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Clean Water Act discharge permit · NPDES IN0040436

NORTH SALEM WWTP, North Salem, IN: NPDES IN0040436 discharge permit, effluent exceedances, inspections, penalties

NORTH SALEM WWTP holds NPDES permit IN0040436, which discharges to Middle Fork Of Big Walnut Creek. EPA’s file records it issued October 2, 2018 and expiring January 31, 2024.

NORTH SALEM WWTP, North Salem, Indiana: Individual permit IN0040436; Publicly owned treatment works; Administratively continued (past its expiration date and still in force until reissued); issued October 2, 2018, term to January 31, 2024, by IDEM; discharges to MIDDLE FORK OF BIG WALNUT CREEK.

  • Solids, total suspended: 4 limits, 30 violations of any kind, 21 effluent exceedances, latest February 28, 2022, largest 811% over the limit.
  • Chlorine, total residual: 4 limits, 12 violations of any kind, 12 effluent exceedances, latest September 30, 2015, largest 900% over the limit.
  • Nitrogen, ammonia total [as N]: 8 limits, 18 violations of any kind, 2 effluent exceedances, latest May 31, 2009, largest 21% over the limit.
  • BOD, carbonaceous [5 day, 20 C]: 4 limits, 14 violations of any kind, 2 effluent exceedances, latest March 31, 2000, largest 14% over the limit.
  • Flow, in conduit or thru treatment plant: 2 limits, 9 violations of any kind, 0 effluent exceedances.
  • pH: 2 limits, 8 violations of any kind, 0 effluent exceedances.
  • Oxygen, dissolved [DO]: 2 limits, 4 violations of any kind, 0 effluent exceedances.
  • Flow, wastewater by-passing trtmnt plant: 0 limits, 4 violations of any kind, 0 effluent exceedances.
  • Flow, total: 1 limit, 1 violation of any kind, 0 effluent exceedances.
  • E. coli, colony forming units [CFU]: 2 limits, 0 violations of any kind, 0 effluent exceedances.
  • April 15, 2026: Evaluation (S).

Indiana holds 541 Publicly owned treatment works coverages of this permit type in EPA’s file; 233 were issued before IN0040436.

Coverages issued nearest IN0040436

NORTH SALEM WWTP among its neighbors

EPA’s permit file holds 4 discharge permits in the Ross Ditch-East Fork Big Walnut Creek subwatershed (HUC 051202030102), IN0040436 among them. Its county holds 85, 6 of them major permits; IN0040436 is a minor permit.

Other permits in the Ross Ditch-East Fork Big Walnut Creek subwatershed (HUC 051202030102)

Identity

Facility as filedNORTH SALEM WWTP
Permittee as filedNORTH SALEM WWTP
NPDES IDIN0040436
Permit statusAdministratively continued (past its expiration date and still in force until reissued)
Permit typeIndividual permit
Discharger classMinor discharger
Facility typePublicly owned treatment works
ProgramPublicly owned treatment works
IssuedOctober 2, 2018
Expiration dateJanuary 31, 2024
Issuing agencyIDEM
AddressNorth Salem, IN 46165
Receiving waterMIDDLE FORK OF BIG WALNUT CREEK
SubwatershedRoss Ditch-East Fork Big Walnut Creek (HUC 051202030102)
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
Solids, total suspended43021February 28, 2022811% over the limit
Chlorine, total residual41212September 30, 2015900% over the limit
Nitrogen, ammonia total [as N]8182May 31, 200921% over the limit
BOD, carbonaceous [5 day, 20 C]4142March 31, 200014% over the limit
Flow, in conduit or thru treatment plant290
pH280
Oxygen, dissolved [DO]240
Flow, wastewater by-passing trtmnt plant040
Flow, total110
E. coli, colony forming units [CFU]200

Inspections, violations and enforcement

EPA’s single-event violation file, as loaded, holds no violation for NPDES IN0040436.

Inspections

DateWhat EPA recordedAgency
April 15, 2026EvaluationS

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 IN0040436.

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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 Clean Water Act discharge permit NPDES IN0040436 for NORTH SALEM WWTP in North Salem, IN, which discharges to MIDDLE FORK OF BIG WALNUT CREEK in watershed HUC 051202030102. The permit is listed as administratively continued, with 9 as its discharger class, 4 pollutants under a numeric limit, and 4 pollutants with an effluent exceedance.