What is the largest wastewater treatment plant in Nebraska?

Missouri River Wastewater Treatment Plant in Omaha, treating an average of 21.78 MGD under NPDES permit NEL036358. Grand Island Wastewater Trtmnt in Grand Island is second at 10.49 MGD.

How much wastewater do Nebraska’s largest plants treat?

The 50 largest plants treat 81 MGD combined, 92% of the flow reported by all 198 publicly owned plants in Nebraska.

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 Nebraska

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

Ranked by average flow · 81 MGD combined · 92% of the state's reported flow

Missouri River Wastewater Treatment Plant in Omaha is the largest publicly owned wastewater treatment plant in Nebraska by reported average flow, treating about 21.78 million gallons per day. The 50 plants below treat 81 MGD between them, 92% of the flow reported by all 198 plants in the state, and serve about 616,199 people. Every plant links to its profile with permit and compliance data. Treatment technology is shown with a free Klarifi account.

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

The 50 largest publicly owned wastewater treatment plants in Nebraska 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	Missouri River Wastewater Treatment Plant	Omaha	21.78	199,134	NEL036358	Dec 2030	0
2	Grand Island Wastewater Trtmnt	Grand Island	10.49	52,335	NE0043702	Dec 2024	11
3	Fremont Wastewater Treatment	Fremont	5.32	30,949	NE0031381	Sep 2029	0
4	Lincoln Northeast Wastewater Treatment Facility	Lincoln	4.14	54,712	NE0112488	Dec 2030	0
5	Kearney Wastewater Treatment	Kearney	3.57	33,959	NE0052647	Jun 2028	4
6	Hastings Pollution Control Ctr	Hastings	3.25	24,878	NEL038946	Dec 2030	0
7	City Of Columbus - Wastewater Treatment Facility	Columbus	3.02	24,123	NE0035025	Jun 2030	4
8	City Of Norfolk Waste Facility	Norfolk	2.91	24,410	NEL033421	Dec 2030	4
9	City Of South Sioux City	South Sioux City	2.27	—	NE0139904	Mar 2028	96
10	Schuyler Wastewater Treatment	Schuyler	2.1	6,303	NE0042358	Jun 2030	0
11	Tekamah Wastewater Treatment	Tekamah	1.71	1,736	NE0123072	Mar 2027	4
12	Lexington Wastewater Treatment	Lexington	1.34	10,348	NE0042668	Jun 2031	17
13	Beatrice Wastewater Treatment	Beatrice	1.13	13,243	NE0020915	Jun 2028	9
14	York Wastewater Treatment	York	1.04	7,766	NE0040932	Mar 2029	0
15	Blair Wastewater Treatment	Blair	0.98	8,258	NE0021482	Dec 2029	0
16	Tecumseh Waste Water Treatment Facility	Tecumseh	0.81	1,532	NE0030911	Dec 2026	12
17	Aurora Burn Site	Aurora	0.78	4,523	NE0031810	Mar 2028	0
18	Seward Waste & Potable Water	Seward	0.7	6,964	NE0023876	Jun 2029	1
19	David City Wastewater Treatment Facility	David City	0.7	2,841	NE0021199	Jun 2031	30
20	Crete WWTF	Crete	0.7	6,960	NE0034304	Mar 2029	2
21	Ord WWTF	Ord	0.68	2,076	NE0024392	Mar 2030	2
22	Falls City Wastewater Treatment Facility	Falls City	0.6	4,325	NE0021148	Mar 2031	7
23	Ogallala Burn Site No 1	Ogallala	0.59	4,737	NE0040045	Sep 2029	101
24	Chadron Wastewater Treatment Facility	Chadron	0.54	5,482	NE0029190	Dec 2029	79
25	Plattsmouth Wastewater Treatment Facility	Plattsmouth	0.53	—	NE0140295	Jun 2030	8
26	Sidney Wastewater Treatment Facility	Sidney	0.52	6,735	NE0023884	Mar 2028	4
27	Waverly Wastewater Treatment Facility	Waverly	0.52	3,941	NE0024406	Dec 2030	8
28	Loup City Wastewater Treatment	Loup City	0.5	1,100	NE0045250	Mar 2027	6
29	Holdrege Wastewater Treatment	Holdrege	0.47	5,406	NE0021202	Mar 2030	70
30	Wayne Wastewater Treatment	Wayne	0.46	5,660	NE0033111	Sep 2031	0
31	Gering Wastewater Treatment Facility	Gering	0.46	9,377	NE0027936	Mar 2030	1
32	Mccook Wastewater Treatment Facility	Mccook	0.41	7,698	NE0021504	Jun 2027	3
33	Cozad WWTF	Cozad	0.41	3,977	NE0112828	Mar 2030	13
34	West Point Burn Site	West Point	0.39	3,282	NE0023965	Dec 2027	1
35	Broken Bow Wastewater Treatment Facility	Broken Bow	0.38	3,559	NE0027260	Mar 2031	1
36	Madison Waste Water Treatment Facility	Madison	0.35	2,392	NE0049174	Dec 2026	10
37	Bridgeport Wastewater Treatment Facility	Bridgeport	0.34	1,656	NE0112119	Dec 2030	8
38	Fairbury Wastewater Treatment Facility	Fairbury	0.34	3,942	NE0024384	Mar 2031	1
39	Hickman Wastewater Treatment Facility	Hickman	0.33	2,432	NE0046183	Dec 2030	15
40	Lyons Wastewater Treatment Facility	Lyons	0.31	799	NE0049182	Sep 2030	0
41	Humboldt Wastewater Treatment Facility	Humboldt	0.31	913	NE0031844	Dec 2026	178
42	O'Neill Wastewater Treatment	Oneill	0.3	3,615	NE0049051	Sep 2031	147
43	Wahoo Wastewater Treatment Facility	Wahoo	0.3	4,508	NE0021679	Jun 2027	15
44	Ashland Wastewater Treatment Facility	Ashland	0.29	2,834	NE0026107	Jun 2028	17
45	Valentine Water & Sewer Department	Valentine	0.27	2,737	NE0051489	Sep 2028	0
46	Central City WWTF	Central City	0.24	2,906	NE0025445	Sep 2027	0
47	Exeter WWTF	Exeter	0.24	562	NE0040941	Sep 2027	3
48	Crawford Wastewater Treatment Facility	Crawford	0.23	1,114	NE0039799	Dec 2026	3
49	Sutherland Wastewater Treatment Facility	Sutherland	0.22	—	NE0139653	Jun 2031	19
50	Auburn Wastewater Treatment Facility	Auburn	0.22	3,460	NE0027774	Sep 2028	11

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

Largest plants in Nebraska: 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 · Activated sludge · Oxidation ditch · 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 Nebraska (2026).” Updated October 26, 2026. https://klarifi.io/facilities/nebraska/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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