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WUCOLS IV Home Page

WUCOLS IV Plant Search Database

We've created a resource for California residents interested in conserving water in their landscapes. In this map, you'll find information published by your local municipalities and water utilities, including conservation practices, low-water plants, rebate programs, and more.  

As of December 2013, you can also find information about recycled water in your region. This may include upcoming or ongoing projects and tips on using recycled water in your landscapes.

Select the appropriate map below and start saving California’s most precious commodity today!

The California drought has residents concerned about how to save water.  In fact, some homeowners have opted to turn off their outdoor watering system, and it’s not uncommon to see brown lawns. However, not watering a landscape means that many trees will slowly decline in health and could die. While lawns and flowers are easily replaced, a large shade tree takes many years to become established.

Author: Loren Oki, UC Davis Department of Plant Sciences

A Step by step guide with example problems to determine how long to run your irrigation system. 

Printable version

Eleven pest control chemicals, including products no longer commercially available, were found virtually year-round in storm drain water samples from eight selected California neighborhoods. The main ingredients of lawn and garden fertilizers were also found in the water samples at all sites.