Why do subdivisions have retention ponds?
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andrew
Stormwater runoff collects pollutants, chemicals and debris as it flows over paved surfaces and into water bodies. Retention ponds or “wet ponds” are ponds constructed to treat and store stormwater runoff. Retention ponds are permanent pools of standing water and eventually empty into a receiving water body.
avery
Retention ponds capture the diverted stormwater runoff from streets and gutters. These ponds provide two primary services. First, they retain the runoff before releasing it into streams. They release the water at flow rates and frequencies similar to those that existed under natural conditions.
John Wick
As such, the sediment collected in the depth of these structures can contain heavy metals and contaminates. They can also have toxic algae blooms which can threaten the lives of children and pets or cause serious illness if ingested or placed in direct contact with skin.