Garwin City Of STP
205 Main Street, Garwin, IA 50632 · Tama County · Publicly Owned Treatment Works
- Average flow
- —
- Design flow
- —
- NPDES permit
- IA0025925
- Administratively continued
- Permit expires
- June 2020
- Population served
- 481
- CWNS 2022
Garwin City Of STP is a publicly owned wastewater treatment works in Garwin, Tama County, Iowa, serving about 481 residents. It discharges under NPDES permit IA0025925 (administratively continued), which expires in June 2020, with 1 recorded violation in the last three years.
Treatment technology
One treatment structure or unit process identified at Garwin City Of STP.
Available with a free Klarifi account
See the full treatment train at Garwin City Of STP: structures, unit processes and planned upgrades, with exact unit counts.
Compliance snapshot (last 3 years)
- Total violations
- 1
- Effluent violations
- 1
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Key contacts
2 verified contacts for Garwin City Of STP, with validated emails and direct phone numbers.
Unlock 2 verified contacts
Names, validated emails and direct phone numbers for decision-makers at Garwin City Of STP, plus the full compliance history and discharge data.
Nearby wastewater treatment plants in Iowa
Garwin · 1 mi away
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Tama · 7 mi away
0.21 MGD
Le Grand · 7 mi away
0.08 MGD
Montour · 7 mi away
0.03 MGD
Gladbrook · 7 mi away
0.13 MGD
Toledo · 8 mi away
0.43 MGD
Tama · 11 mi away
0.39 MGD
Marshalltown · 11 mi away
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Garwin 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 January 31, 2025.
Wastewater terms: POTW · MGD · NPDES permit · Inflow and infiltration · Oxidation ditch · Anaerobic digester · all terms