Passage Data · Check a report · Use it from your AI

Patuxent River Utility Services, LLC

Federal facility (National Security), Patuxent River, Maryland. NPDES permit MD0020095, in force until Jan 31, 2031. Last 12 months: over a limit 5 times (last June 2026). Source: EPA ECHO, Oct 22, 2026.

Reports due
About 28 days after each period: outfall 001 form A monthly (34 values), outfall 102 form A quarterly (2 values), outfall 101 form A yearly
Last report on file
September 2026
Oct 2024 – Sep 2025
2 values over a limit, 0 required values missing, 0 of 12 reports late

Last 12 months (Oct 1, 2025 – Sep 30, 2026)

Period endingOutfallParameterReportedLimitOver by
January 2026001Solids, total suspended, maximum monthly average13 mg/L≤ 10 mg/L30%
January 2026001Solids, total suspended, maximum weekly average23 mg/L≤ 15 mg/L53%
February 2026001Solids, total suspended, maximum weekly average17 mg/L≤ 15 mg/L13%
March 2026102Coliform, fecal general, maximum2420 MPN/100mL≤ 2.2 MPN/100mL—
June 2026102Coliform, fecal general, maximum7670 MPN/100mL≤ 2.2 MPN/100mL—

Limits in force (42)

ParameterStatisticLimitMonthsOutfall
Oxygen, dissolved [DO]minimum weekly average≥ 6 mg/LFeb–May001
Oxygen, dissolved [DO]instantaneous minimum≥ 5 mg/Lall year001
BOD, 5-day, 20 deg. Cmaximum monthly average≤ 20 mg/Lall year001
BOD, 5-day, 20 deg. Cmaximum weekly average≤ 30 mg/Lall year001
BOD, 5-day, 20 deg. Cmaximum monthly average≤ 7.5 lb/dall year001
BOD, 5-day, 20 deg. Cmaximum weekly average≤ 11.3 lb/dall year001
pHminimum≥ 6.5 SUall year001
pHmaximum≤ 8.5 SUall year001
Solids, total suspendedmaximum monthly average≤ 10 mg/Lall year001
Solids, total suspendedmaximum weekly average≤ 15 mg/Lall year001
Solids, total suspendedmaximum monthly average≤ 3.7 lb/dall year001
Solids, total suspendedmaximum weekly average≤ 5.6 lb/dall year001
Solids, total suspendedannual maximumreport only (lb/yr)all year001
Solids, total suspendedmonthly totalreport only (lb/mo)all year001
Nitrogen, total [as N]monthly averagereport only (mg/L)all year001
Nitrogen, total [as N]monthly totalreport only (lb/mo)all year001
Nitrogen, total [as N]annual maximumreport only (lb/yr)all year001
Nitrogen, organic total [as N]monthly averagereport only (mg/L)all year001
Nitrogen, ammonia total [as N]monthly averagereport only (mg/L)Jan, Feb, Mar, Apr, Nov, Dec001
Nitrogen, ammonia total [as N]maximum monthly average≤ 1.7 mg/LMay–Oct001
Nitrogen, ammonia total [as N]maximum daily average≤ 4.9 mg/LMay–Oct001
Nitrogen, ammonia total [as N]maximum monthly average≤ .6 lb/dMay–Oct001
Nitrogen, ammonia total [as N]maximum daily average≤ 1.8 lb/dMay–Oct001
Nitrogen, Kjeldahl, total [as N]monthly averagereport only (mg/L)all year001
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 maximumreport only (lb/yr)all year001
Phosphorus, total [as P]monthly totalreport only (lb/mo)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≤ .1 mg/Lall year001
Phosphorous, in total orthophosphatemonthly averagereport only (mg/L)all 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, totaltotalreport only (Mgal/mo)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 generalmaximum≤ 2.2 MPN/100mLall year102
Coliform, fecal generalmaximum≤ 2.2 MPN/100mLall year102

How strict are these limits?

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

Same industry: the 8 National Security and International Affairs permits in Maryland.

Check this month's numbers Email me before each report is due

· Save this facility as a site · Superfund sites nearby · Your permits on one board

On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/MD0020095 · MCP: https://passage-data.com/mcp