Clean Water Act discharge permit · NPDES IA0032344
OELWEIN CITY OF STP, Oelwein, IA: NPDES IA0032344 discharge permit, effluent exceedances, inspections, penalties
- EffectivePermit status
- MajorDischarger class
- 12Pollutants under a numeric limit
- 4Pollutants with an effluent exceedance
OELWEIN CITY OF STP, held by CITY OF OELWEIN, holds NPDES permit IA0032344. EPA’s file records it issued June 1, 2021 and expiring May 31, 2026. The status and dates are as EPA’s permit file stood when Velarion loaded it (October 14, 2026); EPA’s free Detailed Facility Report on ECHO carries the permit’s current standing.
Identity
| Facility as filed | OELWEIN CITY OF STP |
|---|---|
| Permittee as filed | CITY OF OELWEIN |
| NPDES ID | IA0032344 |
| Permit status | Effective |
| Permit type | Individual permit |
| Discharger class | Major discharger |
| Facility type | Publicly owned treatment works |
| Program | Publicly owned treatment works |
| Issued | June 1, 2021 |
| Expiration date | May 31, 2026 |
| Issuing agency | STA |
| Address | Oelwein, IA 50662 |
| Subwatershed | Hazleton Creek-Otter Creek (HUC 070801020702) |
| Program components on file | Biosolids, POTW |
| NAICS | 221320 – Sewage Treatment Facilities |
| SIC | 4952 – Sewerage Systems |
Cited to the EPA ICIS-NPDES permit file (ECHO download) and EPA’s NAICS/SIC and component files, the same download.
Effluent limits and exceedances
- 13Pollutants on file
- 12Under a numeric limit
- 8With a violation of any kind
- 4With an effluent exceedance
An effluent exceedance is a discharge monitoring report value over the permit’s numeric limit (EPA’s violation code E90). A violation of any kind also counts a report not filed. Each row is EPA’s own count for that pollutant.
| Pollutant or measure | Limits | Violations, any kind | Effluent exceedances | Latest exceedance | Largest exceedance, as filed |
|---|---|---|---|---|---|
| Nitrogen, ammonia total [as N] | 48 | 24 | 16 | June 30, 2026 | 286% over the limit |
| Solids, total suspended | 9 | 25 | 9 | January 31, 2022 | 477% over the limit |
| Oxygen, dissolved [DO] | 1 | 12 | 5 | March 31, 2022 | 29% over the limit |
| E. coli | 0 | 3 | 2 | September 30, 2024 | 122% over the limit |
| BOD, carbonaceous [5 day, 20 C] | 4 | 16 | 0 | ||
| pH | 5 | 11 | 0 | ||
| Toxicity [acute], Ceriodaphnia dubia | 1 | 3 | 0 | ||
| Toxicity [acute], Pimephales promelas [Fathead Minnow] | 1 | 3 | 0 | ||
| Nitrogen, total [as N] | 10 | 0 | 0 | ||
| Phosphorus, total [as P] | 10 | 0 | 0 | ||
| BOD, 5-day, 20 deg. C | 5 | 0 | 0 | ||
| Nitrogen, Kjeldahl, total [as N] | 5 | 0 | 0 | ||
| Cyanide, total [as CN] | 5 | 0 | 0 |
Cited to the EPA ICIS-NPDES limits and effluent violations files (ECHO download); up to 60 rows shown, most exceedances first.
Inspections, violations and enforcement
- 0Single-event violations
EPA’s single-event violation file, as loaded, holds no violation for NPDES IA0032344.
Velarion’s copy of EPA’s ICIS-NPDES files does not include the inspections, formal enforcement actions and informal enforcement actions files, so this page shows none of them. EPA’s free Detailed Facility Report on ECHO lists this permit’s inspections, enforcement actions and penalties.
Cited to the EPA ICIS-NPDES violation, inspection and enforcement files (ECHO download); up to 50 rows of each shown, newest first.
Watch this permit
One permit holder, $99/month. Watch the register for one permit holder and the places and receiving waters tied to its permits. Choose “One permit holder” and enter this permit’s NPDES ID, IA0032344.
Start the watch
- One permit holder — $99/month
- One watershed — $2,990/year
- One state — $4,990/year
- The whole register — $18,000/year
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EPA publishes a free Detailed Facility Report for every permit on ECHO: its compliance status quarter by quarter, its inspections, and its enforcement actions and penalties. EPA also sends free notices of new inspections and enforcement actions through ECHO Notify; enter NPDES ID IA0032344 there.
Nearby on the register
Figures from EPA’s ICIS-NPDES download, loaded October 14, 2026.