LYDALL INTERFACE MATERIALS [US] NC

NPDES permit NY0006491 · Minor NON-POTW · effective, expires 2030-06-30 · 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.

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

0values over a limit
0required values missing, on 0 form(s)
3of 43 forms filed late

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

Reporting

Reports are due about 28 days after each monitoring period ends (read off this permit's own late-day counts in EPA's filings).

Limits in force (76)

OutfallParameterStatisticLimitMonths
002Temperature, water deg. fahrenheitDAILY AV <= 75 deg F all year
002Temperature, water deg. fahrenheitDAILY MX <= 84 deg F all year
002BOD, 5-day, 20 deg. CDAILY AV report only all year
002BOD, 5-day, 20 deg. CDAILY MX report only all year
002BOD, 5-day, 20 deg. CDAILY AV <= 310 lb/d all year
002BOD, 5-day, 20 deg. CDAILY MX <= 570 lb/d all year
002pHMINIMUM >= 6 SU all year
002pHMAXIMUM <= 8.5 SU all year
002Solids, total suspendedDAILY AV report only all year
002Solids, total suspendedDAILY MX report only all year
002Solids, total suspendedDAILY AV <= 250 lb/d all year
002Solids, total suspendedDAILY MX <= 510 lb/d all year
002Solids, settleableDAILY AV report only all year
002Solids, settleableDAILY MX <= .3 mL/L all year
002Sulfite [as SO3]DAILY AV report only all year
002Sulfite [as SO3]DAILY MX report only all year
002Sulfite [as SO3]DAILY AV report only all year
002Sulfite [as SO3]DAILY MX report only all year
002Sulfate, total [as SO4]DAILY AV report only all year
002Sulfate, total [as SO4]DAILY MX report only all year
002Sulfate, total [as SO4]DAILY AV report only all year
002Sulfate, total [as SO4]DAILY MX report only all year
002Zinc, total [as Zn]DAILY MX report only (alert) all year
002Zinc, total [as Zn]DAILY MX <= 3.5 lb/d (alert) all year
002Antimony, total [as Sb]DAILY MX report only (alert) all year
002Antimony, total [as Sb]DAILY MX <= 1 lb/d (alert) all year
002Aluminum, total [as Al]DAILY MX report only (alert) all year
002Aluminum, total [as Al]DAILY MX <= 7 lb/d (alert) all year
002Phenolics, total recoverableDAILY MX report only (alert) all year
002Phenolics, total recoverableDAILY MX <= .3 lb/d (alert) all year
002AcrylonitrileDAILY AV report only all year
002AcrylonitrileDAILY 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
002Solids, total dissolvedDAILY AV report only all year
002Solids, total dissolvedDAILY MX report only all year
002Solids, total dissolvedDAILY AV report only all year
002Solids, total dissolvedDAILY MX report only all year
004Temperature, water deg. fahrenheitDAILY AV <= 75 deg F all year
004Temperature, water deg. fahrenheitDAILY MX <= 84 deg F all year
004BOD, 5-day, 20 deg. CDAILY AV report only all year
004BOD, 5-day, 20 deg. CDAILY MX report only all year
004BOD, 5-day, 20 deg. CDAILY AV <= 310 lb/d all year
004BOD, 5-day, 20 deg. CDAILY MX <= 570 lb/d all year
004pHMINIMUM >= 6 SU all year
004pHMAXIMUM <= 8.5 SU all year
004Solids, total suspendedDAILY AV report only all year
004Solids, total suspendedDAILY MX report only all year
004Solids, total suspendedDAILY AV <= 250 lb/d all year
004Solids, total suspendedDAILY MX <= 510 lb/d all year
004Solids, settleableDAILY AV report only all year
004Solids, settleableDAILY MX <= .3 mL/L all year
004Sulfite [as SO3]DAILY AV report only all year
004Sulfite [as SO3]DAILY MX report only all year
004Sulfite [as SO3]DAILY AV report only all year
004Sulfite [as SO3]DAILY MX report only all year
004Sulfate, total [as SO4]DAILY AV report only all year
004Sulfate, total [as SO4]DAILY MX report only all year
004Sulfate, total [as SO4]DAILY AV report only all year
004Sulfate, total [as SO4]DAILY MX report only all year
004Zinc, total [as Zn]DAILY MX report only (alert) all year
004Zinc, total [as Zn]DAILY MX <= 3.5 lb/d (alert) all year
004Antimony, total [as Sb]DAILY MX report only (alert) all year
004Antimony, total [as Sb]DAILY MX <= 1 lb/d (alert) all year
004Aluminum, total [as Al]DAILY MX report only (alert) all year
004Aluminum, total [as Al]DAILY MX <= 7 lb/d (alert) all year
004Phenolics, total recoverableDAILY MX report only (alert) all year
004Phenolics, total recoverableDAILY MX <= .3 lb/d (alert) all year
004AcrylonitrileDAILY AV report only all year
004AcrylonitrileDAILY MX report only all year
004Flow, in conduit or thru treatment plantDAILY AV report only all year
004Flow, in conduit or thru treatment plantDAILY MX report only all year
004Solids, total dissolvedDAILY AV report only all year
004Solids, total dissolvedDAILY MX report only all year
004Solids, total dissolvedDAILY AV report only all year
004Solids, total dissolvedDAILY MX report only 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