Catch basin cleaning costs $150–$400 per basin in Ontario in 2026, and it's the least glamorous, highest-leverage line in a commercial property's maintenance budget. Here's what cleaning involves, when to schedule it, what the sump is quietly protecting you from — and what it costs to skip.
What a Catch Basin Actually Does
Every paved commercial lot drains to catch basins — concrete structures with a grate on top and, below the outlet pipe, a deep sump. The sump is the working part: runoff slows, sand and debris settle into it, and comparatively clean water continues to the storm sewer. When the sump fills, settling stops. Grit and litter flow straight into your private lateral and the municipal system, and the basin becomes a pipe with extra steps — until the lateral clogs and it becomes a fountain.
Cleaning Costs and What's Included (2026)
| Service | Typical 2026 price |
|---|---|
| Vacuum cleaning, scheduled route | $150–$250 per basin |
| Vacuum cleaning, one-off visit | $250–$400 per basin |
| Emergency callout (flooding) | $400–$800+ |
| Lateral jetting/flushing add-on | $350–$900 |
| Camera inspection add-on | $300–$700 |
A proper visit includes vacuum removal of all sump material, inspection of the grate, frame, and visible barrel joints, a check of the outlet, and licensed disposal of the removed material. Ask for photos before and after — good contractors document by default, and those photos are your maintenance record if a flooding claim ever lands on your desk.
When to Clean: The Ontario Calendar
Late fall (after leaf drop) and early spring (after the sand and salt season) are the two natural slots. Annual cleaning in either slot suits most properties; sites with heavy tree cover, high traffic, or drainage history do both. Spring cleaning pairs naturally with parking lot sweeping — sweep first so the lot's winter grit doesn't refill the basin you just paid to empty, then clean the basin. Booking both as one mobilization is cheaper than either alone.
Warning Signs Between Cleanings
- Ponding around the grate after moderate rain — the first and most reliable symptom.
- A settled asphalt ring around the basin — frost has been working on the structure; budget a top rebuild before the plow finds the low grate.
- Winter ice sheets spreading from the basin across drive lanes — water is arriving but not leaving, and your slip-and-fall exposure is climbing with every freeze.
- Odours in summer — stagnant water over a full sump.
DIY vs. Professional: The Real Comparison
Lifting the grate and scooping surface leaves each October is genuinely worthwhile facilities work. Below that, practicality ends: sump material is heavy, wet, contaminated with hydrocarbons, and legally regulated fill — a vacuum truck removes in minutes what hand tools can't reach at all, and licensed disposal is built into professional pricing. The camera and jetting equipment for lateral problems isn't rentable expertise either. Keep the blower work in-house; contract the vacuum work.
How to Get an Accurate Quote
Count your grates or send an aerial screenshot — we'll confirm the basin count, quote a route price, and flag any basins that look structurally tired while we're in them. Serving Kitchener-Waterloo, Cambridge, and Guelph; details on our drainage services page.
Frequently Asked Questions
How much does it cost to clean a catch basin in Ontario?
Vacuum cleaning runs $150–$400 per basin in 2026. Properties with several basins on a scheduled annual route pay toward the bottom of the range; emergency callouts for a flooding basin during a storm pay the top, plus after-hours premiums.
What comes out of a commercial catch basin?
Mostly winter sand and salt grit, plus leaves, litter, sediment, and — in the sump — oily residues that settle from parking lot runoff. A neglected mid-size basin commonly yields several hundred kilograms of material. That material is regulated: it goes to licensed disposal, not a dumpster.
How do I know if my catch basin needs cleaning?
Look for slow drainage or ponding after rain, visible sediment within a half-metre of the grate, plant growth in the basin, or odours. If you can't remember the last cleaning, it's due — the sump has almost certainly lost its settling capacity.
Are property owners responsible for catch basins in Ontario?
Yes — basins on private property, their grates and structures, and the private storm laterals to the municipal connection are the owner's to maintain. Municipal sewer-use bylaws also hold owners responsible for keeping sediment and pollutants out of the public system.
What happens if catch basins are never cleaned?
The sump fills, debris passes into the outlet pipe, and the lateral eventually blocks — then the basin backs up in the first big storm, flooding the lot and sometimes neighbouring units. Blocked laterals mean jetting ($350–$900) or excavation; a flooded tenant means an insurance file. Annual cleaning is the cheap branch of that decision tree.
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