Oelwein WWTP
500 9th Ave SW, Oelwein, IA 50662 · Fayette County · Publicly Owned Treatment Works
- Average flow
- 1.4 MGD
- Design flow
- 6.2 MGD
- NPDES permit
- IA0032344
- Administratively continued
- Permit expires
- May 2026
- Population served
- 7,037
- CWNS 2022
Oelwein WWTP is a publicly owned wastewater treatment works in Oelwein, Fayette County, Iowa treating an average of 1.4 million gallons per day against a permitted design capacity of 6.2 MGD, serving about 7,037 residents. It discharges under NPDES permit IA0032344 (administratively continued), which expires in May 2026, with 16 recorded violations in the last three years.
Treatment technology
One treatment structure or unit process identified at Oelwein WWTP.
Available with a free Klarifi account
See the full treatment train at Oelwein WWTP: structures, unit processes and planned upgrades, with exact unit counts.
Compliance snapshot (last 3 years)
- Total violations
- 16
- Effluent violations
- 16
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Industrial users and pretreatment
Industries that discharge process wastewater to Oelwein WWTP, from the plant's pretreatment programme records.
- Industrial users
- 1
- on record
On record: Dcw Casing LLC (Oelwein). Most users are in chemicals, plastics and petroleum.
Unlock the details behind these industrial users
Discharge flow, federal category, source documents and contacts for every industrial user of Oelwein WWTP. Free with a Klarifi account.
Capital improvement projects in Oelwein
Oelwein's capital improvement plan lists 19 water, sewer and wastewater line items worth $9M starting 2026–2029. The largest budgeted items are shown here.
All water and sewer capital projects in Oelwein →
| Project | Budget | Years |
|---|---|---|
| Sewer Line Replacement | $4,500,000 | 2027–2030 |
| Water Main Replacement | $3,405,000 | 2026–2029 |
| TV Sanitary Sewers | $280,000 | 2026–2027 |
| Sewer Cleaning and Inspection | $250,000 | 2026–2030 |
| East Tower Paint | $250,000 | 2029–2029 |
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
1 verified contact for Oelwein WWTP, with validated emails and direct phone numbers.
Unlock 1 verified contact
Names, validated emails and direct phone numbers for decision-makers at Oelwein WWTP, plus the full compliance history and discharge data.
Nearby wastewater treatment plants in Iowa
Hazleton · 4 mi away
0.13 MGD
Stanley · 6 mi away
—
Fairbank · 7 mi away
0.15 MGD
Westgate · 8 mi away
—
Oran · 8 mi away
—
Maynard · 9 mi away
—
Aurora · 11 mi away
—
Dunkerton · 14 mi away
0.16 MGD
Oelwein WWTP: 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 April 23, 2025.
Wastewater terms: POTW · MGD · NPDES permit · Inflow and infiltration · Tertiary treatment · Significant industrial user · all terms