From ArborWiki

The Ann Arbor city stormwater fee structure is based on amount of impervious surface and provides green credits for residents who implement:

1. rain barrels or 2. rain gardens or 3. detention ponds

[edit] Where to buy a rain barrel

Growing Hope periodically sells rain barrels as a fundraiser.

[edit] How to build a rain barrel

The University of Florida Extension guide to building rain barrels is recommended by the city.

More information:

• Council approves stormwater credits for rain barrels, Arbor Update 6 June 2007.
• Residential Storm Credits, City of Ann Arbor web site. Viewed 9 July 2007.