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Old South Mountain Inn WWTP

Eating Places, Boonsboro, Maryland. NPDES permit MD0055425, in force until Nov 30, 2029. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 28 days after each period: outfall 001 form A monthly (23 values), outfall 101 form A monthly (2 values)
Last report on file
August 2026
Oct 2024 – Sep 2025
0 values over a limit, 8 required values missing, 1 of 22 reports late

Limits in force (29)

ParameterStatisticLimitMonthsOutfall
Temperature, water deg. fahrenheitmonthly averagereport only (deg F)all year001
Temperature, water deg. fahrenheitmonthly averagereport only (deg F)all year001
Oxygen, dissolved [DO]instantaneous minimum≥ 6 mg/Lall year001
BOD, 5-day, 20 deg. Cmaximum monthly average≤ 30 mg/Lall year001
BOD, 5-day, 20 deg. Cmaximum weekly average≤ 45 mg/Lall year001
BOD, 5-day, 20 deg. Cmaximum monthly average≤ 1.3 lb/dall year001
BOD, 5-day, 20 deg. Cmaximum weekly average≤ 1.9 lb/dall year001
pHminimum≥ 6.5 SUall year001
pHmaximum≤ 8.5 SUall year001
Solids, total suspendedmaximum monthly average≤ 30 mg/Lall year001
Solids, total suspendedmaximum weekly average≤ 45 mg/Lall year001
Solids, total suspendedmaximum monthly average≤ 1.3 lb/dall year001
Solids, total suspendedmaximum weekly average≤ 1.9 lb/dall year001
Nitrogen, ammonia total [as N]maximum monthly average≤ .91 mg/LMay–Oct001
Nitrogen, ammonia total [as N]maximum monthly average≤ 3.9 mg/LJan, Feb, Mar, Apr, Nov, Dec001
Nitrogen, ammonia total [as N]daily maximum≤ 3.4 mg/LMay–Oct001
Nitrogen, ammonia total [as N]daily maximum≤ 7.9 mg/LJan, Feb, Mar, Apr, Nov, Dec001
Nitrogen, ammonia total [as N]maximum monthly average≤ .04 lb/dMay–Oct001
Nitrogen, ammonia total [as N]maximum monthly average≤ .16 lb/dJan, Feb, Mar, Apr, Nov, Dec001
Nitrogen, ammonia total [as N]daily maximum≤ .14 lb/dMay–Oct001
Nitrogen, ammonia total [as N]daily maximum≤ .33 lb/dJan, Feb, Mar, Apr, Nov, Dec001
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< .1 mg/Lall year001
E. colimonthly geometric mean≤ 126 MPN/100mLall year001
BOD, 5-day, percent removalminimum≥ 85 %all year001
Solids, suspended percent removalminimum≥ 85 %all year001
BOD, 5-day, 20 deg. Cmonthly averagereport only (mg/L)all year101
Solids, total suspendedmonthly averagereport only (mg/L)all year101

How strict are these limits?

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

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On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/MD0055425 · MCP: https://passage-data.com/mcp