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 14, 2025
Community - Notable Park - Site Specific Location Community Code Quadrant Description of Work
Cambrian Heights CAM NW Broadleaf Weed Control, Shrub Beds
Evanston EVN NW Broadleaf Weed Control
Highwood HIW NW Broadleaf Weed Control, Shrub Beds
Hillhurst HIL NW Shrub Bed Weed Control
Houndsfield Heights HOU NW Shrub Bed Weed Control
Huntington Hills HUN NW Non Selective-Hard Surfaces
Mount Pleasant MOP NW Broadleaf Weed Control, Shrub Beds
Nolan Hill NOL NW Shrub Bed Weed Control
Parkdale PKD NW Broadleaf Weed Control
Queens Park Cemetery QPK NW Broadleaf Weed Control
Ranchlands RAN 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
St Andrews Heights STA NW Broadleaf Weed Control
Tuscany TUS NW Broadleaf Weed Control, Shrub Beds
University Heights UNI NW Broadleaf Weed Control
West Hillhurst WHL NW Broadleaf Weed Control
Abbeydale ABB NE Broadleaf Weed Control, Shrub Beds
Beddington BED NE Broadleaf Weed Control
Castleridge CAS NE Broadleaf Weed Control - Hard Surfaces
Falconridge FAL NE Broadleaf Weed Control
Marlborough MRL NE Broadleaf Weed Control, Shrub Beds
Marlborough Park MPK NE Broadleaf Weed Control, Shrub Beds
Martindale MRT NE Broadleaf Weed Control
Mayland Heights MAL NE Broadleaf Weed Control
Monterey Park MOR NE Broadleaf Weed Control, Shrub Beds
Pineridge PIN NE Broadleaf Weed Control, Shrub Beds
Renfrew REN NE Broadleaf Weed Control
Rundle RUN NE Broadleaf Weed Control, Shrub Beds
Taradale TAR NE Non Selective-Hard Surfaces
Vista Heights VIS NE Broadleaf Weed Control, Shrub Beds
Whitehorn WHI NE Broadleaf Weed Control, Shrub Beds
Dover DOV SE Broadleaf Weed Control
Forest Lawn FLN SE Broadleaf Weed Control
Inglewood ING SE Shrub Bed Weed Control
Mahogany MAH SE Broadleaf Weed Control
Ogden OGD SE Broadleaf Weed Control
Parkland PKL SE Invasive Weed Control
Douglasglen DDG SE Broadleaf Weed Control
St. Mary's Cemetery ERL SE Broadleaf Weed Control
Bankview BNK SW Non Selective-Hard Surfaces
Bridlewood BRI SW Broadleaf Weed Control
Discovery Ridge DIS SW Non Selective-Hard Surfaces
Downtown Commercial Core DNC SW Broadleaf Weed Control, Shrub Beds
Evergreen EVE SW Broadleaf Weed Control
Meadowlark Park MEA SW Shrub Bed 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
Silverado SIL SW Broadleaf Weed Control, Shrub Beds
Strathcona Park STR SW Non Selective-Hard Surfaces
Somerset SOM SW Shrub Bed Weed Control
Sundance SDC SW Broadleaf Weed Control
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