Clean Water Act discharge permit · NPDES MO0054496

KNOB NOSTER VALLEY HILL WWTF, Knob Noster, MO: NPDES MO0054496 discharge permit, effluent exceedances, inspections, penalties

Administratively continuedPermit status
MinorDischarger class
9Pollutants under a numeric limit
0Pollutants with an effluent exceedance

KNOB NOSTER VALLEY HILL WWTF, held by City of Knob Noster, holds NPDES permit MO0054496, which discharges to Tributary To Clear Fk.. EPA’s file records it issued October 25, 2016 and expiring September 30, 2021. The status and dates are as EPA’s permit file stood when Velarion loaded it (October 14, 2026); EPA’s free Detailed Facility Report on ECHO carries the permit’s current standing.

Identity

Facility as filed	KNOB NOSTER VALLEY HILL WWTF
Permittee as filed	City of Knob Noster
NPDES ID	MO0054496
Permit status	Administratively continued (past its expiration date and still in force until reissued)
Permit type	Individual permit
Discharger class	Minor discharger
Facility type	Publicly owned treatment works
Program	Publicly owned treatment works
Issued	October 25, 2016
Expiration date	September 30, 2021
Address	Knob Noster, MO 65336
Receiving water	Tributary to Clear Fk.
Subwatershed	Clear Fork (HUC 103001040303)
SIC	4952 – Sewerage Systems

Cited to the EPA ICIS-NPDES permit file (ECHO download) and EPA’s NAICS/SIC and component files, the same download.

Effluent limits and exceedances

9Pollutants on file
9Under a numeric limit
7With a violation of any kind
0With an effluent exceedance

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 measure	Limits	Violations, any kind
BOD, 5-day, 20 deg. C	3	10
Solids, total suspended	3	8
Nitrogen, ammonia total [as N]	4	4
Oil and grease [soxhlet extr.] tot.	2	4
Flow, in conduit or thru treatment plant	2	4
E. coli	2	4
pH	1	2
Toxicity [acute], Ceriodaphnia dubia	1	0
Toxicity [acute], Pimephales promelas [Fathead Minnow]	1	0

EPA’s effluent violation file records no exceedance of a numeric limit for NPDES MO0054496.

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

2Single-event violations

Date	What EPA recorded	Agency
August 18, 2022	Permit Violations - Violation Specified in Comment	ST6
August 18, 2022	Management Practice Violations - Improper Operation and Maintenance	ST6

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 MO0054496 there.

Nearby on the register

Figures from EPA’s ICIS-NPDES download, loaded October 14, 2026.

This public-records page covers Clean Water Act discharge permit NPDES MO0054496, held by City of Knob Noster for the KNOB NOSTER VALLEY HILL WWTF in Knob Noster, MO, which discharges to Tributary To Clear Fk. The page lists a permit status of administratively continued, a discharger class of 9, 0 pollutants under a numeric limit, and 0 pollutants with an effluent exceedance.