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Fergus Falls city of

Sewage treatment plant, major discharger, Fergus Falls, Minnesota. NPDES permit MN0050628, in force until Aug 31, 2028. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 47 days after each period: outfall D045 form A1 monthly (30 values), outfall D045 form A2 monthly (1 value), outfall S048 form A1 monthly (14 values)
Renewal application due
Mar 4, 2028 · 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 26 reports late

Limits in force (46)

ParameterStatisticLimitMonthsOutfall
Oxygen, dissolved [DO]monthly minimumreport only (mg/L)all yearD045
pHmonthly minimum≥ 6 SUall yearD045
pHmonthly maximum≤ 9 SUall yearD045
Solids, total suspendedmonthly average≤ 30 mg/Lall yearD045
Solids, total suspendedmaximum weekly average≤ 45 mg/Lall yearD045
Solids, total suspendedmonthly maximumreport only (mg/L)May, SepD045
Solids, total suspendedmonthly average≤ 318.7 kg/dall yearD045
Solids, total suspendedmaximum weekly average≤ 478 kg/dall yearD045
Nitrogen, total [as N]monthly averagereport only (mg/L)all yearD045
Nitrogen, ammonia total [as N]monthly averagereport only (mg/L)Jan, Feb, Mar, Apr, May, Oct, Nov, DecD045
Nitrogen, ammonia total [as N]monthly average≤ 4.3 mg/LJun–SepD045
Nitrogen, ammonia total [as N]monthly average≤ 45.7 kg/dJun–SepD045
Nitrogen, Kjeldahl, total [as N]monthly averagereport only (mg/L)all yearD045
Nitrite + Nitrate total [as N]monthly averagereport only (mg/L)all yearD045
Phosphorus, total [as P]monthly average≤ 1 mg/Lall yearD045
Phosphorus, total [as P]monthly average≤ 10.6 kg/dall yearD045
Sulfate, total [as SO4]quarterly averagereport only (mg/L)Mar, Jun, Sep, DecD045
Arsenic, total [as As]monthly averagereport only (ug/L)Apr, SepD045
Coliform, fecal MPN + membrane ftl 44.5 Cmonthly geometric mean≤ 200 #/100mLApr–OctD045
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all yearD045
Flow, in conduit or thru treatment plantmonthly maximumreport only (MGD)all yearD045
Flow, in conduit or thru treatment plantmonthly totalreport only (Mgal/mo)all yearD045
Chlorine, total residualdaily maximum≤ .038 mg/LApr–OctD045
Solids, total dissolvedmonthly averagereport only (mg/L)Mar, SepD045
Mercury, dissolved [as Hg]monthly maximumreport only (ng/L)May, SepD045
Mercury, total [as Hg]monthly maximumreport only (ng/L)May, SepD045
BOD, carbonaceous [5 day, 20 C]monthly average≤ 25 mg/Lall yearD045
BOD, carbonaceous [5 day, 20 C]maximum weekly average≤ 40 mg/Lall yearD045
BOD, carbonaceous [5 day, 20 C]monthly average≤ 265.5 kg/dall yearD045
BOD, carbonaceous [5 day, 20 C]maximum weekly average≤ 424.9 kg/dall yearD045
BOD, carb-5 day, 20 deg C, percent removalmonthly average minimum≥ 85 %all yearD045
Solids, suspended percent removalmonthly average minimum≥ 85 %all yearD045
Precipitation, total defined period/inmonthly totalreport only (in)all yearS048
pHmonthly minimumreport only (SU)all yearS048
pHmonthly maximumreport only (SU)all yearS048
Solids, total suspendedmonthly averagereport only (mg/L)all yearS048
Solids, total suspendedmonthly maximumreport only (mg/L)all yearS048
Nitrogen, total [as N]monthly averagereport only (mg/L)all yearS048
Nitrogen, Kjeldahl, total [as N]monthly averagereport only (mg/L)all yearS048
Nitrite + Nitrate total [as N]monthly averagereport only (mg/L)all yearS048
Phosphorus, total [as P]monthly averagereport only (mg/L)all yearS048
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all yearS048
Flow, in conduit or thru treatment plantmonthly maximumreport only (MGD)all yearS048
Flow, in conduit or thru treatment plantmonthly totalreport only (Mgal/mo)all yearS048
BOD, carbonaceous [5 day, 20 C]monthly averagereport only (mg/L)all yearS048
BOD, carbonaceous [5 day, 20 C]monthly maximumreport only (mg/L)all yearS048

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/MN0050628 · MCP: https://passage-data.com/mcp