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Hokah city of

Sewage treatment plant, Hokah, Minnesota. NPDES permit MN0021458 expired Oct 31, 2024; 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 D016 form A1 monthly (24 values), outfall S017 form A1 monthly (14 values)
Last report on file
September 2026
Oct 2024 – Sep 2025
0 values over a limit, 0 required values missing, 0 of 24 reports late

Limits in force (38)

ParameterStatisticLimitMonthsOutfall
Oxygen, dissolved [DO]monthly minimumreport only (mg/L)all yearD016
pHmonthly minimum≥ 6 SUall yearD016
pHmonthly maximum≤ 9 SUall yearD016
Solids, total suspendedmonthly average≤ 30 mg/Lall yearD016
Solids, total suspendedmaximum weekly average≤ 45 mg/Lall yearD016
Solids, total suspendedmonthly average≤ 12 kg/dall yearD016
Solids, total suspendedmaximum weekly average≤ 17 kg/dall yearD016
Nitrogen, total [as N]quarterly averagereport only (mg/L)Mar, Jun, Sep, DecD016
Nitrogen, ammonia total [as N]monthly averagereport only (mg/L)Mar, SepD016
Nitrogen, Kjeldahl, total [as N]quarterly averagereport only (mg/L)Mar, Jun, Sep, DecD016
Nitrite + Nitrate total [as N]quarterly averagereport only (mg/L)Mar, Jun, Sep, DecD016
Phosphorus, total [as P]monthly averagereport only (mg/L)all yearD016
Phosphorus, total [as P]monthly averagereport only (kg/d)all yearD016
Coliform, fecal MPN + membrane ftl 44.5 Cmonthly geometric mean≤ 200 #/100mLApr–OctD016
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all yearD016
Flow, in conduit or thru treatment plantmonthly maximumreport only (MGD)all yearD016
Flow, in conduit or thru treatment plantmonthly totalreport only (Mgal/mo)all yearD016
Solids, total dissolvedmonthly averagereport only (mg/L)Mar, SepD016
BOD, carbonaceous [5 day, 20 C]monthly average≤ 25 mg/Lall yearD016
BOD, carbonaceous [5 day, 20 C]maximum weekly average≤ 40 mg/Lall yearD016
BOD, carbonaceous [5 day, 20 C]monthly average≤ 10 kg/dall yearD016
BOD, carbonaceous [5 day, 20 C]maximum weekly average≤ 15 kg/dall yearD016
BOD, carb-5 day, 20 deg C, percent removalmonthly average minimum≥ 85 %all yearD016
Solids, suspended percent removalmonthly average minimum≥ 85 %all yearD016
Precipitation, total defined period/inmonthly totalreport only (in)all yearS017
pHmonthly minimumreport only (SU)all yearS017
pHmonthly maximumreport only (SU)all yearS017
Solids, total suspendedmonthly averagereport only (mg/L)all yearS017
Solids, total suspendedmonthly maximumreport only (mg/L)all yearS017
Nitrogen, total [as N]quarterly averagereport only (mg/L)Mar, Jun, Sep, DecS017
Nitrogen, Kjeldahl, total [as N]quarterly averagereport only (mg/L)Mar, Jun, Sep, DecS017
Nitrite + Nitrate total [as N]quarterly averagereport only (mg/L)Mar, Jun, Sep, DecS017
Phosphorus, total [as P]monthly averagereport only (mg/L)all yearS017
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all yearS017
Flow, in conduit or thru treatment plantmonthly maximumreport only (MGD)all yearS017
Flow, in conduit or thru treatment plantmonthly totalreport only (Mgal/mo)all yearS017
BOD, carbonaceous [5 day, 20 C]monthly averagereport only (mg/L)all yearS017
BOD, carbonaceous [5 day, 20 C]monthly maximumreport only (mg/L)all yearS017

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/MN0021458 · MCP: https://passage-data.com/mcp