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Clean Water Act discharge permit · NPDES IA0027740

CASCADE CITY OF STP, Cascade, IA: NPDES IA0027740 discharge permit, effluent exceedances, inspections, penalties

CASCADE CITY OF STP, held by CITY OF CASCADE, holds NPDES permit IA0027740. EPA’s file records it issued February 1, 2018 and expiring January 31, 2023.

CASCADE CITY OF STP, Cascade, Iowa: Individual permit IA0027740, held by CITY OF CASCADE; Publicly owned treatment works; Administratively continued (past its expiration date and still in force until reissued); issued February 1, 2018, term to January 31, 2023, by STA; Sewage Treatment Facilities.

  • Nitrogen, ammonia total [as N]: 48 limits, 30 violations of any kind, 30 effluent exceedances, latest December 31, 2017, largest 25,655% over the limit.
  • Solids, total suspended: 9 limits, 20 violations of any kind, 12 effluent exceedances, latest September 30, 2015, largest 16,192% over the limit.
  • BOD, carbonaceous [5 day, 20 C]: 4 limits, 16 violations of any kind, 6 effluent exceedances, latest September 30, 2015, largest 11,805% over the limit.
  • pH: 5 limits, 10 violations of any kind, 6 effluent exceedances, latest September 30, 2015.
  • E. coli: 0 limits, 4 violations of any kind, 1 effluent exceedance, latest August 31, 2017, largest 1,202% over the limit.
  • Toxicity [acute], Pimephales promelas [Fathead Minnow]: 1 limit, 3 violations of any kind, 1 effluent exceedance, latest April 30, 2022, largest 100% over the limit.
  • Toxicity [acute], Ceriodaphnia dubia: 1 limit, 2 violations of any kind, 1 effluent exceedance, latest April 30, 2022, largest 100% over the limit.
  • Nitrogen, total [as N]: 10 limits, 0 violations of any kind, 0 effluent exceedances.
  • Phosphorus, total [as P]: 10 limits, 0 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.

Iowa holds 734 Publicly owned treatment works coverages of this permit type in EPA’s file; 316 were issued before IA0027740.

Coverages issued nearest IA0027740

CASCADE CITY OF STP among its neighbors

EPA’s permit file holds 2 discharge permits in the Village of Cascade-North Fork Maquoketa River subwatershed (HUC 070600060606), IA0027740 among them. Its county holds 12, 3 of them major permits; IA0027740 is a major permit.

Other permits in the Village of Cascade-North Fork Maquoketa River subwatershed (HUC 070600060606)

Identity

Facility as filedCASCADE CITY OF STP
Permittee as filedCITY OF CASCADE
NPDES IDIA0027740
Permit statusAdministratively continued (past its expiration date and still in force until reissued)
Permit typeIndividual permit
Discharger classMajor discharger
Facility typePublicly owned treatment works
ProgramPublicly owned treatment works
IssuedFebruary 1, 2018
Expiration dateJanuary 31, 2023
Issuing agencySTA
AddressCascade, IA 52033
SubwatershedVillage of Cascade-North Fork Maquoketa River (HUC 070600060606)
NAICS221320 – Sewage Treatment Facilities
SIC4952 – Sewerage Systems

Effluent limits and exceedances

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 measureLimitsViolations, any kindEffluent exceedancesLatest exceedanceLargest exceedance, as filed
Nitrogen, ammonia total [as N]483030December 31, 201725,655% over the limit
Solids, total suspended92012September 30, 201516,192% over the limit
BOD, carbonaceous [5 day, 20 C]4166September 30, 201511,805% over the limit
pH5106September 30, 2015
E. coli041August 31, 20171,202% over the limit
Toxicity [acute], Pimephales promelas [Fathead Minnow]131April 30, 2022100% over the limit
Toxicity [acute], Ceriodaphnia dubia121April 30, 2022100% over the limit
Nitrogen, total [as N]1000
Phosphorus, total [as P]1000
BOD, 5-day, 20 deg. C500
Nitrogen, Kjeldahl, total [as N]500

Inspections, violations and enforcement

EPA’s single-event violation file, as loaded, holds no violation for NPDES IA0027740.

Inspections

EPA’s inspection file holds no inspection for NPDES IA0027740.

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 IA0027740.

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Nearby on the register

Figures from EPA’s ICIS-NPDES download, loaded October 14, 2026.

What this page shows

This public-records page covers NPDES permit IA0027740 for CASCADE CITY OF STP in Cascade, IA, held by CITY OF CASCADE, with its status and dates as EPA's permit file stood when Velarion loaded it on October 14, 2026. The page lists a permit status of Administratively continued, a Major Discharger class, 10 pollutants under a numeric limit, and 7 pollutants with an effluent exceedance.