- Contact information
- 
                                            For information on Lakes in Wisconsin, contact: 
- DNR Lake
 Division of Water
 Bureau of Water Quality
 
- Clean Boats, Clean Waters Contacts
 
 
                                
                                
                                
                                
                                
                                
                                
                                
                                    
                                    Lake Winnebago -- Fond Du Lac - Lakeside West Park - Supple Marsh
                                    
                                
                                
                                
                                
                                
     
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  Contacted — % responses by year (2014-2025)
  
 
  Willing to Answer Questions — % by Year (2014-2025)
  
 
  Boat Used Past 5 Days On Different Waterbody? (2019-2025)
  
 
       
  Feel Confident Boater Understands (2014-2017)
  
 
     
    
      
    
    
    
    
    
    
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    Lake Winnebago has the following aquatic invasive species: 
Asiatic Clam (Corbicula), Chinese Mystery Snail, Curly-Leaf Pondweed, Eurasian Water-Milfoil, Faucet Snail, Flowering Rush, Hybrid Eurasian / Northern Water-Milfoil, Phragmites (non-native), Purple Loosestrife, Rusty Crayfish, Spiny Waterflea, Zebra Mussel