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Clean Water Act discharge permit · NPDES MO0088510

LAKE NEHAI TONKAYEA WWTP, Keytesville, MO: NPDES MO0088510 discharge permit, effluent exceedances, inspections, penalties

LAKE NEHAI TONKAYEA WWTP, held by Nehai Property Owners Association, Inc, holds NPDES permit MO0088510, which discharges to Tributary To Mussel Fork Creek. EPA’s file records it issued June 12, 2018 and expiring September 30, 2021.

LAKE NEHAI TONKAYEA WWTP, Keytesville, Missouri: Individual permit MO0088510, held by Nehai Property Owners Association, Inc; Administratively continued (past its expiration date and still in force until reissued); issued June 12, 2018, term to September 30, 2021; discharges to Tributary to Mussel Fork Creek.

  • BOD, 5-day, 20 deg. C: 2 limits, 112 violations of any kind, 70 effluent exceedances, latest June 30, 2026, largest 173% over the limit.
  • Chlorine, total residual: 2 limits, 84 violations of any kind, 54 effluent exceedances, latest June 30, 2026, largest 12,122% over the limit.
  • E. coli: 2 limits, 39 violations of any kind, 27 effluent exceedances, latest October 31, 2025, largest 99,999% over the limit.
  • Solids, total suspended: 2 limits, 66 violations of any kind, 24 effluent exceedances, latest May 31, 2025, largest 142% over the limit.
  • E. coli, colony forming units [CFU]: 0 limits, 55 violations of any kind, 23 effluent exceedances, latest June 30, 2018, largest 99,999% over the limit.
  • Ammonia [as N] + unionized ammonia: 0 limits, 37 violations of any kind, 19 effluent exceedances, latest June 30, 2018, largest 5,815% over the limit.
  • Nitrogen, ammonia total [as N]: 8 limits, 34 violations of any kind, 12 effluent exceedances, latest December 31, 2025, largest 75% over the limit.
  • pH: 2 limits, 55 violations of any kind, 11 effluent exceedances, latest September 30, 2021.
  • Oil and grease [soxhlet extr.] tot.: 2 limits, 48 violations of any kind, 8 effluent exceedances, latest April 30, 2024, largest 150% over the limit.
  • Flow, in conduit or thru treatment plant: 2 limits, 44 violations of any kind, 0 effluent exceedances.
  • September 14, 2026: Effluent Violations - Numeric effluent violation (ST6).
  • June 22, 2026: Effluent Violations - Numeric effluent violation (ST6).
  • June 15, 2026: Permit Violations - Violation Specified in Comment (ST6).
  • June 15, 2026: Management Practice Violations - Improper Operation and Maintenance (ST6).
  • June 15, 2026: Effluent Violations - Numeric effluent violation (ST6).
  • June 15, 2026: Reporting Violations - Improper/ Incorrect Reporting (ST6).
  • May 28, 2026: Evaluation (S).
  • May 28, 2026: Evaluation (S).
  • November 16, 2023: Reporting Violations - Failure to Submit DMRs (ST6).
  • May 26, 2021: Permit Violations - Violation Specified in Comment (ST6).
  • May 26, 2021: Reporting Violations - Improper/ Incorrect Reporting (ST6).
  • May 26, 2021: Effluent Violations - Numeric effluent violation (ST6).
  • September 30, 2020: Effluent Violations - Numeric effluent violation (ST6).
  • June 30, 2020: Reporting Violations - Failure to Submit DMRs (ST6).
  • July 9, 2019: Reporting Violations - Failure to Submit DMRs (ST6).
  • December 29, 2017: Effluent Violations - Numeric effluent violation (ST6).
  • March 30, 2017: Reporting Violations - Improper/ Incorrect Reporting (ST6).

LAKE NEHAI TONKAYEA WWTP among its neighbors

Its county holds 35, 0 of them major permits; MO0088510 is a minor permit.

Other permits in the county

  • AGRISERVICES OF BRUNSWICK WEST, Brunswick: MORA28790, minor permit, discharging to Tributary to Missouri R., permit term to February 7, 2027
  • BOONE QUARRIES MARCELINE, Marceline: MOG490824, minor permit, discharging to Tributary to Clarks Creek, permit term to April 30, 2027
  • BRUNSWICK WWTF, Brunswick: MO0032557, minor permit, discharging to Grand River, permit term to September 30, 2022
  • CON- AGG OF MO, LLC, Salisbury: MOG490422, minor permit, discharging to Chariton R., permit term to October 5, 2011
  • DOLLAR GENERAL, Keytesville: MORA23794, minor permit, discharging to Tributary to Long Cr., permit term to February 7, 2027
  • HURTT FABRICATION, Marceline: MOR203437, minor permit, discharging to Long Branch, permit term to August 31, 2024
  • JD WRIGHT, Keytesville: MOG010685, minor permit, discharging to Tributary to Cottonwood Creek, permit term to February 25, 2023
  • KEYTESVILLE WATER TREATMENT PLANT, Keytesville: MOG640210, minor permit, discharging to Tributary to Mussel Fork Cr., permit term to February 24, 2029
  • KEYTESVILLE WWTF, Keytesville: MO0048640, minor permit, discharging to Mussel Fork Cr., permit term to June 30, 2022
  • L55 MP 254.24 ARMORING PROJECT, Salisbury: MORA30096, minor permit, discharging to Tributary to Puzzle Creek, permit term to February 7, 2027

Identity

Facility as filedLAKE NEHAI TONKAYEA WWTP
Permittee as filedNehai Property Owners Association, Inc
NPDES IDMO0088510
Permit statusAdministratively continued (past its expiration date and still in force until reissued)
Permit typeIndividual permit
Discharger classMinor discharger
Facility typeNot a publicly owned treatment works
IssuedJune 12, 2018
Expiration dateSeptember 30, 2021
AddressKeytesville, MO 65261
Receiving waterTributary to Mussel Fork Creek
SIC8641 – Civic And Social Associations

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
BOD, 5-day, 20 deg. C211270June 30, 2026173% over the limit
Chlorine, total residual28454June 30, 202612,122% over the limit
E. coli23927October 31, 202599,999% over the limit
Solids, total suspended26624May 31, 2025142% over the limit
E. coli, colony forming units [CFU]05523June 30, 201899,999% over the limit
Ammonia [as N] + unionized ammonia03719June 30, 20185,815% over the limit
Nitrogen, ammonia total [as N]83412December 31, 202575% over the limit
pH25511September 30, 2021
Oil and grease [soxhlet extr.] tot.2488April 30, 2024150% over the limit
Flow, in conduit or thru treatment plant2440

Inspections, violations and enforcement

DateWhat EPA recordedAgency
September 14, 2026Effluent Violations - Numeric effluent violationST6
June 22, 2026Effluent Violations - Numeric effluent violationST6
June 15, 2026Permit Violations - Violation Specified in CommentST6
June 15, 2026Management Practice Violations - Improper Operation and MaintenanceST6
June 15, 2026Effluent Violations - Numeric effluent violationST6
June 15, 2026Reporting Violations - Improper/ Incorrect ReportingST6
November 16, 2023Reporting Violations - Failure to Submit DMRsST6
May 26, 2021Permit Violations - Violation Specified in CommentST6
May 26, 2021Reporting Violations - Improper/ Incorrect ReportingST6
May 26, 2021Effluent Violations - Numeric effluent violationST6
September 30, 2020Effluent Violations - Numeric effluent violationST6
June 30, 2020Reporting Violations - Failure to Submit DMRsST6
July 9, 2019Reporting Violations - Failure to Submit DMRsST6
December 29, 2017Effluent Violations - Numeric effluent violationST6
March 30, 2017Reporting Violations - Improper/ Incorrect ReportingST6

Inspections

DateWhat EPA recordedAgency
May 28, 2026EvaluationS
May 28, 2026EvaluationS

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 MO0088510.

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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 MO0088510 for the LAKE NEHAI TONKAYEA WWTP in Keytesville, MO, held by Nehai Property Owners Association, Inc, with a status of administratively continued and a minor discharger classification. The page lists 9 pollutants under a numeric limit and 8 pollutants with an effluent exceedance, and records the permit as issued June 12, 2018 and expiring September 30, 2021.