Lagoon systems: wastewater treatment plants in Nebraska
82 plants · 47% of the state · 32 MGD reported by 31 plants
Klarifi identifies 82 publicly owned wastewater treatment plants with lagoon systems in Nebraska, 47% of the 175 plants in the state (32 MGD reported by 31 plants). The largest is Grand Island Wastewater Trtmnt in Grand Island at 10.67 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 | 10.67 | NE0043702 | Dec 2024 | 11 |
| 2 | Fremont Wastewater Treatment | Fremont | 5.68 | NE0031381 | Sep 2029 | 0 |
| 3 | Hastings Pollution Control Ctr | Hastings | 3.41 | NEL038946 | Dec 2030 | 0 |
| 4 | City Of South Sioux City | South Sioux City | 2.27 | NE0139904 | Mar 2028 | 86 |
| 5 | Tecumseh Waste Water Treatment Facility | Tecumseh | 1.06 | NE0030911 | Dec 2026 | 12 |
| 6 | David City Wastewater Treatment Facility | David City | 0.92 | NE0021199 | Jun 2031 | 30 |
| 7 | Falls City Wastewater Treatment Facility | Falls City | 0.86 | NE0021148 | Mar 2031 | 7 |
| 8 | Aurora Burn Site | Aurora | 0.78 | NE0031810 | Mar 2028 | 14 |
| 9 | Ogallala Burn Site No 1 | Ogallala | 0.58 | NE0040045 | Sep 2029 | 122 |
| 10 | Sidney Wastewater Treatment Facility | Sidney | 0.55 | NE0023884 | Mar 2028 | 4 |
| 11 | Chadron Wastewater Treatment Facility | Chadron | 0.54 | NE0029190 | Dec 2029 | 79 |
| 12 | Broken Bow Wastewater Treatment Facility | Broken Bow | 0.46 | NE0027260 | Mar 2031 | 1 |
| 13 | West Point Burn Site | West Point | 0.45 | NE0023965 | Dec 2027 | 1 |
| 14 | Madison Waste Water Treatment Facility | Madison | 0.43 | NE0049174 | Dec 2026 | 10 |
| 15 | Mccook Wastewater Treatment Facility | Mccook | 0.41 | NE0021504 | Jun 2027 | 3 |
| 16 | Fairbury Wastewater Treatment Facility | Fairbury | 0.36 | NE0024384 | Mar 2031 | 1 |
| 17 | Gothenburg Wastewater Treatment Facility | Gothenburg | 0.33 | NE0047376 | Mar 2030 | 15 |
| 18 | O'Neill Wastewater Treatment | Oneill | 0.31 | NE0049051 | Sep 2026 | 111 |
| 19 | Auburn Wastewater Treatment Facility | Auburn | 0.29 | NE0027774 | Sep 2028 | 9 |
| 20 | Valentine Water & Sewer Department | Valentine | 0.29 | NE0051489 | Sep 2028 | 0 |
| 21 | Superior Wastewater Treatment Facility | Superior | 0.24 | NE0023809 | Dec 2030 | 66 |
| 22 | Minden Wastewater Treatment Facility | Minden | 0.2 | NE0025411 | Jun 2031 | 52 |
| 23 | Battle Creek Wastewater Treatment Facility | Battle Creek | 0.18 | NE0041301 | Dec 2025 | 27 |
| 24 | St Paul Wastewater Treatment Facility | St Paul | 0.18 | NE0027324 | Mar 2028 | 22 |
| 25 | Hartington WWTP | Hartington | 0.13 | NE0049115 | Mar 2029 | 4 |
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 September 11, 2026.