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Beaver Bay city of

Sewage treatment plant, Beaver Bay, Minnesota. NPDES permit MN0040754 expired Dec 31, 2025; its limits still apply. Last 12 months: no values over a limit, 170 required values missing. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 47 days after each period: outfall D002 form A1 monthly (23 values), outfall S003 form A1 monthly (11 values)
Last report on file
September 2026
Oct 2024 – Sep 2025
2 values over a limit, 18 required values missing, 0 of 24 reports late

Limits in force (45)

ParameterStatisticLimitMonthsOutfall
Oxygen, dissolved [DO]daily minimum≥ 7 mg/LApr–NovD002
pHmonthly minimum≥ 6 SUall yearD002
pHmonthly maximum≤ 9 SUall yearD002
Solids, total suspendedmonthly average≤ 45 mg/Lall yearD002
Solids, total suspendedmaximum weekly average≤ 65 mg/Lall yearD002
Solids, total suspendedmonthly average≤ 44.4 kg/dall yearD002
Solids, total suspendedmaximum weekly average≤ 64 kg/dall yearD002
Nitrogen, total [as N]monthly averagereport only (mg/L)all yearD002
Nitrogen, ammonia total [as N]monthly average≤ 9.7 mg/LSep–NovD002
Nitrogen, ammonia total [as N]monthly averagereport only (mg/L)Apr–JunD002
Nitrogen, ammonia total [as N]monthly average≤ 2.2 mg/LJul, AugD002
Nitrogen, ammonia total [as N]monthly average≤ 9.6 kg/dSep–NovD002
Nitrogen, ammonia total [as N]monthly averagereport only (kg/d)Apr–JunD002
Nitrogen, ammonia total [as N]monthly average≤ 2.2 kg/dJul, AugD002
Nitrogen, Kjeldahl, total [as N]monthly averagereport only (mg/L)all yearD002
Nitrite + Nitrate total [as N]monthly averagereport only (mg/L)all yearD002
Phosphorus, total [as P]monthly average≤ 1 mg/LApr–NovD002
Phosphorus, total [as P]monthly averagereport only (kg/d)Apr–NovD002
Coliform, fecal MPN + membrane ftl 44.5 Cmonthly geometric mean≤ 200 #/100mLall yearD002
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)Jan, Feb, Mar, DecD002
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)Apr–NovD002
Flow, in conduit or thru treatment plantmonthly maximumreport only (MGD)Jan, Feb, Mar, DecD002
Flow, in conduit or thru treatment plantmonthly maximumreport only (MGD)Apr–NovD002
Flow, in conduit or thru treatment plantmonthly totalreport only (Mgal/mo)Jan, Feb, Mar, DecD002
Flow, in conduit or thru treatment plantmonthly totalreport only (Mgal/mo)Apr–NovD002
Chlorine, total residualdaily maximum≤ .038 mg/LApr–NovD002
BOD, carbonaceous [5 day, 20 C]monthly average≤ 25 mg/LApr–JunD002
BOD, carbonaceous [5 day, 20 C]monthly average≤ 10 mg/LJul–NovD002
BOD, carbonaceous [5 day, 20 C]maximum weekly average≤ 40 mg/LApr–JunD002
BOD, carbonaceous [5 day, 20 C]maximum weekly average≤ 16 mg/LJul–NovD002
BOD, carbonaceous [5 day, 20 C]monthly average≤ 24.7 kg/dApr–JunD002
BOD, carbonaceous [5 day, 20 C]monthly average≤ 9.9 kg/dJul–NovD002
BOD, carbonaceous [5 day, 20 C]maximum weekly average≤ 39.4 kg/dApr–JunD002
BOD, carbonaceous [5 day, 20 C]maximum weekly average≤ 15.8 kg/dJul–NovD002
Precipitation, total defined period/inmonthly totalreport only (in)all yearS003
pHquarterly maximumreport only (SU)Mar, Jun, Sep, DecS003
Solids, total suspendedquarterly averagereport only (mg/L)Mar, Jun, Sep, DecS003
Nitrogen, total [as N]monthly averagereport only (mg/L)Mar, SepS003
Nitrogen, Kjeldahl, total [as N]monthly averagereport only (mg/L)Mar, SepS003
Nitrite + Nitrate total [as N]monthly averagereport only (mg/L)Mar, SepS003
Phosphorus, total [as P]quarterly averagereport only (mg/L)Mar, Jun, Sep, DecS003
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all yearS003
Flow, in conduit or thru treatment plantmonthly maximumreport only (MGD)all yearS003
Flow, in conduit or thru treatment plantmonthly totalreport only (Mgal/mo)all yearS003
BOD, carbonaceous [5 day, 20 C]quarterly averagereport only (mg/L)Mar, Jun, Sep, DecS003

How strict are these limits?

Cited limits by parameter: Minnesota'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/MN0040754 · MCP: https://passage-data.com/mcp