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Little Falls city of

Sewage treatment plant, major discharger, Little Falls, Minnesota. NPDES permit MN0020761, in force until Nov 30, 2027. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 47 days after each period: outfall D025 form A1 monthly (26 values), outfall D025 form A2 monthly (1 value), outfall D025 form A3 monthly (1 value), outfall S026 form A1 monthly (14 values)
Renewal application due
Jun 3, 2027 · 180 days before expiry; your permit may set another date
Last report on file
September 2026
Oct 2024 – Sep 2025
0 values over a limit, 0 required values missing, 0 of 38 reports late

Limits in force (42)

ParameterStatisticLimitMonthsOutfall
Oxygen, dissolved [DO]monthly minimumreport only (mg/L)all yearD025
pHmonthly minimum≥ 6 SUall yearD025
pHmonthly maximum≤ 9 SUall yearD025
Solids, total suspendedmonthly average≤ 30 mg/Lall yearD025
Solids, total suspendedmonthly maximumreport only (mg/L)May, SepD025
Solids, total suspendedmaximum weekly average≤ 45 mg/Lall yearD025
Solids, total suspendedmonthly average≤ 272 kg/dall yearD025
Solids, total suspendedmaximum weekly average≤ 408 kg/dall yearD025
Nitrogen, total [as N]monthly averagereport only (mg/L)all yearD025
Nitrogen, ammonia total [as N]monthly averagereport only (mg/L)all yearD025
Nitrogen, Kjeldahl, total [as N]monthly averagereport only (mg/L)all yearD025
Nitrite + Nitrate total [as N]monthly averagereport only (mg/L)all yearD025
Phosphorus, total [as P]monthly averagereport only (mg/L)all yearD025
Phosphorus, total [as P]monthly averagereport only (kg/d)all yearD025
Phosphorus, total [as P]annual total≤ 2653 kg/yrall yearD025
Coliform, fecal MPN + membrane ftl 44.5 Cmonthly geometric mean≤ 200 #/100mLApr–OctD025
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all yearD025
Flow, in conduit or thru treatment plantmonthly maximumreport only (MGD)all yearD025
Flow, in conduit or thru treatment plantmonthly totalreport only (Mgal/mo)all yearD025
Solids, total dissolvedmonthly averagereport only (mg/L)Mar, SepD025
Mercury, dissolved [as Hg]monthly maximumreport only (ng/L)May, SepD025
Mercury, total [as Hg]monthly maximumreport only (ng/L)May, SepD025
BOD, carbonaceous [5 day, 20 C]monthly average≤ 25 mg/Lall yearD025
BOD, carbonaceous [5 day, 20 C]maximum weekly average≤ 40 mg/Lall yearD025
BOD, carbonaceous [5 day, 20 C]monthly average≤ 227 kg/dall yearD025
BOD, carbonaceous [5 day, 20 C]maximum weekly average≤ 363 kg/dall yearD025
BOD, carb-5 day, 20 deg C, percent removalmonthly average minimum≥ 85 %all yearD025
Solids, suspended percent removalmonthly average minimum≥ 85 %all yearD025
Precipitation, total defined period/inmonthly totalreport only (in)all yearS026
pHmonthly minimumreport only (SU)all yearS026
pHmonthly maximumreport only (SU)all yearS026
Solids, total suspendedmonthly averagereport only (mg/L)all yearS026
Solids, total suspendedmonthly maximumreport only (mg/L)all yearS026
Nitrogen, total [as N]monthly averagereport only (mg/L)all yearS026
Nitrogen, Kjeldahl, total [as N]monthly averagereport only (mg/L)all yearS026
Nitrite + Nitrate total [as N]monthly averagereport only (mg/L)all yearS026
Phosphorus, total [as P]monthly averagereport only (mg/L)all yearS026
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all yearS026
Flow, in conduit or thru treatment plantmonthly maximumreport only (MGD)all yearS026
Flow, in conduit or thru treatment plantmonthly totalreport only (Mgal/mo)all yearS026
BOD, carbonaceous [5 day, 20 C]monthly averagereport only (mg/L)all yearS026
BOD, carbonaceous [5 day, 20 C]monthly maximumreport only (mg/L)all yearS026

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/MN0020761 · MCP: https://passage-data.com/mcp