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Bel Alton WWTP

Apartment Building Operators, Bel Alton, Maryland. NPDES permit MD0050334, in force until Jan 31, 2030. Last 12 months: over a limit 2 times (last May 2026). Source: EPA ECHO, Oct 22, 2026.

Reports due
About 28 days after each period: outfall 001 form A monthly (32 values), outfall 101 form A monthly (2 values)
Last report on file
August 2026
Oct 2024 – Sep 2025
0 values over a limit, 0 required values missing, 0 of 20 reports late

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

Period endingParameterReportedLimitOver by
December 2025Solids, total suspended, maximum weekly average65 mg/L≤ 45 mg/L44%
May 2026Nitrogen, Kjeldahl, total [as N], weekly maximum4.83 mg/L≤ 4.5 mg/L7%

Limits in force (46)

ParameterStatisticLimitMonthsOutfall
Oxygen, dissolved [DO]instantaneous minimum≥ 5 mg/Lall year001
BOD, 5-day, 20 deg. Cmaximum monthly average≤ 20 mg/LMay–Oct001
BOD, 5-day, 20 deg. Cmaximum monthly average≤ 30 mg/LJan, Feb, Mar, Apr, Nov, Dec001
BOD, 5-day, 20 deg. Cmaximum weekly average≤ 30 mg/LMay–Oct001
BOD, 5-day, 20 deg. Cmaximum weekly average≤ 45 mg/LJan, Feb, Mar, Apr, Nov, Dec001
BOD, 5-day, 20 deg. Cmaximum monthly average≤ 5.3 lb/dMay–Oct001
BOD, 5-day, 20 deg. Cmaximum monthly average≤ 8 lb/dJan, Feb, Mar, Apr, Nov, Dec001
BOD, 5-day, 20 deg. Cmaximum weekly average≤ 8 lb/dMay–Oct001
BOD, 5-day, 20 deg. Cmaximum weekly average≤ 12 lb/dJan, Feb, Mar, Apr, Nov, Dec001
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≤ 8 lb/dall year001
Solids, total suspendedmaximum weekly average≤ 12 lb/dall year001
Nitrogen, total [as N]monthly averagereport only (mg/L)all year001
Nitrogen, total [as N]totalreport only (lb/mo)all year001
Nitrogen, total [as N]cumulative total≤ 510 lb/yrall year001
Nitrogen, ammonia total [as N]maximum monthly average≤ .7 mg/LMay–Oct001
Nitrogen, ammonia total [as N]maximum monthly average≤ 1.7 mg/LJan, Feb, Mar, Apr, Nov, Dec001
Nitrogen, ammonia total [as N]maximum daily average≤ 3.5 mg/LMay–Oct001
Nitrogen, ammonia total [as N]maximum daily average≤ 5.7 mg/LJan, Feb, Mar, Apr, Nov, Dec001
Nitrogen, ammonia total [as N]maximum monthly average≤ .2 lb/dMay–Oct001
Nitrogen, ammonia total [as N]maximum monthly average≤ .5 lb/dJan, Feb, Mar, Apr, Nov, Dec001
Nitrogen, ammonia total [as N]maximum daily average≤ .9 lb/dMay–Oct001
Nitrogen, ammonia total [as N]maximum daily average≤ 1.5 lb/dJan, Feb, Mar, Apr, Nov, Dec001
Nitrogen, Kjeldahl, total [as N]monthly averagereport only (mg/L)Jan, Feb, Mar, Apr, Nov, Dec001
Nitrogen, Kjeldahl, total [as N]maximum monthly average≤ 3 mg/LMay–Oct001
Nitrogen, Kjeldahl, total [as N]weekly averagereport only (mg/L)Jan, Feb, Mar, Apr, Nov, Dec001
Nitrogen, Kjeldahl, total [as N]weekly maximum≤ 4.5 mg/LMay–Oct001
Nitrogen, Kjeldahl, total [as N]monthly averagereport only (lb/d)Jan, Feb, Mar, Apr, Nov, Dec001
Nitrogen, Kjeldahl, total [as N]maximum monthly average≤ .8 lb/dMay–Oct001
Nitrogen, Kjeldahl, total [as N]weekly averagereport only (lb/d)Jan, Feb, Mar, Apr, Nov, Dec001
Nitrogen, Kjeldahl, total [as N]weekly maximum≤ 1.2 lb/dMay–Oct001
Phosphorus, total [as P]monthly averagereport only (mg/L)all year001
Phosphorus, total [as P]cumulative total≤ 60 lb/yrall year001
Phosphorus, total [as P]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≤ .011 mg/Lall year001
Coliform, fecal generalmonthly geometric mean≤ 14 MPN/100mLall year001
BOD, 5-day, percent removalmonthly average≤ 85 %all year001
Solids, suspended percent removalmonthly average≤ 85 %all year001
Flow, totaltotalreport only (Mgal/mo)all year001
BOD, 5-day, 20 deg. Cmonthly averagereport only (mg/L)all year101
Solids, total suspendedmonthly averagereport only (mg/L)all year101

New limits from Mar 1, 2028

ParameterNew limitNew or tighterMedian, last 12 months× new limit
Nitrogen, ammonia total [as N], maximum monthly average0.5 mg/L (May–Oct)tighter0.13 mg/L (5 values)0.26×
Nitrogen, ammonia total [as N], maximum monthly average0.13 lb/d (May–Oct)tighter0.008 lb/d (5 values)0.0615×

How strict are these limits?

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

Same industry: the 9 Real Estate permits in Maryland.

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Your permit document is the final word. As JSON: /api/v1/permits/MD0050334 · MCP: https://passage-data.com/mcp