Clean Water Act discharge permit · NPDES MNG585118

ALDEN WWTP, Alden, MN: NPDES MNG585118 discharge permit, effluent exceedances, inspections, penalties

EffectivePermit status
MinorDischarger class
13Pollutants under a numeric limit
3Pollutants with an effluent exceedance
0Inspections on file
0Formal enforcement actions

ALDEN WWTP, held by Alden city of, holds NPDES permit MNG585118. EPA’s file records it issued January 1, 2024 and expiring November 30, 2028.

ALDEN WWTP, Alden, Minnesota: Coverage under a general permit MNG585118, held by Alden city of; Publicly owned treatment works; Effective; issued January 1, 2024, term to November 30, 2028, by STA.

pH: 5 limits, 13 violations of any kind, 13 effluent exceedances, latest July 31, 2024.
Solids, total suspended: 13 limits, 79 violations of any kind, 11 effluent exceedances, latest May 31, 2023, largest 47% over the limit.
Coliform, fecal MPN + membrane ftl 44.5 C: 4 limits, 3 violations of any kind, 1 effluent exceedance, latest May 31, 2021, largest 72% over the limit.
BOD, carbonaceous [5 day, 20 C]: 13 limits, 68 violations of any kind, 0 effluent exceedances.
Nitrogen, ammonia total [as N]: 2 limits, 12 violations of any kind, 0 effluent exceedances.
Nitrogen, total [as N]: 5 limits, 11 violations of any kind, 0 effluent exceedances.
Nitrogen, Kjeldahl, total [as N]: 5 limits, 11 violations of any kind, 0 effluent exceedances.
Nitrite + Nitrate total [as N]: 5 limits, 11 violations of any kind, 0 effluent exceedances.
Solids, total dissolved: 0 limits, 1 violation of any kind, 0 effluent exceedances.
Flow, in conduit or thru treatment plant: 15 limits, 0 violations of any kind, 0 effluent exceedances.
Phosphorus, total [as P]: 11 limits, 0 violations of any kind, 0 effluent exceedances.
Sulfate, total [as SO4]: 3 limits, 0 violations of any kind, 0 effluent exceedances.
Oxygen, dissolved [DO]: 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.

September 28, 2026: Letter of Violation/ Warning Letter (State).

Minnesota holds 240 Publicly owned treatment works coverages of this permit type in EPA’s file; 221 were issued before MNG585118.

Coverages issued nearest MNG585118

January 1, 2024: TWIN LAKES WWTP, Twin Lakes, MNG585042, held by Twin Lakes city of
January 1, 2024: SHAFER WWTP, Shafer, MNG585047, held by Shafer city of
January 1, 2024: WILLOW RIVER WWTP, Willow River, MNG585054, held by Willow River city of
January 1, 2024: MAPLETON WWTP, Mapleton, MNG585089, held by Mapleton city of
January 1, 2024: LUCAN WWTP, Lucan, MNG585112, held by Lucan city of
January 1, 2024: CLIMAX WWTP, Climax, MNG585169, held by Climax city of
January 1, 2024: BAUDETTE WWTP, Baudette, MNG585174, held by Baudette city of
January 1, 2024: DEER RIVER WWTP, Deer River, MNG585181, held by Deer River city of
January 1, 2024: CURRIE WWTP, Currie, MNG585221, held by Currie city of
January 1, 2024: BERTHA WWTP, Bertha, MNG585371, held by Bertha city of

ALDEN WWTP among its neighbors

EPA’s permit file holds 1 discharge permits in the Foster Creek subwatershed (HUC 070200090502), MNG585118 among them. Its county holds 33, 1 of them major permits; MNG585118 is a minor permit.

Identity

Facility as filed	ALDEN WWTP
Permittee as filed	Alden city of
NPDES ID	MNG585118
Permit status	Effective
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, 2024
Expiration date	November 30, 2028
Issuing agency	STA
Address	Alden, MN 56009
Subwatershed	Foster Creek (HUC 070200090502)
SIC	4952 – Sewerage Systems

Effluent limits and exceedances

14Pollutants on file
13Under a numeric limit
9With a violation of any kind
3With 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
pH	5	13	13	July 31, 2024
Solids, total suspended	13	79	11	May 31, 2023	47% over the limit
Coliform, fecal MPN + membrane ftl 44.5 C	4	3	1	May 31, 2021	72% over the limit
BOD, carbonaceous [5 day, 20 C]	13	68	0
Nitrogen, ammonia total [as N]	2	12	0
Nitrogen, total [as N]	5	11	0
Nitrogen, Kjeldahl, total [as N]	5	11	0
Nitrite + Nitrate total [as N]	5	11	0
Solids, total dissolved	0	1	0
Flow, in conduit or thru treatment plant	15	0	0
Phosphorus, total [as P]	11	0	0
Sulfate, total [as SO4]	3	0	0
Oxygen, dissolved [DO]	2	0	0
Precipitation, total defined period/in	1	0	0

Inspections, violations and enforcement

0Single-event violations

EPA’s single-event violation file, as loaded, holds no violation for NPDES MNG585118.

Inspections

EPA’s inspection file holds no inspection for NPDES MNG585118.

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

Date	What EPA recorded	Agency
September 28, 2026	Letter of Violation/ Warning Letter	State

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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 MNG585118 for ALDEN WWTP in Alden, MN, held by Alden city of, with a permit status of Effective and a Minor Discharger class. The facts list 14 pollutants on file, 13 under a numeric limit, 9 with a violation of any kind, and 3 with an effluent exceedance.