Clean Water Act discharge permit · NPDES MN0023701

HINCKLEY WWTP, Hinckley, MN: NPDES MN0023701 discharge permit, effluent exceedances, inspections, penalties

EffectivePermit status
MinorDischarger class
17Pollutants under a numeric limit
7Pollutants with an effluent exceedance

HINCKLEY WWTP, held by Hinckley city of, holds NPDES permit MN0023701. EPA’s file records it issued February 1, 2024 and expiring January 31, 2029. 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.

Identity

Facility as filed	HINCKLEY WWTP
Permittee as filed	Hinckley city of
NPDES ID	MN0023701
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, 2024
Expiration date	January 31, 2029
Issuing agency	STA
Address	Hinckley, MN 55037
Subwatershed	Grindstone River (HUC 070300030503)
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

17Pollutants on file
17Under a numeric limit
8With a violation of any kind
7With 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
Oxygen, dissolved [DO]	1	12	9	September 30, 2024	120% over the limit
BOD, carbonaceous [5 day, 20 C]	6	22	5	July 31, 2025	67% over the limit
Solids, total suspended	7	19	2	May 31, 1992	94% over the limit
Coliform, fecal MPN + membrane ftl 44.5 C	1	7	2	October 31, 2021	99% over the limit
Nitrogen, ammonia total [as N]	4	6	2	July 31, 2021	73% over the limit
Phosphorus, total [as P]	6	2	2	May 31, 2020	50% over the limit
pH	4	7	1	May 31, 1991
Flow, in conduit or thru treatment plant	3	14	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
Solids, total dissolved	1	0	0
Mercury, dissolved [as Hg]	1	0	0
Mercury, total [as Hg]	1	0	0
BOD, carb-5 day, 20 deg C, percent removal	1	0	0
Solids, suspended percent removal	1	0	0

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 MN0023701.

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 MN0023701 there.

Nearby on the register

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

This public-records page covers the NPDES MN0023701 discharge permit held by Hinckley city of for the HINCKLEY WWTP in Hinckley, MN, with the permit status listed as Effective and the discharger class as Minor. The facts list 17 pollutants on file, 17 under a numeric limit, 8 with a violation of any kind, and 7 with an effluent exceedance, with the permit issued February 1, 2024 and expiring January 31, 2029.