Green Infrastructure for Commercial Property
Green development standards
The City's Green Development Strategy focuses on sustainability and promoting environmental responsibility in new development in Mississauga. To learn more on the City’s Green Development Standards, click here.
Rainwater can be collected or harvested. Large scale rainwater harvesting works, like rain barrel water collection on a residential property, only on a larger scale. Rather than using barrels to harvest rainwater that runs off of catchment areas (like your roof or parking areas), Storage Tanks or Cisterns are more suitable for large properties. Some of these systems can hold tens of thousands litres of water.
Cisterns can be installed both indoors and outdoors and the water can be used for irrigation on your property or even for flushing your toilets. Contact licensed professional services and get all approvals to install large cisterns.
These structures collect, store and filter stormwater runoff, like a rain garden. Like rain gardens, bioretention areas are shallow dips in the ground that are filled with permeable soil, flood tolerant plants, stone and wood chips. Bioretention is the process where contaminants and sedimentation are removed from stormwater runoff. Stormwater is collected into the treatment area which can be a grass area, sand bed, ponding area or mulch layer, planting soil, and plants. The main differences are that bioretention areas are usually larger than rain gardens on a residential property and a bioretention area may also have drains beneath it for drainage. If there is no drain beneath a bioretention area, and soil conditions allow it, collected stormwater is filtered into the ground.
They can be built into a lawn area or around parking lots, raised landscaping planters, extended tree beds and in islands surrounded by paved or concrete surfaces.
Soakaway pits (dry wells), infiltration chambers and trenches
Large underground soakaway pits on commercial properties work the same way that they do on residential properties. Infiltration chambers and trenches are like soakaway pits in that they create space underground to collect rainwater for it to soak slowly into the ground. Infiltration chambers are large plastic, open-bottomed devices with perforated sides that are generally found beneath parking lots or other impervious areas. Their purpose is to temporarily store stormwater runoff from the site and filter into the ground beneath a sizeable hard surface area.
Infiltration trenches are similar to infiltration chambers, with the main difference being that they are long and narrow. These are often installed alongside or beneath walkways, sidewalks and narrow patches of land between buildings where there is enough distance from the building foundation.
IMPORTANT: Stay within your property's limit
When making improvements or changes to your property, it is important to stay within your property's limit and not extend onto public property, ravines or your neighbor's yard. Encroaching on City property can interfere with drainage, City maintenance or limit the use and enjoyment of public property. You could be fined by the City. Learn more here.