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Armstrong Cnty Ind Dev Auth

Sewage treatment plant, Freeport, Pennsylvania. NPDES permit PA0218138, in force until Aug 31, 2029. Last 12 months: over a limit 4 times (last May 2026), 50 required values missing. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 28 days after each period: form A monthly (25 values), form Q quarterly (5 values), form Y yearly
Last report on file
June 2026
Oct 2024 – Sep 2025
1 value over a limit, 0 required values missing, 0 of 17 reports late

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

Period endingParameterReportedLimitOver by
November 2025Solids, total suspended, monthly average< 35.7 mg/L≤ 30 mg/L19%
November 2025Solids, total suspended, weekly average53.5 mg/L≤ 45 mg/L19%
May 2026Nitrogen, ammonia total [as N], monthly average3.8 mg/L≤ 1.4 mg/L171%
May 2026Nitrogen, ammonia total [as N], weekly average8.8 mg/L≤ 2.1 mg/L319%

Limits in force (38)

ParameterStatisticLimitMonths
Oxygen, dissolved [DO]instantaneous minimum≥ 5 mg/Lall year
pHinstantaneous minimum≥ 6 SUall year
pHinstantaneous maximum≤ 9 SUall year
Solids, total suspendedmonthly average≤ 30 mg/Lall year
Solids, total suspendedweekly average≤ 45 mg/Lall year
Solids, total suspendedmonthly average≤ 100 lb/dall year
Solids, total suspendedweekly average≤ 151.1 lb/dall year
Nitrogen, total [as N]annual averagereport only (mg/L)all year
Nitrogen, ammonia total [as N]monthly average≤ 1.4 mg/LMay–Oct
Nitrogen, ammonia total [as N]monthly average≤ 4.2 mg/LJan, Feb, Mar, Apr, Nov, Dec
Nitrogen, ammonia total [as N]weekly average≤ 2.1 mg/LMay–Oct
Nitrogen, ammonia total [as N]weekly average≤ 6.3 mg/LJan, Feb, Mar, Apr, Nov, Dec
Nitrogen, ammonia total [as N]monthly average≤ 4.6 lb/dMay–Oct
Nitrogen, ammonia total [as N]monthly average≤ 14 lb/dJan, Feb, Mar, Apr, Nov, Dec
Nitrogen, ammonia total [as N]weekly average≤ 7 lb/dMay–Oct
Nitrogen, ammonia total [as N]weekly average≤ 21 lb/dJan, Feb, Mar, Apr, Nov, Dec
Phosphorus, total [as P]annual averagereport only (mg/L)all year
Copper, total [as Cu]monthly averagereport only (mg/L)all year
Copper, total [as Cu]weekly averagereport only (mg/L)all year
Copper, total [as Cu]monthly averagereport only (lb/d)all year
Copper, total [as Cu]weekly averagereport only (lb/d)all year
Zinc, total [as Zn]quarterly averagereport only (mg/L)all year
Zinc, total [as Zn]daily maximumreport only (mg/L)all year
Zinc, total [as Zn]quarterly averagereport only (lb/d)all year
Zinc, total [as Zn]daily maximumreport only (lb/d)all year
Ultraviolet light intensitymonthly averagereport only (mW/cm2)all year
Ultraviolet light intensityweekly averagereport only (mW/cm2)all year
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year
E. coliinstantaneous maximumreport only (#/100mL)all year
Coliform, fecal generalgeometric mean≤ 200 #/100mLMay–Sep
Coliform, fecal generalgeometric mean≤ 2000 #/100mLJan, Feb, Mar, Apr, Oct, Nov, Dec
Coliform, fecal generalinstantaneous maximum≤ 1000 #/100mLMay–Sep
Coliform, fecal generalinstantaneous maximum≤ 10000 #/100mLJan, Feb, Mar, Apr, Oct, Nov, Dec
BOD, carbonaceous [5 day, 20 C]monthly average≤ 25 mg/Lall year
BOD, carbonaceous [5 day, 20 C]weekly average≤ 37.5 mg/Lall year
BOD, carbonaceous [5 day, 20 C]monthly average≤ 83.4 lb/dall year
BOD, carbonaceous [5 day, 20 C]weekly average≤ 125.1 lb/dall year

New limits from Sep 1, 2027

ParameterNew limitNew or tighterMedian, last 12 months× new limit
Copper, total [as Cu], monthly average0.011 mg/Lnew0.014 mg/L (8 values, 2 below detection)1.27×
Copper, total [as Cu], weekly average0.016 mg/Lnew0.025 mg/L (8 values)1.56×
Copper, total [as Cu], monthly average0.036 lb/dnew0.007 lb/d (8 values, 1 below detection)0.194×
Copper, total [as Cu], weekly average0.054 lb/dnew0.01 lb/d (8 values, 1 below detection)0.185×

How strict are these limits?

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

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On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/PA0218138 · MCP: https://passage-data.com/mcp