DO NOT position your downspouts so that they run directly to the lake or directly onto the roads or sidewalks. All water that falls on impervious surfaces should be first allowed to percolate through the ground before entering the groundwater or the lake to remove nutrients and sediment.
Yes, your roof and driveway get dirty. So do the roads and the sidewalks. When it rains the dirt (sediments and nutrients) either runs into the ground (a good thing) or directly into the town’s stormwater lines which empty into the lake. Some of you pipe it directly into the lake itself (honestly, not a very good thing). Please move or remove any piping that goes directly into the lake or into a storm drain unless it first runs through a sediment trap (L1 district) or the ground itself. Thanks!