ROSEVILLE, Calif. – Hotter temperatures coinciding with seasonal mosquito behavior create ongoing mosquito problems in areas of North Lincoln and West Roseville, prompting the Placer Mosquito and Vector Control District to respond with ground-based mosquito treatments.

Mosquito traps, as well as reports from residents, suggest that the mosquito season is not quite over for Western Placer County. The District’s mosquito management plan includes providing treatment when mosquito populations have tested positive for West Nile virus, as well as if they have exceeded threshold numbers, posing a risk for vector-borne disease, both of which are the case this week.

The District has scheduled ground-based adult mosquito treatments for the early morning of October 1stin the following areas of West Placer:


  • Joiner Parkway to Waverly Dr. /Teal Hollow between 1st Street and Nicolaus Rd. and East of Joiner Parkway to P street, between Shellback Dr. and 7th Street
  • Neighbor Lane, south of Lincoln airport
  • Critter Creek and Knickerbocker Rd., southeast of Nicolaus Rd. and Brewer Rd.

West Roseville:

  • West of Fiddyment Road, from Hayden Pkwy. in the north to Pleasant Grove in the south, including residential areas south of Pleasant Grove and west of Fiddyment

Since several factors affect spraying activities, such as weather and wind conditions, the District encourages Placer residents to check the District website at for any changes to the spraying schedule.

With West Nile virus spreading to more populated areas of the county, the Placer Mosquito and Vector Control District advises the public to implement the 3 Ds of protection:

  • Drain any standing water that may produce mosquitoes.
  • Defend yourself and your home by using an effective insect repellent, dressing protectively when outside, and making sure screens on doors and windows are in good condition.
  • Contact the District for any additional help controlling mosquitoes around your home, or to report potential mosquito breeding sources, such as neglected swimming pools.

For more information, Placer County residents may contact the Placer Mosquito and Vector Control District at (888) 768-2343 or
2010 Placer County West Nile virus activity update:
7 dead birds, 3 sentinel chickens, 34 mosquito samples, and 3 humans have tested positive for West Nile Virus to date

Contact: Ada Barros, Public Information Officer
Direct: 916-380-5480 Cell: 916-343-0009