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Town of OXFORD WWTP

Sewage treatment plant, Oxford, Maryland. NPDES permit MD0022543, in force until Feb 28, 2031. Last 12 months: no values over a limit, 1 required value missing, 2 of 13 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 28 days after each period: outfall 001 form B monthly (39 values), outfall 001 form A yearly, outfall 101 form A yearly, outfall 102 form A quarterly
Last report on file
August 2026
Oct 2024 – Sep 2025
4 values over a limit, 0 required values missing, 0 of 12 reports late

Limits in force (55)

ParameterStatisticLimitMonthsOutfall
Oxygen, dissolved [DO]instantaneous minimum≥ 6 mg/Lall year001
BOD, 5-day, 20 deg. Cmaximum monthly average≤ 15 mg/Lall year001
BOD, 5-day, 20 deg. Cmaximum weekly average≤ 22 mg/Lall year001
BOD, 5-day, 20 deg. Cmaximum monthly average≤ 19 lb/dall year001
BOD, 5-day, 20 deg. Cmaximum weekly average≤ 28 lb/dall year001
BOD, 5-day, 20 deg. Cmonthly loadreport only (lb/mo)all year001
BOD, 5-day, 20 deg. Cannual maximum≤ 9638 lb/yrall year001
BOD, 5-day, 20 deg. CEPA's "SEAS TDT"≤ 781 lb/moMay–Oct001
pHminimum≥ 6.5 SUall year001
pHmaximum≤ 8.5 SUall year001
Solids, total suspendedmaximum monthly average≤ 30 mg/LMay–Oct001
Solids, total suspendedmaximum weekly average≤ 45 mg/LMay–Oct001
Solids, total suspendedmaximum monthly average≤ 38 lb/dMay–Oct001
Solids, total suspendedannual maximum≤ 19004 lb/yrall year001
Solids, total suspendedmaximum weekly average≤ 56 lb/dMay–Oct001
Solids, total suspendedmonthly loadreport only (lb/mo)all year001
Solids, total suspendedEPA's "SEAS TDT"report only (lb/mo)May–Oct001
Nitrogen, total [as N]monthly averagereport only (mg/L)all year001
Nitrogen, total [as N]EPA's "SEAS TDT"≤ 468 lb/moMay–Oct001
Nitrogen, total [as N]annual maximum≤ 5621 lb/yrall year001
Nitrogen, total [as N]annual totalreport only (lb/yr)all year001
Nitrogen, total [as N]annual totalreport only (lb/yr)all year001
Nitrogen, total [as N]monthly loadreport only (lb/mo)all year001
Nitrogen, organic total [as N]monthly averagereport only (mg/L)all year001
Nitrogen, ammonia total [as N]maximum monthly average≤ 2.8 mg/LMay–Oct001
Nitrogen, ammonia total [as N]maximum monthly average≤ 5.8 mg/LJan, Feb, Mar, Apr, Nov, Dec001
Nitrogen, ammonia total [as N]maximum weekly average≤ 7.6 mg/LMay–Oct001
Nitrogen, ammonia total [as N]maximum weekly average≤ 12.4 mg/LJan, Feb, Mar, Apr, Nov, Dec001
Nitrogen, ammonia total [as N]maximum monthly average≤ 3.5 lb/dMay–Oct001
Nitrogen, ammonia total [as N]maximum monthly average≤ 7.3 lb/dJan, Feb, Mar, Apr, Nov, Dec001
Nitrogen, ammonia total [as N]maximum weekly average≤ 9.5 lb/dMay–Oct001
Nitrogen, ammonia total [as N]maximum weekly average≤ 15.5 lb/dJan, Feb, Mar, Apr, Nov, Dec001
Nitrite + Nitrate total [as N]monthly averagereport only (mg/L)all year001
Phosphorus, total [as P]monthly averagereport only (mg/L)all year001
Phosphorus, total [as P]annual maximum≤ 624 lb/yrall year001
Phosphorus, total [as P]EPA's "SEAS TDT"≤ 52 lb/moMay–Oct001
Phosphorus, total [as P]annual totalreport only (lb/yr)all year001
Phosphorus, total [as P]annual totalreport only (lb/yr)all year001
Phosphorus, total [as P]monthly loadreport only (lb/mo)all year001
Phosphate, ortho [as P]monthly 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 residualmaximum≤ .049 mg/Lall year001
Coliform, fecal generalmonthly median≤ 14 MPN/100mLall year001
BOD, 5-day, percent removalmonthly average minimum≥ 85 %all year001
Solids, suspended percent removalmonthly average minimum≥ 85 %all year001
Flow, totalmonthly totalreport only (Mgal/mo)all year001
Flow, totalannual totalreport only (Mgal/yr)all year001
Flow, totalannual totalreport only (Mgal/yr)all year001
BOD, 5-day, 20 deg. Cmonthly averagereport only (mg/L)all year101
BOD, 5-day, 20 deg. Cmonthly averagereport only (mg/L)all year101
Solids, total suspendedmonthly averagereport only (mg/L)all year101
Solids, total suspendedmonthly averagereport only (mg/L)all year101
Coliform, fecal generalmonthly averagereport only (MPN/100mL)all year102
Coliform, fecal generalmonthly averagereport only (MPN/100mL)all year102

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/MD0022543 · MCP: https://passage-data.com/mcp