ARMSTRONG WORLD INDUSTRIES, INC.

NPDES permit WV0116661 · Minor NON-POTW · effective, expires 2028-02-27 · 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

8values over a limit
0required values missing, on 0 form(s)
0of 19 forms filed late

Last period with anything received: 2026-07-31. Most often over: Zinc, total recoverable (8).

Reporting

Reports are due about 25 days after each monitoring period ends (read off this permit's own late-day counts in EPA's filings).

Limits in force (66)

OutfallParameterStatisticLimitMonths
001Temperature, water deg. fahrenheitMO AVG report only May
001Temperature, water deg. fahrenheitMO AVG report only Aug
001Temperature, water deg. fahrenheitMO AVG report only Jul
001Temperature, water deg. fahrenheitMO AVG report only Oct
001Temperature, water deg. fahrenheitMO AVG report only Feb
001Temperature, water deg. fahrenheitMO AVG report only Apr
001Temperature, water deg. fahrenheitMO AVG report only Jun
001Temperature, water deg. fahrenheitMO AVG report only Dec
001Temperature, water deg. fahrenheitMO AVG report only Sep
001Temperature, water deg. fahrenheitMO AVG report only Mar
001Temperature, water deg. fahrenheitMO AVG report only Jan
001Temperature, water deg. fahrenheitMO AVG report only Nov
001Temperature, water deg. fahrenheitDAILY MX report only May
001Temperature, water deg. fahrenheitDAILY MX <= 120.8 deg F Aug
001Temperature, water deg. fahrenheitDAILY MX report only Jul
001Temperature, water deg. fahrenheitDAILY MX <= 116.2 deg F Oct
001Temperature, water deg. fahrenheitDAILY MX <= 67.2 deg F Feb
001Temperature, water deg. fahrenheitDAILY MX report only Apr
001Temperature, water deg. fahrenheitDAILY MX report only Jun
001Temperature, water deg. fahrenheitDAILY MX report only Dec
001Temperature, water deg. fahrenheitDAILY MX report only Sep
001Temperature, water deg. fahrenheitDAILY MX report only Mar
001Temperature, water deg. fahrenheitDAILY MX report only Jan
001Temperature, water deg. fahrenheitDAILY MX <= 120.5 deg F Nov
001pHINST MIN >= 6 SU all year
001pHINST MAX <= 9 SU all year
001Nitrogen, nitrite total [as N]MO AVG <= .86 mg/L all year
001Nitrogen, nitrite total [as N]DAILY MX <= 3 mg/L all year
001Nitrogen, nitrate total [as N]MO AVG report only all year
001Nitrogen, nitrate total [as N]DAILY MX report only all year
001Chloride [as Cl]MO AVG <= 1230 mg/L all year
001Chloride [as Cl]DAILY MX <= 2533 mg/L all year
001Fluoride, total [as F]MO AVG report only all year
001Fluoride, total [as F]DAILY MX report only all year
001Iron, total recoverableMO AVG <= .83 mg/L all year
001Iron, total recoverableDAILY MX <= 2.58 mg/L all year
001Zinc, total recoverableMO AVG <= .045 mg/L all year
001Zinc, total recoverableDAILY MX <= .13 mg/L all year
001Aluminum, total recoverableMO AVG <= .4 mg/L all year
001Aluminum, total recoverableDAILY MX <= 1.1 mg/L all year
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 <= .028 mg/L all year
001Chlorine, total residualDAILY MX <= .057 mg/L all year
001Toxicity [acute], Ceriodaphnia dubiaMO AVG report only all year
001Toxicity [acute], Ceriodaphnia dubiaDAILY MX report only all year
001Toxicity [acute], Pimephales promelas [Fathead Minnow]MO AVG report only all year
001Toxicity [acute], Pimephales promelas [Fathead Minnow]DAILY MX report only all year
001SulfateMO AVG report only all year
001SulfateDAILY MX report only all year
002pHINST MIN report only all year
002pHINST MAX report only all year
002Solids, total suspendedMO AVG report only all year
002Solids, total suspendedDAILY MX report only all year
002Magnesium, total [as Mg]MO AVG report only all year
002Magnesium, total [as Mg]DAILY MX report only all year
002Iron, total recoverableMO AVG report only all year
002Iron, total recoverableDAILY MX report only all year
002Aluminum, total recoverableMO AVG report only all year
002Aluminum, total recoverableDAILY MX report only all year
002Manganese, total recoverableMO AVG report only all year
002Manganese, 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

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