U.S Army Corps of Engineers — NPDES permit MD0020206: limits, due date and EPA's record

Federal facility (Sewerage Systems), Chesapeake City, Maryland. NPDES permit MD0020206 expired Jul 31, 2026; its limits still apply. Last 12 months: over a limit 2 times (last November 2025). Source: EPA ECHO, Oct 22, 2026.

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

Period ending	Parameter	Reported	Limit	Over by
November 2025	BOD, 5-day, 20 deg. C, maximum monthly average	60 mg/L	≤ 30 mg/L	100%
November 2025	BOD, 5-day, 20 deg. C, maximum weekly average	60 mg/L	≤ 45 mg/L	33%

Limits in force (17)

Parameter	Statistic	Limit	Months
Oxygen, dissolved [DO]	instantaneous minimum	≥ 5 mg/L	all year
Oxygen, dissolved [DO]	minimum weekly average	≥ 6 mg/L	Feb–May
Oxygen, dissolved [DO]	monthly average minimum	≥ 5.5 mg/L	Jan, Jun, Jul, Aug, Sep, Oct, Nov, Dec
BOD, 5-day, 20 deg. C	maximum monthly average	≤ 30 mg/L	all year
BOD, 5-day, 20 deg. C	maximum weekly average	≤ 45 mg/L	all year
BOD, 5-day, 20 deg. C	maximum monthly average	≤ .5 lb/d	all year
BOD, 5-day, 20 deg. C	maximum weekly average	≤ .8 lb/d	all year
pH	minimum	≥ 6.5 SU	all year
pH	maximum	≤ 8.5 SU	all year
Solids, total suspended	maximum monthly average	≤ 30 mg/L	all year
Solids, total suspended	maximum weekly average	≤ 45 mg/L	all year
Solids, total suspended	maximum monthly average	≤ .5 lb/d	all year
Solids, total suspended	maximum weekly average	≤ .8 lb/d	all year
Flow, in conduit or thru treatment plant	monthly average	report only (MGD)	all year
Flow, in conduit or thru treatment plant	daily maximum	report only (MGD)	all year
Chlorine, total residual	maximum	≤ .1 mg/L	all year
E. coli	maximum monthly geometric mean	≤ 126 MPN/100mL	all year

How strict are these limits?

Your permit document is the final word. As JSON: /api/v1/permits/MD0020206 · MCP: https://passage-data.com/mcp