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Pa Amer Water Co

Sewerage Systems, major discharger, Butler, Pennsylvania. NPDES permit PA0026697, in force until Apr 30, 2031. Last 12 months: over a limit 3 times (last December 2025), 50 required values missing. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 28 days after each period: form A monthly (50 values), form Q quarterly
Last report on file
June 2026
Oct 2024 – Sep 2025
1 value over a limit, 0 required values missing, 0 of 12 reports late

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

Period endingParameterReportedLimitOver by
October 2025Coliform, fecal general, geometric mean> 3 #/100mL≤ 2000 #/100mL—
October 2025Coliform, fecal general, instantaneous maximum> 2420 #/100mL≤ 10000 #/100mL—
December 2025Oxygen, dissolved [DO], instantaneous minimum3.8 mg/L≥ 5 mg/L24%

Limits in force (58)

ParameterStatisticLimitMonths
Oxygen, dissolved [DO]instantaneous minimum≥ 5 mg/Lall year
BOD, 5-day, 20 deg. Cmonthly averagereport only (mg/L)all year
BOD, 5-day, 20 deg. Cmonthly averagereport only (lb/d)all year
BOD, 5-day, 20 deg. Cdaily maximumreport only (lb/d)all 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≤ 2502 lb/dall year
Solids, total suspendedweekly average≤ 3753 lb/dall year
Solids, total suspendedmonthly averagereport only (mg/L)all year
Solids, total suspendedmonthly averagereport only (lb/d)all year
Solids, total suspendeddaily maximumreport only (lb/d)all year
Nitrogen, total [as N]monthly averagereport only (mg/L)all year
Nitrogen, total [as N]monthly averagereport only (lb/d)all year
Nitrogen, ammonia total [as N]monthly average≤ 5.5 mg/LJan, Feb, Mar, Apr, Nov, Dec
Nitrogen, ammonia total [as N]monthly average≤ 2 mg/LMay–Oct
Nitrogen, ammonia total [as N]monthly average≤ 459 lb/dJan, Feb, Mar, Apr, Nov, Dec
Nitrogen, ammonia total [as N]monthly average≤ 167 lb/dMay–Oct
Phosphorus, total [as P]monthly average≤ 2 mg/Lall year
Phosphorus, total [as P]monthly average≤ 167 lb/dall year
Arsenic, total [as As]monthly averagereport only (mg/L)all year
Arsenic, total [as As]daily maximumreport only (mg/L)all year
Arsenic, total [as As]monthly averagereport only (lb/d)all year
Arsenic, total [as As]daily maximumreport only (lb/d)all year
Boron, total [as B]monthly averagereport only (mg/L)all year
Boron, total [as B]daily maximumreport only (mg/L)all year
Boron, total [as B]monthly averagereport only (lb/d)all year
Boron, total [as B]daily maximumreport only (lb/d)all year
Copper, total [as Cu]monthly average≤ 21 ug/Lall year
Copper, total [as Cu]daily maximum≤ 32.8 ug/Lall year
Copper, total [as Cu]monthly average≤ 1.75 lb/dall year
Copper, total [as Cu]daily maximum≤ 2.73 lb/dall year
Zinc, total [as Zn]monthly averagereport only (mg/L)all year
Zinc, total [as Zn]daily maximumreport only (mg/L)all year
Zinc, total [as Zn]monthly averagereport only (lb/d)all year
Zinc, total [as Zn]daily maximumreport only (lb/d)all year
Aluminum, total [as Al]monthly averagereport only (mg/L)all year
Aluminum, total [as Al]daily maximumreport only (mg/L)all year
Aluminum, total [as Al]monthly averagereport only (lb/d)all year
Aluminum, total [as Al]daily maximumreport only (lb/d)all year
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year
Flow, in conduit or thru treatment plantweekly averagereport only (MGD)all year
Chlorine, total residualmonthly average≤ .33 mg/Lall year
Chlorine, total residualinstantaneous maximum≤ 1.1 mg/Lall year
E. coliinstantaneous maximumreport only (#/100mL)all year
Perfluorooctanoic acid (PFOA)daily maximumreport only (ng/L)all year
Perfluorooctanesulfonatedaily maximumreport only (ng/L)all year
Perfluorobutanesulfonic acid (PFBS)daily maximumreport only (ng/L)all year
Hexafluoropropylene oxide dimer acid (HFPO-DA)daily maximumreport only (ng/L)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≤ 11 mg/Lall year
BOD, carbonaceous [5 day, 20 C]weekly average≤ 16.5 mg/Lall year
BOD, carbonaceous [5 day, 20 C]monthly average≤ 917 lb/dall year
BOD, carbonaceous [5 day, 20 C]weekly average≤ 1376 lb/dall year

New limits from Apr 1, 2031

ParameterNew limitNew or tighterMedian, last 12 months× new limit
Chlorine, total residual, instantaneous maximum0.202 mg/Ltighter0.45 mg/L (9 values)2.23×
Chlorine, total residual, monthly average0.062 mg/Ltighter0.28 mg/L (9 values)4.52×

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

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