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

Oldtown WWTP

Sewage treatment plant, Oldtown, Maryland. NPDES permit MD0024759, in force until Jul 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 A monthly (26 values), outfall 101 form A quarterly
Last report on file
August 2026
Oct 2024 – Sep 2025
0 values over a limit, 0 required values missing, 0 of 12 reports late

Limits in force (32)

ParameterStatisticLimitMonthsOutfall
Temperature, water deg. fahrenheitmonthly averagereport only (deg F)all year001
Temperature, water deg. fahrenheitmaximum daily averagereport only (deg F)all year001
Temperature, water deg. fahrenheitmonthly averagereport only (deg F)all year001
Temperature, water deg. fahrenheitmaximum daily averagereport only (deg F)all year001
Temperature, water deg. fahrenheitmonthly averagereport only (deg F)all year001
Temperature, water deg. fahrenheitmaximum daily averagereport 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≤ 10 lb/dall year001
BOD, 5-day, 20 deg. Cmaximum weekly average≤ 15 lb/dall year001
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≤ 10 lb/dall year001
Solids, total suspendedmaximum weekly average≤ 15 lb/dall year001
Nitrogen, ammonia, total [as NH3]maximum monthly average≤ 2.6 mg/LMay–Oct001
Nitrogen, ammonia, total [as NH3]maximum monthly average≤ 8.5 mg/LJan, Feb, Mar, Apr, Nov, Dec001
Nitrogen, ammonia, total [as NH3]maximum monthly average≤ .87 lb/dMay–Oct001
Nitrogen, ammonia, total [as NH3]maximum monthly average≤ 2.8 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≤ 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 Aug 1, 2027

ParameterNew limitNew or tighterMedian, last 12 months× new limit
Nitrogen, ammonia, total [as NH3], maximum monthly average2 lb/d (Jan, Feb, Mar, Apr, Nov, Dec)tighter0.055 lb/d (6 values, 5 below detection)—
Nitrogen, ammonia, total [as NH3], maximum monthly average6.1 mg/L (Jan, Feb, Mar, Apr, Nov, Dec)tighter0.1 mg/L (6 values)0.0164×

How strict are these limits?

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

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/MD0024759 · MCP: https://passage-data.com/mcp