Aspen Consolidated Sanitation District
Aspen, CO · Pitkin County · Publicly Owned Treatment Works
- Average flow
- 1.4 MGD
- Design flow
- 3 MGD
- NPDES permit
- CO0026387
- Effective
- Permit expires
- April 2031
- Population served
- 6,995
- CWNS 2022
Aspen Consolidated Sanitation District is a publicly owned wastewater treatment plant in Aspen, Pitkin County, Colorado treating an average of 1.4 million gallons per day against a permitted design capacity of 3 MGD, serving about 6,995 residents. Treatment on site includes aerated lagoons. It discharges under NPDES permit CO0026387 (effective), which expires in April 2031, with 10 recorded violations in the last three years.
Treatment technology
Treatment structures identified at this facility. Exact unit counts are available in Klarifi.
Aerated lagoons
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Compliance snapshot (last 3 years)
- Total violations
- 10
- Effluent violations
- 0
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Key contacts
Decision-makers at Aspen Consolidated Sanitation District.
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Redstone · 20 mi away
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Mount Crested Butte · 24 mi away
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Glenwood Springs · 26 mi away
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Carbondale · 27 mi away
0.09 MGD
Leadville · 28 mi away
0.37 MGD
Gypsum · 30 mi away
0.7 MGD
Red Cliff · 32 mi away
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Aspen Consolidated Sanitation District: frequently asked 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; facility record last updated March 7, 2025.