Activated sludge and clarifiers: wastewater treatment plants in Nebraska
47 plants · 27% of the state · 72 MGD reported by 46 plants
Klarifi identifies 47 publicly owned wastewater treatment plants with activated sludge and clarifiers in Nebraska, 27% of the 175 plants in the state (72 MGD reported by 46 plants). The largest is Missouri River Wastewater Treatment Plant in Omaha at 23.36 MGD.
Activated sludge is the standard mechanical process for cities: aeration basins where bacteria consume organic matter, followed by clarifiers that settle the biomass out. These plants are identified by their circular or rectangular clarifiers and by the suspended-growth process code, and they are the main market for blowers, diffusers, clarifier mechanisms and instrumentation.
The largest activated sludge plants in Nebraska
| # | Facility | City | Avg flow (MGD) | NPDES permit | Expires | Violations (3y) |
|---|---|---|---|---|---|---|
| 1 | Missouri River Wastewater Treatment Plant | Omaha | 23.36 | NEL036358 | Dec 2030 | 0 |
| 2 | Grand Island Wastewater Trtmnt | Grand Island | 10.67 | NE0043702 | Dec 2024 | 11 |
| 3 | Fremont Wastewater Treatment | Fremont | 5.68 | NE0031381 | Sep 2029 | 0 |
| 4 | Lincoln Northeast Wastewater Treatment Facility | Lincoln | 4.12 | NE0112488 | Dec 2030 | 0 |
| 5 | Kearney Wastewater Treatment | Kearney | 4.06 | NE0052647 | Jun 2028 | 4 |
| 6 | City Of Columbus - Wastewater Treatment Facility | Columbus | 3.67 | NE0035025 | Jun 2030 | 4 |
| 7 | Hastings Pollution Control Ctr | Hastings | 3.41 | NEL038946 | Dec 2030 | 0 |
| 8 | City Of Norfolk Waste Facility | Norfolk | 3.31 | NEL033421 | Dec 2030 | 4 |
| 9 | Blair Wastewater Treatment | Blair | 1.2 | NE0021482 | Dec 2029 | 0 |
| 10 | Beatrice Wastewater Treatment | Beatrice | 1.06 | NE0020915 | Jun 2028 | 9 |
| 11 | Tecumseh Waste Water Treatment Facility | Tecumseh | 1.06 | NE0030911 | Dec 2026 | 12 |
| 12 | Nebraska City WWTP | Nebraska City | 0.9 | NE0021245 | Dec 2028 | 4 |
| 13 | Aurora Burn Site | Aurora | 0.78 | NE0031810 | Mar 2028 | 14 |
| 14 | Seward Waste & Potable Water | Seward | 0.78 | NE0023876 | Jun 2029 | 2 |
| 15 | Crete WWTF | Crete | 0.71 | NE0034304 | Mar 2029 | 2 |
| 16 | Ogallala Burn Site No 1 | Ogallala | 0.58 | NE0040045 | Sep 2029 | 122 |
| 17 | Wayne Wastewater Treatment | Wayne | 0.58 | NE0033111 | Sep 2026 | 0 |
| 18 | Sidney Wastewater Treatment Facility | Sidney | 0.55 | NE0023884 | Mar 2028 | 4 |
| 19 | Cozad WWTF | Cozad | 0.48 | NE0112828 | Mar 2030 | 13 |
| 20 | Holdrege Wastewater Treatment | Holdrege | 0.48 | NE0021202 | Mar 2030 | 72 |
| 21 | Madison Waste Water Treatment Facility | Madison | 0.43 | NE0049174 | Dec 2026 | 10 |
| 22 | Mccook Wastewater Treatment Facility | Mccook | 0.41 | NE0021504 | Jun 2027 | 3 |
| 23 | Wahoo Wastewater Treatment Facility | Wahoo | 0.38 | NE0021679 | Jun 2027 | 15 |
| 24 | Fairbury Wastewater Treatment Facility | Fairbury | 0.36 | NE0024384 | Mar 2031 | 1 |
| 25 | Auburn Wastewater Treatment Facility | Auburn | 0.29 | NE0027774 | Sep 2028 | 9 |
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
Activated sludge and clarifiers in other states
Activated sludge and clarifiers 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.