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Perry TWP Muni Auth Snyder Cnty

Sewage treatment plant, Mt Pleasant Mills, Pennsylvania. NPDES permit PA0113719, in force until Jun 30, 2030. Last 12 months: over a limit 34 times (last June 2026), 27 required values missing. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 28 days after each period: form A monthly (27 values), form Q quarterly (1 value)
Last report on file
June 2026
Oct 2024 – Sep 2025
14 values over a limit, 0 required values missing, 0 of 13 reports late

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

All 34 values over a limit
Period endingParameterReportedLimitOver by
January 2026BOD, carbonaceous [5 day, 20 C], monthly average47 mg/L≤ 25 mg/L88%
January 2026BOD, carbonaceous [5 day, 20 C], weekly average67 mg/L≤ 40 mg/L68%
January 2026Solids, total suspended, monthly average33 mg/L≤ 30 mg/L10%
January 2026Solids, total suspended, weekly average68 mg/L≤ 45 mg/L51%
February 2026BOD, carbonaceous [5 day, 20 C], monthly average58 mg/L≤ 25 mg/L132%
February 2026BOD, carbonaceous [5 day, 20 C], weekly average97 mg/L≤ 40 mg/L143%
February 2026Chlorine, total residual, monthly average.6 mg/L≤ .5 mg/L20%
February 2026Coliform, fecal general, geometric mean< 3925 #/100mL≤ 2000 #/100mL96%
February 2026Coliform, fecal general, instantaneous maximum168000 #/100mL≤ 10000 #/100mL1580%
February 2026Solids, total suspended, monthly average36 mg/L≤ 30 mg/L20%
February 2026Solids, total suspended, weekly average56 mg/L≤ 45 mg/L24%
March 2026BOD, carbonaceous [5 day, 20 C], monthly average17≤ 12.5 lb/d36%
March 2026BOD, carbonaceous [5 day, 20 C], monthly average49 mg/L≤ 25 mg/L96%
March 2026BOD, carbonaceous [5 day, 20 C], weekly average26≤ 20 lb/d30%
March 2026BOD, carbonaceous [5 day, 20 C], weekly average70 mg/L≤ 40 mg/L75%
April 2026BOD, carbonaceous [5 day, 20 C], monthly average69 mg/L≤ 25 mg/L176%
April 2026BOD, carbonaceous [5 day, 20 C], weekly average152 mg/L≤ 40 mg/L280%
April 2026Coliform, fecal general, instantaneous maximum75000 #/100mL≤ 10000 #/100mL650%
April 2026Solids, total suspended, monthly average39 mg/L≤ 30 mg/L30%
April 2026Solids, total suspended, weekly average47 mg/L≤ 45 mg/L4%
May 2026BOD, carbonaceous [5 day, 20 C], monthly average15≤ 12.5 lb/d20%
May 2026BOD, carbonaceous [5 day, 20 C], monthly average75 mg/L≤ 25 mg/L200%
May 2026BOD, carbonaceous [5 day, 20 C], weekly average23≤ 20 lb/d15%
May 2026BOD, carbonaceous [5 day, 20 C], weekly average93 mg/L≤ 40 mg/L133%
May 2026Coliform, fecal general, instantaneous maximum1440 #/100mL≤ 1000 #/100mL44%
May 2026Nitrogen, ammonia total [as N], monthly average28.5 mg/L≤ 24 mg/L19%
May 2026Nitrogen, ammonia total [as N], weekly average36.7 mg/L≤ 36 mg/L2%
May 2026Solids, total suspended, monthly average16≤ 15 lb/d7%
May 2026Solids, total suspended, monthly average72 mg/L≤ 30 mg/L140%
May 2026Solids, total suspended, weekly average114 mg/L≤ 45 mg/L153%
May 2026Solids, total suspended, weekly average28≤ 22.5 lb/d24%
June 2026BOD, carbonaceous [5 day, 20 C], monthly average29 mg/L≤ 25 mg/L16%
June 2026BOD, carbonaceous [5 day, 20 C], weekly average42 mg/L≤ 40 mg/L5%
June 2026Nitrogen, ammonia total [as N], monthly average28.6 mg/L≤ 24 mg/L19%

Limits in force (34)

ParameterStatisticLimitMonths
Oxygen, dissolved [DO]instantaneous minimumreport only (mg/L)all 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≤ 15 lb/dall year
Solids, total suspendedweekly average≤ 22.5 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, ammonia total [as N]monthly averagereport only (mg/L)Jan, Feb, Mar, Apr, Nov, Dec
Nitrogen, ammonia total [as N]monthly average≤ 24 mg/LMay–Oct
Nitrogen, ammonia total [as N]weekly averagereport only (mg/L)Jan, Feb, Mar, Apr, Nov, Dec
Nitrogen, ammonia total [as N]weekly average≤ 36 mg/LMay–Oct
Nitrogen, ammonia total [as N]monthly averagereport only (lb/d)Jan, Feb, Mar, Apr, Nov, Dec
Nitrogen, ammonia total [as N]monthly average≤ 12 lb/dMay–Oct
Nitrogen, ammonia total [as N]weekly averagereport only (lb/d)Jan, Feb, Mar, Apr, Nov, Dec
Nitrogen, ammonia total [as N]weekly average≤ 18 lb/dMay–Oct
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. 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≤ 40 mg/Lall year
BOD, carbonaceous [5 day, 20 C]monthly average≤ 12.5 lb/dall year
BOD, carbonaceous [5 day, 20 C]weekly average≤ 20 lb/dall year

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

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