Activated sludge and clarifiers: wastewater treatment plants in Utah
11 plants · 42% of the state · 43 MGD reported by 4 plants
Klarifi identifies 11 publicly owned wastewater treatment plants with activated sludge and clarifiers in Utah, 42% of the 26 plants in the state (43 MGD reported by 4 plants). The largest is Salt Lake City Water Reclamation Plant in Salt Lake City at 31.1 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 Utah
| # | Facility | City | Avg flow (MGD) | NPDES permit | Expires | Violations (3y) |
|---|---|---|---|---|---|---|
| 1 | Salt Lake City Water Reclamation Plant | Salt Lake City | 31.1 | UT0021725 | Dec 2029 | 1 |
| 2 | Spanish Fork City Corporation | Spanish Fork | 5.4 | UT0020109 | Jan 2027 | 101 |
| 3 | Cedar City Regional Wastewater Treatment Facility | Cedar City | 4.29 | UT0024970 | Jun 2028 | 0 |
| 4 | Snyderville Basin Water Reclamation District | Park City | 1.8 | UT0020001 | Apr 2031 | 0 |
| 5 | Brigham City Corporation Waste Water | Brigham City | — | UT0022365 | Apr 2030 | 1 |
| 6 | Central Weber Sewer Improvement District | Ogden | — | UT0021911 | Jul 2030 | 4 |
| 7 | Magna Water District WWTP | Magna | — | UT0021440 | Mar 2029 | 0 |
| 8 | Orem City Corporation | Orem | — | UT0020915 | Mar 2031 | 2 |
| 9 | Salem City Water Reclamation Facility | Salem | — | UT0026085 | Mar 2029 | 2 |
| 10 | South Davis Sewer Improvement District South Plant | North Salt Lake | — | UT0021628 | Dec 2026 | 1 |
| 11 | Timpanogos Special Serv. Dist. | American Fork | — | UT0023639 | Dec 2030 | 1 |
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 Utah
Activated sludge and clarifiers in other states
Activated sludge and clarifiers in Utah: 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.