Mosquito Control

West Nile Virus

Adult mosquitoes are routinely collected and tested for West Nile Virus (WNV) in Hamilton County. When mosquitoes are found positive for West Nile Virus, truck mounted spraying will take place at sunset and cover a buffer area of approximately 1 mile around the positively sampled area. Truck mounted spray is not done for nuisance mosquitoes and is not harmful to humans or pets. West Nile Virus activity peaks in August and September so make sure you're protected.

Enjoy the Outdoors

Remember these resources when enjoying the outdoors:

Zika Virus

Zika virus is spread to people through mosquito bites. The most common symptoms of Zika virus disease are fever, rash, joint pain, and conjunctivitis (red eyes). The illness is usually mild with symptoms lasting from several days to a week. Severe disease requiring hospitalization is uncommon.

In May 2015, the Pan American Health Organization (PAHO) issued an alert regarding the first confirmed Zika virus infection in Brazil. The outbreak in Brazil led to reports of Guillain-Barré syndrome and pregnant women giving birth to babies with birth defects and poor pregnancy outcomes.

In response, CDC has issued travel notices for people traveling to regions and certain countries where Zika virus transmission is ongoing.

PLEASE, Go to the CDC for website for the latest CDC Zika Virus information.

For Indiana information see the Indiana State Department of Health - ISDH Zika Virus

Hamilton County Educational Presentation Zika PDF

Mosquito Prevention Tips

Mosquitoes lay eggs in still water, which hatch in 7 to 10 days. If standing water is eliminated weekly, many mosquitoes will be kept from breeding in the first place...and with fewer mosquitoes, you can have more fun in your yard and throughout Indiana! Here are some things you can do:

  • #1 Remove standing water in ponds, ditches, clogged rain gutters, flower pots, plant saucers, puddles, buckets, garden equipment and cans.
  • Check for items that might hold water including barbecues, toys, pool covers, tarps, plastic sheeting, boats, canoes and trash.
  • Avoid mosquitoes by staying indoors at dawn and dusk when the bugs are most active.
  • Wear long-sleeved shirts and long pants while outdoors.
  •  Apply insect repellent that contains DEET. Use only 10% DEET on children, and make sure everyone washes their hands well so that they do not get any creme in their eyes or mouth. Follow directions carefully.

Learn more about DEET.

Insect Repellent Use and Safety

Insect Repellent Use and Safety/EPA Fact Sheets on DEET

Fight The Bite – Eliminate Backyard Breeding Sites

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Hamilton County Positive WNV Sample Locations

Reported Date
Sample Location / Area
City Spray Schedule
Dillon Park (146th & Hazel Dell)
07/15/2016 116th & Keystone
Carmel 07/15/2016
07/29/2016 98th & Chambray
08/03/2016 103rd & New Jersey
Carmel 08/03/2016
08/19/2016 Meadowlark Park
Carmel 08/21/2016
08/22/2016 103rd & New Jersey Carmel 08/22/2016
08/22/2016 5th Street Sheridan Sheridan Town of Sheridan
08/25/2016 Town of Atlanta
Atlanta 08/25/2016
09/05/2016 Meadowlark Park
Carmel 09/06/2016
09/05/2016 116th & Shelborne
Carmel 09/06/2016
09/6/2016 SR 32 & Hazel Dell Road
Noblesville 09/07/2016
09/12/2016 Cumberland Park
09/12/2016 116th & Keystone
Carmel 09/12/2016
09/23/2016 98th & Chambray


Spray Schedule Information for Positive Sites

  • All spraying activities are weather forecast dependent related to precipitation and wind speed.
  • All spraying has an approximate start time of 8:30 p.m.
  • In the event of inclement weather (high winds or precipitation) individual routes will be rescheduled on the following business day.
  • Please be aware that nuisance biting activity is increasing and that the Hamilton County Health Department only adulticides for mosquitoes in known areas of positive West Nile Virus activity.

Sign up to receive Text and Email of spray schedule updates by using the NOTIFY ME button on the Hamilton County homepage and select "Health Updates" from the News Flash list.

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