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NPDES MS0042234 · Clean Water Act

DUNCAN POTW, Duncan, MS: NPDES MS0042234 discharge permit, effluent exceedances, inspections, penalties

DUNCAN POTW, Duncan, Mississippi: Individual permit MS0042234; Publicly owned treatment works; Administratively continued; issued March 16, 2020, term to February 28, 2025, by MDEQ; discharges to HUSHPUCKENA RIVER; Sewage Treatment Facilities.

  • Flow, in conduit or thru treatment plant: 2 limits, 22 violations of any kind, 12 effluent exceedances, latest December 31, 2023, largest 210% over the limit.
  • Solids, total suspended: 8 limits, 51 violations of any kind, 11 effluent exceedances, latest December 31, 2025, largest 101% over the limit.
  • BOD, 5-day, 20 deg. C: 8 limits, 45 violations of any kind, 5 effluent exceedances, latest December 31, 2024, largest 27% over the limit.
  • Chlorine, total residual: 2 limits, 15 violations of any kind, 5 effluent exceedances, latest December 31, 2015, largest 115% over the limit.
  • E. coli: 2 limits, 10 violations of any kind, 2 effluent exceedances, latest December 31, 2024, largest 99,999% over the limit.
  • BOD, 5-day, percent removal: 1 limit, 7 violations of any kind, 2 effluent exceedances, latest December 31, 2024, largest 186% over the limit.
  • Coliform, fecal general: 0 limits, 11 violations of any kind, 1 effluent exceedance, latest December 31, 2012, largest 300% over the limit.
  • Oxygen, dissolved [DO]: 1 limit, 6 violations of any kind, 1 effluent exceedance, latest December 31, 2024, largest 2% over the limit.
  • Nitrogen, total [as N]: 8 limits, 32 violations of any kind.
  • Nitrogen, ammonia total [as N]: 8 limits, 32 violations of any kind.
  • Phosphorus, total [as P]: 8 limits, 32 violations of any kind.
  • pH: 2 limits, 14 violations of any kind.

Mississippi holds 336 Publicly owned treatment works coverages of this permit type in EPA’s file; 288 were issued before MS0042234.

Coverages issued nearest MS0042234

DUNCAN POTW among its neighbors

5 discharge permits are in subwatershed HUC 080302070200; MS0042234 is one. Its county: 33, 2 major; MS0042234 is minor permit.

Other permits in subwatershed HUC 080302070200

Identity

FacilityDUNCAN POTW
PermitteeDUNCAN POTW
NPDES IDMS0042234
StatusAdministratively continued
TypeIndividual permit
ClassMinor
Facility typePublicly owned treatment works
ProgramPublicly owned treatment works
IssuedMarch 16, 2020
ExpiresFebruary 28, 2025
AgencyMDEQ
AddressDuncan, MS 38740
Receiving waterHUSHPUCKENA RIVER
Program components on filePOTW, Pretreatment
NAICS221320 – Sewage Treatment Facilities
SIC4952 – Sewerage Systems

NPDES MS0042234: effluent limits and exceedances

DUNCAN POTW (NPDES MS0042234): 12 pollutants on file, 11 limited; 12 with a violation of any kind, 8 with an exceedance.

How exceedances are counted.

PollutantLimitsViolationsExceedancesLatestLargest, as filed
Flow, in conduit or thru treatment plant22212December 31, 2023210% over the limit
Solids, total suspended85111December 31, 2025101% over the limit
BOD, 5-day, 20 deg. C8455December 31, 202427% over the limit
Chlorine, total residual2155December 31, 2015115% over the limit
E. coli2102December 31, 202499,999% over the limit
BOD, 5-day, percent removal172December 31, 2024186% over the limit
Coliform, fecal general0111December 31, 2012300% over the limit
Oxygen, dissolved [DO]161December 31, 20242% over the limit
Nitrogen, total [as N]8320
Nitrogen, ammonia total [as N]8320
Phosphorus, total [as P]8320
pH2140

NPDES MS0042234: inspections, violations and enforcement

NPDES MS0042234 (DUNCAN POTW): no single-event violation, inspection, formal enforcement action and informal enforcement action on file.

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Permits near NPDES MS0042234

NPDES MS0042234: 12 pollutant rows, 0 dated events; ICIS-NPDES download, loaded October 14, 2026.