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Saint Peter city of

Sewage treatment plant, major discharger, Saint Peter, Minnesota. NPDES permit MN0022535, in force until Mar 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 D047 form A1 monthly (38 values), outfall D047 form A2 monthly (3 values), outfall D047 form A3 monthly (1 value), outfall S050 form A1 monthly (15 values)
Renewal application due
Oct 2, 2026 · 180 days before expiry; your permit may set another date
Last report on file
August 2026
Oct 2024 – Sep 2025
0 values over a limit, 0 required values missing, 0 of 48 reports late

Limits in force (62)

ParameterStatisticLimitMonthsOutfall
Specific conductancequarterly maximumreport only (umho/cm)Mar, Jun, Sep, DecD047
Oxygen, dissolved [DO]monthly minimum≥ 5 mg/Lall yearD047
pHmonthly minimum≥ 6 SUall yearD047
pHmonthly maximum≤ 9 SUall yearD047
Bicarbonate ion- [as HCO3]quarterly maximumreport only (mg/L)Mar, Jun, Sep, DecD047
Solids, total suspendedmonthly averagereport only (mg/L)Jan, Mar, May, Jul, Sep, NovD047
Solids, total suspendedmonthly average≤ 30 mg/Lall yearD047
Solids, total suspendeddaily maximumreport only (mg/L)Jan, Mar, May, Jul, Sep, NovD047
Solids, total suspendedmaximum weekly average≤ 45 mg/Lall yearD047
Solids, total suspendedmonthly average≤ 454 kg/dall yearD047
Solids, total suspendedmaximum weekly average≤ 680 kg/dall yearD047
Nitrogen, total [as N]monthly averagereport only (mg/L)all yearD047
Nitrogen, ammonia total [as N]monthly averagereport only (mg/L)all yearD047
Nitrogen, Kjeldahl, total [as N]monthly averagereport only (mg/L)all yearD047
Nitrite + Nitrate total [as N]monthly averagereport only (mg/L)all yearD047
Phosphorus, total [as P]monthly average≤ 1 mg/Lall yearD047
Phosphorus, total [as P]monthly averagereport only (kg/d)Jan, Feb, Mar, Apr, May, Oct, Nov, DecD047
Phosphorus, total [as P]monthly average≤ 11.8 kg/dJun–SepD047
Phosphorus, total [as P]annual total≤ 4421 kg/yrall yearD047
Calcium, total [as Ca]quarterly maximumreport only (mg/L)Mar, Jun, Sep, DecD047
Magnesium, total [as Mg]quarterly maximumreport only (mg/L)Mar, Jun, Sep, DecD047
Sodium, total [as Na]quarterly maximumreport only (mg/L)Mar, Jun, Sep, DecD047
Potassium, total [as K]quarterly maximumreport only (mg/L)Mar, Jun, Sep, DecD047
Chloride [as Cl]quarterly maximumreport only (mg/L)Mar, Jun, Sep, DecD047
Sulfate, total [as SO4]quarterly maximumreport only (mg/L)Mar, Jun, Sep, DecD047
Copper, total [as Cu]quarterly maximumreport only (mg/L)Mar, Jun, Sep, DecD047
Zinc, total [as Zn]quarterly maximumreport only (mg/L)Mar, Jun, Sep, DecD047
Hardness, Ca Mg Calculated [mg/L as CaCO3]quarterly maximumreport only (mg/L)Mar, Jun, Sep, DecD047
Coliform, fecal MPN + membrane ftl 44.5 Cmonthly geometric mean≤ 200 #/100mLApr–OctD047
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all yearD047
Flow, in conduit or thru treatment plantmonthly maximumreport only (MGD)all yearD047
Flow, in conduit or thru treatment plantmonthly totalreport only (Mgal/mo)all yearD047
Solids, total dissolvedquarterly maximumreport only (mg/L)Mar, Jun, Sep, DecD047
Mercury, dissolved [as Hg]monthly averagereport only (ng/L)Jan, Mar, May, Jul, Sep, NovD047
Mercury, dissolved [as Hg]daily maximumreport only (ng/L)Jan, Mar, May, Jul, Sep, NovD047
Mercury, total [as Hg]monthly average≤ 10.2 ng/LJan, Mar, May, Jul, Sep, NovD047
Mercury, total [as Hg]daily maximum≤ 19.3 ng/LJan, Mar, May, Jul, Sep, NovD047
BOD, carbonaceous [5 day, 20 C]monthly average≤ 25 mg/LApr–NovD047
BOD, carbonaceous [5 day, 20 C]monthly average≤ 15 mg/LJan, Feb, Mar, DecD047
BOD, carbonaceous [5 day, 20 C]maximum weekly average≤ 40 mg/LApr–NovD047
BOD, carbonaceous [5 day, 20 C]maximum weekly average≤ 25 mg/LJan, Feb, Mar, DecD047
BOD, carbonaceous [5 day, 20 C]monthly average≤ 378 kg/dApr–NovD047
BOD, carbonaceous [5 day, 20 C]monthly average≤ 227 kg/dJan, Feb, Mar, DecD047
BOD, carbonaceous [5 day, 20 C]maximum weekly average≤ 605 kg/dApr–NovD047
BOD, carbonaceous [5 day, 20 C]maximum weekly average≤ 378 kg/dJan, Feb, Mar, DecD047
BOD, carb-5 day, 20 deg C, percent removalmonthly average minimum≥ 85 %all yearD047
Solids, suspended percent removalmonthly average minimum≥ 85 %all yearD047
Precipitation, total defined period/inmonthly totalreport only (in)all yearS050
pHmonthly minimumreport only (SU)all yearS050
pHmonthly maximumreport only (SU)all yearS050
Solids, total suspendedmonthly averagereport only (mg/L)all yearS050
Solids, total suspendedmonthly maximumreport only (mg/L)all yearS050
Nitrogen, total [as N]monthly averagereport only (mg/L)all yearS050
Nitrogen, Kjeldahl, total [as N]monthly averagereport only (mg/L)all yearS050
Nitrite + Nitrate total [as N]monthly averagereport only (mg/L)all yearS050
Phosphorus, total [as P]monthly averagereport only (mg/L)all yearS050
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all yearS050
Flow, in conduit or thru treatment plantmonthly maximumreport only (MGD)all yearS050
Flow, in conduit or thru treatment plantmonthly totalreport only (Mgal/mo)all yearS050
Mercury, total [as Hg]monthly averagereport only (ng/L)Jan, Mar, May, Jul, Sep, NovS050
BOD, carbonaceous [5 day, 20 C]monthly averagereport only (mg/L)all yearS050
BOD, carbonaceous [5 day, 20 C]monthly maximumreport only (mg/L)all yearS050

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/MN0022535 · MCP: https://passage-data.com/mcp