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Cecil County Department of Public Works

Sewage treatment plant, Cherry Hill, Maryland. NPDES permit MD0052825, in force until Mar 31, 2031. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 28 days after each period: outfall 001 form B monthly (32 values), outfall 101 form A yearly
Last report on file
September 2026
Oct 2024 – Sep 2025
1 value over a limit, 0 required values missing, 1 of 12 reports late

Limits in force (44)

ParameterStatisticLimitMonthsOutfall
Oxygen, dissolved [DO]instantaneous minimum≥ 5 mg/Lall year001
BOD, 5-day, 20 deg. Cmaximum monthly average≤ 20 mg/LApr–Oct001
BOD, 5-day, 20 deg. Cmaximum monthly average≤ 30 mg/LJan, Feb, Mar, Nov, Dec001
BOD, 5-day, 20 deg. Cmaximum weekly average≤ 30 mg/LApr–Oct001
BOD, 5-day, 20 deg. Cmaximum weekly average≤ 45 mg/LJan, Feb, Mar, Nov, Dec001
BOD, 5-day, 20 deg. Cmaximum monthly average≤ 42 lb/dApr–Oct001
BOD, 5-day, 20 deg. Cmaximum monthly average≤ 63 lb/dJan, Feb, Mar, Nov, Dec001
BOD, 5-day, 20 deg. Cmaximum weekly average≤ 63 lb/dApr–Oct001
BOD, 5-day, 20 deg. Cmaximum weekly average≤ 94 lb/dJan, Feb, Mar, 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≤ 63 lb/dall year001
Solids, total suspendedmaximum weekly average≤ 94 lb/dall year001
Solids, total suspendedannual averagereport 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]cumulative totalreport only (lb/yr)all year001
Nitrogen, total [as N]monthly totalreport only (lb/mo)all year001
Nitrogen, organic total [as N]monthly averagereport only (mg/L)all year001
Nitrogen, ammonia total [as N]maximum monthly average≤ .9 mg/LMay–Oct001
Nitrogen, ammonia total [as N]maximum monthly average≤ 1.9 mg/LJan, Feb, Mar, Apr, Nov, Dec001
Nitrogen, ammonia total [as N]maximum daily average≤ 6.1 mg/LMay–Oct001
Nitrogen, ammonia total [as N]maximum daily average≤ 6.3 mg/LJan, Feb, Mar, Apr, Nov, Dec001
Nitrogen, ammonia total [as N]maximum monthly average≤ 1.8 lb/dMay–Oct001
Nitrogen, ammonia total [as N]maximum monthly average≤ 4 lb/dJan, Feb, Mar, Apr, Nov, Dec001
Nitrogen, ammonia total [as N]maximum daily average≤ 12.7 lb/dMay–Oct001
Nitrogen, ammonia total [as N]maximum daily average≤ 13 lb/dJan, Feb, Mar, Apr, Nov, Dec001
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]cumulative totalreport only (lb/yr)all year001
Phosphorus, total [as P]monthly totalreport only (lb/mo)all year001
Phosphate, ortho [as P]monthly averagereport only (mg/L)all year001
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year001
Chlorine, total residualmaximum< .1 mg/Lall year001
E. colimaximum monthly geometric mean≤ 126 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

New limits from Apr 1, 2028

ParameterNew limitNew or tighterMedian, last 12 months× new limit
Nitrogen, ammonia total [as N], maximum monthly average1.2 mg/L (Jan, Feb, Mar, Apr, Nov, Dec)tighter0.03 mg/L (5 values)0.025×
Nitrogen, ammonia total [as N], maximum monthly average2.6 lb/d (Jan, Feb, Mar, Apr, Nov, Dec)tighter0.02 lb/d (5 values)0.00769×
Nitrogen, ammonia total [as N], maximum monthly average0.4 mg/L (May–Oct)tighter0.03 mg/L (5 values)0.075×
Nitrogen, ammonia total [as N], maximum monthly average0.8 lb/d (May–Oct)tighter0.02 lb/d (5 values)0.025×
Nitrogen, ammonia total [as N], maximum daily average3.4 lb/d (May–Oct)tighter0.08 lb/d (5 values)0.0235×
Nitrogen, ammonia total [as N], maximum daily average1.6 mg/L (May–Oct)tighter0.08 mg/L (5 values)0.05×

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/MD0052825 · MCP: https://passage-data.com/mcp