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Clean Water Act discharge permit · NPDES IA0030945

CLARION, CITY OF STP, Clarion, IA: NPDES IA0030945 discharge permit, effluent exceedances, inspections, penalties

CLARION, CITY OF STP, held by CITY OF CLARION, holds NPDES permit IA0030945. EPA’s file records it issued December 1, 2012 and expiring November 30, 2017.

CLARION, CITY OF STP, Clarion, Iowa: Individual permit IA0030945, held by CITY OF CLARION; Publicly owned treatment works; Administratively continued (past its expiration date and still in force until reissued); issued December 1, 2012, term to November 30, 2017, by STA.

  • Nitrogen, ammonia total [as N]: 96 limits, 34 violations of any kind, 25 effluent exceedances, latest July 31, 2025, largest 413% over the limit.
  • Flow, in conduit or thru treatment plant: 0 limits, 22 violations of any kind, 20 effluent exceedances, latest May 31, 2012, largest 154% over the limit.
  • BOD, carbonaceous [5 day, 20 C]: 4 limits, 14 violations of any kind, 6 effluent exceedances, latest February 28, 2011, largest 413% over the limit.
  • pH: 5 limits, 5 violations of any kind, 3 effluent exceedances, latest September 30, 2021.
  • Solids, total suspended: 9 limits, 10 violations of any kind, 1 effluent exceedance, latest April 30, 2005, largest 6% over the limit.
  • Nitrogen, Kjeldahl, total [as N]: 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, 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.
  • Oxygen, dissolved [DO]: 3 limits, 0 violations of any kind, 0 effluent exceedances.
  • Nitrogen, nitrate total [as N]: 2 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; 75 were issued before IA0030945.

Coverages issued nearest IA0030945

CLARION, CITY OF STP among its neighbors

EPA’s permit file holds 2 discharge permits in the Eagle Creek subwatershed (HUC 071000050403), IA0030945 among them. Its county holds 9, 2 of them major permits; IA0030945 is a major permit.

Other permits in the Eagle Creek subwatershed (HUC 071000050403)

Identity

Facility as filedCLARION, CITY OF STP
Permittee as filedCITY OF CLARION
NPDES IDIA0030945
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
IssuedDecember 1, 2012
Expiration dateNovember 30, 2017
Issuing agencySTA
AddressClarion, IA 50525
SubwatershedEagle Creek (HUC 071000050403)

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]963425July 31, 2025413% over the limit
Flow, in conduit or thru treatment plant02220May 31, 2012154% over the limit
BOD, carbonaceous [5 day, 20 C]4146February 28, 2011413% over the limit
pH553September 30, 2021
Solids, total suspended9101April 30, 20056% over the limit
Nitrogen, Kjeldahl, total [as N]1000
BOD, 5-day, 20 deg. C500
Nitrogen, total [as N]500
Phosphorus, total [as P]500
Oxygen, dissolved [DO]300
Nitrogen, nitrate total [as N]200

Inspections, violations and enforcement

EPA’s single-event violation file, as loaded, holds no violation for NPDES IA0030945.

Inspections

EPA’s inspection file holds no inspection for NPDES IA0030945.

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 IA0030945.

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Nearby on the register

Figures from EPA’s ICIS-NPDES download, loaded September 15, 2026.

What this page shows

This public-records page covers the Clean Water Act NPDES discharge permit IA0030945 held by CITY OF CLARION for the facility CLARION, CITY OF STP in Clarion, IA, a Major Discharger class publicly owned treatment works that is administratively continued. The page lists 11 pollutants on file, 10 under a numeric limit, and 5 with an effluent exceedance, and it sits in the Eagle Creek subwatershed (HUC 071000050403).