Clean Water Act discharge permit · NPDES MN0022659

ATWATER WWTP, Atwater, MN: NPDES MN0022659 discharge permit, effluent exceedances, inspections, penalties

Administratively continuedPermit status
MinorDischarger class
15Pollutants under a numeric limit
1Pollutants with an effluent exceedance

ATWATER WWTP, held by Atwater city of, holds NPDES permit MN0022659. EPA’s file records it issued October 1, 2020 and expiring December 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.

Identity

Facility as filed	ATWATER WWTP
Permittee as filed	Atwater city of
NPDES ID	MN0022659
Permit status	Administratively continued (past its expiration date and still in force until reissued)
Permit type	Individual permit
Discharger class	Minor discharger
Facility type	Publicly owned treatment works
Program	Publicly owned treatment works
Issued	October 1, 2020
Expiration date	December 31, 2023
Issuing agency	STA
Address	Atwater, MN 56209
Receiving water impaired	303(D) Listed
Subwatershed	County Ditch No 47 (HUC 070102040209)
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

15Pollutants on file
15Under a numeric limit
1With a violation of any kind
1With 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	6	2	2	April 30, 1991	122% over the limit
Flow, in conduit or thru treatment plant	9	0	0
Phosphorus, total [as P]	6	0	0
BOD, carbonaceous [5 day, 20 C]	5	0	0
pH	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
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
Mercury, dissolved [as Hg]	1	0	0
Mercury, total [as Hg]	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

1Single-event violations

Date	What EPA recorded	Agency
January 19, 2024	Permit Violations - Failure to Submit Timely Permit Renewal Application	ST6

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 MN0022659 there.

Nearby on the register

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

This public-records page covers Clean Water Act discharge permit NPDES MN0022659 for ATWATER WWTP in Atwater, MN, held by Atwater city of and classed as a Minor discharger, with an administratively continued status. The figures listed are 15 pollutants on file, 15 under a numeric limit, and 1 pollutant with an effluent exceedance.