Clean Water Act discharge permit · NPDES MN0021946

HAMPTON WWTP, Hampton, MN: NPDES MN0021946 discharge permit, effluent exceedances, inspections, penalties

EffectivePermit status
MinorDischarger class
14Pollutants under a numeric limit
0Pollutants with an effluent exceedance

HAMPTON WWTP, held by Hampton city of, holds NPDES permit MN0021946. EPA’s file records it issued February 1, 2023 and expiring January 31, 2028. 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 HAMPTON WWTP: its NPDES ID, its permit type and status, its dates, its address in Hampton, Minnesota, and 14 pollutants under a numeric limit. EPA’s effluent violation file and its single-event violation file hold no violation for NPDES MN0021946.

Identity

Facility as filed	HAMPTON WWTP
Permittee as filed	Hampton city of
NPDES ID	MN0021946
Permit status	Effective
Permit type	Individual permit
Discharger class	Minor discharger
Facility type	Publicly owned treatment works
Program	Publicly owned treatment works
Issued	February 1, 2023
Expiration date	January 31, 2028
Issuing agency	STA
Address	Hampton, MN 55031
Subwatershed	South Branch Vermillion River (HUC 070400010205)
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

14Pollutants on file
14Under 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
Solids, total volatile	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

EPA’s effluent violation file records no exceedance of a numeric limit for NPDES MN0021946.

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 MN0021946.

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.

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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 MN0021946 there.

Nearby on the register

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

This public-records page covers NPDES permit MN0021946 for the HAMPTON WWTP in Hampton, MN, held by Hampton city of, with an effective status, a Minor Discharger class, and an issuance date of February 1, 2023 and expiration date of January 31, 2028. The register lists 14 pollutants under a numeric limit and 0 pollutants with an effluent exceedance for this permit, and the status and dates reflect EPA's permit file as loaded on October 14, 2026.