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Hector city of

Sewage treatment plant, Hector, Minnesota. NPDES permit MN0025445 expired Sep 30, 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 D022 form A1 monthly (33 values), outfall D022 form A2 monthly (2 values), outfall S026 form A1 monthly (11 values)
Last report on file
July 2026
Oct 2024 – Sep 2025
2 values over a limit, 0 required values missing, 0 of 36 reports late

Limits in force (51)

ParameterStatisticLimitMonthsOutfall
Specific conductancemonthly maximumreport only (umho/cm)all yearD022
Oxygen, dissolved [DO]monthly minimumreport only (mg/L)all yearD022
pHmonthly minimum≥ 6 SUall yearD022
pHmonthly maximum≤ 9 SUall yearD022
Bicarbonate ion- [as HCO3]monthly maximumreport only (mg/L)all yearD022
Solids, total suspendedmonthly average≤ 30 mg/Lall yearD022
Solids, total suspendedmonthly maximumreport only (mg/L)JulD022
Solids, total suspendedmaximum weekly average≤ 45 mg/Lall yearD022
Solids, total suspendedmonthly average≤ 74.8 kg/dall yearD022
Solids, total suspendedmaximum weekly average≤ 112.3 kg/dall yearD022
Nitrogen, total [as N]quarterly averagereport only (mg/L)Mar, Jun, Sep, DecD022
Nitrogen, ammonia total [as N]monthly averagereport only (mg/L)Mar, SepD022
Nitrogen, Kjeldahl, total [as N]quarterly averagereport only (mg/L)Mar, Jun, Sep, DecD022
Nitrite + Nitrate total [as N]quarterly averagereport only (mg/L)Mar, Jun, Sep, DecD022
Phosphorus, total [as P]monthly average≤ .63 mg/LJun–SepD022
Phosphorus, total [as P]monthly averagereport only (mg/L)Jan, Feb, Mar, Apr, May, Oct, Nov, DecD022
Phosphorus, total [as P]monthly totalreport only (kg/mo)Jun–SepD022
Phosphorus, total [as P]monthly totalreport only (kg/mo)Jan, Feb, Mar, Apr, May, Oct, Nov, DecD022
Phosphorus, total [as P]annual total≤ 912 kg/yrall yearD022
Calcium, total [as Ca]monthly maximumreport only (mg/L)all yearD022
Magnesium, total [as Mg]monthly maximumreport only (mg/L)all yearD022
Sodium, total [as Na]monthly maximumreport only (mg/L)all yearD022
Potassium, total [as K]monthly maximumreport only (mg/L)all yearD022
Chloride [as Cl]monthly average≤ 447 mg/LJan, Mar, May, Jul, Sep, NovD022
Chloride [as Cl]daily maximum≤ 743 mg/LJan, Mar, May, Jul, Sep, NovD022
Sulfate, total [as SO4]monthly maximumreport only (mg/L)all yearD022
Hardness, Ca Mg Calculated [mg/L as CaCO3]monthly maximumreport only (mg/L)all yearD022
Coliform, fecal MPN + membrane ftl 44.5 Cmonthly geometric mean≤ 200 #/100mLMay–OctD022
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all yearD022
Flow, in conduit or thru treatment plantmonthly maximumreport only (MGD)all yearD022
Flow, in conduit or thru treatment plantmonthly totalreport only (Mgal/mo)all yearD022
Solids, total dissolvedmonthly maximumreport only (mg/L)all yearD022
Mercury, dissolved [as Hg]monthly maximumreport only (ng/L)JulD022
Mercury, total [as Hg]monthly maximumreport only (ng/L)JulD022
BOD, carbonaceous [5 day, 20 C]monthly average≤ 15 mg/Lall yearD022
BOD, carbonaceous [5 day, 20 C]maximum weekly average≤ 30 mg/Lall yearD022
BOD, carbonaceous [5 day, 20 C]monthly average≤ 37.4 kg/dall yearD022
BOD, carbonaceous [5 day, 20 C]maximum weekly average≤ 74.8 kg/dall yearD022
BOD, carb-5 day, 20 deg C, percent removalmonthly average minimum≥ 85 %all yearD022
Solids, suspended percent removalmonthly average minimum≥ 85 %all yearD022
Precipitation, total defined period/inmonthly totalreport only (in)all yearS026
pHmonthly minimumreport only (SU)all yearS026
pHmonthly maximumreport only (SU)all yearS026
Solids, total suspendedmonthly averagereport only (mg/L)all yearS026
Solids, total suspendedmonthly maximumreport only (mg/L)all yearS026
Nitrogen, total [as N]quarterly averagereport only (mg/L)Mar, Jun, Sep, DecS026
Nitrogen, Kjeldahl, total [as N]quarterly averagereport only (mg/L)Mar, Jun, Sep, DecS026
Nitrite + Nitrate total [as N]quarterly averagereport only (mg/L)Mar, Jun, Sep, DecS026
Phosphorus, total [as P]monthly averagereport only (mg/L)all yearS026
BOD, carbonaceous [5 day, 20 C]monthly averagereport only (mg/L)all yearS026
BOD, carbonaceous [5 day, 20 C]monthly maximumreport only (mg/L)all yearS026

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/MN0025445 · MCP: https://passage-data.com/mcp