Evansdale City Of STP
1212 River Forrest Road, Evansdale, IA 50707 · Black Hawk County · Publicly Owned Treatment Works
- Average flow
- —
- Design flow
- 1.28 MGD
- NPDES permit
- IA0034231
- Effective
- Permit expires
- October 2028
- Population served
- 1,828
- CWNS 2022
Evansdale City Of STP is a publicly owned wastewater treatment works in Evansdale, Black Hawk County, Iowa, serving about 1,828 residents. It discharges under NPDES permit IA0034231 (effective), which expires in October 2028, with 14 recorded violations in the last three years.
Treatment technology
2 treatment structures and unit processes identified at Evansdale City Of STP.
Available with a free Klarifi account
See the full treatment train at Evansdale City Of STP: structures, unit processes and planned upgrades, with exact unit counts.
Compliance snapshot (last 3 years)
- Total violations
- 14
- Effluent violations
- 14
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Key contacts
2 verified contacts for Evansdale 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 Evansdale City Of STP, plus the full compliance history and discharge data.
Nearby wastewater treatment plants in Iowa
Dewar · 6 mi away
—
Gilbertville · 6 mi away
0.11 MGD
Hudson · 8 mi away
0.35 MGD
Cedar Falls · 8 mi away
4.83 MGD
Dunkerton · 11 mi away
0.16 MGD
La Porte City · 12 mi away
0.27 MGD
Jesup · 12 mi away
0.2 MGD
Denver · 14 mi away
0.28 MGD
Evansdale 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 March 28, 2025.
Wastewater terms: POTW · MGD · NPDES permit · Inflow and infiltration · Lift station · Sludge dewatering · all terms