Clean Water Act discharge permit · NPDES MNG585109

DELAVAN WWTP, Delavan, MN: NPDES MNG585109 discharge permit, effluent exceedances, inspections, penalties

Administratively continuedPermit status
MinorDischarger class
11Pollutants under a numeric limit
4Pollutants with an effluent exceedance
0Inspections on file
0Formal enforcement actions

DELAVAN WWTP, held by Delavan city of, holds NPDES permit MNG585109. EPA’s file records it issued January 1, 2020 and expiring November 30, 2023.

DELAVAN WWTP, Delavan, Minnesota: Coverage under a general permit MNG585109, held by Delavan city of; Publicly owned treatment works; Administratively continued (past its expiration date and still in force until reissued); issued January 1, 2020, term to November 30, 2023, by STA.

Solids, total suspended: 5 limits, 6 violations of any kind, 6 effluent exceedances, latest November 30, 2022, largest 122% over the limit.
BOD, carbonaceous [5 day, 20 C]: 5 limits, 4 violations of any kind, 4 effluent exceedances, latest November 30, 2020, largest 72% over the limit.
pH: 3 limits, 3 violations of any kind, 3 effluent exceedances, latest July 31, 2024.
Coliform, fecal MPN + membrane ftl 44.5 C: 1 limit, 1 violation of any kind, 1 effluent exceedance, latest October 31, 2019, largest 14% over the limit.
Flow, in conduit or thru treatment plant: 9 limits, 0 violations of any kind, 0 effluent exceedances.
Phosphorus, total [as P]: 4 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.

April 22, 2021: Effluent Violations - Unapproved Bypass (ST6).
April 22, 2021: Management Practice Violations - Best Management Practice Deficiencies (ST6).

Minnesota holds 240 Publicly owned treatment works coverages of this permit type in EPA’s file; 13 were issued before MNG585109.

Coverages issued nearest MNG585109

January 1, 2020: ADA WWTP, Ada, MNG585095, held by Ada city of
January 1, 2020: KIESTER WWTP, Kiester, MNG585097, held by Kiester city of
January 1, 2020: CLEARBROOK WWTP, Clearbrook, MNG585098, held by Clearbrook city of
January 1, 2020: HARTLAND WWTP, Hartland, MNG585102, held by Hartland city of
January 1, 2020: RUTHTON WWTP, Ruthton, MNG585105, held by Ruthton city of
January 1, 2020: TYLER WWTP, Tyler, MNG585116, held by Tyler city of
January 1, 2020: DANVERS WWTP, Danvers, MNG585119, held by Danvers city of
January 1, 2020: FROST WWTP, Frost, MNG585120, held by Frost city of
January 1, 2020: GHENT WWTP, Ghent, MNG585121, held by Ghent city of
January 1, 2020: LOWRY WWTP, Lowry, MNG585123, held by Lowry city of

DELAVAN WWTP among its neighbors

EPA’s permit file holds 1 discharge permits in the Lower Rice Creek subwatershed (HUC 070200110403), MNG585109 among them. Its county holds 20, 1 of them major permits; MNG585109 is a minor permit.

Identity

Facility as filed	DELAVAN WWTP
Permittee as filed	Delavan city of
NPDES ID	MNG585109
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, 2020
Expiration date	November 30, 2023
Issuing agency	STA
Address	Delavan, MN 56023
Subwatershed	Lower Rice Creek (HUC 070200110403)
SIC	4952 – Sewerage Systems

Effluent limits and exceedances

11Pollutants on file
11Under a numeric limit
4With a violation of any kind
4With 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	6	6	November 30, 2022	122% over the limit
BOD, carbonaceous [5 day, 20 C]	5	4	4	November 30, 2020	72% over the limit
pH	3	3	3	July 31, 2024
Coliform, fecal MPN + membrane ftl 44.5 C	1	1	1	October 31, 2019	14% over the limit
Flow, in conduit or thru treatment plant	9	0	0
Phosphorus, total [as P]	4	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

Inspections, violations and enforcement

2Single-event violations

Date	What EPA recorded	Agency
April 22, 2021	Effluent Violations - Unapproved Bypass	ST6
April 22, 2021	Management Practice Violations - Best Management Practice Deficiencies	ST6

Inspections

EPA’s inspection file holds no inspection for NPDES MNG585109.

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 MNG585109.

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

This public-records page covers the NPDES MNG585109 discharge permit for the DELAVAN WWTP, a publicly owned treatment works in Delavan, MN, held by Delavan city of, with its status listed as administratively continued. The facts list 11 pollutants on file, 4 of which are under a numeric limit and 4 of which show an effluent exceedance, within the Lower Rice Creek (HUC 070200110403) subwatershed.