Mcgregor WWTP
147 River Rd, Mcgregor, IA 52157 · Clayton County · Publicly Owned Treatment Works
- Average flow
- 0.04 MGD
- Design flow
- 0.4 MGD
- NPDES permit
- IA0028614
- Effective
- Permit expires
- March 2029
- Population served
- 910
- CWNS 2022
Mcgregor WWTP is a publicly owned wastewater treatment works in Mcgregor, Clayton County, Iowa treating an average of 0.04 million gallons per day against a permitted design capacity of 0.4 MGD, serving about 910 residents. It discharges under NPDES permit IA0028614 (effective), which expires in March 2029, with 3 recorded violations in the last three years.
Treatment technology
Treatment structures and unit processes at Mcgregor WWTP.
Treatment structure data not yet analyzed for this facility.
Compliance snapshot (last 3 years)
- Total violations
- 3
- Effluent violations
- 3
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Key contacts
1 verified contact for Mcgregor WWTP, with validated emails and direct phone numbers.
Unlock 1 verified contact
Names, validated emails and direct phone numbers for decision-makers at Mcgregor WWTP, plus the full compliance history and discharge data.
Nearby wastewater treatment plants in Iowa
Marquette · 2 mi away
0.03 MGD
Garnavillo · 12 mi away
0.06 MGD
Monona · 12 mi away
0.16 MGD
Saint Olaf · 13 mi away
0.0055 MGD
Harpers Ferry · 14 mi away
0.02 MGD
Luana · 15 mi away
—
Elkader · 17 mi away
0.1 MGD
Guttenberg · 17 mi away
0.26 MGD
Mcgregor WWTP: 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 November 5, 2025.
Wastewater terms: POTW · MGD · NPDES permit · Inflow and infiltration · Activated sludge · Oxidation ditch · all terms