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Glossary

Catch Basin

What is Catch Basin?

A catch basin is a curbside or in-ground stormwater inlet with a sediment sump that traps debris before runoff enters the sewer; vacuum and combo trucks clean out the accumulated sludge and spoils.

A catch basin collects surface runoff and lets heavier sediment settle into a sump so it does not clog the storm sewer. Over time the sump fills with sludge, leaves, and grit that must be vacuumed out to keep drainage working and prevent flooding.

Catch basin cleaning is a routine municipal task performed with a combination (combo) truck or industrial vacuum truck that suctions the material into a debris body for offloading. Rent the vacuum equipment for catch basin maintenance through a free request on Vac4Rent.

Renting equipment for this job? Vacuum Trucks for Catch Basin Cleaning

Guides that cover Catch Basin

Related terms

Combination (Combo) TruckWet WellSewer JettingSludge

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Catch Basin: common questions

What is Catch Basin?+

A catch basin is a curbside or in-ground stormwater inlet with a sediment sump that traps debris before runoff enters the sewer; vacuum and combo trucks clean out the accumulated sludge and spoils.

What is the difference between a catch basin and a storm drain inlet?+

Both take in surface runoff, but a catch basin has a sump: a pit below the outlet pipe where sediment and debris settle out before the water leaves. Many catch basins also have a hood over the outlet that holds back floating trash and oil. A plain inlet without a sump passes most sediment on into the storm pipe, so it is usually cleaned when debris blocks the grate or box, while a catch basin sump fills by design and is inspected regularly and emptied before sediment reaches the level local stormwater rules allow.

Who is responsible for cleaning a catch basin?+

It depends on who owns the drainage system. Catch basins in public streets are generally maintained by the city, county, or state transportation agency that owns the road. Basins on private property, such as parking lots, shopping centers, and industrial sites, are usually the property owner's responsibility, often under a stormwater maintenance agreement or permit that may require periodic inspection records. Check the local stormwater program to confirm who maintains a given basin.

Where does catch basin debris go after it is vacuumed out?+

Catch basin material is typically hauled to an approved disposal or decanting facility, where liquids are separated from solids. Depending on the area, the solids may need testing before landfill disposal because road runoff can carry oils and metals. Material should never be dumped back into a storm drain. Check state and local rules for where catch basin waste can legally be taken.