Mosquito Control

How does the Health Department control mosquitoes?

Hamilton County employs an integrated mosquito management methods that are endorsed by the CDC and EPA are comprehensive and specifically tailored to safely counter each stage of the mosquito life cycle. Larval control through water management and source reduction, is a critical pest management as is use of the environmentally friendly EPA-approved larvicides currently available. When source elimination or larval control measures are difficult to acheive, or when disease presences is identified, the EPA and CDC have emphasized the need for considered application of adulticides.  Local health staff are certified applicators and trained by the Office of the Indiana State Chemist in the special handling characteristics of these products.
Our mosquito management program includes the following elements:

 1.  larval and adult mosquito sampling;
2.    source reduction;
3.    larviciding and adulticiding, when indicated by surveillance;
4.    resistance monitoring;
5.    disease surveillance in mosquitoes, and humans
6.    public education.

What you need to know about mosquito truck spraying

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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Press Releases

Hamilton County Positive WNV Sample Locations -2018

Reported Date
Sample Location / Area
City Spray Schedule
07/13/2018 Cumberland Park Fishers 07/17/2018
07/16/2018 Dillon Park Noblesville 07/17/2018
07/18/2018 2nd & Washington Noblesville 07/19/2018
07/25/2108 181st & US 31 Westfield 07/25/2018
07/25/2018 103rd & New Jersey Carmel 07/26/2018
07/25/2018 SR 38 & Hague Rd Noblesville 07/26/2018
08/01/2018 Geist Park Fishers 08/02/2018
08/01/2018 98th & Chambray Carmel 08/02/2018
08/02/2018 2nd & Washington Noblesville 08/02/2018
08/03/2018 Arcadia Arcadia 08/06/2018
08/06/2018 Atlanta Atlanta 08/08/2018
08/06/2018 191st & SR 37 Noblesville 08/08/2018
08/06/2018 116th & Hoosier Rd Fishers 08/08/2018
08/06/2018 Meadowlark Park Carmel 08/09/2016
08/06/2018 Red Bridge Park Cicero Town of Cicero
08/10/2018 Dillon Park Noblesville 08/19/2018
08/10/2018 116th & Keystone Carmel 08/13/2018
08/10/2018 Founders Park Carmel 08/14/2018
08/10/2018 116th & Rangeline Carmel 08/13/2018
08/10/2018 Asa Bales Park Westfield 08/19/2018
08/10/2018 Greenfield Avenue Noblesville 08/14/2018
08/17/2018 103rd & New Jersey Carmel 08/22/2018
08/17/2018 146th & Allisonville Noblesville 08/22/2018
08/20/2018 Forest  Park Noblesville 08/23/2018
08/27/2018 116th & Shelborne Carmel 0828/2018
08/27/2018 Billericay Park Fishers 08/28/2018
08/27/2018 Morse Park Cicero 08/28/2018
08/27/2018 181st & US 31 Westfield 08/29/2018
08/27/2018 Sheridan Sheridan 08/29/2018
08/27/2018 2nd & Washington Noblesville 08/29/2018
09/04/2018 Red Bridge Park Cicero Cicero
09/04/2018 Holland Park Fishers 09/05/2018
09/04/2018 Heritage Park Fishers 09/05/2018
09/10/2018 Greenfield Avenue Noblesville 09/12/2018
09/10/2018 Hague Rd Sr 38 Noblesville 09/12/2018
09/11/2018 Prairie Lakes Noblesville 09/12/2018
09/11/2018 116th & Keystone Carmel 09/13/2018
09/11/2018 Cumberland Park Fishers 09/13/2018
09/11/2018 116th & Hosier Road Fishers 09/13/2018

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 or local sunset.
  • 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 adulticide sprays 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.

Request Services

No Spray Registration

  • The Health Department is currently working to develop a No Spray Registry.  Until constructed, please contact vector control by phone or use the Online Request for Mosquito control above.
  • Individuals with medical conditions.
  • Agricultural sensitive areas (i.e. Bee Hives) can register their hives on Drift Watch Beecheck web site.  Data is drawn from this site and layered on local GIS maps used during spray applications.