Stormwater, or water left behind from rain and snow, can run off of roads, driveways, sidewalks and roofs, and pick up potentially harmful pollutants as it flows over land and deposits them in surface waters. Stormwater is not only a threat to the water quality, but can also threaten the plants, animals and habitats of the Peconic. The more impervious surfaces, the less area there is for the water to infiltrate back into the ground. The more pollutants that are applied, produced or used, the more contaminated the stormwater will become. Effective stormwater management couples minimizing stormwater runoff volumes and decreasing pollutants.