Here are the top 50 wastewater treatment plants in the United States, based on the population served:
1. Hyperion Treatment Plant (Los Angeles, CA)
2. Deer Island Sewage Treatment Plant (Boston, MA)
3. Stickney Water Reclamation Plant (Chicago, IL)
4. Blue Plains Advanced Wastewater Treatment Plant (Washington, D.C.)
5. Newtown Creek Wastewater Treatment Plant (New York, NY)
6. North Regional Wastewater Treatment Plant (Miami, FL)
7. Point Loma Wastewater Treatment Plant (San Diego, CA)
8. 26th Ward Wastewater Treatment Plant (New York, NY)
9. Hunts Point Wastewater Treatment Plant (New York, NY)
10. Wards Island Wastewater Treatment Plant (New York, NY)
11. Donald C. Tillman Water Reclamation Plant (Los Angeles, CA)
12. Bowery Bay Wastewater Treatment Plant (New York, NY)
13. Southerly Wastewater Treatment Plant (Cleveland, OH)
14. Trinity River Authority Central Regional Wastewater System (Dallas, TX)
15. Joint Water Pollution Control Plant (Carson, CA)
16. Passaic Valley Sewerage Commission (Newark, NJ)
17. City of Philadelphia Water Department, Northeast Water Pollution Control Plant (Philadelphia, PA)
18. Orange County Sanitation District, Plant No. 1 (Fountain Valley, CA)
19. City of Detroit Water and Sewerage Department, Wastewater Treatment Plant (Detroit, MI)
20. East Bay Municipal Utility District, Main Wastewater Treatment Plant (Oakland, CA)
21. San Jose-Santa Clara Regional Wastewater Facility (San Jose, CA)
22. Sacramento Regional Wastewater Treatment Plant (Elk Grove, CA)
23. Almeda Sims Regional Wastewater Treatment Plant (Houston, TX)
24. North Side Water Reclamation Plant (Skokie, IL)
25. 69th Street Wastewater Treatment Plant (Upper Darby, PA)
26. Central District Wastewater Treatment Facility (Miami, FL)
27. Western Regional Wastewater Treatment Plant (Boynton Beach, FL)
28. City and County of Honolulu, Sand Island Wastewater Treatment Plant (Honolulu, HI)
29. Robert W. Hite Treatment Facility (Denver, CO)
30. Mill Creek Wastewater Treatment Plant (Cincinnati, OH)
31. South District Wastewater Treatment Plant (Miami, FL)
32. Calumet Water Reclamation Plant (Chicago, IL)
33. North Regional Wastewater Treatment Plant (Broward County, FL)
34. Allegheny County Sanitary Authority, Wastewater Treatment Plant (Pittsburgh, PA)
35. East Water Purification Plant (Houston, TX)
36. North Durham Water Reclamation Facility (Durham, NC)
37. Metropolitan Wastewater Treatment Plant (St. Paul, MN)
38. 91st Avenue Wastewater Treatment Plant (Phoenix, AZ)
39. George W. Kuhn Retention Treatment Basin (Detroit, MI)
40. South Shore Water Reclamation Facility (Milwaukee, WI)
41. Pima County Wastewater Reclamation Facility (Tucson, AZ)
42. McAlpine Creek Wastewater Management Facility (Charlotte, NC)
43. Tres Rios Water Reclamation Facility (Phoenix, AZ)
44. Niagara Falls Wastewater Treatment Plant (Niagara Falls, NY)
45. Upper Occoquan Service Authority Regional Water Reclamation Plant (Centreville, VA)
46. Western Branch Wastewater Treatment Plant (Upper Marlboro, MD)
47. Sod Run Wastewater Treatment Plant (Philadelphia, PA)
48. Valley Creek Wastewater Treatment Plant (Birmingham, AL)
49. Village Creek Wastewater Treatment Plant (Fort Worth, TX)
50. Papillion Creek Water Resource Recovery Facility (Omaha, NE)