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Maryland Environmental Service, Water/Watewater Division

Sewage treatment plant, Glen Arm, Maryland. NPDES permit MD0067903 expired Jan 31, 2026; its limits still apply. Last 12 months: over a limit 12 times (last June 2026). Source: EPA ECHO, Oct 22, 2026.

Reports due
About 28 days after each period: form A monthly (32 values)
Last report on file
August 2026
Oct 2024 – Sep 2025
7 values over a limit, 0 required values missing, 0 of 12 reports late

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

Period endingParameterReportedLimitOver by
November 2025Solids, total suspended, maximum weekly average33 mg/L≤ 30 mg/L10%
November 2025pH, minimum6.4 SU≥ 6.5 SU—
December 2025Solids, total suspended, maximum weekly average43 mg/L≤ 30 mg/L43%
January 2026BOD, 5-day, 20 deg. C, maximum weekly average61.8 mg/L≤ 45 mg/L37%
January 2026Nitrogen, ammonia total [as N], maximum monthly average8.1 mg/L≤ 2.7 mg/L200%
January 2026Nitrogen, ammonia total [as N], maximum daily average29.5 mg/L≤ 6.7 mg/L340%
January 2026Solids, total suspended, maximum monthly average34 mg/L≤ 20 mg/L70%
January 2026Solids, total suspended, maximum weekly average50 mg/L≤ 30 mg/L67%
February 2026Nitrogen, ammonia total [as N], maximum monthly average4.1 mg/L≤ 2.7 mg/L52%
February 2026Nitrogen, ammonia total [as N], maximum daily average.29 lb/d≤ .27 lb/d7%
February 2026Nitrogen, ammonia total [as N], maximum daily average16.1 mg/L≤ 6.7 mg/L140%
June 2026Oxygen, dissolved [DO], instantaneous minimum6.7 mg/L≥ 7 mg/L4%

Limits in force (40)

ParameterStatisticLimitMonths
Temperature, water deg. fahrenheitmonthly averagereport only (deg F)all year
Temperature, water deg. fahrenheitmaximum daily averagereport only (deg F)all year
Temperature, water deg. fahrenheitmonthly averagereport only (deg F)all year
Temperature, water deg. fahrenheitmaximum daily averagereport only (deg F)all year
Temperature, water deg. fahrenheitmonthly averagereport only (deg F)all year
Temperature, water deg. fahrenheitmaximum daily averagereport only (deg F)all year
Oxygen, dissolved [DO]instantaneous minimum≥ 7 mg/Lall year
BOD, 5-day, 20 deg. Cmaximum monthly average≤ 12 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≤ 18 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≤ .5 lb/dMay–Oct
BOD, 5-day, 20 deg. Cmaximum monthly average≤ 1.3 lb/dJan, Feb, Mar, Apr, Nov, Dec
BOD, 5-day, 20 deg. Cmaximum weekly average≤ .75 lb/dMay–Oct
BOD, 5-day, 20 deg. Cmaximum weekly average≤ 1.9 lb/dJan, Feb, Mar, Apr, Nov, Dec
pHminimum≥ 6.5 SUall year
pHmaximum≤ 8.5 SUall year
Solids, total suspendedmaximum monthly average≤ 20 mg/Lall year
Solids, total suspendedmonthly averagereport only (mg/L)all year
Solids, total suspendedmaximum weekly average≤ 30 mg/Lall year
Solids, total suspendedmaximum monthly average≤ .83 lb/dall year
Solids, total suspendedannual maximumreport only (lb/yr)all year
Solids, total suspendedmaximum weekly average≤ 1.3 lb/dall year
Solids, total suspendedmonthly totalreport only (lb/mo)all year
Oil & Greasemaximum monthly average≤ 15 mg/Lall year
Oil & Greasemaximum daily average≤ 15 mg/Lall year
Oil & Greasemaximum monthly average≤ .62 lb/dall year
Oil & Greasemaximum daily average≤ .62 lb/dall year
Nitrogen, ammonia total [as N]maximum monthly average≤ 2.7 mg/LJan, Feb, Mar, Apr, Nov, Dec
Nitrogen, ammonia total [as N]maximum monthly average≤ 2 mg/LMay–Oct
Nitrogen, ammonia total [as N]maximum daily average≤ 6.7 mg/LJan, Feb, Mar, Apr, Nov, Dec
Nitrogen, ammonia total [as N]maximum daily average≤ 7.4 mg/LMay–Oct
Nitrogen, ammonia total [as N]maximum monthly average≤ .11 lb/dJan, Feb, Mar, Apr, Nov, Dec
Nitrogen, ammonia total [as N]maximum monthly average≤ .08 lb/dMay–Oct
Nitrogen, ammonia total [as N]maximum daily average≤ .27 lb/dJan, Feb, Mar, Apr, Nov, Dec
Nitrogen, ammonia total [as N]maximum daily average≤ .3 lb/dMay–Oct
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all 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.

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On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/MD0067903 · MCP: https://passage-data.com/mcp