Updated 5/13/09

WSDA holds the NPDES permit for use of herbicides to control aquatic noxious weeds in Washington State. The permit addresses use of herbicides to control marine weeds (such as Spartina), and freshwater emerged weeds (such as purple loosestrife).

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• 2008 Aquatic Noxious Weed Control NPDES Waste Discharge General Permit
• 2008 Monitoring Plan Spartina Eradication Program
• 2008 Monitoring Plan for Herbicide Applications to Freshwater Emergent Noxious and Quarantine Weeds
• Information on the new permit
• Pre-2008 Aquatic Noxious Weed Control NPDES General Permit
• 2007 Spartina Eradication Program Monitoring Results
• 2007 Freshwater Emergent Noxious and Quarantine Weeds Monitoring Results
• SEPA Checklist for Freshwater Emergent Noxious Weeds:  Checklist   Attachment A
• SEPA Checklist for Marine Emergent Noxious Weeds:  Checklist