Doesn’t stormwater go to a sewage treatment plant?
No. The runoff that enters a storm drain is connected by underground pipes that often convey stormwater directly to a nearby body of water. Sometimes these storm drains are piped to leaching basins where they eventually percolate into groundwater. In Suffolk County many of these outfall pipes deposit water into ecologically valuable waterbodies such as the Long Island Sound, Peconic Estuary and Great South Bay.
