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

Frederick County Div of Utilities and Solid Waste MGMT.

Sewage treatment plant, Frederick, Maryland. NPDES permit MD0022683 expired Jul 31, 2026; its limits still apply. Last 12 months: over a limit 2 times (last September 2026). Source: EPA ECHO, Oct 22, 2026.

Reports due
About 28 days after each period: form A monthly (25 values)
Last report on file
September 2026
Oct 2024 – Sep 2025
0 values over a limit, 1 required value missing, 1 of 12 reports late

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

Period endingParameterReportedLimitOver by
January 2026Nitrogen, ammonia total [as N], maximum daily average3.8 mg/L≤ 3.6 mg/L6%
September 2026Solids, total suspended, maximum weekly average35 mg/L≤ 18 mg/L94%

Limits in force (37)

ParameterStatisticLimitMonths
Oxygen, dissolved [DO]daily average minimum≥ 6 mg/Lall year
BOD, 5-day, 20 deg. Cmaximum monthly average≤ 30 mg/LJan, Feb, Mar, Apr, Nov, Dec
BOD, 5-day, 20 deg. Cmaximum monthly average≤ 12 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 weekly average≤ 18 mg/LMay–Oct
BOD, 5-day, 20 deg. Cmaximum monthly average≤ 9 lb/dJan, Feb, Mar, Apr, Nov, Dec
BOD, 5-day, 20 deg. Cmaximum monthly average≤ 3.6 lb/dMay–Oct
BOD, 5-day, 20 deg. Cmaximum weekly average≤ 14 lb/dJan, Feb, Mar, Apr, Nov, Dec
BOD, 5-day, 20 deg. Cmaximum weekly average≤ 5.4 lb/dMay–Oct
pHminimum≥ 6.5 SUall year
pHmaximum≤ 8.5 SUall year
Solids, total suspendedmaximum monthly average≤ 12 mg/LMay–Oct
Solids, total suspendedmaximum monthly average≤ 30 mg/LJan, Feb, Mar, Apr, Nov, Dec
Solids, total suspendedmaximum weekly average≤ 18 mg/LMay–Oct
Solids, total suspendedmaximum weekly average≤ 45 mg/LJan, Feb, Mar, Apr, Nov, Dec
Solids, total suspendedmaximum monthly average≤ 3.6 lb/dMay–Oct
Solids, total suspendedmaximum monthly average≤ 9 lb/dJan, Feb, Mar, Apr, Nov, Dec
Solids, total suspendedmaximum weekly average≤ 5.4 lb/dMay–Oct
Solids, total suspendedmaximum weekly average≤ 14 lb/dJan, Feb, Mar, Apr, Nov, Dec
Solids, total suspendedannual maximumreport only (lb/yr)all year
Solids, total suspendedmonthly totalreport only (lb/mo)all year
Nitrogen, ammonia total [as N]maximum monthly average≤ 1 mg/LMay–Oct
Nitrogen, ammonia total [as N]maximum monthly average≤ 1.8 mg/LJan, Feb, Mar, Apr, Nov, Dec
Nitrogen, ammonia total [as N]maximum daily average≤ 4 mg/LMay–Oct
Nitrogen, ammonia total [as N]maximum daily average≤ 3.6 mg/LJan, Feb, Mar, Apr, Nov, Dec
Nitrogen, ammonia total [as N]maximum monthly average≤ .3 lb/dMay–Oct
Nitrogen, ammonia total [as N]maximum monthly average≤ .5 lb/dJan, Feb, Mar, Apr, Nov, Dec
Nitrogen, ammonia total [as N]maximum daily average≤ 1.2 lb/dMay–Oct
Nitrogen, ammonia total [as N]maximum daily average≤ 1.1 lb/dJan, Feb, Mar, Apr, Nov, Dec
Phosphorus, total [as P]monthly totalreport only (lb/mo)all year
Phosphorus, total [as P]annual maximumreport only (lb/yr)all year
Phosphorus, total [as P]monthly averagereport only (mg/L)all year
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year
Chlorine, total residualmaximum≤ .1 mg/Lall 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.

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/MD0022683 · MCP: https://passage-data.com/mcp