Stormwater Management is a big part of every project that I do.
In our area, many homes are close to their neighbors; many have slopes, sometimes steep, and often there's a lot of ledge at or near the surface. Some properties end up being the "final destination" of multiple neighbors' stormwater.
Villages on the LI Sound or the Hudson River don't allow residents to put stormwater directly into storm sewers without "pretreatment" any more, because the storm sewers are connected directly to the waterbodies themselves. And local regulations don't allow "dumping" of stormwater onto the neighbor's property either.
add stormwater management practices to the landscape design, so that water - a non-renewable resource - can be properly returned back into the water cycle.