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Mahoning TWP Lawrence Cnty

Sewerage Systems, Edinburg, Pennsylvania. NPDES permit PA0240095, in force until Nov 30, 2030. Last 12 months: over a limit 20 times (last June 2026), 28 required values missing. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 28 days after each period: form A monthly (28 values), form Q quarterly
Last report on file
June 2026
Oct 2024 – Sep 2025
12 values over a limit, 0 required values missing, 1 of 16 reports late

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

All 20 values over a limit
Period endingParameterReportedLimitOver by
October 2025BOD, carbonaceous [5 day, 20 C], monthly average28 mg/L≤ 25 mg/L12%
October 2025BOD, carbonaceous [5 day, 20 C], weekly average57 mg/L≤ 40 mg/L43%
October 2025Nitrogen, ammonia total [as N], monthly average54.5 mg/L≤ 43 mg/L27%
October 2025Solids, total suspended, monthly average88 mg/L≤ 30 mg/L193%
October 2025Solids, total suspended, weekly average124 mg/L≤ 45 mg/L176%
November 2025Solids, total suspended, monthly average62 mg/L≤ 30 mg/L107%
November 2025Solids, total suspended, weekly average152 mg/L≤ 45 mg/L238%
December 2025BOD, carbonaceous [5 day, 20 C], monthly average40 mg/L≤ 25 mg/L60%
December 2025BOD, carbonaceous [5 day, 20 C], weekly average71 mg/L≤ 40 mg/L78%
December 2025Solids, total suspended, monthly average39 mg/L≤ 30 mg/L30%
December 2025Solids, total suspended, weekly average76 mg/L≤ 45 mg/L69%
January 2026BOD, carbonaceous [5 day, 20 C], monthly average59 mg/L≤ 25 mg/L136%
January 2026BOD, carbonaceous [5 day, 20 C], weekly average69 mg/L≤ 40 mg/L73%
February 2026BOD, carbonaceous [5 day, 20 C], monthly average35 mg/L≤ 25 mg/L40%
February 2026BOD, carbonaceous [5 day, 20 C], weekly average47 mg/L≤ 40 mg/L18%
February 2026Solids, total suspended, monthly average39 mg/L≤ 30 mg/L30%
February 2026Solids, total suspended, weekly average88 mg/L≤ 45 mg/L96%
March 2026Solids, total suspended, monthly average33 mg/L≤ 30 mg/L10%
March 2026Solids, total suspended, weekly average47 mg/L≤ 45 mg/L4%
June 2026Coliform, fecal general, instantaneous maximum2420 #/100mL≤ 1000 #/100mL142%

Limits in force (42)

ParameterStatisticLimitMonths
Oxygen, dissolved [DO]instantaneous minimum≥ 4 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≤ 90 lb/dall year
Solids, total suspendedweekly average≤ 135 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]quarterly averagereport only (mg/L)all year
Nitrogen, total [as N]quarterly totalreport only (lb/d)all year
Nitrogen, ammonia total [as N]monthly averagereport only (mg/L)May–Oct
Nitrogen, ammonia total [as N]monthly averagereport only (mg/L)Jan, Feb, Mar, Apr, Nov, Dec
Nitrogen, ammonia total [as N]monthly averagereport only (lb/d)May–Oct
Nitrogen, ammonia total [as N]monthly averagereport only (lb/d)Jan, Feb, Mar, Apr, Nov, Dec
Phosphorus, total [as P]quarterly averagereport only (mg/L)all year
Phosphorus, total [as P]quarterly totalreport only (lb/d)all year
Copper, total [as Cu]quarterly averagereport only (mg/L)all year
Copper, total [as Cu]daily maximumreport only (mg/L)all year
Copper, total [as Cu]quarterly averagereport only (lb/d)all 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
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year
Chlorine, total residualmonthly average≤ .5 mg/Lall year
Chlorine, total residualinstantaneous maximum≤ 1.6 mg/Lall year
E. colidaily maximumreport only (#/100mL)all year
Solids, total dissolvedquarterly averagereport only (mg/L)all year
Solids, total dissolvedquarterly averagereport only (lb/d)all year
Coliform, fecal generalgeometric mean≤ 2000 #/100mLJan, Feb, Mar, Apr, Oct, Nov, Dec
Coliform, fecal generalgeometric mean≤ 200 #/100mLMay–Sep
Coliform, fecal generalinstantaneous maximum≤ 10000 #/100mLJan, Feb, Mar, Apr, Oct, Nov, Dec
Coliform, fecal generalinstantaneous maximum≤ 1000 #/100mLMay–Sep
BOD, carbonaceous [5 day, 20 C]monthly average≤ 25 mg/Lall year
BOD, carbonaceous [5 day, 20 C]weekly average≤ 40 mg/Lall year
BOD, carbonaceous [5 day, 20 C]monthly average≤ 75 lb/dall year
BOD, carbonaceous [5 day, 20 C]weekly average≤ 120 lb/dall year

New limits from Dec 1, 2028

ParameterNew limitNew or tighterMedian, last 12 months× new limit
Zinc, total [as Zn], daily maximum1.27 mg/Lnew0.08 mg/L (7 values)0.063×
Zinc, total [as Zn], monthly average2.45 lb/dnew0.05 lb/d (7 values)0.0204×
Zinc, total [as Zn], monthly average0.81 mg/Lnew0.08 mg/L (7 values)0.0988×

How strict are these limits?

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

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