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NPDES ILG580247 · Clean Water Act

POTOMAC STP, Potomac, IL: NPDES ILG580247 discharge permit, effluent exceedances, inspections, penalties

POTOMAC STP, Potomac, Illinois: General permit coverage ILG580247, held by POTOMAC, VILLAGE OF; Publicly owned treatment works; Administratively continued; issued November 19, 2014, term to June 30, 2018; discharges to BLUEGRASS CREEK.

  • Solids, total suspended: 5 limits, 175 violations of any kind, 53 effluent exceedances, latest May 31, 2026, largest 219% over the limit.
  • BOD, carbonaceous [5 day, 20 C]: 4 limits, 113 violations of any kind, 17 effluent exceedances, latest February 28, 2022, largest 984% over the limit.
  • Oxygen, dissolved [DO]: 1 limit, 26 violations of any kind, 4 effluent exceedances, latest May 31, 2026, largest 50% over the limit.
  • Flow, in conduit or thru treatment plant: 4 limits, 102 violations of any kind.
  • pH: 2 limits, 51 violations of any kind.
  • BOD, 5-day, 20 deg. C: 1 limit, 26 violations of any kind.
  • Chlorine, total residual: 1 limit, 25 violations of any kind.
  • Nitrogen, ammonia total [as N]: 1 limit, 21 violations of any kind.
  • Coliform, fecal general: 1 limit, 11 violations of any kind.

Illinois holds 247 Publicly owned treatment works coverages of this permit type in EPA’s file; 203 were issued before ILG580247.

Coverages issued nearest ILG580247

POTOMAC STP among its neighbors

2 discharge permits are in the Bluegrass Creek subwatershed (HUC 051201090504); ILG580247 is one. Its county: 85, 2 major; ILG580247 is minor permit.

Other permits in the Bluegrass Creek subwatershed (HUC 051201090504)

Identity

FacilityPOTOMAC STP
PermitteePOTOMAC, VILLAGE OF
NPDES IDILG580247
StatusAdministratively continued
TypeGeneral permit coverage
ClassMinor
Facility typePublicly owned treatment works
ProgramPublicly owned treatment works
IssuedNovember 19, 2014
ExpiresJune 30, 2018
AddressPotomac, IL 61865
Receiving waterBLUEGRASS CREEK
SubwatershedBluegrass Creek (HUC 051201090504)

NPDES ILG580247: effluent limits and exceedances

POTOMAC STP (NPDES ILG580247): 9 pollutants on file, 9 limited; 9 with a violation of any kind, 3 with an exceedance.

How exceedances are counted.

PollutantLimitsViolationsExceedancesLatestLargest, as filed
Solids, total suspended517553May 31, 2026219% over the limit
BOD, carbonaceous [5 day, 20 C]411317February 28, 2022984% over the limit
Oxygen, dissolved [DO]1264May 31, 202650% over the limit
Flow, in conduit or thru treatment plant41020
pH2510
BOD, 5-day, 20 deg. C1260
Chlorine, total residual1250
Nitrogen, ammonia total [as N]1210
Coliform, fecal general1110

NPDES ILG580247: inspections, violations and enforcement

NPDES ILG580247 (POTOMAC STP): no single-event violation, inspection, formal enforcement action and informal enforcement action on file.

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Permits near NPDES ILG580247

NPDES ILG580247: 9 pollutant rows, 0 dated events; ICIS-NPDES download, loaded September 15, 2026.