Metropolitan Mosquito Control District warns of another cattail mosquito season; outlines tire‑drop events and surveillance data

Representatives of the Metropolitan Mosquito Control District presented an annual update to Carver County commissioners on March 17, reporting that 2025 was a record year for West Nile virus in the Twin Cities and outlining public‑facing programs for 2026.

Daniel Huff, executive director of MMCD, introduced Alex Carlson, the district’s public affairs manager, who summarized the agency’s integrated pest‑management approach and surveillance findings. Carlson said the Twin Cities recorded over 45 human West Nile cases in 2025 and cited an overall mosquito‑pool positivity rate of about 18.7 percent in the high season.

“I believe about 95 percent of West Nile cases are asymptomatic,” Carlson told the board in response to a commissioner’s question, adding that reported cases reflect only those who seek testing or clinical care.

The district emphasized larval control as its primary strategy, supplemented by targeted adult treatments. Carlson said MMCD treated the most larval acres since 2016, increased drone acreage, and used helicopters for widespread applications where necessary. He noted the district now provides new public maps that allow residents to look up breeding‑site histories, treatment records and inspection dates by address.

Budget and service notes: Carlson reported that the median homeowner in the Twin Cities pays about $11 per year for MMCD services, and that Carver County’s levy change was roughly $79,000 year over year in the district budget presented to commissioners.

Tires and public outreach: MMCD described a tire‑collection program that in 2025 shifted to drop‑off events rather than door-to‑door pickup. The district said it will again host spring and fall tire drop‑off days and a districtwide event in St. Paul for those who miss local dates. Commissioners and staff confirmed a local drop‑off date of June 3 for Carver County residents and that households may bring up to 10 tires at no cost with proof of residence.

Public questions and department responses: Commissioners asked about aircraft identification and the visibility of helicopters or drones during operations; Carlson said MMCD is working with contractors to improve identification markings and noted some helicopters already display a mosquito logo. Commissioners also asked about ticks and Lyme disease; MMCD said a multi‑year tick cycle makes increased Lyme risk possible this spring and pledged enhanced monitoring once ticks become active in April and May.

How residents can engage: MMCD urged residents to use the district’s website to call in concerns, submit tips, view the new public maps and consult the resident guide for prevention steps. The district will provide weekly summer reports and attend county events, including the Carver County Fair.