Stewardship & Vegetation Management

4-County County Cooperative Weed Management Area

The Clackamas/Clark/Multnomah/Washington County Cooperative Weed Management Area (4-County CWMA) is a partnership of organizations, agencies and non-profits dedicated to combating invasive weeds across the region.  Member organizations have committed to these efforts for a variety of reasons:  supporting agricultural production, protecting human health, and preserving air, water and soil quality.

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