Clean Water Act discharge permit · NPDES MNG490112

KOCH INC - QUARRY 3, Le Roy, MN: NPDES MNG490112 discharge permit, effluent exceedances, inspections, penalties

EffectivePermit status
MinorDischarger class
6Pollutants under a numeric limit
0Pollutants with an effluent exceedance

KOCH INC - QUARRY 3, held by Tim and Lynda Koch Trust, holds NPDES permit MNG490112. EPA’s file records it issued September 1, 2022 and expiring May 31, 2027. 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 KOCH INC - QUARRY 3: its NPDES ID, its permit type and status, its dates, its address in Le Roy, Minnesota, and 6 pollutants under a numeric limit. EPA’s effluent violation file and its single-event violation file hold no violation for NPDES MNG490112.

Identity

Facility as filed	KOCH INC - QUARRY 3
Permittee as filed	Tim and Lynda Koch Trust
NPDES ID	MNG490112
Permit status	Effective
Permit type	Coverage under a general permit
Discharger class	Minor discharger
Facility type	Not a publicly owned treatment works
Issued	September 1, 2022
Expiration date	May 31, 2027
Issuing agency	STA
Address	Le Roy, MN 55951
Subwatershed	City of Le Roy-Upper Iowa River (HUC 070600020106)
SIC	1422 – Crushed And Broken Limestone

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

6Pollutants on file
6Under 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
pH	4	0	0
Flow, in conduit or thru treatment plant	4	0	0
Solids, total suspended	3	0	0
Nitrogen, Kjeldahl, total [as N]	2	0	0
Nitrite + Nitrate total [as N]	2	0	0
Phosphorus, total [as P]	2	0	0

EPA’s effluent violation file records no exceedance of a numeric limit for NPDES MNG490112.

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 MNG490112.

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 MNG490112 there.

Nearby on the register

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

This public-records page covers NPDES permit MNG490112, held by the Tim and Lynda Koch Trust for KOCH INC - QUARRY 3 in Le Roy, MN, with a status of Effective and a Minor discharger class. The page lists 6 pollutants under a numeric limit, 0 pollutants with an effluent exceedance, and an issue date of September 1, 2022 with an expiration date of May 31, 2027, within the City of Le Roy-Upper Iowa River subwatershed (HUC 070600020106).