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Port Penn Wastewater Treatment Plant

Sewage treatment plant, Port Penn, Delaware. NPDES permit DE0021539 expired Oct 31, 2026. Last 12 months: no values over a limit, 20 required values missing. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 28 days after each period: form A monthly (20 values)
Last report on file
June 2026
Oct 2024 – Sep 2025
1 value over a limit, 0 required values missing, 1 of 12 reports late

Limits in force (20)

ParameterStatisticLimitMonths
BOD, 5-day, 20 deg. Cdaily average≤ 24 mg/Lall year
BOD, 5-day, 20 deg. Cdaily maximum≤ 36 mg/Lall year
BOD, 5-day, 20 deg. Cdaily average≤ 10 lb/dall year
BOD, 5-day, 20 deg. Cdaily maximum≤ 15 lb/dall year
BOD, 5-day, 20 deg. Cdaily averagereport only (mg/L)all year
BOD, 5-day, 20 deg. Cdaily averagereport only (lb/d)all year
pHdaily minimum≥ 6 SUall year
pHdaily maximum≤ 9 SUall year
Solids, total suspendeddaily average≤ 30 mg/Lall year
Solids, total suspendeddaily maximum≤ 45 mg/Lall year
Solids, total suspendeddaily average≤ 13 lb/dall year
Solids, total suspendeddaily maximum≤ 19 lb/dall year
Solids, total suspendeddaily averagereport only (mg/L)all year
Nitrogen, ammonia total [as N]daily average≤ 35 mg/Lall year
Enterococci: group D, MF trans, M-E, EIAdaily average≤ 35 CFU/100mLall year
Enterococci: group D, MF trans, M-E, EIAdaily maximum≤ 104 CFU/100mLall year
Flow, in conduit or thru treatment plantdaily averagereport only (MGD)all year
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year
Chlorine, total residualdaily minimum≥ 1 mg/Lall year
Chlorine, total residualdaily maximum≤ 4 mg/Lall year

How strict are these limits?

Cited limits by parameter: Delaware'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/DE0021539 · MCP: https://passage-data.com/mcp