquito bites.

  • Do not use products containing oil of lemon eucalyptus or para-menthane-diol on children younger than 3 years old.
  • Do not use insect repellent on babies younger than 2 months old.
  • Dress your child in clothing that covers arms and legs.
  • Cover crib, stroller, and baby carrier with mosquito netting.
  • Do not apply insect repellent onto a child’s hands, eyes, mouth, and cut or irritated skin.
  • Adults: Spray insect repellent onto your hands and then apply to a child’s face.


Check out reliable state and federal partner resources. The CDC has details that may assist with controlling mosquitoes at home in areas with Zika and other diseases spread by mosquitoes.


Mosquito-Proof Your Home

Drain Standing Water. Mosquitoes lay their eggs in standing water. Limit the number of places around your home for mosquitoes to breed by either draining or discarding items that hold water. Check rain gutters and drains. Empty any unused flowerpots and wading pools, and change water in birdbaths frequently.


Install or Repair Screens. Keep mosquitoes outside by having tightly-fitting screens on all of your windows and doors.


Protect Your Animals

Animal owners should reduce potential mosquito breeding sites on their property by eliminating standing water from containers such as buckets, tires, and wading pools – especially after heavy rains. Water troughs provide excellent mosquito breeding habitats and should be flushed out at least once a week during the summer months to reduce mosquitoes near paddock areas. Horse owners should keep horses in indoor stalls at night to reduce their risk of exposure to mosquitoes. Owners should also speak with their veterinarian about mosquito repellents approved for use in animals and vaccinations to prevent WNV and EEE. If an animal is diagnosed with WNV or EEE, owners are required to report to DAR, Division of Animal Health by calling 617-626-1795 and to the Department of Public Health (DPH) by calling 617-983-6800.


Massachusetts Specific Prevention Information