Letters of Approval
from the
State of Washington
Department of Ecology
Wastewater Certification Program
Current Course Approvals 2026 to 2029
BNR Process Control & Troubleshooting
Activated Sludge Module 1 ... Basic Concepts                      
Activated Sludge Module 2 ... Flow Patterns                      
Activated Sludge Module 3 ... Loading Rates                      
Activated Sludge Module 4 ... Microbiology                      
Activated Sludge Module 5 ... Troubleshooting                      
Sludge Dewatering Module                      
Preliminary & Primary Treatment                      
Basic Safety                      
Basic Hydraulics                      
Sludge Digestion Module                      
Sludge Thickening Module                      
Basic Math                      
Chlorination Principles, Safety & Process                      
So You Want to be a Utility Manager                      
Wastewater Treatment Overview    
Wastewater Treatment Concepts    
Activated Sludge & BNR Workshop    
Lift Stations Overview    
Wastewater Operator Study Guide Module 1    
Wastewater Operator Study Guide Module 2    
Wastewater Operator Study Guide Module 3    
Wastewater Operator Workshop Mission Math    
Effluent Filtration    
Basic Instrumentation
History of Assets