When it comes to Catch Basins, the word is used interchangeably with Storm Sewers and Storm Drains. Many people have never heard of a catch basin and instead call catch basins storm drains or storm sewers. This is fine if you’re just talking with the guy next door, but if you’re talking about a commercial project, we need to be more specific.
In short, Catch Basins are holes in the ground that “catch” the rainfall or any runoff surface water. Storm Drains are a type of Catch Basin and are typically along the side of roads to deal exclusively with storm runoff. Storm Sewers are the systems that carry the water away.
Catch Basins are a vital part, too, because they’re the things that catch the water.