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Granite Falls city of

Sewage treatment plant, Granite Falls, Minnesota. NPDES permit MN0021211, in force until Dec 31, 2027. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 47 days after each period: outfall D032 form A1 monthly (24 values), outfall D032 form A3 monthly (2 values), outfall S036 form A1 monthly (14 values)
Renewal application due
Jul 4, 2027 · 180 days before expiry; your permit may set another date
Last report on file
September 2026
Oct 2024 – Sep 2025
3 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 yearD032
pHmonthly minimum≥ 6 SUall yearD032
pHmonthly maximum≤ 9 SUall yearD032
Solids, total suspendedmonthly average≤ 30 mg/Lall yearD032
Solids, total suspendedmonthly maximumreport only (mg/L)JulD032
Solids, total suspendedmaximum weekly average≤ 45 mg/Lall yearD032
Solids, total suspendedmonthly average≤ 91 kg/dall yearD032
Solids, total suspendedmaximum weekly average≤ 136 kg/dall yearD032
Nitrogen, total [as N]quarterly averagereport only (mg/L)Mar, Jun, Sep, DecD032
Nitrogen, ammonia total [as N]monthly averagereport only (mg/L)Mar, SepD032
Nitrogen, Kjeldahl, total [as N]quarterly averagereport only (mg/L)Mar, Jun, Sep, DecD032
Nitrite + Nitrate total [as N]quarterly averagereport only (mg/L)Mar, Jun, Sep, DecD032
Phosphorus, total [as P]monthly averagereport only (mg/L)Jan, Feb, Mar, Apr, May, Oct, Nov, DecD032
Phosphorus, total [as P]monthly averagereport only (mg/L)Jun–SepD032
Phosphorus, total [as P]monthly averagereport only (kg/d)Jan, Feb, Mar, Apr, May, Oct, Nov, DecD032
Phosphorus, total [as P]monthly average≤ 4 kg/dJun–SepD032
Phosphorus, total [as P]annual total≤ 1105 kg/yrall yearD032
Coliform, fecal MPN + membrane ftl 44.5 Cmonthly geometric mean≤ 200 #/100mLApr–OctD032
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all yearD032
Flow, in conduit or thru treatment plantmonthly maximumreport only (MGD)all yearD032
Flow, in conduit or thru treatment plantmonthly totalreport only (Mgal/mo)all yearD032
Chlorine, total residualdaily maximum≤ .038 mg/LApr–OctD032
Solids, total dissolvedmonthly averagereport only (mg/L)Mar, SepD032
Mercury, dissolved [as Hg]monthly maximumreport only (ng/L)JulD032
Mercury, total [as Hg]monthly maximumreport only (ng/L)JulD032
BOD, carbonaceous [5 day, 20 C]monthly average≤ 25 mg/Lall yearD032
BOD, carbonaceous [5 day, 20 C]maximum weekly average≤ 40 mg/Lall yearD032
BOD, carbonaceous [5 day, 20 C]monthly average≤ 76 kg/dall yearD032
BOD, carbonaceous [5 day, 20 C]maximum weekly average≤ 121 kg/dall yearD032
BOD, carb-5 day, 20 deg C, percent removalmonthly average minimum≥ 85 %all yearD032
Solids, suspended percent removalmonthly average minimum≥ 85 %all yearD032
Precipitation, total defined period/inmonthly totalreport only (in)all yearS036
pHmonthly minimumreport only (SU)all yearS036
pHmonthly maximumreport only (SU)all yearS036
Solids, total suspendedmonthly averagereport only (mg/L)all yearS036
Solids, total suspendedmonthly maximumreport only (mg/L)all yearS036
Nitrogen, total [as N]quarterly averagereport only (mg/L)Mar, Jun, Sep, DecS036
Nitrogen, Kjeldahl, total [as N]quarterly averagereport only (mg/L)Mar, Jun, Sep, DecS036
Nitrite + Nitrate total [as N]quarterly averagereport only (mg/L)Mar, Jun, Sep, DecS036
Phosphorus, total [as P]monthly averagereport only (mg/L)all yearS036
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all yearS036
Flow, in conduit or thru treatment plantmonthly maximumreport only (MGD)all yearS036
Flow, in conduit or thru treatment plantmonthly totalreport only (Mgal/mo)all yearS036
BOD, carbonaceous [5 day, 20 C]monthly averagereport only (mg/L)all yearS036
BOD, carbonaceous [5 day, 20 C]monthly maximumreport only (mg/L)all yearS036

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/MN0021211 · MCP: https://passage-data.com/mcp