Clean Water Act discharge permit · NPDES IA0035297
ACKLEY CITY OF STP, Ackley, IA: NPDES IA0035297 discharge permit, effluent exceedances, inspections, penalties
- EffectivePermit status
- MinorDischarger class
- 10Pollutants under a numeric limit
- 8Pollutants with an effluent exceedance
ACKLEY CITY OF STP, held by CITY OF ACKLEY, holds NPDES permit IA0035297. EPA’s file records it issued July 1, 2020 and expiring June 30, 2025. The status and dates are as EPA’s permit file stood when Velarion loaded it (September 14, 2026); EPA’s free Detailed Facility Report on ECHO carries the permit’s current standing.
Identity
| Facility as filed | ACKLEY CITY OF STP |
|---|---|
| Permittee as filed | CITY OF ACKLEY |
| NPDES ID | IA0035297 |
| Permit status | Effective |
| Permit type | Individual permit |
| Discharger class | Minor discharger |
| Facility type | Publicly owned treatment works |
| Program | Publicly owned treatment works |
| Issued | July 1, 2020 |
| Expiration date | June 30, 2025 |
| Issuing agency | STA |
| Address | Ackley, IA 50601 |
| Subwatershed | Middle Fork South Beaver Creek (HUC 070802050101) |
Cited to the EPA ICIS-NPDES permit file (ECHO download).
Effluent limits and exceedances
- 11Pollutants on file
- 10Under a numeric limit
- 9With a violation of any kind
- 8With 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] | 96 | 74 | 74 | January 31, 2026 | 874% over the limit |
| BOD, carbonaceous [5 day, 20 C] | 4 | 49 | 43 | October 31, 2024 | 143% over the limit |
| pH | 5 | 28 | 25 | June 30, 2024 | |
| Oxygen, dissolved [DO] | 1 | 29 | 24 | October 31, 2023 | 89% over the limit |
| Solids, total suspended | 9 | 16 | 10 | July 31, 2024 | 28% over the limit |
| E. coli | 1 | 8 | 7 | September 30, 2024 | 1,335% over the limit |
| Nitrogen, total [as N] | 2 | 12 | 5 | May 31, 2024 | 2,986% over the limit |
| Oil & Grease | 0 | 2 | 2 | November 30, 2025 | 110% over the limit |
| Phosphorus, total [as P] | 2 | 3 | 0 | ||
| BOD, 5-day, 20 deg. C | 5 | 0 | 0 | ||
| Sediment, suspended | 1 | 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 IA0035297.
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
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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 IA0035297 there.
Nearby on the register
Figures from EPA’s ICIS-NPDES download, loaded September 14, 2026.