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Armstrong World Ind Inc

Manufacturing Industries, Marietta, Pennsylvania. NPDES permit PA0008761, in force until Feb 28, 2031. Last 12 months: over a limit 2 times (last April 2026), 24 required values missing. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 28 days after each period: outfall 001 form A monthly (24 values), outfall 001 form Q quarterly, outfall 004 form S twice a year, outfall 005 form S twice a year, outfall 006 form S twice a year, outfall 007 form S twice a year
Last report on file
June 2026
Oct 2024 – Sep 2025
2 values over a limit, 0 required values missing, 0 of 20 reports late

Last 12 months (Oct 1, 2025 – Sep 30, 2026)

Period endingParameterReportedLimitOver by
April 2026BOD, carbonaceous [5 day, 20 C], daily maximum240 mg/L≤ 160 mg/L50%
April 2026BOD, carbonaceous [5 day, 20 C], monthly average208 mg/L≤ 80 mg/L160%

Limits in force (48)

ParameterStatisticLimitMonthsOutfall
pHinstantaneous minimum≥ 6 SUall year001
pHinstantaneous maximum≤ 9 SUall year001
Solids, total suspendedmonthly average≤ 80 mg/Lall year001
Solids, total suspendeddaily maximum≤ 160 mg/Lall year001
Solids, total suspendedmonthly averagereport only (lb/d)all year001
Solids, total suspendeddaily maximumreport only (lb/d)all year001
Chloride [as Cl]monthly averagereport only (mg/L)all year001
Chloride [as Cl]daily maximumreport only (mg/L)all year001
Chloride [as Cl]monthly averagereport only (lb/d)all year001
Sulfate, total [as SO4]monthly averagereport only (mg/L)all year001
Sulfate, total [as SO4]daily maximumreport only (mg/L)all year001
Sulfate, total [as SO4]monthly averagereport only (lb/d)all year001
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year001
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year001
Perfluorooctanoic acid (PFOA)daily maximumreport only (ng/L)all year001
Perfluorooctanesulfonatedaily maximumreport only (ng/L)all year001
Perfluorobutanesulfonic acid (PFBS)daily maximumreport only (ng/L)all year001
Hexafluoropropylene oxide dimer acid (HFPO-DA)daily maximumreport only (ng/L)all year001
Solids, total dissolvedmonthly averagereport only (mg/L)all year001
Solids, total dissolveddaily maximumreport only (mg/L)all year001
Solids, total dissolvedmonthly averagereport only (lb/d)all year001
Bromide [as Br]monthly averagereport only (mg/L)all year001
Bromide [as Br]daily maximumreport only (mg/L)all year001
Bromide [as Br]monthly averagereport only (lb/d)all year001
BOD, carbonaceous [5 day, 20 C]monthly average≤ 80 mg/Lall year001
BOD, carbonaceous [5 day, 20 C]daily maximum≤ 160 mg/Lall year001
BOD, carbonaceous [5 day, 20 C]monthly averagereport only (lb/d)all year001
BOD, carbonaceous [5 day, 20 C]daily maximumreport only (lb/d)all year001
pHdaily maximumreport only (SU)all year004
Solids, total suspendeddaily maximumreport only (mg/L)all year004
Nitrogen, total [as N]daily maximumreport only (mg/L)all year004
Phosphorus, total [as P]daily maximumreport only (mg/L)all year004
Zinc, total [as Zn]daily maximumreport only (mg/L)all year004
pHdaily maximumreport only (SU)all year005
Solids, total suspendeddaily maximumreport only (mg/L)all year005
Nitrogen, total [as N]daily maximumreport only (mg/L)all year005
Phosphorus, total [as P]daily maximumreport only (mg/L)all year005
Zinc, total [as Zn]daily maximumreport only (mg/L)all year005
pHdaily maximumreport only (SU)all year006
Solids, total suspendeddaily maximumreport only (mg/L)all year006
Nitrogen, total [as N]daily maximumreport only (mg/L)all year006
Phosphorus, total [as P]daily maximumreport only (mg/L)all year006
Zinc, total [as Zn]daily maximumreport only (mg/L)all year006
pHdaily maximumreport only (SU)all year007
Solids, total suspendeddaily maximumreport only (mg/L)all year007
Nitrogen, total [as N]daily maximumreport only (mg/L)all year007
Phosphorus, total [as P]daily maximumreport only (mg/L)all year007
Zinc, total [as Zn]daily maximumreport only (mg/L)all year007

Cited limits by parameter: Pennsylvania's rules and the federal ones.

Same industry: the 14 Miscellaneous Manufacturing Industries permits in Pennsylvania.

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On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/PA0008761 · MCP: https://passage-data.com/mcp