From Harford County government:
The Harford County Department of Parks and Recreation will participate in the 2015 Mosquito Control Program season from June 1, 2015 to September 17, 2015. The program is offered by the Maryland Department of Agriculture, Mosquito Control Section.
Spraying to control adult mosquitos will take place in the following areas: Flying Point Park, Mariner Point Park, Lake Serene, Swan Harbor Farm and the Equestrian Center for the annual Farm Fair event.
If you would like further information regarding the mosquito control activities and policies, please visit the Maryland Department of Agriculture website at http://mda.maryland.gov/plants-pests/Pages/mosquito_control_policy.aspx . At this website, you can find a Request for Exemption from Adult Mosquito Control Services form. The phone number at the Maryland Department of Agriculture for questions regarding this program is 301-422-5080. To contact the Harford County Department of Parks and Recreation, please call 410-638-4753.