Clean Water Act discharge permit · NPDES MIG250149

NILES PRECISION CO, Niles, MI: NPDES MIG250149 discharge permit, effluent exceedances, inspections, penalties

Administratively continuedPermit status
MinorDischarger class
3Pollutants under a numeric limit
0Pollutants with an effluent exceedance

NILES PRECISION CO, held by Niles Precision Company, holds NPDES permit MIG250149, which discharges to St. Joseph River. EPA’s file records it issued September 30, 2019 and expiring April 1, 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	NILES PRECISION CO
Permittee as filed	Niles Precision Company
NPDES ID	MIG250149
Permit status	Administratively continued (past its expiration date and still in force until reissued)
Permit type	Coverage under a general permit
Discharger class	Minor discharger
Facility type	Not a publicly owned treatment works
Issued	September 30, 2019
Expiration date	April 1, 2023
Issuing agency	State
Address	Niles, MI 49120
Receiving water	St. Joseph River
Subwatershed	City of Niles-Saint Joseph River (HUC 040500012210)
NAICS	336412 – Aircraft Engine and Engine Parts Manufacturing
SIC	3724 – Aircraft Engines And Engine Parts
Other EPA IDs (FRS)	RCRA handler MID052867405

Cited to the EPA ICIS-NPDES permit file (ECHO download) and EPA’s NAICS/SIC and component files, the same download; cross-program IDs from EPA’s FRS facility-registry crosswalk.

Effluent limits and exceedances

3Pollutants on file
3Under a numeric limit
3With 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
Temperature, water deg. fahrenheit	2	2
Flow, in conduit or thru treatment plant	2	2
Outfall observation,visual, y/n response	1	1

EPA’s effluent violation file records no exceedance of a numeric limit for NPDES MIG250149.

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

2Single-event violations

Date	What EPA recorded	Agency
November 21, 2023	Reporting Violations - Late Submittal of DMRs	ST6
August 21, 2023	Reporting Violations - Late Submittal of DMRs	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.

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 MIG250149 there.

Nearby on the register

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

This public-records page covers NPDES permit MIG250149, held by Niles Precision Company for its facility in Niles, MI, which discharges to the St. Joseph River within the City of Niles-Saint Joseph River subwatershed (HUC 040500012210). The permit shows an administratively continued status, a Minor Discharger class of 3, 0 pollutants under a numeric limit, and 0 pollutants with an effluent exceedance.