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METROPOLITAN MOSQUITO CONTROL DISTRICT
Metro Counties Government Center
2099 University Avenue West
Saint Paul, MN 55104-3431
(651) 645-9149 — www.mmcd.org
October 15th, 2021
Scandia City Administrator
RECEIVED
Ken Cammilleri OCT _' O Z0Z1
14727 209th Street North
Scandia, MN 55073
CITY OF SCANDIA
Dear Ken Cammilleri,
Enclosed is a summary of work done by the Metropolitan Mosquito Control District (MMCD) in the Scandia area
during the 2021 mosquito control season.
Throughout June and July, much of Minnesota was under severe or extreme drought conditions according to the
Department of Natural Resources which had a direct impact on mosquito numbers. Most mosquitoes rely on rain
for their life cycle and the lack of precipitation brought mosquito numbers down below the 10 -year average for the
entire season. In 2021 District Staff inspected over 70,000 breeding sites for mosquito larvae and applied 150,593
acres worth of treatments which is less than the 198,678 in 2020 and the 213,800 acres treated in 2019. We also
treated 284,863 catch basins in the seven -county metro to control disease mosquitoes.
West Nile virus was more active in Minnesota in 2021 than during the past two years. Confirmations of human
WNV illnesses have been delayed this year as COVID has strained the public health system. As of October 5, six
WNV illnesses had been confirmed in Minnesota with three of those cases in residents of the District (Hennepin
County). Data collected by MMCD through mosquito surveillance and testing suggest the final case total for 2021
will be considerably higher. In 2021, 60 mosquito samples tested in our lab were positive for WNV. In 2020 there
were six positive mosquito samples and zero human illnesses reported in Minnesota. In 2019 there were five
positive mosquito samples and five human illnesses in the state. The last active WNV year was 2018 when we saw
132 WNV positive mosquito samples and 63 human illnesses in Minnesota. For more information about vector-
borne disease in 2021 look for the MMCD Technical Advisory Board report coming in February 2022.
MMCD employees controlled immature black flies (biting gnats) in small steams and large rivers throughout the
metropolitan area. In 2021, 110 black fly larvicide treatments were made to the rivers and streams in the District.
In the spring, river flows were slightly above or near normal levels allowing for treatments to be made but the
persistent summer drought conditions in the region made for very low river levels which stopped most black fly
larval production for rest of the season. In May, high adult black fly populations of a small stream species occurred
resulting in increased customer calls from certain areas of the District.
With COVID restrictions loosened for certain public events we were able to return to some in-person activities like
the Minnesota State Fair, which helped with our educational offerings. We also created more online resources
including a new Residents Guide webpage and video to help people reduce mosquitoes where they live.
If you have any questions, or would like to meet to discuss our agency's activities, please contact me.
Sincerely,
Stephen A. Manweiler, Executive Director
Phone: (651) 643-8365 // Email: mmcd sam@mmcd.org
LARVAL CONTROL
The majority of control done by MMCD targets mosquitoes during
their larval stage. Mosquito larvae usually develop in standing
water and are most common after a rainfall. Larval control
materials are applied via helicopter, backpack, or by hand.
Larval Control in Scandia in 2021:
Sites Inspected: 208 I Acres Treated: 106.57
ADULT CONTROL
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MMCD supplements our larval control program with limited adult
f mosquito control. Adult control materials are applied via backpack
during the day or truck -mounted cold fogger in the evening.
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Adult Mosquito Control in Scandia in 2021:
Sites Inspected: 113 I Acres Treated: 0.00
DISEASE PREVENTION
Controlling the mosquito species that are most likely to spread
disease is a top priority for MMCD. Removing containers that
could hold stagnant water is critical to reducing the spread.
Disease Prevention Activity in Scandia:
Tires Removed: 58 I Catch Basins Treated: 0
Disease Prevention Property Inspections: 4
CUSTOMER CALLS
We encourage residents of the district to call MMCD to report mosquito annoyance, employee or
helicopter concerns, request waste tire removal, or for anything else.
Customer Calls from Scandia in 2021: 8