Clean Water Act discharge permit · NPDES MO0055387

MIDDLETOWN CITY WWTF, Middletown, MO: NPDES MO0055387 discharge permit, effluent exceedances, inspections, penalties

EffectivePermit status
MinorDischarger class
13Pollutants under a numeric limit
1Pollutants with an effluent exceedance

MIDDLETOWN CITY WWTF, held by City of Middletown, holds NPDES permit MO0055387, which discharges to Coon Cr.. EPA’s file records it issued August 13, 2019 and expiring June 30, 2024. 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	MIDDLETOWN CITY WWTF
Permittee as filed	City of Middletown
NPDES ID	MO0055387
Permit status	Effective
Permit type	Individual permit
Discharger class	Minor discharger
Facility type	Publicly owned treatment works
Program	Publicly owned treatment works
Issued	August 13, 2019
Expiration date	June 30, 2024
Address	Middletown, MO 63359
Receiving water	Coon Cr.
Subwatershed	Coon Creek (HUC 071100080104)
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

15Pollutants on file
13Under a numeric limit
15With a violation of any kind
1With 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	Effluent exceedances	Latest exceedance
pH	2	11	1	December 31, 2018
Nitrogen, ammonia total [as N]	2	64	0
BOD, 5-day, 20 deg. C	3	24	0
Solids, total suspended	3	24	0
Flow, in conduit or thru treatment plant	2	18	0
Oxygen, dissolved [DO]	2	14	0
Chlorine, total residual	2	14	0
E. coli	2	10	0
Oil and grease [soxhlet extr.] tot.	2	6	0
Day - max excursion time [min]	2	2	0
BOD, 5-day, percent removal	1	2	0
Solids, suspended percent removal	1	2	0
Duration of discharge	1	2	0
Toxicity [acute], Ceriodaphnia dubia	0	1	0
Toxicity [acute], Pimephales promelas [Fathead Minnow]	0	1	0

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
November 28, 2018	Reporting Violations - Failure to submit required report (non-DMR non-pretreatment)	ST6
June 29, 2018	Reporting Violations - Improper/ Incorrect Reporting	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 MO0055387 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 MO0055387 for the MIDDLETOWN CITY WWTF in Middletown, MO, held by City of Middletown and discharging to Coon Cr. The page lists the permit as Effective, with a Minor Discharger class, 15 pollutants on file, 13 under a numeric limit, and 1 with an effluent exceedance.