Code Compliance
The Colorado Noxious Weed Act requires each County in Colorado to adopt a Weed Management Plan (WMP), and update it every 3 years. The most recent WMP was adopted in April 2010 (via Ordinance #02-2010) and went into effect on May 25, 2010. The WMP is Section 6.32 of the County Code.

Pitkin County Weed Management Plan

• Title Page (PDF)
• Acknowledgements (PDF)
• Table of Contents (PDF)
• 6.32.01 Introduction (PDF)
• 6.32.02 Definitions (PDF)
• 6.32.03 Colorado Noxious Weed List (PDF)
• 6.32.04 Pitkin County Noxious Weed List (PDF)
• 6.32.05 Weed Descriptions
  1. Section Overview (PDF)
  2. Absinthe Wormwood (PDF)
  3. Field Bindweed (PDF)
  4. Black Henbane (PDF)
  5. Downy Brome (PDF)
  6. Common Burdock (PDF)
  7. Wild Caraway (PDF)
  8. Scentless Chamomile (PDF)
  9. Chicory (PDF)
  10. Chinese Clematis (PDF)
  11. Sulfur Cinquefoil (PDF)
  12. Dame's Rocket (PDF)
  13. Poison Hemlock (PDF)
  14. Hoary Cress / Whitetop (PDF)
  15. Houndstongue (PDF)
  16. Diffuse Knapweed (PDF)
  17. Meadow Knapweed (PDF)
  18. Russian Knapweed (PDF)
  19. Spotted Knapweed (PDF)
  20. Common Mullein (PDF)
  21. Oxeye Daisy (PDF)
  22. Perennial Pepperweed (PDF)
  23. Russian Olive (PDF)
  24. Salt Cedar / Tamarisk (PDF)
  25. Cypress Spurge (PDF)
  26. Leafy Spurge (PDF)
  27. Myrtle Spurge (PDF)
  28. Common Tansy (PDF)
  29. Bull Thistle (PDF)
  30. Canada Thistle (PDF)
  31. Musk Thistle (PDF)
  32. Plumeless Thistle (PDF)
  33. Scotch Thistle (PDF)
  34. Dalmatian Toadflax (PDF)
  35. Yellow Toadflax (PDF)
• 6.32.06 Pitkin County Weed Watch List (PDF)
• 6.32.07 Early Detection, Rapid Response (PDF)
• 6.32.08 Enforcement (PDF)
• 6.32.09 Priorities and Goals (PDF)
• 6.32.100 Additional Rules, Regulations, and Policies (PDF)
• Appendix A The Threat of Escaped Ornamentals (PDF)
• Appendix B Native Thistles in Pitkin County (PDF)
• Appendix C Landowner Weed Management Plan (PDF)
• Appendix D Resource Directory (PDF)