What is the largest wastewater treatment plant in Arkansas?

Fayetteville/ West Side WWTP in Fayetteville, treating an average of 10.18 MGD under NPDES permit ARL050288. Fort Smith, City Of - P Street Water Reclamation Facility in Fort Smith is second at 9.55 MGD.

How much wastewater do Arkansas’s largest plants treat?

The 50 largest plants treat 131 MGD combined, 83% of the flow reported by all 324 publicly owned plants in Arkansas.

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 Arkansas

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

Ranked by average flow · 131 MGD combined · 83% of the state's reported flow

Fayetteville/ West Side WWTP in Fayetteville is the largest publicly owned wastewater treatment plant in Arkansas by reported average flow, treating about 10.18 million gallons per day. The 50 plants below treat 131 MGD between them, 83% of the flow reported by all 324 plants in the state, and serve about 815,652 people. Every plant links to its profile with permit and compliance data. Treatment technology is shown with a free Klarifi account.

All plants in Arkansas →The 50 largest US plants →Arkansas NPDES permits →

The 50 largest publicly owned wastewater treatment plants in Arkansas by average flow (MGD), with population served, NPDES permit, expiry and three-year violation count.
#	Facility	City	Avg flow (MGD)	Population	NPDES permit	Expires	Violations (3y)
1	Fayetteville/ West Side WWTP	Fayetteville	10.18	49,043	ARL050288	Dec 2030	0
2	Fort Smith, City Of - P Street Water Reclamation Facility	Fort Smith	9.55	50,271	ARL033278	Dec 2030	4
3	City Of Hot Springs Regional Wastewater Treatment Plant	Hot Springs	9.53	35,536	AR0033880	Jun 2029	87
4	Fort Smith, City Of-Massard Water Reclamation Facility	Barling	8.03	40,899	AR0021750	Feb 2026	40
5	Pine Bluff WW Utility-Boyd Pt	Pine Bluff	7.33	47,850	ARL033316	Dec 2030	16
6	Lrwra-Fourche Creek Water Reclamation Facility	Little Rock	7.26	58,729	AR0040177	Jul 2025	0
7	Fayetteville - Noland WWTP	Fayetteville	6.32	57,022	AR0020010	Apr 2029	6
8	West Memphis Wastewater Treatment Facility	West Memphis	4.81	24,559	AR0022039	Oct 2029	19
9	Benton WWTP	Benton	4.49	35,011	AR0036498	Mar 2026	4
10	Northwest Arkansas Conservation Authority -Regional WWTP	Bentonville	3.99	29,333	AR0050024	Dec 2026	160
11	Jacksonville Wastewater Utility	Jacksonville	3.97	29,469	AR0041335	Jan 2029	0
12	Russellville WWTP	Russellville	3.97	30,473	ARL021768	Dec 2030	46
13	Searcy Wastewater Treatment Plant	Searcy	3.2	23,014	AR0021601	Apr 2024	12
14	Nlrwu-White Oak Bayou	North Little Rock	2.92	39,310	AR0038288	Jul 2028	0
15	Tucker Creek Wastewater Treatment Plant	Conway	2.89	14,641	ARL047279	Dec 2030	11
16	Green Forest, City Of - Green Forest WWTP	Green Forest	2.53	2,981	AR0021741	Mar 2027	0
17	Osceola WWTP	Osceola	2.49	6,976	AR0021580	Sep 2028	14
18	Dequeen, City Of	De Queen	2.24	6,098	AR0021733	Mar 2025	58
19	Mountain Home Wastewater Treatment Plant	Mountain Home	2.1	12,802	ARL021211	Dec 2030	0
20	Lrwra-Little Maumelle Water Reclamation Facility	Little Rock	2.01	14,176	AR0050849	Dec 2024	0
21	Cwl-West Side Wastewater Treatment Plant	Jonesboro	1.84	31,410	AR0037907	Mar 2028	3
22	Nlr Wastewater Utility - Maumelle Water Management	Maumelle	1.79	19,274	ARL033626	Dec 2030	0
23	Mena Wastewater Treatment Facility	Mena	1.67	5,588	AR0036692	Nov 2027	16
24	Marion, City Of	Marion	1.61	14,007	AR0021971	Dec 2028	93
25	Camden, Arkansas Water Treatment Plant	Camden	1.47	10,548	AR0022365	Dec 2028	0
26	Huntsville WWTF	Huntsville	1.36	2,808	ARL022004	Dec 2030	4
27	Sheridan WW Treatment Plant	Sheridan	1.32	4,938	AR0034347	Feb 2025	18
28	Hamburg, City Of	Hamburg	1.31	2,527	AR0034029	Oct 2027	63
29	El Dorado, City Of- South Plant	Eldorado	1.28	11,039	AR0033723	Dec 2028	27
30	Lonoke, City Of	Lonoke	1.25	4,175	AR0034746	Apr 2024	22
31	West Helena Water Utilities	West Helena	1.15	5,766	ARL022021	Dec 2030	43
32	Clarksville Connected Utilities - Pollution Control Facility	Clarksville	1.14	9,408	ARL022187	Dec 2030	2
33	Berryville, City Of-WWTP	Berryville	1.12	5,663	AR0021792	Oct 2021	1
34	Helena Water Sewer	Helena	1.1	5,567	ARL043389	Dec 2030	23
35	Greenwood, City Of	Greenwood	0.99	9,392	AR0022454	Jun 2028	11
36	Newport, City Of	Newport	0.97	7,981	AR0037044	Sep 2027	9
37	Beebe Water And Sewer Commission	Beebe	0.84	8,440	AR0022101	Jun 2029	55
38	Atkins Water Works-North WWTF	Atkins	0.84	2,853	AR0034665	Mar 2029	32
39	Blytheville Sewer Dept.-South WWTP	Blytheville	0.84	4,836	AR0022578	Jun 2024	30
40	Ozark, City Of	Ozark	0.74	3,542	AR0021563	Aug 2024	2
41	Wrightsville, City Of	Wrightsville	0.72	2,671	AR0051021	Feb 2031	90
42	Dewitt, City Of	Dewitt	0.71	2,974	AR0021431	Oct 2029	1
43	Paris WWTP	Paris	0.69	3,207	AR0021857	May 2026	31
44	Pea Ridge, City Of	Pea Ridge	0.64	6,615	AR0020672	Jun 2029	0
45	Gentry WWTP	Gentry	0.61	3,804	AR0020184	Sep 2023	58
46	Prescott WWTP	Prescott	0.59	3,069	AR0033481	Feb 2029	1
47	Booneville, City Of	Booneville	0.59	3,816	AR0021571	Mar 2029	37
48	Greenbrier Waterworks-Booster Chlorination Mm #1	Greenbrier	0.58	5,747	AR0036536	Jun 2029	50
49	Lincoln, City Of	Lincoln	0.54	2,465	AR0035246	Sep 2030	15
50	Waldron, City Of	Waldron	0.52	3,329	AR0035769	Apr 2026	34

Treatment technology for each plant is shown with a free Klarifi account. Create one →

Largest plants in Arkansas: 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 · Equalization tank · Centrate · 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. “Largest wastewater treatment plants in Arkansas (2026).” Updated October 26, 2026. https://klarifi.io/facilities/arkansas/largest

Need a custom cut of the data for a state, a county or a list of plants? Email info@klarifi.io.

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