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North Branch city of

Sewage treatment plant, North Branch, Minnesota. NPDES permit MN0024350 expired Apr 30, 2025; its limits still apply. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 47 days after each period: outfall D014 form A1 monthly (26 values), outfall D014 form A3 monthly (1 value), outfall S015 form A1 monthly (14 values)
Last report on file
August 2026
Oct 2024 – Sep 2025
0 values over a limit, 0 required values missing, 0 of 37 reports late

Limits in force (45)

ParameterStatisticLimitMonthsOutfall
Oxygen, dissolved [DO]monthly minimumreport only (mg/L)all yearD014
pHmonthly minimum≥ 6 SUall yearD014
pHmonthly maximum≤ 9 SUall yearD014
Solids, total suspendedmonthly average≤ 30 mg/Lall yearD014
Solids, total suspendedmonthly maximumreport only (mg/L)JulD014
Solids, total suspendedmaximum weekly average≤ 45 mg/Lall yearD014
Solids, total suspendedmonthly average≤ 92 kg/dall yearD014
Solids, total suspendedmaximum weekly average≤ 138 kg/dall yearD014
Nitrogen, total [as N]quarterly averagereport only (mg/L)Mar, Jun, Sep, DecD014
Nitrogen, ammonia total [as N]monthly average≤ 7.6 mg/LJun–SepD014
Nitrogen, ammonia total [as N]monthly averagereport only (mg/L)MarD014
Nitrogen, ammonia total [as N]monthly average≤ 23 kg/dJun–SepD014
Nitrogen, Kjeldahl, total [as N]quarterly averagereport only (mg/L)Mar, Jun, Sep, DecD014
Nitrite + Nitrate total [as N]quarterly averagereport only (mg/L)Mar, Jun, Sep, DecD014
Phosphorus, total [as P]monthly averagereport only (mg/L)all yearD014
Phosphorus, total [as P]12-month average≤ 1 mg/Lall yearD014
Phosphorus, total [as P]annual total≤ 1120 kg/yrall yearD014
Coliform, fecal MPN + membrane ftl 44.5 Cmonthly geometric mean≤ 200 #/100mLApr–OctD014
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all yearD014
Flow, in conduit or thru treatment plantmonthly maximumreport only (MGD)all yearD014
Flow, in conduit or thru treatment plantmonthly totalreport only (Mgal/mo)all yearD014
Chlorine, total residualdaily maximum≤ .038 mg/Lall yearD014
Solids, total dissolvedmonthly averagereport only (mg/L)Mar, SepD014
Mercury, dissolved [as Hg]monthly maximumreport only (ng/L)JulD014
Mercury, total [as Hg]monthly maximumreport only (ng/L)JulD014
BOD, carbonaceous [5 day, 20 C]monthly average≤ 25 mg/Lall yearD014
BOD, carbonaceous [5 day, 20 C]maximum weekly average≤ 40 mg/Lall yearD014
BOD, carbonaceous [5 day, 20 C]monthly average≤ 77 kg/dall yearD014
BOD, carbonaceous [5 day, 20 C]maximum weekly average≤ 123 kg/dall yearD014
BOD, carb-5 day, 20 deg C, percent removalmonthly average minimum≥ 85 %all yearD014
Solids, suspended percent removalmonthly average minimum≥ 85 %all yearD014
Precipitation, total defined period/inmonthly totalreport only (in)all yearS015
pHmonthly minimumreport only (SU)all yearS015
pHmonthly maximumreport only (SU)all yearS015
Solids, total suspendedmonthly averagereport only (mg/L)all yearS015
Solids, total suspendedmonthly maximumreport only (mg/L)all yearS015
Nitrogen, total [as N]quarterly averagereport only (mg/L)Mar, Jun, Sep, DecS015
Nitrogen, Kjeldahl, total [as N]quarterly averagereport only (mg/L)Mar, Jun, Sep, DecS015
Nitrite + Nitrate total [as N]quarterly averagereport only (mg/L)Mar, Jun, Sep, DecS015
Phosphorus, total [as P]monthly averagereport only (mg/L)all yearS015
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all yearS015
Flow, in conduit or thru treatment plantmonthly maximumreport only (MGD)all yearS015
Flow, in conduit or thru treatment plantmonthly totalreport only (Mgal/mo)all yearS015
BOD, carbonaceous [5 day, 20 C]monthly averagereport only (mg/L)all yearS015
BOD, carbonaceous [5 day, 20 C]monthly maximumreport only (mg/L)all yearS015

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/MN0024350 · MCP: https://passage-data.com/mcp