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NPDES MN0030171 · Clean Water Act

MANKATO WATER RESOURCE RECOVERY FACILITY, Mankato, MN: NPDES MN0030171 discharge permit, effluent exceedances, inspections, penalties

MANKATO WATER RESOURCE RECOVERY FACILITY, Mankato, Minnesota: Individual permit MN0030171, held by Mankato Water Resource Recovery Facility; Publicly owned treatment works; Administratively continued; issued September 22, 2010, term to August 31, 2015; discharges to MINN R.

20 of the 27 pollutants listed for NPDES MN0030171 have no violation or effluent exceedance.

  • Coliform, tot, MPN, completed, [100 mL]: 1 limit, 6 violations of any kind, 6 effluent exceedances, latest September 30, 2019, largest 650% over the limit.
  • Chlorine, total residual: 1 limit, 4 violations of any kind, 4 effluent exceedances, latest November 30, 2022, largest 1,111% over the limit.
  • pH: 4 limits, 2 violations of any kind, 2 effluent exceedances, latest March 31, 2026.
  • Phosphorus, total [as P]: 6 limits, 1 violation of any kind, 1 effluent exceedance, latest September 30, 2025, largest 3% over the limit.
  • Flow, in conduit or thru treatment plant: 9 limits, 27 violations of any kind.
  • BOD, carb-5 day, 20 deg C, percent removal: 1 limit, 1 violation of any kind.
  • Solids, suspended percent removal: 1 limit, 1 violation of any kind.
  • BOD, carbonaceous [5 day, 20 C]: 10 limits.
  • Nitrogen, ammonia total [as N]: 8 limits.
  • Solids, total suspended: 6 limits.
  • Turbidity: 2 limits.
  • Oxygen, dissolved [DO]: 2 limits.
  • Coliform, fecal MPN + membrane ftl 44.5 C: 2 limits.
  • Mercury, total [as Hg]: 2 limits.
  • Precipitation, total defined period/in: 1 limit.
  • Nitrogen, nitrate total [as N]: 1 limit.
  • Nitrogen, Kjeldahl, total [as N]: 1 limit.
  • Nitrite + Nitrate total [as N]: 1 limit.
  • Cyanide, total [as CN]: 1 limit.
  • Beryllium, total [as Be]: 1 limit.
  • Cadmium, total [as Cd]: 1 limit.
  • Chromium, total [as Cr]: 1 limit.
  • Copper, total [as Cu]: 1 limit.
  • Silver, total [as Ag]: 1 limit.
  • Selenium, total [as Se]: 1 limit.
  • Solids, total dissolved: 1 limit.
  • Phosphorous, in total orthophosphate: 1 limit.
  • October 12, 2021: Monitoring Violations - Failure to Monitor for Toxicity Requirements (ST6).
  • October 12, 2021: Reporting Violations - Failure to submit required report (non-DMR non-pretreatment) (ST6).
  • October 12, 2021: Effluent Violations - Unapproved Bypass (ST6).
  • October 12, 2021: Reporting Violations - Failure to Notify (ST6).
  • October 12, 2021: Effluent Violations - Narrative Effluent Violation (ST6).
  • October 12, 2021: Management Practice Violations - Best Management Practice Deficiencies (ST6).

Minnesota holds 345 Publicly owned treatment works coverages of this permit type in EPA’s file; 71 were issued before MN0030171.

Coverages issued nearest MN0030171

MANKATO WATER RESOURCE RECOVERY FACILITY among its neighbors

10 discharge permits are in the City of Mankato-Minnesota River subwatershed (HUC 070200071102); MN0030171 is one. Its county: 43, 1 major; MN0030171 is major permit.

Other permits in the City of Mankato-Minnesota River subwatershed (HUC 070200071102)

Identity

FacilityMANKATO WATER RESOURCE RECOVERY FACILITY
PermitteeMankato Water Resource Recovery Facility
NPDES IDMN0030171
StatusAdministratively continued
TypeIndividual permit
ClassMajor
Facility typePublicly owned treatment works
ProgramPublicly owned treatment works
IssuedSeptember 22, 2010
ExpiresAugust 31, 2015
AddressMankato, MN 56001
Receiving waterMINN R
Receiving water impaired303(D) Listed
SubwatershedCity of Mankato-Minnesota River (HUC 070200071102)
Program components on filePOTW, Pretreatment
SIC4952 – Sewerage Systems
Other EPA IDs (FRS)RCRA handler MND985749779

NPDES MN0030171: effluent limits and exceedances

MANKATO WATER RESOURCE RECOVERY FACILITY (NPDES MN0030171): 27 pollutants on file, 27 limited; 7 with a violation of any kind, 4 with an exceedance.

How exceedances are counted.

PollutantLimitsViolationsExceedancesLatestLargest, as filed
Coliform, tot, MPN, completed, [100 mL]166September 30, 2019650% over the limit
Chlorine, total residual144November 30, 20221,111% over the limit
pH422March 31, 2026
Phosphorus, total [as P]611September 30, 20253% over the limit
Flow, in conduit or thru treatment plant9270
BOD, carb-5 day, 20 deg C, percent removal110
Solids, suspended percent removal110
BOD, carbonaceous [5 day, 20 C]1000
Nitrogen, ammonia total [as N]800
Solids, total suspended600
Turbidity200
Oxygen, dissolved [DO]200
Coliform, fecal MPN + membrane ftl 44.5 C200
Mercury, total [as Hg]200
Precipitation, total defined period/in100
Nitrogen, nitrate total [as N]100
Nitrogen, Kjeldahl, total [as N]100
Nitrite + Nitrate total [as N]100
Cyanide, total [as CN]100
Beryllium, total [as Be]100
Cadmium, total [as Cd]100
Chromium, total [as Cr]100
Copper, total [as Cu]100
Silver, total [as Ag]100
Selenium, total [as Se]100
Solids, total dissolved100
Phosphorous, in total orthophosphate100

NPDES MN0030171: inspections, violations and enforcement

NPDES MN0030171: 6 single-event violations

DateWhat EPA recordedAgency
October 12, 2021Monitoring Violations - Failure to Monitor for Toxicity RequirementsST6
October 12, 2021Reporting Violations - Failure to submit required report (non-DMR non-pretreatment)ST6
October 12, 2021Effluent Violations - Unapproved BypassST6
October 12, 2021Reporting Violations - Failure to NotifyST6
October 12, 2021Effluent Violations - Narrative Effluent ViolationST6
October 12, 2021Management Practice Violations - Best Management Practice DeficienciesST6

NPDES MN0030171 (MANKATO WATER RESOURCE RECOVERY FACILITY): no inspection, formal enforcement action and informal enforcement action on file.

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Permits near NPDES MN0030171

NPDES MN0030171: 27 pollutant rows, 6 dated events; ICIS-NPDES download, loaded October 14, 2026.