Clean Water Act discharge permit · NPDES IA0022055
ALGONA CITY OF STP, Algona, IA: NPDES IA0022055 discharge permit, effluent exceedances, inspections, penalties
- EffectivePermit status
- MajorDischarger class
- 15Pollutants under a numeric limit
- 8Pollutants with an effluent exceedance
ALGONA CITY OF STP, held by CITY OF ALGONA, holds NPDES permit IA0022055. EPA’s file records it issued March 1, 2023 and expiring February 29, 2028. 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 | ALGONA CITY OF STP |
|---|---|
| Permittee as filed | CITY OF ALGONA |
| NPDES ID | IA0022055 |
| Permit status | Effective |
| Permit type | Individual permit |
| Discharger class | Major discharger |
| Facility type | Publicly owned treatment works |
| Program | Publicly owned treatment works |
| Issued | March 1, 2023 |
| Expiration date | February 29, 2028 |
| Issuing agency | STA |
| Address | Algona, IA 50511 |
| Subwatershed | Drainage Ditch 51-East Fork Des Moines River (HUC 071000030802) |
Cited to the EPA ICIS-NPDES permit file (ECHO download).
Effluent limits and exceedances
- 17Pollutants on file
- 15Under a numeric limit
- 11With 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 |
|---|---|---|---|---|---|
| Copper, total [as Cu] | 4 | 58 | 48 | February 28, 2026 | 119% over the limit |
| Solids, total suspended | 9 | 34 | 19 | June 30, 2025 | 197% over the limit |
| BOD, carbonaceous [5 day, 20 C] | 4 | 17 | 7 | March 31, 2010 | 80% over the limit |
| Silver, total [as Ag] | 0 | 9 | 5 | August 31, 2018 | 14% over the limit |
| Nitrogen, ammonia total [as N] | 48 | 6 | 2 | April 30, 2013 | 27% over the limit |
| Oxygen, dissolved [DO] | 1 | 2 | 2 | July 31, 2024 | 24% over the limit |
| pH | 5 | 6 | 1 | February 28, 2026 | |
| Toxicity [acute], Ceriodaphnia dubia | 1 | 2 | 1 | February 28, 2007 | 100% over the limit |
| Zinc, total [as Zn] | 0 | 6 | 0 | ||
| Nitrogen, nitrate total [as N] | 2 | 5 | 0 | ||
| Toxicity [acute], Pimephales promelas [Fathead Minnow] | 1 | 1 | 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 | ||
| Chloride [as Cl] | 5 | 0 | 0 | ||
| E. coli | 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 IA0022055.
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.
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Figures from EPA’s ICIS-NPDES download, loaded September 14, 2026.