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Clean Water Act discharge permit · NPDES MO0126900

OZARK VILLA WWTP, Shell Knob, MO: NPDES MO0126900 discharge permit, effluent exceedances, inspections, penalties

OZARK VILLA WWTP, held by Shell Knob Seniors Incorporated, holds NPDES permit MO0126900, which discharges to Tributary To Big Cr.. EPA’s file records it issued October 31, 2018 and expiring September 30, 2023. The status and dates are as EPA’s permit file stood when Velarion loaded it (September 15, 2026); EPA’s free Detailed Facility Report on ECHO carries the permit’s current standing.

Identity

Facility as filedOZARK VILLA WWTP
Permittee as filedShell Knob Seniors Incorporated
NPDES IDMO0126900
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
IssuedOctober 31, 2018
Expiration dateSeptember 30, 2023
AddressShell Knob, MO 65747
Receiving waterTributary to Big Cr.
SubwatershedBig Creek-Table Rock Lake (HUC 110100011204)

Cited to the EPA ICIS-NPDES permit file (ECHO download).

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
Phosphorus, total [as P]15622June 30, 2026558% over the limit
Nitrogen, ammonia total [as N]82321June 30, 20261,285% over the limit
Aluminum, total recoverable42117September 30, 20241,455% over the limit
Solids, total suspended264June 30, 20261,300% over the limit
E. coli, colony forming units [CFU]0102September 30, 2016226% over the limit
E. coli242June 30, 2026703% over the limit
BOD, 5-day, 20 deg. C231March 31, 20245% over the limit
pH231March 31, 2023
Iron, total recoverable240
Flow, in conduit or thru treatment plant220

Cited to the EPA ICIS-NPDES limits and effluent violations files (ECHO download); up to 60 rows shown, most exceedances first.

Inspections, violations and enforcement

DateWhat EPA recordedAgency
March 31, 2025Effluent Violations - Numeric effluent violationST6
December 26, 2024Effluent Violations - Numeric effluent violationST6
September 25, 2024Effluent Violations - Numeric effluent violationST6
August 6, 2024Management Practice Violations - Improper Operation and MaintenanceST6
August 6, 2024Effluent Violations - Numeric effluent violationST6
March 24, 2023Effluent Violations - Numeric effluent violationST6
September 21, 2021Effluent Violations - Numeric effluent violationST6
September 21, 2020Reporting Violations - Failure to Submit DMRsST6
June 9, 2017Effluent Violations - Numeric effluent violationST6

Velarion’s copy of EPA’s ICIS-NPDES files does not include the inspections, formal enforcement actions and informal enforcement actions files, so this page shows none of them. EPA’s free Detailed Facility Report on ECHO lists this permit’s inspections, enforcement actions and penalties.

Cited to the EPA ICIS-NPDES violation, inspection and enforcement files (ECHO download); up to 50 rows of each shown, newest first.

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EPA publishes a free Detailed Facility Report for every permit on ECHO: its compliance status quarter by quarter, its inspections, and its enforcement actions and penalties. EPA also sends free notices of new inspections and enforcement actions through ECHO Notify; enter NPDES ID MO0126900 there.

Nearby on the register

Figures from EPA’s ICIS-NPDES download, loaded September 15, 2026.