Lone Rock, City Of STP
320th Street (1/3 Mile East Of 70th Ave.), Lone Rock, IA 50559 · Kossuth County · Publicly Owned Treatment Works
- Average flow
- —
- Design flow
- 0.03 MGD
- NPDES permit
- IA0082341
- Effective
- Permit expires
- December 2030
- Population served
- —
- CWNS 2022
Lone Rock, City Of STP is a publicly owned wastewater treatment works in Lone Rock, Kossuth County, Iowa. It discharges under NPDES permit IA0082341 (effective), which expires in December 2030, with 3 recorded violations in the last three years.
Treatment technology
One treatment structure or unit process identified at Lone Rock, City Of STP.
Available with a free Klarifi account
See the full treatment train at Lone Rock, City Of STP: structures, unit processes and planned upgrades, with exact unit counts.
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 Lone Rock, City Of STP, with validated emails and direct phone numbers.
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Names, validated emails and direct phone numbers for decision-makers at Lone Rock, City Of STP, plus the full compliance history and discharge data.
Nearby wastewater treatment plants in Iowa
Burt · 6 mi away
—
Fenton · 6 mi away
—
Bancroft · 8 mi away
—
Swea City · 10 mi away
—
Algona · 12 mi away
0.72 MGD
Armstrong · 14 mi away
0.1 MGD
Titonka · 14 mi away
—
Cylinder · 15 mi away
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Lone Rock, 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 August 4, 2026.
Wastewater terms: POTW · MGD · NPDES permit · Inflow and infiltration · Filter press · FOG · all terms