Clean Water Act discharge permit · NPDES MOG640021

MARQUAND WATER SYSTEM, Marquand, MO: NPDES MOG640021 discharge permit, effluent exceedances, inspections, penalties

EffectivePermit status
MinorDischarger class
21Pollutants under a numeric limit
2Pollutants with an effluent exceedance

MARQUAND WATER SYSTEM, held by CITY OF MARQUAND, holds NPDES permit MOG640021, which discharges to Tributary To Castor R.. EPA’s file records it issued May 7, 2024 and expiring February 24, 2029. 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	MARQUAND WATER SYSTEM
Permittee as filed	CITY OF MARQUAND
NPDES ID	MOG640021
Permit status	Effective
Permit type	Coverage under a general permit
Discharger class	Minor discharger
Facility type	Not a publicly owned treatment works
Issued	May 7, 2024
Expiration date	February 24, 2029
Address	Marquand, MO 63655
Receiving water	Tributary to Castor R.
Subwatershed	Wash Creek-Castor River (HUC 071401070204)
SIC	4941 – Water Supply

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

21Pollutants on file
21Under a numeric limit
21With a violation of any kind
2With 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	Largest exceedance, as filed
Chlorine, total residual	2	14	8	September 30, 2009	36% over the limit
Solids, settleable	2	13	2	December 31, 2019	400% over the limit
pH	3	11	0
Flow, in conduit or thru treatment plant	2	8	0
Phosphorus, total [as P]	2	4	0
Total production - mass	2	2	0
Nitrogen, Kjeldahl, total [as N]	2	2	0
Sodium, total [as Na]	2	2	0
Chloride [as Cl]	2	2	0
Arsenic, total [as As]	2	2	0
Cadmium, total [as Cd]	2	2	0
Chromium, total [as Cr]	2	2	0
Copper, total [as Cu]	2	2	0
Lead, total [as Pb]	2	2	0
Molybdenum, total [as Mo]	2	2	0
Nickel, total [as Ni]	2	2	0
Zinc, total [as Zn]	2	2	0
Aluminum, total [as Al]	2	2	0
Selenium, total [as Se]	2	2	0
Mercury, total [as Hg]	2	2	0
Report due [yrmoda]	1	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

0Single-event violations

EPA’s single-event violation file, as loaded, holds no violation for NPDES MOG640021.

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.

Watch this permit

One permit holder, $99/month. Watch the register for one permit holder and the places and receiving waters tied to its permits. Choose “One permit holder” and enter this permit’s NPDES ID, MOG640021.

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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 MOG640021 there.

Nearby on the register

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