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Howard Seymour Water Reclamation Plant

Sewage treatment plant, major discharger, Lewes, Delaware. NPDES permit DE0021512 expired Oct 31, 2023; its limits still apply. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.

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

Limits in force (28)

ParameterStatisticLimitMonths
Oxygen, dissolved [DO]daily minimumreport only (mg/L)all year
Oxygen, dissolved [DO]daily maximumreport only (mg/L)all year
BOD, 5-day, 20 deg. Cdaily average≤ 15 mg/Lall year
BOD, 5-day, 20 deg. Cdaily maximum≤ 23 mg/Lall year
BOD, 5-day, 20 deg. Cdaily average≤ 188 lb/dall year
BOD, 5-day, 20 deg. Cdaily maximum≤ 288 lb/dall year
BOD, 5-day, 20 deg. Cdaily averagereport only (mg/L)all year
BOD, 5-day, 20 deg. Cdaily maximumreport only (mg/L)all year
pHdaily minimum≥ 6 SUall year
pHdaily maximum≤ 9 SUall year
Solids, total suspendeddaily average≤ 15 mg/Lall year
Solids, total suspendeddaily maximum≤ 23 mg/Lall year
Solids, total suspendeddaily average≤ 188 lb/dall year
Solids, total suspendeddaily maximum≤ 288 lb/dall year
Solids, total suspendeddaily averagereport only (mg/L)all year
Solids, total suspendeddaily maximumreport only (mg/L)all year
Nitrogen, total [as N]daily average≤ 8 mg/Lall year
Nitrogen, total [as N]daily maximumreport only (mg/L)all year
Nitrogen, total [as N]daily average≤ 100 lb/dall year
Nitrogen, total [as N]daily maximumreport only (lb/d)all year
Phosphorus, total [as P]daily average≤ 2 mg/Lall year
Phosphorus, total [as P]daily maximumreport only (mg/L)all year
Phosphorus, total [as P]daily average≤ 25 lb/dall year
Phosphorus, total [as P]daily maximumreport only (lb/d)all year
Enterococci: group D, MF trans, M-E, EIAdaily average≤ 10 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

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/DE0021512 · MCP: https://passage-data.com/mcp