Pesticide and herbicide spraying in your community

The City currently applies some herbicides to control dandelions and other broad leaf weeds. We have established thresholds to determine when to conduct treatments, based on type of site and frequency of use. All sites are assessed prior to treatment to ensure the number of weeds exceed our thresholds.

We apply herbicides more often to sport fields, as they have a high use and too many broad leaf weeds can cause safety issues for users and threaten the health of the turf. For other areas, we apply at a lower frequency, as they have a higher tolerance for weeds.

The City takes the health and well-being of citizens and green spaces seriously, so all herbicides and pesticides are carefully chosen and applied to be the least toxic to off-target plants and animals. Furthermore, all pesticides and herbicides are fully certified by both the federal and provincial governments.

Notification and application signs will be posted in the community before, during and after any necessary applications. Herbicide is not applied within 10 metres of a playground unless the entire area is closed to the public and school sites do not receive applications while students are in attendance. There are also a variety of pesticide-free parks in Calgary. 

We also use some alternative weed management techniques, including using goats to manage Canada thistle and different methods of dandelion control. We continue to explore new techniques throughout the year.

NOTE: applications are weather dependent and may not take place as scheduled.

Herbicide Notification for the week of July 21, 2025
Community - Notable Park - Site Specific Location Community Code Quadrant Description of Work
Abbeydale ABB NE Broadleaf Weed Control, Shrub Beds
Castleridge CAS NE Broadleaf Weed Control - Hard Surfaces
Cityscape CSC NE Broadleaf Weed Control
Falconridge FAL NE Broadleaf Weed Control
Marlborough MRL NE Broadleaf Weed Control, Shrub Beds
Marlborough Park MPK NE Broadleaf Weed Control, Shrub Beds
Monterey Park MOR NE Broadleaf Weed Control, Shrub Beds
Pineridge PIN NE Broadleaf Weed Control, Shrub Beds
Renfrew REN NE Broadleaf Weed Control, Shrub Beds
Rundle RUN NE Broadleaf Weed Control, Shrub Beds
Skyview Ranch SKR NE Broadleaf Weed Control, Shrub Beds
Taradale TAR NE Hard Surfaces
Vista Heights VIS NE Broadleaf Weed Control, Shrub Beds
Whitehorn WHI NE Broadleaf Weed Control, Shrub Beds
Cambrian Heights CAM NW Broadleaf Weed Control, Shrub Beds
Capitol Hill CAP NW Legislated Weed Control
Collingwood  COL NW Legislated Weed Control
Evanston EVN NW Broadleaf Weed Control
Highwood HIW NW Broadleaf Weed Control, Shrub Beds
Hillhurst HIL NW Shrub Bed Weed Control
Houndsfield HOU NW Shrub Bed Weed Control
Huntington Hills HUN NW Hard Surfaces
Mount Pleasant MOP NW Broadleaf Weed Control, Shrub Beds
Nolan Hill NOL NW Shrub Bed Weed Control
Queens Park Cemetery QPK NW Broadleaf Weed Control
Rosemont RMT NW Shrub Bed Weed Control
Royal Vista  RYV NW Non Selective-Hard Surfaces
Sagehill SGH NW Non Selective - Hard Surfaces
Sandstone  SAN NW Broadleaf Weed Control, Hard Surfaces
University Heights  UNI NW Broadleaf Weed Control
West Hillhurst WHL NW Broadleaf Weed Control
Douglasglen DDG SE Broadleaf Weed Control
Dover DOV SE Broadleaf Weed Control
Mahogany MAH SE Broadleaf Weed Control
Ogden OGD SE Broadleaf Weed Control
Parkland PKL SE Invasive Weed Control
St. Mary's Cemetery ERL SE Broadleaf Weed Control
Aspen ASP SW Legislated Weed Control
Bankview BNK SW Non Selective - Hard Surfaces
Bridlewood BRI SW Broadleaf Weed Control
Coach Hill COA SW Legislated Weed Control
Cougar Ridge CGR SW Legislated Weed Control
Cresmont CRM SW Legislated Weed Control
Discovery Ridge DIS SW Hard Surfaces, Legislated Weed Control
Downtown Commercial Core DNC SW Broadleaf Weed Control, Shrub Beds
Evergreen EVE SW Broadleaf Weed Control
Midnapore MID SW Broadleaf Weed Control
Millrise MLR SW Shrub Bed Weed Control
Mission MIS SW Non Selective - Hard Surfaces
North Glenmore Park GPK SW Broadleaf Weed Control, Hard Surfaces
Signal Hill SIG SW Broadleaf Weed Control, Legislated Weeds
Silverado SIL SW Broadleaf Weed Control, Shrub Beds
Somerset SOM SW Shrub Bed Weed Control
Springbank Hill SPH SW Legislated Weed Control
Strathcona Park STR SW Legislated Weed Control
Sundance SDC SW Broadleaf Weed Control
Upper Mount Royal UMR SW Legislated Weed Control
West Springs WSP SW Legislated Weed Control
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