| Watershed Protection | |
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| Stormwater, resulting from rain and snow, is the source of fresh water that feeds our streams, lakes and aquifers. As a water source, stormwater must be clean and in good supply to protect our drinking water supplies, and preserve streams and lakes for recreation and wildlife habitat. How we use land affects the way stormwater flows. Under undisturbed conditions, over half of precipitation infiltrates the soil and only about ten percent runs off the surface. The natural vegetation acts like a sponge and a filter, slowing the flow and cleaning the water. Roads, pavement and buildings (impervious surfaces) reduce the area where stormwater can soak into the soils to replenish water supplies. This means less water recharges aquifers, making them unable to keep up with the amount wells pump out. Roadways and storm sewers act like highways for stormwater, speeding its flow causing erosion. Stormwater also carries pollution. As water flows across land, it picks up all sorts of contaminants - litter, pesticides, fertilizer, pet wastes, petroleum products, and road salts. The increased volume and speed of stormwater runoff from paved surfaces wash more of these pollutants into water bodies. | |
Pollution reduction tips
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