HomeMy WebLinkAboutMemo - Read Before Packet - 8/8/2023 - Memorandum From Matt Parker And Amy Resseguie Re: West Nile Virus (Wnv) – Recommended Adult Mosquito TreatmentCity of
es„ FDort Collins
Natural
Areas
1745 Hoffman Mill Road
PO Box 580, Fort Collins, CO 80522.0580
MEMORANDUM
Date: August 8, 2023
To: Mayor and City Councilmembers
From: Matt Parker, Sr. Supervisor, Natural Areas
Amy Resseguie, Lead Specialist, Communications & Public Involvement
Through: Kelly DiMartino, City Manager }�
Tyler Marr, Deputy City Manager
Dean Klingner, Director, Community Services
Mike Calhoon, Director, Parks
Subject: West Nile virus (WNV) — Recommended Adult Mosquito Treatment
Summary:
The Larimer County Department of Health and Environment is recommending the City of
Fort Collins spray for mosquitoes in the southeast quadrant on Sunday, August 13. The
recommended spray area carries a vector index of 1.34, exceeding the policy threshold of 0.75,
and conforms with the City's policies for mosquito spraying.
Current Vector Index:
Week No: 31
Vector Index
Threshold:
Previous Week Vector
Index:
Current Vector
Index:
FC — Zone NW
NA
0.23
0.64
FC — Zone NE
NA
0.68
0.10
FC — Zone SE
NA
0.29
1.34
FC — Zone SW
NA
1.01
0.31
FC — Citywide
NA
0.51
0.70
Floating Zone
0.75
1.06
1.34
Current Conditions: This week's data includes 21 positive traps. Three key points are worth
highlighting in this week's data: first, the adult mosquito application in the northeast seems to
have significantly reduced mosquito abundance in that quadrant. Second, mosquito abundance
is returning to more normal levels except for the southeast quadrant. Lastly, nearly all the trap
data from the western quadrants reflects conditions prior to the Sunday, August 6 application
and therefore is not informative as a data point in determining potential application zones. This
is a natural result of the lag time associated with data collection and processing.
Process for Spray Recommendations: When the City's trapping network shows WNV activity
beyond the threshold of 0.75, the Larimer County Department of Health and Environment
(LCDHE) makes a recommendation that the City conduct an application to treat adult
mosquitoes. When an application is recommended, areas of concern are identified based on
data from a minimum of 5 traps. Identified treatment areas may be sub -zone or may cross zone
boundaries.
Outreach and Public Awareness:
Phone, email, and text notifications will be issued on Tuesday to all individuals signed up to
receive such notifications through Larimer Emergency Telephone Authority. A press release will
be issued, and information will be shared through social media. Webpage content will be
updated with the latest vector index values and a map of the planned spray area. All key
communications are shared in English and Spanish.
Throughout the West Nile Virus season, general outreach and education information is centered
on "4Ds" messaging, which encourages people to Drain standing water, Dress in long pants and
sleeves to deter biting, Defend with EPA -approved repellant, and avoid the high mosquito
activity time between Dusk & Dawn. Messaging also encourages community members to opt -in
to receive notification about any future spray events.
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City of Fort Collins
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Sunday, Aug. 13, 2023
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