Lagoon systems: wastewater treatment plants in Nebraska
76 plants · 38% of the state · 30 MGD reported by 41 plants
Klarifi identifies 76 publicly owned wastewater treatment plants with lagoon systems in Nebraska, 38% of the 198 plants in the state (30 MGD reported by 41 plants). The largest is Grand Island Wastewater Trtmnt in Grand Island at 10.49 MGD.
Lagoon systems treat wastewater in large earthen ponds over weeks of retention time, with or without mechanical aeration. They serve thousands of small towns because they are cheap to run, but they struggle with ammonia and nutrient limits, fill with sludge over decades and are the plants most often converted or upgraded when a permit is renewed.
The largest lagoons in Nebraska
| # | Facility | City | Avg flow (MGD) | NPDES permit | Expires | Violations (3y) |
|---|---|---|---|---|---|---|
| 1 | Grand Island Wastewater Trtmnt | Grand Island | 10.49 | NE0043702 | Dec 2024 | 11 |
| 2 | Fremont Wastewater Treatment | Fremont | 5.32 | NE0031381 | Sep 2029 | 0 |
| 3 | Hastings Pollution Control Ctr | Hastings | 3.25 | NEL038946 | Dec 2030 | 0 |
| 4 | City Of South Sioux City | South Sioux City | 2.27 | NE0139904 | Mar 2028 | 96 |
| 5 | Tecumseh Waste Water Treatment Facility | Tecumseh | 0.81 | NE0030911 | Dec 2026 | 12 |
| 6 | Aurora Burn Site | Aurora | 0.78 | NE0031810 | Mar 2028 | 0 |
| 7 | David City Wastewater Treatment Facility | David City | 0.7 | NE0021199 | Jun 2031 | 30 |
| 8 | Ogallala Burn Site No 1 | Ogallala | 0.59 | NE0040045 | Sep 2029 | 101 |
| 9 | Chadron Wastewater Treatment Facility | Chadron | 0.54 | NE0029190 | Dec 2029 | 79 |
| 10 | Loup City Wastewater Treatment | Loup City | 0.5 | NE0045250 | Mar 2027 | 6 |
Contacts and project signals for every plant on this list
Klarifi adds verified decision-maker contacts, permit limits, discharge monitoring data and the capital projects planned in each city, filterable by technology, size and compliance record.
Other technologies in Nebraska
Lagoon systems in other states
Lagoon systems 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 · Biosolids · Ozonation · Activated sludge · all terms