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Saint Leo city of

Sewage treatment plant, Saint Leo, Minnesota. NPDES permit MN0024775 expired May 31, 2026; 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 D004 form A1 monthly (20 values), outfall D004 form A2 monthly (1 value), outfall S005 form A1 monthly (11 values)
Last report on file
August 2026
Oct 2024 – Sep 2025
1 value over a limit, 0 required values missing, 0 of 36 reports late

Limits in force (35)

ParameterStatisticLimitMonthsOutfall
Oxygen, dissolved [DO]monthly minimumreport only (mg/L)all yearD004
pHmonthly minimum≥ 6 SUall yearD004
pHmonthly maximum≤ 9 SUall yearD004
Solids, total suspendedmonthly average≤ 45 mg/Lall yearD004
Solids, total suspendedmaximum weekly average≤ 65 mg/Lall yearD004
Solids, total suspendedmonthly average≤ 24 kg/dall yearD004
Solids, total suspendedmaximum weekly average≤ 35 kg/dall yearD004
Nitrogen, total [as N]monthly averagereport only (mg/L)all yearD004
Nitrogen, Kjeldahl, total [as N]monthly averagereport only (mg/L)all yearD004
Nitrite + Nitrate total [as N]monthly averagereport only (mg/L)all yearD004
Phosphorus, total [as P]monthly averagereport only (mg/L)all yearD004
Phosphorus, total [as P]monthly averagereport only (kg/d)all yearD004
Phosphorus, total [as P]year-to-date total≤ 47 kg/yrall yearD004
Coliform, fecal MPN + membrane ftl 44.5 Cmonthly geometric mean≤ 200 #/100mLApr–OctD004
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)Jan, Feb, Jul, AugD004
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)Mar, Apr, May, Jun, Sep, Oct, Nov, DecD004
Flow, in conduit or thru treatment plantmonthly maximumreport only (MGD)Jan, Feb, Jul, AugD004
Flow, in conduit or thru treatment plantmonthly maximumreport only (MGD)Mar, Apr, May, Jun, Sep, Oct, Nov, DecD004
Flow, in conduit or thru treatment plantmonthly totalreport only (Mgal/mo)Jan, Feb, Jul, AugD004
Flow, in conduit or thru treatment plantmonthly totalreport only (Mgal/mo)Mar, Apr, May, Jun, Sep, Oct, Nov, DecD004
BOD, carbonaceous [5 day, 20 C]monthly average≤ 25 mg/Lall yearD004
BOD, carbonaceous [5 day, 20 C]maximum weekly average≤ 40 mg/Lall yearD004
BOD, carbonaceous [5 day, 20 C]monthly average≤ 13 kg/dall yearD004
BOD, carbonaceous [5 day, 20 C]maximum weekly average≤ 21 kg/dall yearD004
Precipitation, total defined period/inmonthly totalreport only (in)all yearS005
pHquarterly maximumreport only (SU)Mar, Jun, Sep, DecS005
Solids, total suspendedquarterly averagereport only (mg/L)Mar, Jun, Sep, DecS005
Nitrogen, total [as N]monthly averagereport only (mg/L)Mar, SepS005
Nitrogen, Kjeldahl, total [as N]monthly averagereport only (mg/L)Mar, SepS005
Nitrite + Nitrate total [as N]monthly averagereport only (mg/L)Mar, SepS005
Phosphorus, total [as P]quarterly averagereport only (mg/L)Mar, Jun, Sep, DecS005
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all yearS005
Flow, in conduit or thru treatment plantmonthly maximumreport only (MGD)all yearS005
Flow, in conduit or thru treatment plantmonthly totalreport only (Mgal/mo)all yearS005
BOD, carbonaceous [5 day, 20 C]quarterly averagereport only (mg/L)Mar, Jun, Sep, DecS005

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/MN0024775 · MCP: https://passage-data.com/mcp