Cities Where the Silva Cell Is Approved for Use

In the seven years that the Silva Cell has been on the market, a number of cities have designated it as an approved technology for their sustainability goals, whether for tree growth, on-site stormwater management, or both. Here is a list of all the places, organized by state/province, that include it in their policies.


Calgary, AB Residential Street Design Policy
Edmonton, AB Low Impact Development Best Management Practices Design Guide

British Columbia:

Burnaby, BC Metrotown Development Area
Langley, BC (approved for general use to meet required soil volumes)
North Vancouver, BC – Lower Lonsdale Development Area
Vancouver, BC – South East False Creek Development Area


Kitchener, ON Development Manual
Markham, ON Streetscape Manual
Toronto, ON City of Toronto Urban Design Streetscape Manual
York Region, ON (approved for general use to meet required soil volumes)


Winnipeg, MB Tree Planting Specifications & Details (Downtown Area and Regional Streets)


Montgomery County, MD (as a stormwater BMP)


St. Louis, MO Metropolitan Sewer District


Mesquite, TX Landscape and Tree Preservation Ordinance


Washington State Department of Ecology (designated as functionally equivalent to bioretention)
* the modeling procedure can be found here

Top image Flickr credit: D. Reichardt

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