What is the largest wastewater treatment plant in Alabama?

Valley Creek Wastewater Treatment Plant in Bessemer, treating an average of 29.2 MGD under NPDES permit ALL023655. Tuscaloosa WWTP in Tuscaloosa is second at 17.05 MGD.

How much wastewater do Alabama’s largest plants treat?

The 50 largest plants treat 177 MGD combined, 88% of the flow reported by all 253 publicly owned plants in Alabama.

How is plant size measured?

By reported average daily flow in million gallons per day (MGD) from EPA discharge monitoring reports, the standard measure of a plant’s size. Design capacity, the flow a plant is permitted to treat, is usually higher and is shown on each profile.

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The 50 largest wastewater treatment plants in Alabama

Name: Largest wastewater treatment plants in Alabama
Creator: Klarifi
License: https://klarifi.io/terms-of-service

Ranked by average flow · 177 MGD combined · 88% 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 29.2 million gallons per day. The 50 plants below treat 177 MGD between them, 88% of the flow reported by all 253 plants in the state, and serve about 1,325,291 people. Every plant links to its profile with permit, technology and compliance data.

All plants in Alabama →The 100 largest US plants →Alabama NPDES permits →

The 50 largest publicly owned wastewater treatment plants in Alabama by average flow (MGD), with population served, NPDES permit, expiry, treatment technology and three-year violation count.
#	Facility	City	Avg flow (MGD)	Population	NPDES permit	Expires	Technology	Violations (3y)
1	Valley Creek Wastewater Treatment Plant	Bessemer	29.2	214,985	ALL023655	Dec 2030	Clarifiers, Biogas silos, Biogas balloons	1
2	Tuscaloosa WWTP	Tuscaloosa	17.05	100,618	AL0022713	Feb 2028	Clarifiers, Biogas silos	94
3	Village Creek WWTP	Birmingham	13.4	81,595	ALL023647	Dec 2030	Clarifiers, Biogas silos, Biogas balloons	6
4	Montgomery Enconchate WWTP	Montgomery	12.7	75,100	AL0022225	May 2031	Clarifiers, Biogas silos	1
5	City Of Huntsville	Madison	10.29	78,488	AL0049531	Jun 2030	Clarifiers, Aerated lagoons, Uncovered lagoons, Carrousels / oxidation ditches	2
6	Wright Smith Jr Wastewater Treatment Facility	Mobile	7.48	60,000	AL0023094	Nov 2018	Clarifiers, Biogas silos	6
7	Albertville Waste Water Treatment Plant	Albertville	6.44	21,541	AL0020192	Apr 2027	Clarifiers, Uncovered lagoons, Biogas silos, Biogas balloons	24
8	Five Mile Creek Wastewater Treatment Plant	Fultondale	6.1	76,570	AL0026913	Jun 2026	Clarifiers, Aerated lagoons, Uncovered lagoons	1
9	Cypress Creek WWTP	Florence	5.14	33,933	AL0023884	Dec 2026	Clarifiers, Aerated lagoons, Biogas silos	4
10	Gadsden West River WWTP	Gadsden	4.15	22,780	AL0053201	Jul 2030	Clarifiers, Biogas silos	40
11	Aldridge Creek Wastewater Treatment Plant	Huntsville	4.06	40,250	AL0056855	Feb 2027	Clarifiers, Carrousels / oxidation ditches, Biogas silos	0
12	City Of Orange Beach	Orange Beach	3.36	8,347	AL0081124	Apr 2031	—	7
13	Phenix City Wastewater Treatment Plant	Phenix City	3.25	28,847	AL0022209	Jul 2026	Clarifiers, Uncovered lagoons, Biogas silos	254
14	Walnut Creek WWTP	Troy	3.06	19,500	AL0032310	Nov 2029	Clarifiers, Carrousels / oxidation ditches	20
15	Alabaster WWTP	Alabaster	2.95	32,340	AL0025828	Nov 2029	Clarifiers, Carrousels / oxidation ditches	1
16	Eastlake Wastewater Plant	Guntersville	2.78	8,553	AL0020150	Aug 2027	Clarifiers	12
17	Opelika Westside WWTP	Opelika	2.75	19,845	AL0050130	Mar 2028	Clarifiers, Carrousels / oxidation ditches	6
18	Turkey Creek WWTP	Pinson	2.7	20,468	AL0022926	Jun 2026	Clarifiers, Aerated lagoons, Carrousels / oxidation ditches	1
19	Jasper Town Creek WWTP	Jasper	2.6	14,350	AL0023418	Sep 2029	Clarifiers, Aerated lagoons, Uncovered lagoons, Carrousels / oxidation ditches, Biogas silos	2
20	Foley WWTP	Foley	2.07	22,063	AL0049042	Oct 2027	Aerated lagoons, Carrousels / oxidation ditches	1
21	City Of Union Springs Utilities Board	Union Springs	2	3,314	AL0060445	Apr 2026	Uncovered lagoons	101
22	Trussvillle WWTP	Trussville	2	15,609	ALL022934	Dec 2030	Clarifiers, Carrousels / oxidation ditches	3
23	Northport Wastewater Treatment Plant	N Port	1.98	26,249	AL0064394	Nov 2025	Clarifiers, Carrousels / oxidation ditches	27
24	Russellville WWTP	Russellville	1.84	10,100	AL0027987	Jul 2027	Clarifiers, Uncovered lagoons, Carrousels / oxidation ditches	5
25	Big Cove WWTP	Brownsboro	1.57	21,550	AL0055042	May 2028	Clarifiers, Carrousels / oxidation ditches	1
26	Lanett WWTP City Of	Lanett	1.57	6,773	AL0023159	Nov 2025	Clarifiers, Aerated lagoons	24
27	J. E. Ham WWTP	Sylacauga	1.57	11,949	AL0020001	Jun 2030	Clarifiers, Aerated lagoons, Uncovered lagoons	0
28	Utilities Board Of The City Of Tuskegee	Tuskegee	1.4	8,469	AL0048763	Apr 2031	Clarifiers	33
29	Dothan Cypress Creek WWTP	Dothan	1.39	9,716	AL0072737	Sep 2027	Clarifiers, Carrousels / oxidation ditches	1
30	Millbrook WWTP	Millbrook	1.31	16,564	AL0049921	Apr 2028	Clarifiers, Carrousels / oxidation ditches	0
31	New Market Wastewater Mgmt Facility	New Market	1.28	24,150	AL0057428	Nov 2026	Clarifiers, Carrousels / oxidation ditches	2
32	Fort Payne Wastewater Treatment Plant	Fort Payne	1.27	14,877	AL0023311	Mar 2024	Clarifiers, Carrousels / oxidation ditches	8
33	Slab Creek Wastewater Treatment Plant	Boaz	1.21	9,551	AL0049603	Jun 2026	Clarifiers, Biogas silos	50
34	Jacksonville WWTP	Jacksonville	1.2	12,373	AL0022586	Jul 2027	—	0
35	Tuscumbia WWTP	Tuscumbia	1.12	9,054	AL0057100	Nov 2027	Clarifiers	6
36	Robertsdale WWTP	Robertsdale	1.1	8,490	AL0042838	Apr 2029	Uncovered lagoons	1
37	Saraland Wastewater Treatment Plant	Saraland	1.1	16,171	AL0055786	Mar 2022	Aerated lagoons, Uncovered lagoons	17
38	Helena WWTP	Helena	1.04	20,914	AL0023116	May 2030	Clarifiers, Carrousels / oxidation ditches	38
39	Dye Creek Wastewater Treatment Plt	Pell City	0.95	13,248	AL0045993	Jul 2026	Clarifiers, Carrousels / oxidation ditches	0
40	Lincoln South WWTP	Lincoln	0.94	6,805	AL0054356	Aug 2028	Clarifiers, Carrousels / oxidation ditches	2
41	Stanley Brooks WWTP	Prichard	0.9	9,661	AL0055204	May 2025	—	175
42	Satsuma Wastewater Treatment Facility	Satsuma	0.85	6,749	AL0063002	Sep 2029	Aerated lagoons	47
43	City Of Hoover	Hoover	0.82	15,295	AL0041653	Sep 2028	Clarifiers, Uncovered lagoons, Carrousels / oxidation ditches	0
44	Piedmont Lagoon	Piedmont	0.8	8,340	AL0024376	Apr 2029	Clarifiers, Aerated lagoons	37
45	Ashland City Of Water Works And Sewer Bd (wwtp)	Ashland	0.78	1,969	AL0020141	Nov 2027	Clarifiers, Aerated lagoons	4
46	Leeds Norman R Skinner WWTP	Leeds	0.78	8,543	AL0067067	Dec 2027	Clarifiers, Aerated lagoons, Carrousels / oxidation ditches	3
47	Milley'S Creek WPCP	Pike Road	0.75	15,000	AL0082431	Nov 2025	—	1
48	Montevallo Water And Sewer Board	Montevallo	0.74	7,255	AL0023299	Mar 2027	—	1
49	Bridgeport Utilities Board	Bridgeport	0.66	2,300	AL0020991	Dec 2028	Aerated lagoons	9
50	Rainbow City Lagoon	Rainbow City	0.64	4,080	AL0056839	Oct 2026	Uncovered lagoons	0

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 September 11, 2026.

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