Stormwater Map

Map Legend

Constructed wetlands are engineered systems that use natural functions of vegetation, soil, and organisms to treat different water streams.

A bioswale is a vegetation-filled, shallow, open channel that controls the flow of stormwater – a ditch with purpose. The flood- and erosion-resistant native vegetation improves water quality through infiltration, sedimentation and filtration.

A cistern is a tank for storing water, especially one supplying taps or as part of a flushing toilet.

A green roof or living roof is a roof of a building that is partially or completely covered with vegetation and a growing medium, planted over a waterproofing membrane.

Green walls are self sufficient vertical gardens that are attached to the exterior or interior of a building. The plants root in a structural support which is fastened to the wall itself, and they receive water and nutrients from within the vertical support instead of from the ground.

Porous or permeable pavers are designed with large voids that temporarily store stormwater, allowing runoff to infiltrate the soil below.

Rain barrels collect and store stormwater runoff from your roof. They attach directly to a downspout and fill automatically with every rainfall.

A rain garden is a planted depression or a hole that allows rainwater runoff from impervious urban areas, like roofs, driveways, walkways, parking lots, and compacted lawn areas, the opportunity to be absorbed.

Sometimes called a wet pond or wet detention basin, it is an artificial lake with vegetation around the perimeter, and includes a permanent pool of water in its design.

Risk of a stormwater flooding event, based on historic records of floods, damage, fisheries closures, and infrastructure types.

About the Map

This map consists of two layers: one that shows the locations of Low Impact Developments (LIDs) across Atlantic Canada, and another showing the “risk” of experience a flooding or water contamination event. The risk layer is based on media reports of significant floods, shellfish closures from land-based pollutants, locations with combined sewer systems, and historic flood data.

Is your LID not on the map? It should be! Use the form below to send the information on your LID to ASI.


Submit a new point for the stormwater map

  • If your site contains more than one type of feature, please submit each as a separate entry.
  • Community where the feature is located
  • You may upload a photo of the feature if you wish
  • The address enables us to create the pinpoint for the map. If you do not enter the address, we will add your feature to our records but will not be able to add it to the map.
  • If you know the latitude of your feature's location, you can enter it here instead of the address.
  • If you know the longitude of your feature's location, you can enter it here instead of the address.