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NPDES MO0093513 · Clean Water Act

HANNIBAL WWTP, Hannibal, MO: NPDES MO0093513 discharge permit, effluent exceedances, inspections, penalties

HANNIBAL WWTP, Hannibal, Missouri: Individual permit MO0093513, held by Hannibal Board of Public Works; Publicly owned treatment works; Effective; issued April 18, 2018, term to April 30, 2023; discharges to Mississippi River.

  • BOD, 5-day, 20 deg. C: 0 limits, 100 violations of any kind, 8 effluent exceedances, latest March 31, 2019, largest 42% over the limit.
  • Solids, total suspended: 0 limits, 97 violations of any kind, 5 effluent exceedances, latest March 31, 2018, largest 64% over the limit.
  • BOD, 5-day, percent removal: 0 limits, 5 violations of any kind, 5 effluent exceedances, latest June 30, 2019, largest 58% over the limit.
  • Solids, suspended percent removal: 0 limits, 2 violations of any kind, 2 effluent exceedances, latest April 30, 2019, largest 39% over the limit.
  • Ammonia [as N] + unionized ammonia: 0 limits, 78 violations of any kind, 1 effluent exceedance, latest October 31, 2005, largest 454% over the limit.
  • pH: 0 limits, 39 violations of any kind, 1 effluent exceedance, latest August 31, 2011.
  • E. coli: 0 limits, 1 violation of any kind, 1 effluent exceedance, latest September 30, 2019, largest 284% over the limit.
  • Oil and grease [soxhlet extr.] tot.: 0 limits, 96 violations of any kind.
  • Chlorine, total residual: 0 limits, 24 violations of any kind.
  • Nitrogen, ammonia total [as N]: 0 limits, 14 violations of any kind.
  • Flow, in conduit or thru treatment plant: 0 limits, 12 violations of any kind.
  • E. coli, colony forming units [CFU]: 0 limits, 6 violations of any kind.
  • Pass/Fail Static 48Hr Acute Ceriodaphnia dubia: 0 limits, 6 violations of any kind.
  • LC50 Static 48Hr Acute Pimephales promelas: 0 limits, 6 violations of any kind.
  • Hardness, total [as CaCO3]: 0 limits, 4 violations of any kind.
  • Zinc, total recoverable: 0 limits, 4 violations of any kind.
  • Lead, total recoverable: 0 limits, 4 violations of any kind.
  • Copper, total recoverable: 0 limits, 4 violations of any kind.
  • Phenols: 0 limits, 4 violations of any kind.
  • Coliform, fecal, colony forming units: 0 limits, 2 violations of any kind.
  • LC50 Static 48Hr Acute Ceriodaphnia dubia: 0 limits, 2 violations of any kind.
  • LC50 Static 48Hr Acute Pimephales promelas: 0 limits, 2 violations of any kind.
  • September 15, 2026: Permit Violations - Violation Specified in Comment (ST6).
  • September 8, 2026: Permit Violations - Violation Specified in Comment (ST6).
  • August 19, 2026: Evaluation (S).
  • November 14, 2019: Reporting Violations - Improper/ Incorrect Reporting (ST6).
  • November 14, 2019: Permit Violations - Violation Specified in Comment (ST6).

Missouri holds 756 Publicly owned treatment works coverages of this permit type in EPA’s file; 354 were issued before MO0093513. Hannibal Board of Public Works holds 2 permits in Missouri.

Other permits held by Hannibal Board of Public Works

Coverages issued nearest MO0093513

HANNIBAL WWTP among its neighbors

30 discharge permits are in the Bear Creek subwatershed (HUC 071100040501); MO0093513 is one. Its county: 67, 2 major; MO0093513 is major permit.

Other permits in the Bear Creek subwatershed (HUC 071100040501)

Identity

FacilityHANNIBAL WWTP
PermitteeHannibal Board of Public Works
NPDES IDMO0093513
StatusEffective
TypeIndividual permit
ClassMajor
Facility typePublicly owned treatment works
ProgramPublicly owned treatment works
IssuedApril 18, 2018
ExpiresApril 30, 2023
AddressHannibal, MO 63401
Receiving waterMississippi River
SubwatershedBear Creek (HUC 071100040501)
Program components on fileBiosolids, POTW, Pretreatment
SIC4952 – Sewerage Systems

NPDES MO0093513: effluent limits and exceedances

HANNIBAL WWTP (NPDES MO0093513): 22 pollutants on file, 0 limited; 22 with a violation of any kind, 7 with an exceedance.

How exceedances are counted.

PollutantLimitsViolationsExceedancesLatestLargest, as filed
BOD, 5-day, 20 deg. C01008March 31, 201942% over the limit
Solids, total suspended0975March 31, 201864% over the limit
BOD, 5-day, percent removal055June 30, 201958% over the limit
Solids, suspended percent removal022April 30, 201939% over the limit
Ammonia [as N] + unionized ammonia0781October 31, 2005454% over the limit
pH0391August 31, 2011
E. coli011September 30, 2019284% over the limit
Oil and grease [soxhlet extr.] tot.0960
Chlorine, total residual0240
Nitrogen, ammonia total [as N]0140
Flow, in conduit or thru treatment plant0120
E. coli, colony forming units [CFU]060
Pass/Fail Static 48Hr Acute Ceriodaphnia dubia060
LC50 Static 48Hr Acute Pimephales promelas060
Hardness, total [as CaCO3]040
Zinc, total recoverable040
Lead, total recoverable040
Copper, total recoverable040
Phenols040
Coliform, fecal, colony forming units020
LC50 Static 48Hr Acute Ceriodaphnia dubia020
LC50 Static 48Hr Acute Pimephales promelas020

NPDES MO0093513: inspections, violations and enforcement

NPDES MO0093513: 4 single-event violations

DateWhat EPA recordedAgency
September 15, 2026Permit Violations - Violation Specified in CommentST6
September 8, 2026Permit Violations - Violation Specified in CommentST6
November 14, 2019Reporting Violations - Improper/ Incorrect ReportingST6
November 14, 2019Permit Violations - Violation Specified in CommentST6

NPDES MO0093513: 1 inspection

DateWhat EPA recordedAgency
August 19, 2026EvaluationS

NPDES MO0093513 (HANNIBAL WWTP): no formal enforcement action and informal enforcement action on file.

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Permits near NPDES MO0093513

NPDES MO0093513: 22 pollutant rows, 5 dated events; ICIS-NPDES download, loaded October 14, 2026.