Source: California Invasive Plant Council

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Weed Management Areas and Regional Efforts

Weed Management Areas

WMA map
Weed Management Areas

County-based Weed Management Areas (WMAs) have formed in every part of the state. Follow the links below to learn more about each WMA, or see background on the WMA program. Links go to the WMA's own website if it has one or to a simple profile on our website. Help us keep these profiles up to date! Notify us of any changes by emailing

Choose a WMA below by county or by name. Some WMAs include multiple counties or only a portion of one county.


regions map
Regions map

Cal-IPC is working to to build a coordinated, strategic approach for invasive plant management statewide. Regional collaborations are going through a standardized process using CalWeedMapper to identify top-priority eradication and surveillance targets, and then pursuing funding to implement projects. Regions listed in the menu below are those that have eradication and surveillance plans in progress. More coming soon! See the map for all regions.