Activated sludge and clarifiers: wastewater treatment plants in Nebraska
46 plants · 23% of the state · 67 MGD combined
Klarifi identifies 46 publicly owned wastewater treatment plants with activated sludge and clarifiers in Nebraska, 23% of the 198 plants in the state (67 MGD combined). The largest is Missouri River Wastewater Treatment Plant in Omaha at 21.78 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 | 21.78 | NEL036358 | Dec 2030 | 0 |
| 2 | Grand Island Wastewater Trtmnt | Grand Island | 10.49 | NE0043702 | Dec 2024 | 11 |
| 3 | Fremont Wastewater Treatment | Fremont | 5.32 | NE0031381 | Sep 2029 | 0 |
| 4 | Lincoln Northeast Wastewater Treatment Facility | Lincoln | 4.14 | NE0112488 | Dec 2030 | 0 |
| 5 | Kearney Wastewater Treatment | Kearney | 3.57 | NE0052647 | Jun 2028 | 4 |
| 6 | Hastings Pollution Control Ctr | Hastings | 3.25 | NEL038946 | Dec 2030 | 0 |
| 7 | City Of Columbus - Wastewater Treatment Facility | Columbus | 3.02 | NE0035025 | Jun 2030 | 4 |
| 8 | City Of Norfolk Waste Facility | Norfolk | 2.91 | NEL033421 | Dec 2030 | 4 |
| 9 | Beatrice Wastewater Treatment | Beatrice | 1.13 | NE0020915 | Jun 2028 | 9 |
| 10 | Blair Wastewater Treatment | Blair | 0.98 | NE0021482 | Dec 2029 | 0 |
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 October 26, 2026.
Wastewater terms: Activated sludge · Biological nutrient removal · Equalization tank · Anaerobic digester · NPDES permit · all terms