The Lobby

The Clackamas/Clark/Multnomah/Washington County Cooperative Weed Management Area (4-County CWMA) is a partnership of organizations throughout SW Washington and NW Oregon dedicated to combating invasive weeds for the benefit of native habitat, air, water, and soil quality, agricultural production, and human health.

If you can’t find what you’re looking for, please drop us a line.  We’re aiming for ‘perfect’ but haven’t quite gotten there, yet….