Durand Sd STP
Fourth And Market Street, Durand, IL 61024 · Winnebago County · Publicly Owned Treatment Works
- Average flow
- 0.1 MGD
- Design flow
- 0.45 MGD
- NPDES permit
- ILG582019
- Effective
- Permit expires
- May 2027
- Population served
- 1,398
- CWNS 2022
Durand Sd STP is a publicly owned wastewater treatment works in Durand, Winnebago County, Illinois treating an average of 0.1 million gallons per day against a permitted design capacity of 0.45 MGD, serving about 1,398 residents. It discharges under NPDES permit ILG582019 (effective), which expires in May 2027, with 8 recorded violations in the last three years.
Treatment technology
3 treatment structures and unit processes identified at Durand Sd STP.
Available with a free Klarifi account
See the full treatment train at Durand Sd STP: structures, unit processes and planned upgrades, with exact unit counts.
Compliance snapshot (last 3 years)
- Total violations
- 8
- Effluent violations
- 8
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Key contacts
Decision-makers at Durand Sd STP.
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Nearby wastewater treatment plants in Illinois
Davis · 6 mi away
0.08 MGD
Rock City · 8 mi away
0.02 MGD
Pecatonica · 9 mi away
0.18 MGD
Dakota · 11 mi away
0.05 MGD
Rockton · 12 mi away
0.35 MGD
Seward · 14 mi away
0.02 MGD
Cedarville · 17 mi away
0.09 MGD
Orangeville · 17 mi away
0.11 MGD
Durand Sd 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 5, 2026.
Wastewater terms: POTW · MGD · NPDES permit · Inflow and infiltration · FOG · Equalization tank · all terms