Clean Water Act discharge permit · NPDES MN0025691

GRASSTON WWTP, Grasston, MN: NPDES MN0025691 discharge permit, effluent exceedances, inspections, penalties

EffectivePermit status
MinorDischarger class
11Pollutants under a numeric limit
0Pollutants with an effluent exceedance

GRASSTON WWTP, held by Grasston city of, holds NPDES permit MN0025691. EPA’s file records it issued August 1, 2019 and expiring August 31, 2023. 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.

What the register holds for GRASSTON WWTP: its NPDES ID, its permit type and status, its dates, its address in Grasston, Minnesota, and 11 pollutants under a numeric limit. EPA’s effluent violation file and its single-event violation file hold no violation for NPDES MN0025691.

Identity

Facility as filed	GRASSTON WWTP
Permittee as filed	Grasston city of
NPDES ID	MN0025691
Permit status	Effective
Permit type	Individual permit
Discharger class	Minor discharger
Facility type	Publicly owned treatment works
Program	Publicly owned treatment works
Issued	August 1, 2019
Expiration date	August 31, 2023
Issuing agency	STA
Address	Grasston, MN 55030
Subwatershed	Mud Creek (HUC 070300040603)
SIC	4952 – Sewerage Systems

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

11Pollutants on file
11Under 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
Flow, in conduit or thru treatment plant	9	0	0
Solids, total suspended	5	0	0
BOD, carbonaceous [5 day, 20 C]	5	0	0
pH	3	0	0
Phosphorus, total [as P]	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
Coliform, fecal MPN + membrane ftl 44.5 C	1	0	0

EPA’s effluent violation file records no exceedance of a numeric limit for NPDES MN0025691.

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 MN0025691.

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

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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 MN0025691 there.

Nearby on the register

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

This public-records page covers NPDES permit MN0025691 for the GRASSTON WWTP in Grasston, Minnesota, held by Grasston city of, with an effective status, issued August 1, 2019 and expiring August 31, 2023. The page lists 11 pollutants under a numeric limit and 0 pollutants with an effluent exceedance, with a minor discharger class.