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Department of Homeland Security, Federal Emergency Management Agency

Federal facility (Public Order And Safety), Gaithersburg, Maryland. NPDES permit MD0025666 expired Jan 31, 2026; 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 (27 values)
Last report on file
August 2026
Oct 2024 – Sep 2025
0 values over a limit, 0 required values missing, 1 of 12 reports late

Limits in force (35)

ParameterStatisticLimitMonths
Oxygen, dissolved [DO]instantaneous minimum≥ 5 mg/Lall year
BOD, 5-day, 20 deg. Cmaximum monthly average≤ 18 mg/LMay–Oct
BOD, 5-day, 20 deg. Cmaximum monthly average≤ 30 mg/LJan, Feb, Mar, Apr, Nov, Dec
BOD, 5-day, 20 deg. Cmaximum weekly average≤ 27 mg/LMay–Oct
BOD, 5-day, 20 deg. Cmaximum weekly average≤ 45 mg/LJan, Feb, Mar, Apr, Nov, Dec
BOD, 5-day, 20 deg. Cmaximum monthly average≤ 1.5 lb/dMay–Oct
BOD, 5-day, 20 deg. Cmaximum monthly average≤ 2.5 lb/dJan, Feb, Mar, Apr, Nov, Dec
BOD, 5-day, 20 deg. Cmaximum weekly average≤ 2.3 lb/dMay–Oct
BOD, 5-day, 20 deg. Cmaximum weekly average≤ 3.8 lb/dJan, Feb, Mar, Apr, Nov, Dec
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≤ 2.5 lb/dall year
Solids, total suspendedmaximum weekly average≤ 3.8 lb/dall year
Nitrogen, ammonia total [as N]maximum monthly average≤ 9.8 mg/LJan, Feb, Mar, Apr, Nov, Dec
Nitrogen, ammonia total [as N]maximum monthly average≤ 2.6 mg/LMay–Oct
Nitrogen, ammonia total [as N]maximum daily average≤ 6 mg/LMay–Oct
Nitrogen, ammonia total [as N]maximum daily average≤ 14.1 mg/LJan, Feb, Mar, Apr, Nov, Dec
Nitrogen, ammonia total [as N]maximum monthly average≤ 1.2 lb/dJan, Feb, Mar, Apr, Nov, Dec
Nitrogen, ammonia total [as N]maximum monthly average≤ .2 lb/dMay–Oct
Nitrogen, ammonia total [as N]maximum daily average≤ .5 lb/dMay–Oct
Nitrogen, ammonia total [as N]maximum daily average≤ .8 lb/dJan, Feb, Mar, Apr, Nov, Dec
Nitrogen, Kjeldahl, total [as N]maximum monthly average≤ 6 mg/LMay–Oct
Nitrogen, Kjeldahl, total [as N]maximum weekly average≤ 9 mg/LMay–Oct
Nitrogen, Kjeldahl, total [as N]maximum monthly average≤ .5 lb/dMay–Oct
Nitrogen, Kjeldahl, total [as N]maximum weekly average≤ .75 lb/dMay–Oct
Phosphorus, total [as P]monthly averagereport only (mg/L)all year
Phosphorus, total [as P]monthly totalreport only (lb/mo)all year
Phosphorus, total [as P]annual maximum≤ 182 lb/yrall 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 residualmaximum≤ .1 mg/Lall year
E. colimaximum monthly geometric mean≤ 126 MPN/100mLall year
Flow, totalmonthly totalreport only (Mgal/mo)all year

How strict are these limits?

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

Same industry: the 6 Justice, Public Order and Safety permits in Maryland.

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On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/MD0025666 · MCP: https://passage-data.com/mcp