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Armstrong World Industries

Manufacturing Industries, Macon, Georgia. NPDES permit GA0003077, in force until Aug 31, 2027. Last 12 months: over a limit 9 times (last September 2026), 3 of 12 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due: About 15 days after each period: form 1 monthly (12 values)
Renewal application due: Mar 4, 2027 · 180 days before expiry; your permit may set another date
Last report on file: September 2026
Oct 2024 – Sep 2025: 0 values over a limit, 0 required values missing, 2 of 12 reports late

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

Period ending	Parameter	Reported	Limit	Over by
January 2026	BOD, 5-day, 20 deg. C, daily maximum	270 mg/L	≤ 263 mg/L	3%
March 2026	Solids, total suspended, daily average	23.6 mg/L	≤ 23 mg/L	3%
April 2026	Solids, total suspended, daily maximum	57.2 mg/L	≤ 35 mg/L	63%
May 2026	Solids, total suspended, daily maximum	45.6 mg/L	≤ 35 mg/L	30%
June 2026	Solids, total suspended, daily average	35.4 mg/L	≤ 23 mg/L	54%
June 2026	Solids, total suspended, daily maximum	112 mg/L	≤ 35 mg/L	220%
July 2026	Solids, total suspended, daily average	32.1 mg/L	≤ 23 mg/L	40%
July 2026	Solids, total suspended, daily maximum	116 mg/L	≤ 35 mg/L	231%
September 2026	Solids, total suspended, daily maximum	39.4 mg/L	≤ 35 mg/L	13%

Limits in force (12)

Parameter	Statistic	Limit	Months
Temperature, water deg. fahrenheit	daily maximum	report only (deg F)	all year
Oxygen, dissolved [DO]	minimum	≥ 6 mg/L	all year
BOD, 5-day, 20 deg. C	daily average	≤ 175 lb/d	all year
BOD, 5-day, 20 deg. C	daily maximum	≤ 263 lb/d	all year
pH	minimum	≥ 6 SU	all year
pH	maximum	≤ 8.5 SU	all year
Solids, total suspended	daily average	≤ 23 mg/L	all year
Solids, total suspended	daily maximum	≤ 35 mg/L	all year
Phosphorus, total [as P]	daily average	report only (mg/L)	all year
Phosphorus, total [as P]	daily maximum	report only (mg/L)	all year
Flow, in conduit or thru treatment plant	daily average	report only (MGD)	all year
Flow, in conduit or thru treatment plant	daily maximum	report only (MGD)	all year

How strict are these limits?

Solids, total suspended, daily maximum 35 mg/L — stricter than 81% of 150 other minor industrial and other permits in Georgia; 1% have the same limit
Solids, total suspended, daily average 23 mg/L — stricter than 77% of 109 other minor industrial and other permits in Georgia; 1% have the same limit
Oxygen, dissolved [DO], minimum at least 6 mg/L — stricter than 41% of 574 other minor industrial and other permits nationwide; 47% have the same limit

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

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Your permit document is the final word. As JSON: /api/v1/permits/GA0003077 · MCP: https://passage-data.com/mcp