Clean Water Act discharge permit · NPDES MNG585020

GIBBON WWTP, Gibbon, MN: NPDES MNG585020 discharge permit, effluent exceedances, inspections, penalties

Administratively continuedPermit status
MinorDischarger class
13Pollutants under a numeric limit
1Pollutants with an effluent exceedance
0Inspections on file
0Formal enforcement actions

GIBBON WWTP, held by Gibbon city of, holds NPDES permit MNG585020. EPA’s file records it issued January 1, 2022 and expiring November 30, 2023.

GIBBON WWTP, Gibbon, Minnesota: Coverage under a general permit MNG585020, held by Gibbon city of; Publicly owned treatment works; Administratively continued (past its expiration date and still in force until reissued); issued January 1, 2022, term to November 30, 2023, by STA.

Solids, total suspended: 5 limits, 1 violation of any kind, 1 effluent exceedance, latest April 30, 2022, largest 9% over the limit.
Flow, in conduit or thru treatment plant: 9 limits, 0 violations of any kind, 0 effluent exceedances.
BOD, carbonaceous [5 day, 20 C]: 5 limits, 0 violations of any kind, 0 effluent exceedances.
Phosphorus, total [as P]: 4 limits, 0 violations of any kind, 0 effluent exceedances.
pH: 3 limits, 0 violations of any kind, 0 effluent exceedances.
Nitrogen, total [as N]: 2 limits, 0 violations of any kind, 0 effluent exceedances.
Nitrogen, Kjeldahl, total [as N]: 2 limits, 0 violations of any kind, 0 effluent exceedances.
Nitrite + Nitrate total [as N]: 2 limits, 0 violations of any kind, 0 effluent exceedances.
Precipitation, total defined period/in: 1 limit, 0 violations of any kind, 0 effluent exceedances.
Oxygen, dissolved [DO]: 1 limit, 0 violations of any kind, 0 effluent exceedances.
Nitrogen, ammonia total [as N]: 1 limit, 0 violations of any kind, 0 effluent exceedances.
Coliform, fecal MPN + membrane ftl 44.5 C: 1 limit, 0 violations of any kind, 0 effluent exceedances.
Solids, total dissolved: 1 limit, 0 violations of any kind, 0 effluent exceedances.

Minnesota holds 240 Publicly owned treatment works coverages of this permit type in EPA’s file; 194 were issued before MNG585020.

Coverages issued nearest MNG585020

August 1, 2021: SILVER LAKE WWTP, Silver Lake, MNG585164, held by Silver Lake city of
August 1, 2021: WINTON WWTP, Winton, MNG585187, held by Winton city of
August 1, 2021: EVAN WWTP, Evan, MNG585202, held by Evan city of
August 1, 2021: EAGLE BEND WWTP, Eagle Bend, MNG585383, held by Eagle Bend city of
January 1, 2022: COTTONWOOD WWTP, Cottonwood, MNG585010, held by Cottonwood city of
January 1, 2022: JANESVILLE WWTP, Janesville, MNG585025, held by Janesville city of
January 1, 2022: WINGER WWTP, Winger, MNG585045, held by Winger city of
January 1, 2022: WOOD LAKE WWTP, Wood Lake, MNG585107, held by Wood Lake city of
January 1, 2022: SLAYTON WWTP, Slayton, MNG585191, held by Slayton city of
January 1, 2022: GAYLORD WWTP, Gaylord, MNG585204, held by Gaylord city of

GIBBON WWTP among its neighbors

EPA’s permit file holds 2 discharge permits in the Judicial Ditch No 1 subwatershed (HUC 070200120301), MNG585020 among them. Its county holds 17, 0 of them major permits; MNG585020 is a minor permit.

Other permits in the Judicial Ditch No 1 subwatershed (HUC 070200120301)

GIBBON, Gibbon: MNG580020, minor permit, discharging to JD 1 VIA CD 13, permit term to February 28, 2010

Identity

Facility as filed	GIBBON WWTP
Permittee as filed	Gibbon city of
NPDES ID	MNG585020
Permit status	Administratively continued (past its expiration date and still in force until reissued)
Permit type	Coverage under a general permit
Discharger class	Minor discharger
Facility type	Publicly owned treatment works
Program	Publicly owned treatment works
Issued	January 1, 2022
Expiration date	November 30, 2023
Issuing agency	STA
Address	Gibbon, MN 55335
Subwatershed	Judicial Ditch No 1 (HUC 070200120301)
SIC	4952 – Sewerage Systems

Effluent limits and exceedances

13Pollutants on file
13Under a numeric limit
1With 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	Largest exceedance, as filed
Solids, total suspended	5	1	1	April 30, 2022	9% over the limit
Flow, in conduit or thru treatment plant	9	0	0
BOD, carbonaceous [5 day, 20 C]	5	0	0
Phosphorus, total [as P]	4	0	0
pH	3	0	0
Nitrogen, total [as N]	2	0	0
Nitrogen, Kjeldahl, total [as N]	2	0	0
Nitrite + Nitrate total [as N]	2	0	0
Precipitation, total defined period/in	1	0	0
Oxygen, dissolved [DO]	1	0	0
Nitrogen, ammonia total [as N]	1	0	0
Coliform, fecal MPN + membrane ftl 44.5 C	1	0	0
Solids, total dissolved	1	0	0

Inspections, violations and enforcement

0Single-event violations

EPA’s single-event violation file, as loaded, holds no violation for NPDES MNG585020.

Inspections

EPA’s inspection file holds no inspection for NPDES MNG585020.

Formal enforcement and penalties

0 formal actions, 0 of them with a penalty assessed. Federal and state penalties are separate figures from separate authorities and are shown as each was filed, never added together.

Informal enforcement

EPA’s informal enforcement file holds no action for NPDES MNG585020.

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

This public-records page covers Clean Water Act discharge permit NPDES MNG585020 for the GIBBON WWTP in Gibbon, MN, held by Gibbon city of, with its status and dates as EPA's permit file stood when loaded on October 14, 2026. The page lists 13 pollutants on file, 13 under a numeric limit, 1 with a violation of any kind, and 1 with an effluent exceedance.