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Sewage treatment plant, Houston, Minnesota. NPDES permit MN0023736, in force until Sep 30, 2030. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 47 days after each period: outfall D018 form A1 monthly (27 values), outfall D018 form A2 monthly (1 value), outfall S019 form A1 monthly (12 values)
Last report on file
September 2026
Oct 2024 – Sep 2025
0 values over a limit, 0 required values missing, 0 of 25 reports late

Limits in force (40)

ParameterStatisticLimitMonthsOutfall
Oxygen, dissolved [DO]monthly minimumreport only (mg/L)all yearD018
pHmonthly minimum≥ 6 SUall yearD018
pHmonthly maximum≤ 9 SUall yearD018
Solids, total suspendedmonthly average≤ 30 mg/Lall yearD018
Solids, total suspendedmonthly maximumreport only (mg/L)May, SepD018
Solids, total suspendedmaximum weekly average≤ 45 mg/Lall yearD018
Solids, total suspendedmonthly average≤ 28 kg/dall yearD018
Solids, total suspendedmaximum weekly average≤ 43 kg/dall yearD018
Nitrogen, total [as N]quarterly averagereport only (mg/L)Mar, Jun, Sep, DecD018
Nitrogen, ammonia total [as N]monthly averagereport only (mg/L)Mar, SepD018
Nitrogen, Kjeldahl, total [as N]quarterly averagereport only (mg/L)Mar, Jun, Sep, DecD018
Nitrite + Nitrate total [as N]quarterly averagereport only (mg/L)Mar, Jun, Sep, DecD018
Phosphorus, total [as P]monthly averagereport only (mg/L)all yearD018
Phosphorus, total [as P]monthly averagereport only (kg/d)all yearD018
Sulfate, total [as SO4]quarterly averagereport only (mg/L)Mar, Jun, Sep, DecD018
Coliform, fecal MPN + membrane ftl 44.5 Cmonthly geometric mean≤ 200 #/100mLApr–OctD018
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all yearD018
Flow, in conduit or thru treatment plantmonthly maximumreport only (MGD)all yearD018
Flow, in conduit or thru treatment plantmonthly totalreport only (Mgal/mo)all yearD018
Solids, total dissolvedmonthly averagereport only (mg/L)Mar, SepD018
Mercury, dissolved [as Hg]monthly maximumreport only (ng/L)May, SepD018
Mercury, total [as Hg]monthly maximumreport only (ng/L)May, SepD018
BOD, carbonaceous [5 day, 20 C]monthly average≤ 25 mg/Lall yearD018
BOD, carbonaceous [5 day, 20 C]maximum weekly average≤ 40 mg/Lall yearD018
BOD, carbonaceous [5 day, 20 C]monthly average≤ 24 kg/dall yearD018
BOD, carbonaceous [5 day, 20 C]maximum weekly average≤ 38 kg/dall yearD018
BOD, carb-5 day, 20 deg C, percent removalmonthly average minimum≥ 85 %all yearD018
Solids, suspended percent removalmonthly average minimum≥ 85 %all yearD018
Precipitation, total defined period/inmonthly totalreport only (in)all yearS019
pHmonthly minimumreport only (SU)all yearS019
pHmonthly maximumreport only (SU)all yearS019
Solids, total suspendedmonthly averagereport only (mg/L)all yearS019
Solids, total suspendedmonthly maximumreport only (mg/L)all yearS019
Nitrogen, total [as N]quarterly averagereport only (mg/L)Mar, Jun, Sep, DecS019
Nitrogen, Kjeldahl, total [as N]quarterly averagereport only (mg/L)Mar, Jun, Sep, DecS019
Nitrite + Nitrate total [as N]quarterly averagereport only (mg/L)Mar, Jun, Sep, DecS019
Phosphorus, total [as P]monthly averagereport only (mg/L)all yearS019
Mercury, total [as Hg]monthly averagereport only (ng/L)May, SepS019
BOD, carbonaceous [5 day, 20 C]monthly averagereport only (mg/L)all yearS019
BOD, carbonaceous [5 day, 20 C]monthly maximumreport only (mg/L)all yearS019

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/MN0023736 · MCP: https://passage-data.com/mcp