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Maryland Management Company, Inc.

Sewage treatment plant, Hagerstown, Maryland. NPDES permit MD0022926, in force until Jul 31, 2030. Last 12 months: no values over a limit, 6 of 14 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 28 days after each period: outfall 001 form A monthly (22 values), outfall 101 form A quarterly (4 values)
Last report on file
August 2026
Oct 2024 – Sep 2025
0 values over a limit, 0 required values missing, 2 of 14 reports late

Limits in force (30)

ParameterStatisticLimitMonthsOutfall
Temperature, water deg. fahrenheitmaximumreport only (deg F)all year001
Oxygen, dissolved [DO]instantaneous minimum≥ 5 mg/Lall year001
Oxygen, dissolved [DO]daily average 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≤ 3.5 lb/dall year001
BOD, 5-day, 20 deg. Cmaximum weekly average≤ 5.3 lb/dall year001
pHminimum≥ 6.5 SUall year001
pHmaximum≤ 7.8 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≤ 3.5 lb/dall year001
Solids, total suspendedmaximum weekly average≤ 5.3 lb/dall year001
Nitrogen, ammonia total [as N]maximum monthly average≤ 1.6 mg/LMay–Oct001
Nitrogen, ammonia total [as N]maximum monthly average≤ 3 mg/LJan, Feb, Mar, Apr, Nov, Dec001
Nitrogen, ammonia total [as N]maximum daily average≤ 8.5 mg/LMay–Oct001
Nitrogen, ammonia total [as N]maximum daily average≤ 8.8 mg/LJan, Feb, Mar, Apr, Nov, Dec001
Nitrogen, ammonia total [as N]maximum monthly average≤ .19 lb/dMay–Oct001
Nitrogen, ammonia total [as N]maximum monthly average≤ .35 lb/dJan, Feb, Mar, Apr, Nov, Dec001
Nitrogen, ammonia total [as N]maximum weekly average≤ 1 lb/dMay–Oct001
Nitrogen, ammonia total [as N]maximum weekly average≤ 1.03 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
E. colimaximum monthly geometric mean≤ 59 MPN/100mLall year001
BOD, 5-day, percent removalmonthly average minimum≥ 85 %all year001
Solids, suspended percent removalmonthly average minimum≥ 85 %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

New limits from Feb 1, 2027

ParameterNew limitNew or tighterMedian, last 12 months× new limit
Nitrogen, ammonia total [as N], maximum monthly average0.16 lb/d (Jan, Feb, Mar, Apr, Nov, Dec)tighter0.003649 lb/d (6 values)0.0228×
Nitrogen, ammonia total [as N], maximum monthly average1.4 mg/L (Jan, Feb, Mar, Apr, Nov, Dec)tighter0.1 mg/L (6 values)0.0714×
Nitrogen, ammonia total [as N], maximum monthly average0.09 lb/d (May–Oct)tighter0.005004 lb/d (5 values)0.0556×
Nitrogen, ammonia total [as N], maximum monthly average0.74 mg/L (May–Oct)tighter0.1 mg/L (5 values)0.135×
Nitrogen, ammonia total [as N], maximum daily average7 mg/L (Jan, Feb, Mar, Apr, Nov, Dec)tighter0.1 mg/L (6 values)0.0143×
Nitrogen, ammonia total [as N], maximum daily average3.1 mg/L (May–Oct)tighter0.1 mg/L (5 values)0.0323×

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/MD0022926 · MCP: https://passage-data.com/mcp