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Philadelphia Potw

Sewage treatment plant, major discharger, Philadelphia, Mississippi. NPDES permit MS0021156, in force until Mar 31, 2028. Last 12 months: over a limit once (last April 2026), 1 of 15 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 29 days after each period: form A monthly (34 values), form Q quarterly (2 values), form Y yearly
Renewal application due
Oct 3, 2027 · 180 days before expiry; your permit may set another date
Last report on file
August 2026
Oct 2024 – Sep 2025
2 values over a limit, 0 required values missing, 0 of 17 reports late

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

Period endingParameterReportedLimit
April 2026pH, maximum10.15 SU≤ 9 SU

Limits in force (60)

ParameterStatisticLimitMonths
Oxygen, dissolved [DO]minimumreport only (mg/L)all year
Oxygen, dissolved [DO]minimum≥ 6 mg/Lall year
BOD, 5-day, 20 deg. Cmonthly average≤ 30 mg/Lall year
BOD, 5-day, 20 deg. Cmaximum weekly average≤ 45 mg/Lall year
BOD, 5-day, 20 deg. Cmonthly totalreport only (lb/mo)all year
BOD, 5-day, 20 deg. Cannual average≤ 525 lb/dall year
BOD, 5-day, 20 deg. Cmonthly averagereport only (mg/L)all year
BOD, 5-day, 20 deg. Cmaximum weekly averagereport only (mg/L)all year
BOD, 5-day, 20 deg. Cmonthly totalreport only (lb/mo)all year
BOD, 5-day, 20 deg. Cannual averagereport only (lb/d)all year
pHminimum≥ 6 SUall year
pHmaximum≤ 9 SUall year
Solids, total suspendedmonthly average≤ 90 mg/Lall year
Solids, total suspendedmaximum weekly average≤ 135 mg/Lall year
Solids, total suspendedmonthly totalreport only (lb/mo)all year
Solids, total suspendedannual average≤ 1576 lb/dall year
Solids, total suspendedmonthly averagereport only (mg/L)all year
Solids, total suspendedmaximum weekly averagereport only (mg/L)all year
Solids, total suspendedmonthly totalreport only (lb/mo)all year
Solids, total suspendedannual averagereport only (lb/d)all year
Nitrogen, total [as N]monthly averagereport only (mg/L)all year
Nitrogen, total [as N]monthly averagereport only (mg/L)all year
Nitrogen, total [as N]maximum weekly averagereport only (mg/L)all year
Nitrogen, total [as N]maximum weekly averagereport only (mg/L)all year
Nitrogen, total [as N]monthly totalreport only (lb/mo)all year
Nitrogen, total [as N]annual average≤ 128.6 lb/dall year
Nitrogen, total [as N]monthly averagereport only (mg/L)all year
Nitrogen, total [as N]maximum weekly averagereport only (mg/L)all year
Nitrogen, total [as N]annual averagereport only (lb/d)all year
Nitrogen, ammonia total [as N]monthly averagereport only (mg/L)all year
Nitrogen, ammonia total [as N]monthly average≤ 9 mg/Lall year
Nitrogen, ammonia total [as N]maximum weekly averagereport only (mg/L)all year
Nitrogen, ammonia total [as N]maximum weekly average≤ 13.5 mg/Lall year
Nitrogen, ammonia total [as N]monthly totalreport only (lb/mo)all year
Nitrogen, ammonia total [as N]annual average≤ 157 lb/dall year
Nitrogen, ammonia total [as N]monthly totalreport only (lb/mo)all year
Nitrogen, ammonia total [as N]annual average≤ 122 lb/dall year
Nitrogen, ammonia total [as N]monthly averagereport only (mg/L)all year
Nitrogen, ammonia total [as N]maximum weekly averagereport only (mg/L)all year
Nitrogen, ammonia total [as N]monthly totalreport only (lb/mo)all year
Nitrogen, ammonia total [as N]annual averagereport only (lb/d)all year
Phosphorus, total [as P]monthly averagereport only (mg/L)all year
Phosphorus, total [as P]monthly averagereport only (mg/L)all year
Phosphorus, total [as P]maximum weekly averagereport only (mg/L)all year
Phosphorus, total [as P]maximum weekly averagereport only (mg/L)all year
Phosphorus, total [as P]monthly totalreport only (lb/mo)all year
Phosphorus, total [as P]annual average≤ 30.8 lb/dall year
Phosphorus, total [as P]monthly averagereport only (mg/L)all year
Phosphorus, total [as P]maximum weekly averagereport only (mg/L)all year
Phosphorus, total [as P]annual averagereport only (lb/d)all year
Flow, in conduit or thru treatment plantmonthly totalreport only (Mgal/mo)all year
Flow, in conduit or thru treatment plantannual average≤ 2.1 MGDall year
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year
Flow, in conduit or thru treatment plantmaximum weekly averagereport only (MGD)all year
E. colimonthly average≤ 126 #/100mLall year
E. colimaximum weekly average≤ 410 #/100mLall year
BOD, 5-day, percent removalminimum≥ 65 %all year
Solids, suspended percent removalminimum≥ 65 %all year
%Effect Static Renewal 7 Day Chronic Ceriodaphnia dubiaminimum≥ 25 %all year
%Effect Static Renewal 7Day Chronic Pimephales promelasminimum≥ 25 %all year

How strict are these limits?

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

Check this month's numbers Email me before each report is due

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On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/MS0021156 · MCP: https://passage-data.com/mcp