| Size (Peak day design capacity, gallons per day) - 10,000 - 50,000 | 2 |
| Pretreatment - Influent pumping | 2 |
| Pretreatment - Flow equalization basin | 1 |
| Pretreatment - Fine screens, including microscreens | 3 |
| Secondary Treatment - Activated sludge: Diffused or dispersed aeration | 10 |
| Secondary Treatment - Secondary clarifiers | 4 |
| Advanced Waste Treatment - pH adjustment | 3 |
| Sludge Thickening and Dewatering - Sludge bagger | 3 |
| Sludge Stabilization and Conditioning - Aerobic digestion | 5 |
| Solids Disposal - Off-site disposal | 1 |
| Disinfection - Liquid and powdered hypochlorites | 3 |
| Disinfection - Dechlorination with dechlorination agents other than gas | 3 |
| Effluent Discharge - Plant pumping of effluent | 2 |