What causes polluted stormwater runoff?

People living their daily lives are a large source of stormwater pollutants! Most of us don’t know how we affect water quality of the Rio Grande as we go about our daily business. Some common examples include over-fertilizing lawns, excessive pesticide use, littering, not picking up pet waste, using salt or other compounds to de-ice the driveway and letting oil drip out of vehicles.

Cities where a lot of people and animals live, construction, farming and other activities are major contributors to Nonpoint Source Pollution. Other contributors are forest-harvesting, roadways, and malfunctioning or broken septic systems.

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