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

Southern MD. Pre-Release Unit

Correctional Institutions, Hughesville, Maryland. NPDES permit MD0023914, in force until Feb 28, 2030. 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 A monthly (37 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 19 reports late

Limits in force (51)

ParameterStatisticLimitMonthsOutfall
Oxygen, dissolved [DO]instantaneous minimum≥ 7 mg/Lall year001
BOD, 5-day, 20 deg. Cmaximum monthly average≤ 30 mg/LJan, Feb, Mar, Apr, Nov, Dec001
BOD, 5-day, 20 deg. Cmaximum monthly average≤ 6 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 weekly average≤ 9 mg/LMay–Oct001
BOD, 5-day, 20 deg. Cmaximum monthly average≤ 5 lb/dJan, Feb, Mar, Apr, Nov, Dec001
BOD, 5-day, 20 deg. Cmaximum monthly average≤ 1 lb/dMay–Oct001
BOD, 5-day, 20 deg. Cmaximum weekly average≤ 7.5 lb/dJan, Feb, Mar, Apr, Nov, Dec001
BOD, 5-day, 20 deg. Cmaximum weekly average≤ 1.5 lb/dMay–Oct001
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≤ 5 lb/dall year001
Solids, total suspendedmaximum weekly average≤ 7.5 lb/dall year001
Solids, total suspendedcumulative total≤ 1827 lb/yrall 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]cumulative total≤ 274 lb/yrall year001
Nitrogen, organic total [as N]monthly averagereport only (mg/L)all year001
Nitrogen, ammonia total [as N]maximum monthly average≤ 1.8 mg/LMay–Oct001
Nitrogen, ammonia total [as N]maximum monthly average≤ 5.1 mg/LJan, Feb, Mar, Apr, Nov, Dec001
Nitrogen, ammonia total [as N]maximum daily average≤ 14.4 mg/LMay–Oct001
Nitrogen, ammonia total [as N]maximum daily average≤ 18 mg/LJan, Feb, Mar, Apr, Nov, Dec001
Nitrogen, ammonia total [as N]maximum monthly average≤ .3 lb/dMay–Oct001
Nitrogen, ammonia total [as N]maximum monthly average≤ .85 lb/dJan, Feb, Mar, Apr, Nov, Dec001
Nitrogen, ammonia total [as N]maximum daily average≤ 2.4 lb/dMay–Oct001
Nitrogen, ammonia total [as N]maximum daily average≤ 3 lb/dJan, Feb, Mar, Apr, Nov, Dec001
Nitrogen, Kjeldahl, total [as N]maximum monthly average≤ 3 mg/LMay–Oct001
Nitrogen, Kjeldahl, total [as N]monthly averagereport only (mg/L)Jan, Feb, Mar, Apr, Nov, Dec001
Nitrogen, Kjeldahl, total [as N]maximum weekly average≤ 4.5 mg/LMay–Oct001
Nitrogen, Kjeldahl, total [as N]weekly averagereport only (mg/L)Jan, Feb, Mar, Apr, Nov, Dec001
Nitrogen, Kjeldahl, total [as N]maximum monthly average≤ .5 lb/dMay–Oct001
Nitrogen, Kjeldahl, total [as N]monthly averagereport only (lb/d)Jan, Feb, Mar, Apr, Nov, Dec001
Nitrogen, Kjeldahl, total [as N]maximum weekly average≤ .75 lb/dMay–Oct001
Nitrogen, Kjeldahl, total [as N]weekly averagereport only (lb/d)Jan, 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 total≤ 46 lb/yrall 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
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year001
Chlorine, total residualdaily maximum≤ .011 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, totalmonthly totalreport 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 Apr 1, 2027

ParameterNew limitNew or tighterMedian, last 12 months× new limit
Nitrogen, ammonia total [as N], maximum monthly average0.6 mg/L (May–Oct)tighter——
Nitrogen, ammonia total [as N], maximum monthly average0.1 lb/d (May–Oct)tighter——
Nitrogen, ammonia total [as N], maximum monthly average1.8 mg/L (Jan, Feb, Mar, Apr, Nov, Dec)tighter——
Nitrogen, ammonia total [as N], maximum monthly average0.3 lb/d (Jan, Feb, Mar, Apr, Nov, Dec)tighter——
Nitrogen, ammonia total [as N], maximum daily average2.5 mg/L (May–Oct)tighter——
Nitrogen, ammonia total [as N], maximum daily average0.42 lb/d (May–Oct)tighter——
Nitrogen, ammonia total [as N], maximum daily average7.6 mg/L (Jan, Feb, Mar, Apr, Nov, Dec)tighter——
Nitrogen, ammonia total [as N], maximum daily average1.3 lb/d (Jan, Feb, Mar, Apr, Nov, Dec)tighter——

How strict are these limits?

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

Same industry: the 6 Justice, Public Order and Safety 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/MD0023914 · MCP: https://passage-data.com/mcp