"DOWN THE DRAIN"
Catch basins: red curb areas with openings under them for water to flow into
Storm drains: system of catch basins and tunnels which are underneath the city and allow the water to flow off of the streets and into the drains and down into the ocean
Source: where something comes from
Non-point source pollution: pollution that enters the ocean from many sources (cars, farmlands, trash, etc.) and not from a single source such as a sewage outfall.
Many coastal cites have a drainage system built into their infrastructure to handle excess run-off from rain and storms.
Everything that enters a storm drain ultimately ends up at the beach. Trash, leaf litter, oil from cars, and many other types of debris flow through the storm drains.
One of the biggest problems occurs when it rains, especially the first rain of the season. All of the trash, oil, etc. that has built up on the roads and in the catch basins (red curbed areas with openings) where the storm drains are visible on the street) is "flushed" down the storm drains to the beach. Marine wildlife can become entangled in the debris, they can also harm themselves by eating it. In addition, oils and other pollutants literally pollute the ocean environment. This includes bacteria and viruses that cause health problems for humans.
We need to be aware that what goes down the drain comes out in the sea.