| Size (Peak day design capacity, gallons per day) - 100,001 - 500,000 | 9 |
| Secondary Treatment - Stabilization ponds without aeration | 5 |
| Disinfection - Liquid and powdered hypochlorites | 3 |
| Disinfection - Dechlorination with dechlorination agents other than gas | 3 |
| Effluent Discharge - Effluent aeration | 2 |