Stormwater: Rain Gardens and Drywells

Temporary Water Storage Helps Recharge Aquifers and Reduce Water Pollution

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Stormwater: Rain Gardens and Drywells, including:

  • Design and build strategies
  • Necessary codes
  • Application how-tos
  • Using materials

Handling runoff sensibly

Rainwater runoff is often sent to storm drains and, eventually, to overloaded municipal wastewater treatment plants. There are at least two alternatives, both of which capture runoff and hold it temporarily.

Both rain gardens and drywells allow runoff to soak back into the ground, which minimizes the risk of flooding and recharges underground water supplies.

A rain garden is a depression in the ground that’s been filled with permeable materials and capped with plants such as wildflowers, shrubs, and small trees. Unlike roadside swales, rain gardens are intended to hold the runoff that enters rather than act as a pass-through.

Drywells are hollow or rock-filled cavities set ...

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