Clean Water Act discharge permit · NPDES IN0051667

GAF BLDG MATERIALS MFG CORP, Mount Vernon, IN: NPDES IN0051667 discharge permit, effluent exceedances, inspections, penalties

Administratively continuedPermit status
MinorDischarger class
17Pollutants under a numeric limit
5Pollutants with an effluent exceedance

GAF BLDG MATERIALS MFG CORP, held by GAF BUILDING MATERIALS MANUF. CORP, holds NPDES permit IN0051667, which discharges to Ohio R Via Mill Cr Via Culvert. EPA’s file records it issued September 23, 2016 and expiring October 31, 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	GAF BLDG MATERIALS MFG CORP
Permittee as filed	GAF BUILDING MATERIALS MANUF. CORP
NPDES ID	IN0051667
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	September 23, 2016
Expiration date	October 31, 2021
Issuing agency	IDEM
Address	Mount Vernon, IN 47620
Receiving water	OHIO R VIA MILL CR VIA CULVERT
Subwatershed	Indian Creek-Big Creek (HUC 051201130709)
SIC	2952 – Asphalt Felts And Coatings
Other EPA IDs (FRS)	RCRA handler IND057593824; ICIS-AIR source IN0000001812900011

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

18Pollutants on file
17Under a numeric limit
9With a violation of any kind
5With 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	16	51	51	June 30, 2024	340% over the limit
Chlorine, total residual	4	23	23	October 31, 2022	1,300% over the limit
pH	16	18	16	January 31, 2018
Toxicity [chronic], Ceriodaphnia dubia	2	3	2	October 31, 2020	1,563% over the limit
Toxicity [chronic], Pimephales promelas [Fathead Minnow]	2	3	2	October 31, 2025	4,023% over the limit
Naphthalene	0	2	0
Oil and grease, hexane extr method	16	1	0
Toxicity [acute], Ceriodaphnia dubia	2	1	0
Toxicity [acute], Pimephales promelas [Fathead Minnow]	2	1	0
Zinc, total recoverable	12	0	0
BOD, carbonaceous [5 day, 20 C]	12	0	0
Storm water flow	12	0	0
Temperature, water deg. fahrenheit	4	0	0
Phosphorus, total [as P]	4	0	0
Copper, total recoverable	4	0	0
Flow, in conduit or thru treatment plant	4	0	0
Oxygen, dissolved [DO]	2	0	0
Flow, total	2	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 IN0051667.

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 IN0051667 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 IN0051667, held by GAF BLDG MATERIALS MFG CORP in Mount Vernon, IN, which is administratively continued and classed as a Minor Discharger. The page lists 5 pollutants under a numeric limit and 5 pollutants with an effluent exceedance, with the permit issued September 23, 2016 and expiring October 31, 2021.