Clean Water Act discharge permit · NPDES PA0242250

ALLEGHENY MINERAL 24 MINE, Slippery Rock, PA: NPDES PA0242250 discharge permit, effluent exceedances, inspections, penalties

Administratively continuedPermit status
MinorDischarger class
9Pollutants under a numeric limit
2Pollutants with an effluent exceedance

ALLEGHENY MINERAL 24 MINE, held by ALLEGHENY MINERAL CORP, holds NPDES permit PA0242250, which discharges to Unt To Slippery Rock Creek. EPA’s file records it issued January 20, 2021 and expiring December 15, 2021. 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	ALLEGHENY MINERAL 24 MINE
Permittee as filed	ALLEGHENY MINERAL CORP
NPDES ID	PA0242250
Permit status	Administratively continued (past its expiration date and still in force until reissued)
Permit type	Individual permit
Discharger class	Minor discharger
Facility type	Not a publicly owned treatment works
Issued	January 20, 2021
Expiration date	December 15, 2021
Issuing agency	State Environmental Organization
Address	Slippery Rock, PA 16057
Receiving water	UNT To Slippery Rock Creek
Subwatershed	Hogue Run-Slippery Rock Creek (HUC 050301050305)

Cited to the EPA ICIS-NPDES permit file (ECHO download).

Effluent limits and exceedances

10Pollutants on file
9Under a numeric limit
10With a violation of any kind
2With 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	0	36	2	March 31, 2022	2,147,483,650% over the limit
Solids, total suspended	21	22	1	November 30, 2022	57% over the limit
pH	34	34	0
Iron, total [as Fe]	26	26	0
Manganese, total [as Mn]	21	21	0
Alkalinity, total [as CaCO3]	17	17	0
Acidity, total [as CaCO3]	17	17	0
Alkalinity - Acidity [as CaCO3]	17	17	0
Osmotic pressure, total, unf whl wtr	7	7	0
Solids, settleable	5	5	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 PA0242250.

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 PA0242250 there.

Nearby on the register

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

This public-records page covers Clean Water Act NPDES permit PA0242250 for ALLEGHENY MINERAL 24 MINE in Slippery Rock, PA, held by ALLEGHENY MINERAL CORP, with its permit status listed as administratively continued. The facts list 9 for discharger class, 2 pollutants under a numeric limit, 2 pollutants with an effluent exceedance, and 10 pollutants in the effluent limits and exceedances section, with the subwatershed given as HUC 050301050305.