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Clean Water Act discharge permit · NPDES IN0020508

CHARLESTOWN MUNICIPAL WWTP, Charlestown, IN: NPDES IN0020508 discharge permit, effluent exceedances, inspections, penalties

CHARLESTOWN MUNICIPAL WWTP, held by CHARLESTOWN WASTEWATER TREATMENT PLANT, holds NPDES permit IN0020508, which discharges to Ohio River 14 Mile Creek Unnmd Trib. EPA’s file records it issued December 30, 2022 and expiring February 29, 2028.

CHARLESTOWN MUNICIPAL WWTP, Charlestown, Indiana: Individual permit IN0020508, held by CHARLESTOWN WASTEWATER TREATMENT PLANT; Publicly owned treatment works; Effective; issued December 30, 2022, term to February 29, 2028, by IDEM; discharges to OHIO RIVER 14 MILE CREEK UNNMD TRIB; Sewage Treatment Facilities.

  • Solids, total suspended: 12 limits, 47 violations of any kind, 39 effluent exceedances, latest July 31, 2021, largest 225% over the limit.
  • BOD, carbonaceous [5 day, 20 C]: 12 limits, 37 violations of any kind, 25 effluent exceedances, latest August 31, 2002, largest 122% over the limit.
  • E. coli, colony forming units [CFU]: 4 limits, 23 violations of any kind, 20 effluent exceedances, latest June 30, 2026, largest 5,414% over the limit.
  • Solids, suspended percent removal: 0 limits, 19 violations of any kind, 19 effluent exceedances, latest August 31, 2002, largest 260% over the limit.
  • BOD, carb-5 day, 20 deg C, percent removal: 0 limits, 14 violations of any kind, 13 effluent exceedances, latest August 31, 2002, largest 160% over the limit.
  • Chlorine, total residual: 0 limits, 10 violations of any kind, 10 effluent exceedances, latest October 31, 2002, largest 1,550% over the limit.
  • Phosphorus, total [as P]: 4 limits, 7 violations of any kind, 6 effluent exceedances, latest April 30, 2025, largest 80% over the limit.
  • Nitrogen, ammonia total [as N]: 16 limits, 11 violations of any kind, 3 effluent exceedances, latest February 28, 2026, largest 458% over the limit.
  • Oxygen, dissolved [DO]: 2 limits, 4 violations of any kind, 1 effluent exceedance, latest September 30, 2021, largest 22% over the limit.
  • Flow, in conduit or thru treatment plant: 2 limits, 8 violations of any kind, 0 effluent exceedances.
  • pH: 4 limits, 6 violations of any kind, 0 effluent exceedances.
  • Flow, wastewater by-passing trtmnt plant: 0 limits, 2 violations of any kind, 0 effluent exceedances.
  • Number of Events: 0 limits, 2 violations of any kind, 0 effluent exceedances.
  • Nitrogen, total [as N]: 2 limits, 0 violations of any kind, 0 effluent exceedances.
  • Nitrogen, Kjeldahl, total [as N]: 2 limits, 0 violations of any kind, 0 effluent exceedances.
  • Nitrite + Nitrate total [as N]: 2 limits, 0 violations of any kind, 0 effluent exceedances.
  • Flow, total: 2 limits, 0 violations of any kind, 0 effluent exceedances.

Indiana holds 541 Publicly owned treatment works coverages of this permit type in EPA’s file; 539 were issued before IN0020508.

Coverages issued nearest IN0020508

CHARLESTOWN MUNICIPAL WWTP among its neighbors

EPA’s permit file holds 23 discharge permits in the Dry Branch-Fourteen Mile Creek subwatershed (HUC 051401010404), IN0020508 among them. Its county holds 103, 7 of them major permits; IN0020508 is a major permit.

Other permits in the Dry Branch-Fourteen Mile Creek subwatershed (HUC 051401010404)

Identity

Facility as filedCHARLESTOWN MUNICIPAL WWTP
Permittee as filedCHARLESTOWN WASTEWATER TREATMENT PLANT
NPDES IDIN0020508
Permit statusEffective
Permit typeIndividual permit
Discharger classMajor discharger
Facility typePublicly owned treatment works
ProgramPublicly owned treatment works
IssuedDecember 30, 2022
Expiration dateFebruary 29, 2028
Issuing agencyIDEM
AddressCharlestown, IN 47111
Receiving waterOHIO RIVER 14 MILE CREEK UNNMD TRIB
SubwatershedDry Branch-Fourteen Mile Creek (HUC 051401010404)
Program components on fileBiosolids, POTW
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
Solids, total suspended124739July 31, 2021225% over the limit
BOD, carbonaceous [5 day, 20 C]123725August 31, 2002122% over the limit
E. coli, colony forming units [CFU]42320June 30, 20265,414% over the limit
Solids, suspended percent removal01919August 31, 2002260% over the limit
BOD, carb-5 day, 20 deg C, percent removal01413August 31, 2002160% over the limit
Chlorine, total residual01010October 31, 20021,550% over the limit
Phosphorus, total [as P]476April 30, 202580% over the limit
Nitrogen, ammonia total [as N]16113February 28, 2026458% over the limit
Oxygen, dissolved [DO]241September 30, 202122% over the limit
Flow, in conduit or thru treatment plant280
pH460
Flow, wastewater by-passing trtmnt plant020
Number of Events020
Nitrogen, total [as N]200
Nitrogen, Kjeldahl, total [as N]200
Nitrite + Nitrate total [as N]200
Flow, total200

Inspections, violations and enforcement

EPA’s single-event violation file, as loaded, holds no violation for NPDES IN0020508.

Inspections

EPA’s inspection file holds no inspection for NPDES IN0020508.

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 IN0020508.

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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 IN0020508 for the CHARLESTOWN MUNICIPAL WWTP in Charlestown, IN, which lists an Effective permit status and a Major Discharger class. The facts list 12 pollutants under a numeric limit and 9 pollutants with an effluent exceedance.