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Delcora

Sewage treatment plant, major discharger, City Of Chester, Pennsylvania. NPDES permit PA0027103 expired Mar 31, 2026; its limits still apply. Last 12 months: over a limit 2 times (last June 2026), 47 required values missing. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 28 days after each period: outfall 001 form A monthly (47 values), outfall 001 form Q quarterly (6 values), outfall 001 form S twice a year, outfall 028 form Y yearly
Last report on file
June 2026
Oct 2024 – Sep 2025
12 values over a limit, 0 required values missing, 0 of 19 reports late

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

Period endingParameterReportedLimitOver by
January 2026Oil & Grease, instantaneous maximum42 mg/L≤ 30 mg/L40%
June 2026Coliform, fecal general, instantaneous maximum> 2420 #/100mL≤ 1000 #/100mL—

Limits in force (67)

ParameterStatisticLimitMonthsOutfall
Oxygen, dissolved [DO]instantaneous minimum≥ 4 mg/Lall year001
BOD, 5-day, 20 deg. Cmonthly averagereport only (mg/L)all year001
BOD, 5-day, 20 deg. Cmonthly averagereport only (lb/d)all year001
pHinstantaneous minimum≥ 6 SUall year001
pHinstantaneous maximum≤ 9 SUall year001
Solids, total suspendedmonthly average≤ 30 mg/Lall year001
Solids, total suspendedweekly average≤ 45 mg/Lall year001
Solids, total suspendedmonthly average≤ 11000 lb/dall year001
Solids, total suspendedweekly average≤ 16500 lb/dall year001
Solids, total suspendedmonthly averagereport only (mg/L)all year001
Solids, total suspendedmonthly averagereport only (lb/d)all year001
Oil & Greasemonthly average≤ 15 mg/Lall year001
Oil & Greaseinstantaneous maximum≤ 30 mg/Lall year001
Oil & Greasemonthly average≤ 5500 lb/dall year001
Nitrogen, total [as N]monthly averagereport only (mg/L)all year001
Nitrogen, ammonia total [as N]monthly average≤ 23 mg/LJan, Feb, Mar, Apr, Oct, Nov, Dec001
Nitrogen, ammonia total [as N]monthly average≤ 15 mg/LMay–Sep001
Nitrogen, ammonia total [as N]monthly average≤ 8440 lb/dJan, Feb, Mar, Apr, Oct, Nov, Dec001
Nitrogen, ammonia total [as N]monthly average≤ 5500 lb/dMay–Sep001
Nitrogen, nitrite total [as N]monthly averagereport only (mg/L)all year001
Nitrogen, nitrate total [as N]monthly averagereport only (mg/L)all year001
Nitrogen, Kjeldahl, total [as N]monthly averagereport only (mg/L)all year001
Phosphorus, total [as P]monthly averagereport only (mg/L)all year001
Cyanide, total [as CN]monthly averagereport only (mg/L)all year001
Chloride [as Cl]monthly averagereport only (mg/L)all year001
Sulfate, total [as SO4]monthly averagereport only (mg/L)all year001
Cadmium, total [as Cd]monthly averagereport only (mg/L)all year001
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
Dichlorobromomethanemonthly averagereport only (mg/L)all year001
Chlorodibromomethanemonthly averagereport only (mg/L)all 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≤ .5 mg/Lall year001
Chlorine, total residualinstantaneous maximum≤ 1 mg/Lall year001
Cyanide, free availablemonthly averagereport only (mg/L)all year001
PCBs Wet Weather Analysisdaily maximumreport only (pg/L)all year001
PCBs Dry Weather Analysisdaily maximumreport only (pg/L)all year001
Toxicity [acute], Ceriodaphnia dubiadaily maximumreport only (tox acute)all year001
Toxicity [chronic], Ceriodaphnia dubiadaily maximum≤ 5.5 tox chronicall year001
Toxicity [acute], Pimephales promelas [Fathead Minnow]daily maximumreport only (tox acute)all year001
Toxicity [chronic], Pimephales promelas [Fathead Minnow]daily maximumreport only (tox chronic)all year001
Solids, total dissolvedmonthly average≤ 1000 mg/Lall year001
Solids, total dissolveddaily maximum≤ 2000 mg/Lall year001
Bromide [as Br]monthly averagereport only (mg/L)all year001
Coliform, fecal generalgeometric mean≤ 200 #/100mLMay–Sep001
Coliform, fecal generalgeometric mean≤ 200 #/100mLJan, Feb, Mar, Apr, Oct, Nov, Dec001
Coliform, fecal generalinstantaneous maximum≤ 1000 #/100mLMay–Sep001
Coliform, fecal generalinstantaneous maximum≤ 1000 #/100mLJan, Feb, Mar, Apr, Oct, Nov, Dec001
BOD, carbonaceous [5 day, 20 C]monthly average≤ 19 mg/Lall year001
BOD, carbonaceous [5 day, 20 C]weekly average≤ 29 mg/Lall year001
BOD, carbonaceous [5 day, 20 C]monthly average≤ 7000 lb/dall year001
BOD, carbonaceous [5 day, 20 C]weekly average≤ 10500 lb/dall year001
BOD, carbonaceous [5 day, 20 C]monthly averagereport only (mg/L)all year001
BOD, carbonaceous [5 day, 20 C]monthly averagereport only (lb/d)all year001
BOD, carb-5 day, 20 deg C, percent removalmonthly average minimum≥ 89.25 %all year001
TU Static 7Day Chronic Ceriodaphnia dubiadaily maximum≤ 5.5 tox chronicall year001
Static 7Day Chronic Pimephales Promelasdaily maximumreport only (tox chronic)all year001
Oxygen demand, chem. [high level] [COD]daily maximumreport only (mg/L)all year028
pHdaily maximumreport only (SU)all year028
Solids, total suspendeddaily maximumreport only (mg/L)all year028
Oil & Greasedaily maximumreport only (mg/L)all year028
Nitrogen, Kjeldahl, total [as N]daily maximumreport only (mg/L)all year028
Phosphorus, total [as P]daily maximumreport only (mg/L)all year028
Iron, dissolved [as Fe]daily maximumreport only (mg/L)all year028
BOD, carbonaceous [5 day, 20 C]daily maximumreport only (mg/L)all year028

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/PA0027103 · MCP: https://passage-data.com/mcp