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Town of Denton

Sewage treatment plant, Denton, Maryland. NPDES permit MD0020494 expired Jul 31, 2025; its limits still apply. Last 12 months: no values over a limit, 2 of 12 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 28 days after each period: form A monthly (29 values), form Z yearly
Last report on file
August 2026
Oct 2024 – Sep 2025
0 values over a limit, 0 required values missing, 0 of 13 reports late

Limits in force (38)

ParameterStatisticLimitMonths
Oxygen, dissolved [DO]instantaneous minimum≥ 5 mg/Lall year
Oxygen, dissolved [DO]monthly average minimum≥ 5.5 mg/Lall year
Oxygen, dissolved [DO]minimum weekly average≥ 6 mg/LFeb–May
BOD, 5-day, 20 deg. Cmaximum monthly average≤ 30 mg/Lall year
BOD, 5-day, 20 deg. Cmaximum weekly average≤ 45 mg/Lall year
BOD, 5-day, 20 deg. Cmaximum monthly average≤ 200 lb/dall year
BOD, 5-day, 20 deg. Cmaximum weekly average≤ 300 lb/dall year
pHminimum≥ 6.5 SUall year
pHmaximum≤ 8.5 SUall year
Solids, total suspendedmaximum monthly average≤ 30 mg/Lall year
Solids, total suspendedmaximum weekly average≤ 45 mg/Lall year
Solids, total suspendedmaximum monthly average≤ 200 lb/dall year
Solids, total suspendedmaximum weekly average≤ 300 lb/dall year
Nitrogen, total [as N]monthly averagereport only (mg/L)all year
Nitrogen, total [as N]annual maximum≤ 9476 lb/yrall year
Nitrogen, total [as N]monthly totalreport only (lb/mo)all year
Nitrogen, total [as N]annual totalreport only (lb/yr)all year
Nitrogen, total [as N]annual totalreport only (lb/yr)all year
Nitrogen, organic total [as N]monthly averagereport only (mg/L)all year
Nitrogen, ammonia total [as N]monthly averagereport only (mg/L)all year
Nitrogen, Kjeldahl, total [as N]monthly averagereport only (mg/L)all year
Nitrite + Nitrate total [as N]monthly averagereport only (mg/L)all year
Phosphorus, total [as P]monthly averagereport only (mg/L)all year
Phosphorus, total [as P]annual maximum≤ 7116.6 lb/yrall year
Phosphorus, total [as P]monthly totalreport only (lb/mo)all year
Phosphorus, total [as P]annual totalreport only (lb/yr)all year
Phosphorus, total [as P]annual totalreport only (lb/yr)all year
Phosphate, ortho [as P]monthly averagereport only (mg/L)all year
Nitrogen, total [as N] [adjusted]annual total≤ 9746 lb/yrall year
Nitrogen, total [as N] [adjusted]annual total≤ 9746 lb/yrall year
Nitrogen, total [as N] [credit]total≤ 250 lb/yrall year
Enterococci: group D, MF trans, M-E, EIAmaximum≤ 35 MPN/100mLall year
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year
Chlorine, total residualdaily maximum≤ .1 mg/Lall year
Flow, totalmonthly totalreport only (Mgal/mo)all year
Flow, totalannual totalreport only (Mgal/yr)all year
Flow, totalannual totalreport only (Mgal/yr)all year

How strict are these limits?

Cited limits by parameter: Maryland'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/MD0020494 · MCP: https://passage-data.com/mcp