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East Vincent TWP Chester Cnty

Sewage treatment plant, Spring City, Pennsylvania. NPDES permit PA0050466, in force until Jan 31, 2028. Last 12 months: over a limit 19 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)
Renewal application due
Aug 4, 2027 · 180 days before expiry; your permit may set another date
Last report on file
June 2026
Oct 2024 – Sep 2025
0 values over a limit, 2 required values missing, 0 of 16 reports late

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

All 19 values over a limit
Period endingParameterReportedLimitOver by
November 2025Coliform, fecal general, instantaneous maximum2800 #/100mL≤ 1000 #/100mL180%
December 2025Coliform, fecal general, geometric mean> 328 #/100mL≤ 200 #/100mL—
December 2025Coliform, fecal general, instantaneous maximum> 20000 #/100mL≤ 1000 #/100mL—
December 2025Nitrogen, ammonia total [as N], monthly average< 1.6 mg/L≤ 1.5 mg/L7%
February 2026Oxygen, dissolved [DO], instantaneous minimum4.65 mg/L≥ 5 mg/L7%
February 2026Phosphorus, total [as P], monthly average3.3 mg/L≤ 2 mg/L65%
February 2026Solids, total suspended, monthly average11 mg/L≤ 10 mg/L10%
February 2026Solids, total suspended, weekly average30 mg/L≤ 15 mg/L100%
February 2026Solids, total suspended, weekly average46.7≤ 41.3 lb/d13%
March 2026Nitrogen, ammonia total [as N], monthly average13.68≤ 4.13 lb/d231%
March 2026Nitrogen, ammonia total [as N], monthly average7.9 mg/L≤ 1.5 mg/L427%
March 2026Nitrogen, total [as N], monthly average< 10.5 mg/L≤ 10 mg/L5%
March 2026Solids, total suspended, monthly average14.4 mg/L≤ 10 mg/L44%
March 2026Solids, total suspended, weekly average18 mg/L≤ 15 mg/L20%
May 2026Nitrogen, ammonia total [as N], monthly average< 2.3 mg/L≤ 1.5 mg/L53%
June 2026Nitrogen, ammonia total [as N], monthly average4.2 mg/L≤ 1.5 mg/L180%
June 2026Nitrogen, ammonia total [as N], monthly average4.7≤ 4.13 lb/d14%
June 2026Oxygen, dissolved [DO], instantaneous minimum4.4 mg/L≥ 5 mg/L12%
June 2026Phosphorus, total [as P], monthly average1.9 mg/L≤ 1.5 mg/L27%

Limits in force (32)

ParameterStatisticLimitMonths
Oxygen, dissolved [DO]instantaneous minimum≥ 5 mg/Lall year
BOD, 5-day, 20 deg. Cmonthly averagereport only (mg/L)all year
pHinstantaneous minimum≥ 6 SUall year
pHinstantaneous maximum≤ 9 SUall year
Solids, total suspendedmonthly average≤ 10 mg/Lall year
Solids, total suspendedweekly average≤ 15 mg/Lall year
Solids, total suspendedmonthly average≤ 27.5 lb/dall year
Solids, total suspendedweekly average≤ 41.3 lb/dall year
Solids, total suspendedmonthly averagereport only (mg/L)all year
Nitrogen, total [as N]monthly average≤ 10 mg/Lall year
Nitrogen, total [as N]monthly average≤ 27.5 lb/dall year
Nitrogen, ammonia total [as N]monthly average≤ 1.5 mg/Lall year
Nitrogen, ammonia total [as N]monthly average≤ 4.13 lb/dall year
Phosphorus, total [as P]monthly average≤ 1.5 mg/LApr–Oct
Phosphorus, total [as P]monthly average≤ 2 mg/LJan, Feb, Mar, Nov, Dec
Phosphorus, total [as P]monthly average≤ 4.13 lb/dApr–Oct
Phosphorus, total [as P]monthly average≤ 5.5 lb/dJan, Feb, Mar, Nov, Dec
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
Ultraviolet light dosagedaily minimumreport only (mW-sec/cm2)all year
Solids, total dissolvedmonthly average≤ 1000 mg/Lall year
Solids, total dissolveddaily maximum≤ 2000 mg/Lall year
Coliform, fecal generalgeometric mean≤ 200 #/100mLMay–Sep
Coliform, fecal generalgeometric mean≤ 200 #/100mLJan, Feb, Mar, Apr, Oct, Nov, Dec
Coliform, fecal generalinstantaneous maximum≤ 1000 #/100mLMay–Sep
Coliform, fecal generalinstantaneous maximum≤ 1000 #/100mLJan, Feb, Mar, Apr, Oct, Nov, Dec
BOD, carbonaceous [5 day, 20 C]monthly average≤ 10 mg/Lall year
BOD, carbonaceous [5 day, 20 C]weekly average≤ 15 mg/Lall year
BOD, carbonaceous [5 day, 20 C]monthly average≤ 27.5 lb/dall year
BOD, carbonaceous [5 day, 20 C]weekly average≤ 41.3 lb/dall year
BOD, carbonaceous [5 day, 20 C]monthly averagereport only (mg/L)all year

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/PA0050466 · MCP: https://passage-data.com/mcp