Clean Water Act discharge permit · NPDES NDG524899

MAYVILLE WTP, Mayville, ND: NPDES NDG524899 discharge permit, effluent exceedances, inspections, penalties

EffectivePermit status
MinorDischarger class
13Pollutants under a numeric limit
0Pollutants with an effluent exceedance

MAYVILLE WTP, held by Mayville City Of, holds NPDES permit NDG524899, which discharges to Lower Sheyenne. EPA’s file records it issued March 15, 2019 and expiring September 30, 2027. 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.

What the register holds for MAYVILLE WTP: its NPDES ID, its permit type and status, its dates, its address in Mayville, North Dakota, its receiving water, and 13 pollutants under a numeric limit. EPA’s effluent violation file and its single-event violation file hold no violation for NPDES NDG524899.

Identity

Facility as filed	MAYVILLE WTP
Permittee as filed	Mayville City Of
NPDES ID	NDG524899
Permit status	Effective
Permit type	Coverage under a general permit
Discharger class	Minor discharger
Facility type	Not a publicly owned treatment works
Issued	March 15, 2019
Expiration date	September 30, 2027
Issuing agency	North Dakota Department of Environmental Quality
Address	Mayville, ND 58257
Receiving water	Lower Sheyenne
Subwatershed	Mayville Drain No 9-Goose River (HUC 090201090602)

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

Effluent limits and exceedances

13Pollutants on file
13Under a numeric limit
0With 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	Effluent exceedances	Latest exceedance	Largest exceedance, as filed
Conductivity	3	0	0
Oxygen, dissolved [DO]	3	0	0
Solids, total suspended	3	0	0
Chloride [as Cl]	3	0	0
Sulfate, total [as SO4]	3	0	0
Iron, total [as Fe]	3	0	0
Manganese, total [as Mn]	3	0	0
Chlorine, total residual	3	0	0
BOD, 5-day, 20 deg. C	2	0	0
pH	2	0	0
Flow, in conduit or thru treatment plant	2	0	0
Flow, total	1	0	0
Duration of discharge	1	0	0

EPA’s effluent violation file records no exceedance of a numeric limit for NPDES NDG524899.

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 NDG524899.

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, NDG524899.

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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 NDG524899 there.

Nearby on the register

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

This public-records page covers Clean Water Act discharge permit NPDES NDG524899 for MAYVILLE WTP in Mayville, ND, which is effective and classed as a minor discharger, with 13 pollutants under a numeric limit and 0 pollutants with an effluent exceedance. The permit was issued March 15, 2019 and expires September 30, 2027, and the listed status reflects EPA's permit file as of September 15, 2026.