Clean Water Act discharge permit · NPDES IA0035963
LA PORTE CITY, CITY OF STP, La Porte City, IA: NPDES IA0035963 discharge permit, effluent exceedances, inspections, penalties
- EffectivePermit status
- MinorDischarger class
- 9Pollutants under a numeric limit
- 5Pollutants with an effluent exceedance
- 0Inspections on file
- 0Formal enforcement actions
LA PORTE CITY, CITY OF STP, held by CITY OF LAPORTE CITY, holds NPDES permit IA0035963. EPA’s file records it issued February 1, 2017 and expiring January 31, 2022.
LA PORTE CITY, CITY OF STP, La Porte City, Iowa: Individual permit IA0035963, held by CITY OF LAPORTE CITY; Publicly owned treatment works; Effective; issued February 1, 2017, term to January 31, 2022, by STA; Sewage Treatment Facilities.
- pH: 5 limits, 26 violations of any kind, 20 effluent exceedances, latest June 30, 2024.
- Solids, total suspended: 9 limits, 24 violations of any kind, 18 effluent exceedances, latest December 31, 2022, largest 1,500% over the limit.
- Nitrogen, ammonia total [as N]: 48 limits, 22 violations of any kind, 18 effluent exceedances, latest March 31, 2025, largest 146% over the limit.
- E. coli: 0 limits, 9 violations of any kind, 8 effluent exceedances, latest September 30, 2024, largest 46,261% over the limit.
- Oxygen, dissolved [DO]: 1 limit, 3 violations of any kind, 2 effluent exceedances, latest September 30, 2021, largest 74% over the limit.
- BOD, carbonaceous [5 day, 20 C]: 4 limits, 16 violations of any kind, 0 effluent exceedances.
- Nitrogen, total [as N]: 2 limits, 2 violations of any kind, 0 effluent exceedances.
- BOD, 5-day, 20 deg. C: 5 limits, 0 violations of any kind, 0 effluent exceedances.
- Nitrogen, Kjeldahl, total [as N]: 5 limits, 0 violations of any kind, 0 effluent exceedances.
- Phosphorus, total [as P]: 5 limits, 0 violations of any kind, 0 effluent exceedances.
Iowa holds 734 Publicly owned treatment works coverages of this permit type in EPA’s file; 181 were issued before IA0035963.
Coverages issued nearest IA0035963
- February 1, 2017: CORWITH CITY OF STP, Corwith, IA0021351, held by CITY OF CORWITH
- February 1, 2017: MAURICE CITY OF STP, Maurice, IA0023451, held by CITY OF MAURICE
- February 1, 2017: ELGIN CITY OF STP, Elgin, IA0024414, held by CITY OF ELGIN
- February 1, 2017: EXIRA CITY OF STP, Exira, IA0027987, held by CITY OF EXIRA
- February 1, 2017: VINCENT CITY OF STP, Vincent, IA0032930, held by CITY OF VINCENT
- February 1, 2017: GRAND JUNCTION CITY OF STP, Grand Junction, IA0041891, held by CITY OF GRAND JUNCTION
- February 1, 2017: UTE CITY OF STP, Ute, IA0043010, held by CITY OF UTE
- February 1, 2017: FONDA CITY OF STP, Fonda, IA0046671, held by CITY OF FONDA
- February 1, 2017: WAYLAND, CITY OF STP, Wayland, IA0047953, held by CITY OF WAYLAND
- February 1, 2017: CALLENDER CITY OF STP, Callender, IA0057096, held by CITY OF CALLENDER
LA PORTE CITY, CITY OF STP among its neighbors
EPA’s permit file holds 2 discharge permits in the Wolf Creek subwatershed (HUC 070802050809), IA0035963 among them. Its county holds 34, 3 of them major permits; IA0035963 is a minor permit.
Other permits in the Wolf Creek subwatershed (HUC 070802050809)
- HICKORY HILLS PARK, La Porte City: IA0066940, minor permit, permit term to December 31, 2020
Identity
| Facility as filed | LA PORTE CITY, CITY OF STP |
|---|---|
| Permittee as filed | CITY OF LAPORTE CITY |
| NPDES ID | IA0035963 |
| Permit status | Effective |
| Permit type | Individual permit |
| Discharger class | Minor discharger |
| Facility type | Publicly owned treatment works |
| Program | Publicly owned treatment works |
| Issued | February 1, 2017 |
| Expiration date | January 31, 2022 |
| Issuing agency | STA |
| Address | La Porte City, IA 50651 |
| Receiving water impaired | 303(D) Listed |
| Subwatershed | Wolf Creek (HUC 070802050809) |
| NAICS | 221320 – Sewage Treatment Facilities |
| SIC | 4952 – Sewerage Systems |
Effluent limits and exceedances
- 10Pollutants on file
- 9Under a numeric limit
- 7With a violation of any kind
- 5With 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 |
|---|---|---|---|---|---|
| pH | 5 | 26 | 20 | June 30, 2024 | |
| Solids, total suspended | 9 | 24 | 18 | December 31, 2022 | 1,500% over the limit |
| Nitrogen, ammonia total [as N] | 48 | 22 | 18 | March 31, 2025 | 146% over the limit |
| E. coli | 0 | 9 | 8 | September 30, 2024 | 46,261% over the limit |
| Oxygen, dissolved [DO] | 1 | 3 | 2 | September 30, 2021 | 74% over the limit |
| BOD, carbonaceous [5 day, 20 C] | 4 | 16 | 0 | ||
| Nitrogen, total [as N] | 2 | 2 | 0 | ||
| BOD, 5-day, 20 deg. C | 5 | 0 | 0 | ||
| Nitrogen, Kjeldahl, total [as N] | 5 | 0 | 0 | ||
| Phosphorus, total [as P] | 5 | 0 | 0 |
Inspections, violations and enforcement
- 0Single-event violations
EPA’s single-event violation file, as loaded, holds no violation for NPDES IA0035963.
Inspections
EPA’s inspection file holds no inspection for NPDES IA0035963.
Formal enforcement and penalties
0 formal actions, 0 of them with a penalty assessed. Federal and state penalties are separate figures from separate authorities and are shown as each was filed, never added together.
Informal enforcement
EPA’s informal enforcement file holds no action for NPDES IA0035963.
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Figures from EPA’s ICIS-NPDES download, loaded October 14, 2026.