GAF Materials Corporation

NPDES permit GA0003841 · Minor NON-POTW · administratively continued, expires 2023-09-30 · 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.

This permit expired on 2023-09-30 and is administratively continued: its last limits keep applying until a new permit is issued, and EPA still expects the reports.

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

0values over a limit
0required values missing, on 0 form(s)
8of 44 forms filed late

Last period with anything received: 2026-07-31.

Reporting

Reports are due about 15 days after each monitoring period ends (read off this permit's own late-day counts in EPA's filings).

Limits in force (44)

OutfallParameterStatisticLimitMonths
001ConductivityDAILY AV report only all year
001ConductivityDAILY MX report only all year
001BOD, 5-day, 20 deg. CDAILY AV report only all year
001BOD, 5-day, 20 deg. CDAILY MX report only all year
001pHMINIMUM >= 6 SU all year
001pHMAXIMUM <= 9 SU all year
001Oil & GreaseDAILY AV <= 10 mg/L all year
001Oil & GreaseDAILY MX <= 15 mg/L all year
001Phosphorus, total [as P]DAILY AV report only all year
001Phosphorus, total [as P]DAILY MX report only all year
001Phosphate, ortho [as P]DAILY AV report only all year
001Phosphate, ortho [as P]DAILY MX report only all year
001Flow, in conduit or thru treatment plantDAILY AV report only all year
001Flow, in conduit or thru treatment plantDAILY MX report only all year
001Chlorine, total residualDAILY MX <= .5 mg/L all year
002BOD, 5-day, 20 deg. CDAILY AV report only all year
002BOD, 5-day, 20 deg. CDAILY MX report only all year
002pHMINIMUM >= 6 SU all year
002pHMAXIMUM <= 9 SU all year
002Oil & GreaseDAILY AV <= 10 mg/L all year
002Oil & GreaseDAILY MX <= 15 mg/L all year
002Phosphorus, total [as P]DAILY AV report only all year
002Phosphorus, total [as P]DAILY MX report only all year
002Phosphate, ortho [as P]DAILY AV report only all year
002Phosphate, ortho [as P]DAILY MX report only all year
002Flow, in conduit or thru treatment plantDAILY AV report only all year
002Flow, in conduit or thru treatment plantDAILY MX report only all year
002Chlorine, total residualDAILY MX <= .5 mg/L all year
002Chemical oxygen demand [COD]DAILY AV report only all year
002Chemical oxygen demand [COD]DAILY MX report only all year
005ConductivityDAILY AV report only all year
005ConductivityDAILY MX report only all year
005BOD, 5-day, 20 deg. CDAILY AV report only all year
005BOD, 5-day, 20 deg. CDAILY MX report only all year
005pHMINIMUM >= 6 SU all year
005pHMAXIMUM <= 9 SU all year
005Phosphorus, total [as P]DAILY AV report only all year
005Phosphorus, total [as P]DAILY MX report only all year
005Phosphate, ortho [as P]DAILY AV report only all year
005Phosphate, ortho [as P]DAILY MX report only all year
005Flow, in conduit or thru treatment plantDAILY AV report only all year
005Flow, in conduit or thru treatment plantDAILY MX report only all year
SUMSolids, total suspendedDAILY AV <= 51 lb/d all year
SUMSolids, total suspendedDAILY MX <= 75 lb/d all year

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