GAF BUILDING MATERIALS MANUF. CORP

NPDES permit IN0051667 · Minor NON-POTW · effective, expires 2026-10-31 · EPA's file as of 2026-09-19

Check this month's numbers before you file
Watch this permit — $79 a month. Every Monday, from EPA's newest files: the next report due and when, whether EPA's file holds your last one, any change to this permit's limits or status, and the renewal date.

EPA's record, 2025-09-01 to 2026-08-31

1values over a limit
1required values missing, on 1 form(s)
1of 30 forms filed late

Last period with anything received: 2026-07-31. Most often over: Toxicity [chronic], Pimephales promelas [Fathead Minnow] (1).

Reporting

Reports are due about 29 days after each monitoring period ends (read off this permit's own late-day counts in EPA's filings).

Limits in force (84)

OutfallParameterStatisticLimitMonths
001Temperature, water deg. fahrenheitMO AVG report only all year
001Temperature, water deg. fahrenheitDAILY MX report only all year
001Oxygen, dissolved [DO]DAILY MN report only all year
001pHDAILY MN >= 6 SU all year
001pHDAILY MX <= 9 SU all year
001pHDAILY MX report only Jun, Dec
001pHDAILY MX report only Jun, Dec
001Solids, total suspendedMO AVG <= 20 mg/L all year
001Solids, total suspendedDAILY MX <= 30 mg/L all year
001Solids, total suspendedDAILY MX report only Jun, Dec
001Solids, total suspendedDAILY MX report only Jun, Dec
001Oil and grease, hexane extr methodMO AVG <= 10 mg/L all year
001Oil and grease, hexane extr methodDAILY MX <= 15 mg/L all year
001Oil and grease, hexane extr methodDAILY MX report only Jun, Dec
001Oil and grease, hexane extr methodDAILY MX report only Jun, Dec
001Phosphorus, total [as P]MO AVG report only all year
001Phosphorus, total [as P]DAILY MX report only all year
001Zinc, total recoverableDAILY MX report only Jun, Dec
001Zinc, total recoverableDAILY MX report only Jun, Dec
001Copper, total recoverableMO AVG report only all year
001Copper, total recoverableDAILY MX report only all year
001Flow, in conduit or thru treatment plantMO AVG report only all year
001Flow, in conduit or thru treatment plantDAILY MX report only all year
001Chlorine, total residualMO AVG < .06 mg/L all year
001Chlorine, total residualDAILY MX < .06 mg/L all year
001BOD, carbonaceous [5 day, 20 C]DAILY MX report only Jun, Dec
001BOD, carbonaceous [5 day, 20 C]DAILY MX report only Jun, Dec
001Storm water flowDAILY MX report only Jun, Dec
001Storm water flowDAILY MX report only Jun, Dec
001Flow, totalMO TOTAL report only all year
002Temperature, water deg. fahrenheitMO AV MN report only all year
002Temperature, water deg. fahrenheitDAILY MX report only all year
002Oxygen, dissolved [DO]DAILY MN report only all year
002pHDAILY MN >= 6 SU all year
002pHDAILY MX <= 9 SU all year
002pHDAILY MX report only Jun, Dec
002pHDAILY MX report only Jun, Dec
002Solids, total suspendedMO AVG <= 20 mg/L all year
002Solids, total suspendedDAILY MX <= 30 mg/L all year
002Solids, total suspendedDAILY MX report only Jun, Dec
002Solids, total suspendedDAILY MX report only Jun, Dec
002Oil and grease, hexane extr methodMO AVG <= 10 mg/L all year
002Oil and grease, hexane extr methodDAILY MX <= 15 mg/L all year
002Oil and grease, hexane extr methodDAILY MX report only Jun, Dec
002Oil and grease, hexane extr methodDAILY MX report only Jun, Dec
002Phosphorus, total [as P]MO AVG report only all year
002Phosphorus, total [as P]DAILY MX report only all year
002Zinc, total recoverableDAILY MX report only Jun, Dec
002Zinc, total recoverableDAILY MX report only Jun, Dec
002Copper, total recoverableMO AVG report only all year
002Copper, total recoverableDAILY MX report only all year
002Flow, in conduit or thru treatment plantMO AVG report only all year
002Flow, in conduit or thru treatment plantDAILY MX report only all year
002Chlorine, total residualMO AVG < .06 mg/L all year
002Chlorine, total residualDAILY MX < .06 mg/L all year
002BOD, carbonaceous [5 day, 20 C]DAILY MX report only Jun, Dec
002BOD, carbonaceous [5 day, 20 C]DAILY MX report only Jun, Dec
002Storm water flowDAILY MX report only Jun, Dec
002Storm water flowDAILY MX report only Jun, Dec
002Flow, totalMO TOTAL report only all year
003pHDAILY MX report only Jun, Dec
003pHDAILY MX report only Jun, Dec
003Solids, total suspendedDAILY MX report only Jun, Dec
003Solids, total suspendedDAILY MX report only Jun, Dec
003Oil and grease, hexane extr methodDAILY MX report only Jun, Dec
003Oil and grease, hexane extr methodDAILY MX report only Jun, Dec
003Zinc, total recoverableDAILY MX report only Jun, Dec
003Zinc, total recoverableDAILY MX report only Jun, Dec
003BOD, carbonaceous [5 day, 20 C]DAILY MX report only Jun, Dec
003BOD, carbonaceous [5 day, 20 C]DAILY MX report only Jun, Dec
003Storm water flowDAILY MX report only Jun, Dec
003Storm water flowDAILY MX report only Jun, Dec
100Toxicity [acute], Ceriodaphnia dubiaMAXIMUM <= 1 tox acute Oct
100Toxicity [acute], Ceriodaphnia dubiaMAXIMUM <= 1 tox acute Nov
100Toxicity [acute], Ceriodaphnia dubiaMAXIMUM <= 1 tox acute Nov
100Toxicity [chronic], Ceriodaphnia dubiaMAXIMUM <= 1 tox chronic Oct
100Toxicity [chronic], Ceriodaphnia dubiaMAXIMUM <= 1 tox chronic Nov
100Toxicity [chronic], Ceriodaphnia dubiaMAXIMUM <= 1 tox chronic Nov
100Toxicity [acute], Pimephales promelas [Fathead Minnow]MAXIMUM <= 1 tox acute Oct
100Toxicity [acute], Pimephales promelas [Fathead Minnow]MAXIMUM <= 1 tox acute Nov
100Toxicity [acute], Pimephales promelas [Fathead Minnow]MAXIMUM <= 1 tox acute Nov
100Toxicity [chronic], Pimephales promelas [Fathead Minnow]MAXIMUM <= 1 tox chronic Oct
100Toxicity [chronic], Pimephales promelas [Fathead Minnow]MAXIMUM <= 1 tox chronic Nov
100Toxicity [chronic], Pimephales promelas [Fathead Minnow]MAXIMUM <= 1 tox chronic Nov

Built from EPA's ECHO bulk files. EPA's file, not the permit document, is the source: read your permit. Check a report before you file it · All states