Marble Rock WWTP
Marble Rock, IA · Floyd County · Publicly Owned Treatment Works
- Average flow
- —
- Design flow
- 0.09 MGD
- NPDES permit
- IA0057207
- Effective
- Permit expires
- January 2031
- Population served
- 250
- CWNS 2022
Marble Rock WWTP is a publicly owned wastewater treatment works in Marble Rock, Floyd County, Iowa, serving about 250 residents. Treatment on site includes uncovered lagoons. It discharges under NPDES permit IA0057207 (effective), which expires in January 2031, with 0 recorded violations in the last three years.
Treatment technology
Treatment structures identified at this facility. Exact unit counts are available in Klarifi.
Uncovered lagoons
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Compliance snapshot (last 3 years)
- Total violations
- 0
- Effluent violations
- 0
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Key contacts
1 verified contact for Marble Rock WWTP, with validated emails and direct phone numbers.
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Names, validated emails and direct phone numbers for decision-makers at Marble Rock WWTP, plus the full compliance history and discharge data.
Nearby wastewater treatment plants in Iowa
Greene · 6 mi away
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Rockford · 7 mi away
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Dougherty · 8 mi away
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Rudd · 12 mi away
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Floyd · 14 mi away
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Nora Springs · 14 mi away
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Allison · 16 mi away
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Dumont · 16 mi away
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Marble Rock 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 September 11, 2026; facility record last updated November 26, 2025.