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Greenfield city of

Sewage treatment plant, Greenfield, Minnesota. NPDES permit MN0063762, in force until Jun 30, 2031. Last 12 months: over a limit once (last May 2026). Source: EPA ECHO, Oct 22, 2026.

Reports due
About 47 days after each period: outfall D002 form A1 monthly (25 values), outfall D002 form A2 monthly (2 values), outfall S003 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 40 reports late

Last 12 months (Oct 1, 2025 – Sep 30, 2026)

Period endingParameterReportedLimitOver by
May 2026Coliform, fecal MPN + membrane ftl 44.5 C, monthly geometric mean236≤ 200 #/100mL18%

Limits in force (47)

ParameterStatisticLimitMonthsOutfall
Oxygen, dissolved [DO]monthly minimumreport only (mg/L)all yearD002
pHmonthly minimum≥ 6 SUall yearD002
pHmonthly maximum≤ 9 SUall yearD002
Solids, total suspendedmonthly average≤ 30 mg/Lall yearD002
Solids, total suspendedmaximum weekly average≤ 45 mg/Lall yearD002
Solids, total suspendedmonthly average≤ 11.3 kg/dall yearD002
Solids, total suspendedmaximum weekly average≤ 17 kg/dall yearD002
Nitrogen, total [as N]quarterly averagereport only (mg/L)Mar, Jun, Sep, DecD002
Nitrogen, ammonia total [as N]monthly averagereport only (mg/L)Mar, SepD002
Nitrogen, Kjeldahl, total [as N]quarterly averagereport only (mg/L)Mar, Jun, Sep, DecD002
Nitrite + Nitrate total [as N]monthly averagereport only (mg/L)Mar, Jun, Sep, DecD002
Phosphorus, total [as P]monthly averagereport only (mg/L)Jan, Feb, Mar, Apr, May, Oct, Nov, DecD002
Phosphorus, total [as P]monthly averagereport only (mg/L)Jun–SepD002
Phosphorus, total [as P]12-month average≤ 1 mg/Lall yearD002
Phosphorus, total [as P]monthly averagereport only (kg/d)Jan, Feb, Mar, Apr, May, Oct, Nov, DecD002
Phosphorus, total [as P]monthly average≤ .26 kg/dJun–SepD002
Phosphorus, total [as P]annual total≤ 138 kg/yrall yearD002
Sulfate, total [as SO4]quarterly maximumreport only (mg/L)Mar, Jun, Sep, DecD002
Coliform, fecal MPN + membrane ftl 44.5 Cmonthly geometric mean≤ 200 #/100mLApr–OctD002
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all yearD002
Flow, in conduit or thru treatment plantmonthly maximumreport only (MGD)all yearD002
Flow, in conduit or thru treatment plantmonthly totalreport only (Mgal/mo)all yearD002
Solids, total dissolvedmonthly averagereport only (mg/L)Mar, SepD002
BOD, carbonaceous [5 day, 20 C]monthly average≤ 25 mg/LApr–NovD002
BOD, carbonaceous [5 day, 20 C]monthly average≤ 15 mg/LJan, Feb, Mar, DecD002
BOD, carbonaceous [5 day, 20 C]maximum weekly average≤ 40 mg/LApr–NovD002
BOD, carbonaceous [5 day, 20 C]maximum weekly average≤ 25 mg/LJan, Feb, Mar, DecD002
BOD, carbonaceous [5 day, 20 C]monthly average≤ 9.5 kg/dApr–NovD002
BOD, carbonaceous [5 day, 20 C]monthly average≤ 5.7 kg/dJan, Feb, Mar, DecD002
BOD, carbonaceous [5 day, 20 C]maximum weekly average≤ 15.1 kg/dApr–NovD002
BOD, carbonaceous [5 day, 20 C]maximum weekly average≤ 9.5 kg/dJan, Feb, Mar, DecD002
BOD, carb-5 day, 20 deg C, percent removalmonthly average minimum≥ 85 %all yearD002
Solids, suspended percent removalmonthly average minimum≥ 85 %all yearD002
Precipitation, total defined period/inmonthly totalreport only (in)all yearS003
pHmonthly minimumreport only (SU)all yearS003
pHmonthly maximumreport only (SU)all yearS003
Solids, total suspendedmonthly averagereport only (mg/L)all yearS003
Solids, total suspendedmonthly maximumreport only (mg/L)all yearS003
Nitrogen, total [as N]quarterly averagereport only (mg/L)Mar, Jun, Sep, DecS003
Nitrogen, Kjeldahl, total [as N]quarterly averagereport only (mg/L)Mar, Jun, Sep, DecS003
Nitrite + Nitrate total [as N]quarterly averagereport only (mg/L)Mar, Jun, Sep, DecS003
Phosphorus, total [as P]monthly averagereport only (mg/L)all yearS003
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]monthly averagereport only (mg/L)all yearS003
BOD, carbonaceous [5 day, 20 C]monthly maximumreport only (mg/L)all yearS003

How strict are these limits?

Cited limits by parameter: Minnesota's rules and the federal ones.

Check this month's numbers Email me before each report is due

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On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/MN0063762 · MCP: https://passage-data.com/mcp