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West Chester Boro

Sewage treatment plant, major discharger, West Goshen, Pennsylvania. NPDES permit PA0027031 expired Feb 28, 2008; its limits still apply. Last 12 months: over a limit 3 times (last April 2026), 26 required values missing. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 28 days after each period: outfall 001 form A monthly (26 values), outfall 004 form H yearly
Last report on file
June 2026
Oct 2024 – Sep 2025
0 values over a limit, 0 required values missing, 1 of 13 reports late

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

Period endingParameterReportedLimitOver by
February 2026Nitrogen, ammonia total [as N], monthly average108.1≤ 63 lb/d72%
February 2026Nitrogen, ammonia total [as N], monthly average14.5 mg/L≤ 4.5 mg/L222%
April 2026pH, instantaneous minimum5.8 SU≥ 6 SU—

Limits in force (40)

ParameterStatisticLimitMonthsOutfall
Oxygen, dissolved [DO]instantaneous minimum≥ 5 mg/Lall year001
Oxygen, dissolved [DO]monthly averagereport only (mg/L)all year001
pHinstantaneous minimum≥ 6 SUall year001
pHinstantaneous maximum≤ 9 SUall year001
Solids, total suspendedmonthly average≤ 30 mg/Lall year001
Solids, total suspendedmaximum weekly average≤ 45 mg/Lall year001
Solids, total suspendedmonthly average≤ 418 lb/dall year001
Solids, total suspendedmaximum weekly average≤ 626 lb/dall year001
Nitrogen, ammonia total [as N]monthly average≤ 1.5 mg/LMay–Oct001
Nitrogen, ammonia total [as N]monthly average≤ 4.5 mg/LJan, Feb, Mar, Apr, Nov, Dec001
Nitrogen, ammonia total [as N]monthly average≤ 21 lb/dMay–Oct001
Nitrogen, ammonia total [as N]monthly average≤ 63 lb/dJan, Feb, Mar, Apr, Nov, Dec001
Copper, total [as Cu]monthly averagereport only (mg/L)all year001
Lead, total [as Pb]monthly averagereport only (mg/L)all year001
Zinc, total [as Zn]monthly averagereport only (mg/L)all year001
Chloroformmonthly averagereport only (mg/L)all year001
Phenolics, total recoverablemonthly average≤ .018 mg/Lall year001
Phenolics, total recoverabledaily maximum≤ .036 mg/Lall year001
Phenolics, total recoverablemonthly average≤ .25 lb/dall year001
Phenolics, total recoverabledaily maximum≤ .5 lb/dall year001
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year001
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year001
Chlorine, total residualmonthly average≤ .03 mg/Lall year001
Coliform, fecal general30-day geometric mean≤ 200 #/100mLall year001
BOD, carbonaceous [5 day, 20 C]monthly average≤ 15 mg/LMay–Oct001
BOD, carbonaceous [5 day, 20 C]monthly average≤ 25 mg/LJan, Feb, Mar, Apr, Nov, Dec001
BOD, carbonaceous [5 day, 20 C]maximum weekly average≤ 23 mg/LMay–Oct001
BOD, carbonaceous [5 day, 20 C]maximum weekly average≤ 40 mg/LJan, Feb, Mar, Apr, Nov, Dec001
BOD, carbonaceous [5 day, 20 C]monthly average≤ 209 lb/dMay–Oct001
BOD, carbonaceous [5 day, 20 C]monthly average≤ 348 lb/dJan, Feb, Mar, Apr, Nov, Dec001
BOD, carbonaceous [5 day, 20 C]maximum weekly average≤ 320 lb/dMay–Oct001
BOD, carbonaceous [5 day, 20 C]maximum weekly average≤ 557 lb/dJan, Feb, Mar, Apr, Nov, Dec001
Oxygen demand, chem. [high level] [COD]maximumreport only (mg/L)all year004
pHmaximumreport only (SU)all year004
Solids, total suspendedmaximumreport only (mg/L)all year004
Oil & Greasemaximumreport only (mg/L)all year004
Nitrogen, Kjeldahl, total [as N]maximumreport only (mg/L)all year004
Phosphorus, total [as P]maximumreport only (mg/L)all year004
Iron, dissolved [as Fe]maximumreport only (mg/L)all year004
BOD, carbonaceous [5 day, 20 C]maximumreport only (mg/L)all year004

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/PA0027031 · MCP: https://passage-data.com/mcp