Mosquito Control in Maryland Department of Agriculture Mosquito Control service area, Maryland — Free Help & Local Info
State program operating with participating counties since 1956. The program page says direct service to about 2,100 communities in 16 counties; it does not list all 16. The online complaint form names Anne Arundel, Baltimore, Cecil, Charles, Dorchester, Harford, Howard, Kent, Prince George's, Queen Anne's, Somerset, St. Mary's, and Worcester. A 2026 College Park office letter adds Montgomery (with Prince George's and Howard) and phone 301-422-5080, toll-free 888-523-0256. Spray-alert line on the program page is 410-841-5870. Larval work, biological control, and ULV adulticide are described. Nuisance adulticide is voluntary and locally cost-shared; thresholds are 3 landing mosquitoes in 2 minutes or 12 human-biting females per unbaited trap-night. Mosquitofish was not named. Being in a listed county does not mean the community bought adulticide.
What's free
In a funded program, free means no additional visit fee for eligible residents. The capabilities below do not promise free treatment at every address. Confirm fees, boundaries and availability with the agency; Maryland adult mosquito service uses local cost-sharing.
- Property inspections: Confirmed program capability; eligibility and terms vary.
- Mosquitofish for residents: Not verified; ask the program.
- Larval mosquito control: Confirmed program capability; eligibility and terms vary.
- Adult mosquito control: Confirmed program capability; eligibility and terms vary.
- Spray notices: Confirmed program capability; eligibility and terms vary.
How to request service
- Phone: 410-841-5870
- A direct request URL is not verified; consult the official website for the current request route.
- Official program website
- Find spray notices or notification instructions on the official site
What they will and won't do
Public education and removing standing water are common parts of mosquito programs. Larval control may target public water, ditches and catch basins. Adult mosquito treatment follows local program criteria; a complaint is not a promise of spraying. Inspection eligibility, fish availability, pickup or delivery, response times and seasons vary. Public programs generally do not provide routine yard spraying or event protection on demand. Confirm your address with the agency: ZIP codes and county names do not establish district coverage.
Find help by ZIP
Open the ZIP finder. Its current dataset is partial and focused on California. A missing result does not establish that no public program exists.
Join the local information waitlist
Register interest in future MSQTO updates. This does not request agency service or activate official spray alerts.