Mosquito Control Notifications

Routes marked in RED will be performed 3:00am - 6:30am
Routes marked in BLUE will be performed 7:30pm-11:30pm
Routes marked in YELLOW will be performed 3:00am - 6:30am and 7:30pm -11:30pm
Routes marked in GREEN will be Wide Area Larviciding performed 3:00am - 7:00am

Click on the name of the area to provide more detailed data

To receive Text notifications: TEXT "shastamosquito" to 888-612-1332


* indicates required
() -

Q. When and why does the District spray?

A. Reducing the adult mosquito population with pesticides (adulticides) approved by the US Environmental Protection Agency (EPA) will be done if necessary to prevent human illness or to suppress a heavy nuisance infestation of mosquitoes. The decision to spray by truck-mounted sprayers will be based on surveillance information or the documentation of West Nile virus activity at a level that indicates a threat to human health. Spraying will be concentrated in areas most at risk for disease occurrence and will be conducted by certified and licensed applicators. The District's aggressive campaign against mosquito larvae is intended to minimize the need to use adulticides. 

Q. What risks are there to the residents of Shasta Mosquito and Vector Control District?

A. The risks to the public and to the environment are very low. Mosquito adulticides are applied as ultra-low volume (ULV) sprays. ULV applications involve small quantities of active ingredient in relation to the size of the area treated, typically one ounce or less per acre, which minimizes exposure and risk to people and the environment. Most applications take place between 3:00 and 6:30 A.M. and 7:30 and 11:30 PM, which is when adult mosquitoes are at their peak activity levels. This small amount of spray quickly dissipates and is broken down into inert components by exposure to sunlight.

There are more questions (and answers) available online: FAQs

For information from the CDC about truck spraying, visit their website: Truck Spraying | Mosquitoes | CDC
Doc app

Document Center

The Document Center provides easy access to public documents. Click on one of the categories below to see related documents or use the search function.

Categories always sorted by seq (sub-categories sorted within each category)
Documents sorted by SEQ in Ascending Order within category

Mosquito Control Notifications5 documents

  • Perm X-30-30
    document seq 0.00
  • Zenivex E20
    document seq 0.00
  • Fyfanon
    document seq 0.00
  • Merus 3.0
    document seq 0.00
  • VectoBac WDG
    document seq 0.00