The 50 largest wastewater treatment plants in Alabama
Ranked by average flow · 250 MGD combined · 87% of the state's reported flow
Valley Creek Wastewater Treatment Plant in Bessemer is the largest publicly owned wastewater treatment plant in Alabama by reported average flow, treating about 37.73 million gallons per day. The 50 plants below treat 250 MGD between them, 87% of the flow reported by all 257 plants in the state, and serve about 1,541,514 people. Every plant links to its profile with permit and compliance data. Treatment technology is shown with a free Klarifi account.
| # | Facility | City | Avg flow (MGD) | Population | NPDES permit | Expires | Violations (3y) |
|---|---|---|---|---|---|---|---|
| 1 | Valley Creek Wastewater Treatment Plant | Bessemer | 37.73 | 214,985 | ALL023655 | Dec 2030 | 1 |
| 2 | Village Creek WWTP | Birmingham | 24.6 | 81,595 | ALL023647 | Dec 2030 | 6 |
| 3 | Clifton C. Williams Wastewater Treatment Facility | Mobile | 19.38 | 140,000 | AL0023086 | Jun 2025 | 60 |
| 4 | Tuscaloosa WWTP | Tuscaloosa | 18.58 | 100,618 | AL0022713 | Feb 2028 | 99 |
| 5 | Montgomery Enconchate WWTP | Montgomery | 12.66 | 75,100 | AL0022225 | May 2031 | 1 |
| 6 | City Of Huntsville | Madison | 11.76 | 78,488 | AL0049531 | Jun 2030 | 2 |
| 7 | Five Mile Creek Wastewater Treatment Plant | Fultondale | 11.64 | 76,570 | AL0026913 | Jun 2026 | 1 |
| 8 | Wright Smith Jr Wastewater Treatment Facility | Mobile | 8.31 | 60,000 | AL0023094 | Nov 2018 | 6 |
| 9 | Albertville Waste Water Treatment Plant | Albertville | 7.76 | 21,541 | AL0020192 | Apr 2027 | 21 |
| 10 | Cypress Creek WWTP | Florence | 6.86 | 33,933 | AL0023884 | Dec 2026 | 4 |
| 11 | Gadsden West River WWTP | Gadsden | 6.1 | 22,780 | AL0053201 | Jul 2030 | 40 |
| 12 | Aldridge Creek Wastewater Treatment Plant | Huntsville | 4.97 | 40,250 | AL0056855 | Feb 2027 | 0 |
| 13 | Jasper Town Creek WWTP | Jasper | 4.17 | 14,350 | AL0023418 | Sep 2029 | 2 |
| 14 | Alabaster WWTP | Alabaster | 3.91 | 32,340 | AL0025828 | Nov 2029 | 1 |
| 15 | Turkey Creek WWTP | Pinson | 3.88 | 20,468 | AL0022926 | Jun 2026 | 1 |
| 16 | Phenix City Wastewater Treatment Plant | Phenix City | 3.85 | 28,847 | AL0022209 | Jul 2026 | 244 |
| 17 | Eastlake Wastewater Plant | Guntersville | 3.32 | 8,553 | AL0020150 | Aug 2027 | 12 |
| 18 | Walnut Creek WWTP | Troy | 3.11 | 19,500 | AL0032310 | Nov 2029 | 22 |
| 19 | Opelika Westside WWTP | Opelika | 3.03 | 19,845 | AL0050130 | Mar 2028 | 5 |
| 20 | Cahaba River Wastewater Treatment Plant | Hoover | 2.98 | 78,289 | ALL023027 | Dec 2030 | 1 |
| 21 | Slab Creek Wastewater Treatment Plant | Boaz | 2.72 | 9,551 | AL0049603 | Jun 2026 | 45 |
| 22 | Russellville WWTP | Russellville | 2.63 | 10,100 | AL0027987 | Jul 2027 | 5 |
| 23 | City Of Orange Beach | Orange Beach | 2.62 | 8,347 | AL0081124 | Apr 2031 | 7 |
| 24 | J. E. Ham WWTP | Sylacauga | 2.56 | 11,949 | AL0020001 | Jun 2030 | 0 |
| 25 | Northport Wastewater Treatment Plant | N Port | 2.55 | 26,249 | AL0064394 | Nov 2025 | 27 |
| 26 | Big Cove WWTP | Brownsboro | 2.53 | 21,550 | AL0055042 | May 2028 | 1 |
| 27 | Trussvillle WWTP | Trussville | 2.53 | 15,609 | ALL022934 | Dec 2030 | 3 |
| 28 | City Of Union Springs Utilities Board | Union Springs | 2.43 | 3,314 | AL0060445 | Apr 2026 | 100 |
| 29 | Foley WWTP | Foley | 2.3 | 22,063 | AL0049042 | Oct 2027 | 2 |
| 30 | Lanett WWTP City Of | Lanett | 1.87 | 6,773 | AL0023159 | Nov 2025 | 24 |
| 31 | New Market Wastewater Mgmt Facility | New Market | 1.84 | 24,150 | AL0057428 | Nov 2026 | 2 |
| 32 | Jacksonville WWTP | Jacksonville | 1.66 | 12,373 | AL0022586 | Jul 2027 | 0 |
| 33 | Utilities Board Of The City Of Tuskegee | Tuskegee | 1.62 | 8,469 | AL0048763 | Apr 2031 | 33 |
| 34 | Fort Payne Wastewater Treatment Plant | Fort Payne | 1.59 | 14,877 | AL0023311 | Mar 2024 | 8 |
| 35 | Helena WWTP | Helena | 1.59 | 20,914 | AL0023116 | May 2030 | 37 |
| 36 | Millbrook WWTP | Millbrook | 1.54 | 16,564 | AL0049921 | Apr 2028 | 0 |
| 37 | Dothan Cypress Creek WWTP | Dothan | 1.51 | 9,716 | AL0072737 | Sep 2027 | 1 |
| 38 | Dye Creek Wastewater Treatment Plt | Pell City | 1.39 | 13,248 | AL0045993 | Jul 2026 | 0 |
| 39 | Stanley Brooks WWTP | Prichard | 1.34 | 9,661 | AL0055204 | May 2025 | 175 |
| 40 | Leeds Norman R Skinner WWTP | Leeds | 1.22 | 8,543 | AL0067067 | Dec 2027 | 3 |
| 41 | Bridgeport Utilities Board | Bridgeport | 1.21 | 2,300 | AL0020991 | Dec 2028 | 5 |
| 42 | Lincoln South WWTP | Lincoln | 1.17 | 6,805 | AL0054356 | Aug 2028 | 2 |
| 43 | Alexander City Coley Creek WWTP | Alexander City | 1.15 | 12,811 | AL0021156 | Mar 2029 | 2 |
| 44 | Rainbow City Lagoon | Rainbow City | 1.15 | 4,080 | AL0056839 | Oct 2026 | 0 |
| 45 | Saraland Wastewater Treatment Plant | Saraland | 1.14 | 16,171 | AL0055786 | Mar 2022 | 17 |
| 46 | City Of Hoover | Hoover | 1.1 | 15,295 | AL0041653 | Sep 2028 | 0 |
| 47 | Harry Still Sr WWTP | Bay Minette | 1.08 | 22,000 | AL0049867 | Dec 2027 | 3 |
| 48 | Robertsdale WWTP | Robertsdale | 1.06 | 8,490 | AL0042838 | Apr 2029 | 1 |
| 49 | Piedmont Lagoon | Piedmont | 0.93 | 8,340 | AL0024376 | Apr 2029 | 38 |
| 50 | Greensboro Lagoon | Greensboro | 0.92 | 3,150 | AL0057193 | Jul 2026 | 19 |
Treatment technology for each plant is shown with a free Klarifi account. Create one →
Largest plants in Alabama: questions
Sources and methodology
Flow, permit and violation figures come from the EPA's ICIS-NPDES discharge monitoring records. Population served comes from the Clean Watersheds Needs Survey 2022. Treatment structures are identified by Klarifi's review of aerial imagery, and capital improvement projects are extracted from published municipal budget documents. Violations are counted over the last three years of monitoring reports.
Data refreshed October 26, 2026.
Wastewater terms: WWTP · POTW · MGD · NPDES permit · Significant industrial user · Biosolids · all terms
Cite this page
Journalists, researchers and educators are welcome to quote these figures. Please credit Klarifi as the source and link to this page.
Klarifi. “The 50 largest wastewater treatment plants in Alabama (2026).” Updated October 26, 2026. https://klarifi.io/facilities/alabama/largestNeed a custom cut of the data for a state, a county or a list of plants? Email info@klarifi.io.