Fairfield City Of STP
Fairfield, IA · Jefferson County · Publicly Owned Treatment Works
- Average flow
- —
- Design flow
- 16.1 MGD
- NPDES permit
- IA0035076
- Effective
- Permit expires
- May 2026
- Population served
- 10,210
- CWNS 2022
Fairfield City Of STP is a publicly owned wastewater treatment works in Fairfield, Jefferson County, Iowa, serving about 10,210 residents. Treatment on site includes uncovered lagoons, biogas silos, biogas balloons. It discharges under NPDES permit IA0035076 (effective), which expires in May 2026, with 28 recorded violations in the last three years.
Treatment technology
Treatment structures identified at this facility. Exact unit counts are available in Klarifi.
Compliance snapshot (last 3 years)
- Total violations
- 28
- Effluent violations
- 24
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Capital improvement projects in Fairfield
Fairfield's capital improvement plan lists 22 water, sewer and wastewater line items worth $17M starting 2025–2029. The largest budgeted items are shown here.
All water and sewer capital projects in Fairfield →
| Project | Budget | Years |
|---|---|---|
| STEP 4b | $6,400,000 | 2025–2027 |
| EDR Replacement | $4,000,000 | 2025–2026 |
| EDR Loan Payment | $1,300,000 | 2025–2030 |
| Collection system repairs/lining/rehabilitation | $1,260,000 | 2025–2030 |
| STEP 4a | $700,000 | 2025–2026 |
Full project details — scope, funding source, engineering consultant and the decision-makers behind each project — are available in Klarifi, along with similar wastewater capital projects in other cities.
Key contacts
3 verified contacts for Fairfield City Of STP, with validated emails and direct phone numbers.
Unlock 3 verified contacts
Names, validated emails and direct phone numbers for decision-makers at Fairfield City Of STP, plus the full compliance history and discharge data.
Nearby wastewater treatment plants in Iowa
Fairfield · 5 mi away
0.0079 MGD
Libertyville · 5 mi away
—
Birmingham · 7 mi away
0.04 MGD
Stockport · 10 mi away
—
Lockridge · 11 mi away
—
Batavia · 11 mi away
—
Packwood · 13 mi away
—
Brighton · 13 mi away
—
Fairfield 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 September 11, 2026; facility record last updated March 28, 2025.