Storm Drains & Culverts

A maze of underground storm drains carry rain and melting snow as it runs off roofs, driveways, roads and other hard surfaces. Along the way, it picks up pet waste, oil, fertilizers, pesticides and other pollutants. These substances are harmful, and if they enter drains and catch basins, they end up in our waterways and eventually the ocean.

Water from storm drains flows directly into streams is not treated before it reaches the natural environment. To protect fish and their habitats, it is important to never wash hazardous substances into the storm drain.


You may notice that many West Vancouver streets are lined with open, unpaved ditches. These ditches help slow water down as it drains off roads and adjacent properties, reducing creek flows and erosion. Open ditches also give pollutants a chance to settle out before reaching creeks and the ocean. 

Metro Vancouver Stormwater Management

Storm Drainage System Infrastructure

By the numbers:

  • storm drainage mains: 235 km
  • culverts: 522
  • creeks/streams: 26 km
  • storm water detention basins: 19
  • rain gauges: 5
  • oil-grit separator: 1
  • grates: 136

Report a Spill

If you witness a spill or harmful substances being washed into a storm drain, or a contaminated stream, contact the District immediately at 604-925-7100.

You can also call Emergency Management BC at 1-800-663-3456.

If you see any spill that is an immediate concern for your safety and the safety of others, call 9-1-1.