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Aquatic Noxious Weed Control NPDES General Permit Monitoring Information
2,4-D |
Fluridone |
Diquat |
Glyphosate/Imazapyr
This site provides monitoring results from various lakes and rivers in
Washington that were treated with aquatic herbicides under the Noxious Weed
NPDES permit. Ecology also intends to publish the results in the scientific
literature of comprehensive studies using diquat and triclopyr.
2,4-D Residue Monitoring
Sacheen Lake, Pend Oreille County (Eurasian Watermilfoil Control)
Diamond Lake, Pend Oreille County (Eurasian Watermilfoil Control)
Newman Lake, Spokane County (Eurasian Watermilfoil Control)
Liberty Lake, Spokane County (Eurasian Watermilfoil Control)
Hideaway Lake, Douglas County (Eurasian Watermilfoil Control)
Steel Lake, King County (Eurasian Watermilfoil Control)
Lake Serene, Snohomish County (Eurasian watermilfoil Control)
Spring Lake, King County (Eurasian Watermilfoil Control)
Lake Washington (Hunts Point), King County (Eurasian Watermilfoil Control)
- 2003 Monitoring Data - AquaKleen & DMA*4IVM (also includes biomass,
dissolved oxygen, and temperature monitoring)
- 2004 Monitoring Data - DMA*4IVM (also includes plant frequency, biomass,
dissolved oxygen, and temperature monitoring)
Columbia River, Wahkiakum County (Eurasian Watermilfoil Control)
Dissolved Oxygen Monitoring after 2,4-D Treatment
Fluridone Residue Monitoring
The strategy for fluridone treatments differs from other herbicides since the
herbicide is deliberately maintained in the water at low concentrations for ten
to twelve weeks during the treatment season.
Pipe and Lucerne Lakes, King County - Hydrilla Eradication Project
Diquat Residue Monitoring
Big Bow Lake, Douglas County
Battle Ground Lake, Clark County
Dissolved Oxygen Monitoring after Diquat Treatment
Glyphosate and Imazapyr Residue Monitoring
Spring Lake, King County
Spartina Monitoring - Willapa Bay, Puget Sound
Emergent Weed Monitoring (Statewide)
For more information contact Kathy Hamel -
kham461@ecy.wa.gov
Copyright © Washington State Department of Ecology. See http://www.ecy.wa.gov/copyright.html.
