Cleaner Water
Did you know that because of impervious surfaces like pavement and rooftops, a typical city block generates more than five times more runoff than a woodland area of the same size? Much of the land surface in urban and suburban areas is covered by buildings and pavements, which do not allow rain or snow melt to soak into the ground. Storm drains are relied upon to carry runoff from roofs and paved areas to local waterways. Pollutants such as dirt, oil and fertilizers are picked up along the way and can harm water quality. Low-impact development techniques can help to minimize storm water runoff.
Viewer Tip: You can help reduce storm water runoff in your neighborhood with these tips.
- Create a shared driveways. This reduces the amount of paved surfaces in a neighborhood.
- Disconnect your downspouts. This allows roof water to be redirected from paved surfaces and storm drains and into lawns and gardens. Some areas do not allow downspout disconnection, so contact your state’s Department of Natural Resources or Department of Environment for advice.
Seasons: Spring, Summer, Fall, Winter
(Sources: United States Environmental Protection Agency, www.epa.gov/owow; Portland Bureau of Environmental Services, www.portlandonline.com/bes/)
