STORM WATER POLLUTION PREVENTION

RAIN GARDENS

What exactly is a rain garden?

While an attractive plot, it is designed for a special function: to help reduce the amount of storm water pollutants and other debris from entering our natural water sources. A rain garden is a shallow depression designed to collect and infiltrate water. Rain gardens range in depth from 4" to 8" depending on the location. It directs rainwater from your roof and/or driveway to pool in that specific location instead of discharging into the City’s storm sewer system.

What types of plants are in a rain garden?

Hearty plants which can survive varying weather conditions are normally planted within rain gardens. The key to choosing a quality plant is to consider the length of their roots, soil conditions, and maintenance.

How long is water evident after a rain event?

If it is designed and installed correctly, standing water is not usually present after 24 hours. However, varying soil conditions and rain events will affect the percolation rate of water into soil thereby changing the length of time standing water is present.

Where can I find additional information?

The links below will help clarify concerns further about creating and maintaining Rain Gardens.

Rain Garden Network

Clean Water; Rain Gardens

Wisconsin DNR, Rain Gardens