HomeMy WebLinkAboutMemo - Read Before Packet - 8/23/2022 - Memorandum From Matt Parker And Amy Resseguie Re: West Nile Virus (Wnv) - Larimer County Spray Recommendation 1745 Hoffman Mill Road
PO Box 580, Fort Collins, CO 80522-0580
MEMORANDUM
Date: August 23, 2022
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, Interim Deputy City Manager
Seve Ghose, Director, Community Services
Mike Calhoon, Director, Parks
Katie Donahue, Director, Natural Areas
Ginny Sawyer, Sr. Project Manager
Subject: West Nile virus (WNV) – Larimer County Spray Recommendation
Summary:
The Larimer County Department of Health and Environment is recommending a mosquito
treatment application in the northeast area of the city (map attached). This week’s WNV data
shows a vector index value of 0.80 in the northeast quadrant. The health department has
identified a floating zone consisting of a subset of the northeast zone traps exhibiting a vector
index value of 1.00.
The spray application will be conducted on Thursday, August 25 and Sunday, August 28.
Current Vector Index:
Week No: 33 Vector Index
Threshold:
Previous Week Vector
Index:
Current Vector
Index:
FC – Zone NW NA 0.06 0.11
FC – Zone NE NA 0.10 0.80
FC – Zone SE NA 0.14 0.33
FC – Zone SW NA 0.19 0.09
FC – Citywide NA 0.14 0.35
Floating Zone 0.75 0.51 1.00
Current Conditions: Fourteen traps tested positive across the city, including two traps at the FC-
066 location. The highest concentration of WNV as detected by the trapping system exists in a
10-trap sub-quadrant area in the northeast. Six of the ten traps tested positive. While infection
rates are typical for this time of year, higher abundance than typical is driving the values higher
this week.
DocuSign Envelope ID: 5EDF6F0C-BE44-4E0B-884C-8D3C8CA051EB
City of Fort Collins
Process for Spray Recommendations: Current WNV conditions exceed the policy thresholds
identified for adult mosquito spraying applications. W hen the City’s trapping network shows
WNV activity beyond the threshold of 0.75, the LCDHE makes a recommendation that the City
conduct an application to treat adult mosquitoes. When an application is recommended, areas
of concern will be 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:
With this recent recommendation from the County Health Department, additional communication
will take place, including phone, email and text notifications sent to those who have signed up to
receive such notices. Spray notifications and other outreach materials are shared in both
English and Spanish.
Public outreach is underway including social media posts, utility bill inserts and other
advertising. Outreach 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.
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DocuSign Envelope ID: 5EDF6F0C-BE44-4E0B-884C-8D3C8CA051EB
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FC-001
FC-004
FC-006
FC-011
FC-014
FC-015
FC-019
FC-023
FC-027
FC-029
FC-031
FC-034
FC-036
FC-037
FC-038
FC-039
FC-040
FC-041
FC-046
FC-047
FC-049
FC-050
FC-052
FC-053FC-054
FC-057
FC-058
FC-059
FC-060
FC-061
FC-062
FC-063
FC-064
FC-066
FC-067
FC-068
FC-069
FC-071
FC-072
FC-073
FC-074
FC-075
FC-088
FC-089
FC-090
FC-091
FC-092
FC-093
City of Fort Collins GIS
²
West Nile Virus - City of Fort Collins
Mosquito Spraying
Thursday, August 25 and Sunday, August 28
0 1 2½
Miles
Drake Rd.
Harmony Rd.S. College Ave.DocuSign Envelope ID: 5EDF6F0C-BE44-4E0B-884C-8D3C8CA051EB