Colo City Of STP
0.5 Mile South Of Ray Street & 6th Street, Colo, IA 50056 · Story County · Publicly Owned Treatment Works
- Average flow
- —
- Design flow
- 1 MGD
- NPDES permit
- IA0047759
- Administratively continued
- Permit expires
- March 2022
- Population served
- 845
- CWNS 2022
Colo City Of STP is a publicly owned wastewater treatment works in Colo, Story County, Iowa, serving about 845 residents. It discharges under NPDES permit IA0047759 (administratively continued), which expires in March 2022, with 34 recorded violations in the last three years.
Treatment technology
One treatment structure or unit process identified at Colo City Of STP.
Available with a free Klarifi account
See the full treatment train at Colo City Of STP: structures, unit processes and planned upgrades, with exact unit counts.
Compliance snapshot (last 3 years)
- Total violations
- 34
- 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 Colo City Of STP.
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Nearby wastewater treatment plants in Iowa
Collins · 7 mi away
—
Nevada · 8 mi away
1.37 MGD
State Center · 8 mi away
0.23 MGD
Rhodes · 9 mi away
—
Maxwell · 9 mi away
0.12 MGD
Saint Anthony · 10 mi away
—
Zearing · 11 mi away
0.09 MGD
Melbourne · 11 mi away
0.1 MGD
Colo City Of STP: 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 October 26, 2026; facility record last updated September 27, 2026.
Wastewater terms: POTW · MGD · NPDES permit · Inflow and infiltration · Lift station · Sludge dewatering · all terms