Rain Gardens are designed to collect, filter and infiltrate stormwater runoff. By treating stormwater as a resource, we can keep polluted water out of our streams and keep our water sources clean. A rain garden is as simple as a depression in the ground. It collects water and allows it to seep into the ground before it gets into the locals stormwater system. Native meadow plants have deep root systems, which in this case, act as conduits to get the water into the ground. They can be any size, but often size is determined by the stormwater requirements of a specific town.