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Motley city of

Sewage treatment plant, Motley, Minnesota. NPDES permit MN0024244 expired May 31, 2026; its limits still apply. Last 12 months: over a limit 2 times (last March 2026). Source: EPA ECHO, Oct 22, 2026.

Reports due
About 47 days after each period: outfall D001 form A1 monthly (23 values), outfall D001 form A3 monthly (1 value), outfall S002 form A1 monthly (11 values)
Last report on file
September 2026
Oct 2024 – Sep 2025
15 values over a limit, 0 required values missing, 0 of 37 reports late

Last 12 months (Oct 1, 2025 – Sep 30, 2026)

Period endingParameterReportedLimitOver by
March 2026Phosphorus, total [as P], monthly average1.7≤ 1 mg/L70%
March 2026Solids, suspended percent removal, monthly average minimum78≥ 85 %47%

Limits in force (38)

ParameterStatisticLimitMonthsOutfall
Oxygen, dissolved [DO]monthly minimumreport only (mg/L)all yearD001
pHmonthly minimum≥ 6 SUall yearD001
pHmonthly maximum≤ 9 SUall yearD001
Solids, total suspendedmonthly average≤ 45 mg/Lall yearD001
Solids, total suspendedmonthly maximumreport only (mg/L)JulD001
Solids, total suspendedmaximum weekly average≤ 65 mg/Lall yearD001
Solids, total suspendedmonthly average≤ 73.1 kg/dall yearD001
Solids, total suspendedmaximum weekly average≤ 105.6 kg/dall yearD001
Nitrogen, total [as N]quarterly averagereport only (mg/L)Mar, Jun, Sep, DecD001
Nitrogen, ammonia total [as N]monthly averagereport only (mg/L)Mar, SepD001
Nitrogen, Kjeldahl, total [as N]quarterly averagereport only (mg/L)Mar, Jun, Sep, DecD001
Nitrite + Nitrate total [as N]quarterly averagereport only (mg/L)Mar, Jun, Sep, DecD001
Phosphorus, total [as P]monthly average≤ 1 mg/Lall yearD001
Phosphorus, total [as P]annual total≤ 594 kg/yrall yearD001
Sulfate, total [as SO4]monthly averagereport only (mg/L)all yearD001
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all yearD001
Flow, in conduit or thru treatment plantmonthly maximumreport only (MGD)all yearD001
Flow, in conduit or thru treatment plantmonthly totalreport only (Mgal/mo)all yearD001
Solids, total dissolvedmonthly averagereport only (mg/L)Mar, SepD001
Mercury, dissolved [as Hg]monthly maximumreport only (ng/L)JulD001
Mercury, total [as Hg]monthly maximumreport only (ng/L)JulD001
BOD, carbonaceous [5 day, 20 C]monthly average≤ 25 mg/Lall yearD001
BOD, carbonaceous [5 day, 20 C]maximum weekly average≤ 40 mg/Lall yearD001
BOD, carbonaceous [5 day, 20 C]monthly average≤ 40.6 kg/dall yearD001
BOD, carbonaceous [5 day, 20 C]maximum weekly average≤ 65 kg/dall yearD001
BOD, carb-5 day, 20 deg C, percent removalmonthly average minimum≥ 85 %all yearD001
Solids, suspended percent removalmonthly average minimum≥ 85 %all yearD001
Precipitation, total defined period/inmonthly totalreport only (in)all yearS002
pHmonthly minimumreport only (SU)all yearS002
pHmonthly maximumreport only (SU)all yearS002
Solids, total suspendedmonthly averagereport only (mg/L)all yearS002
Solids, total suspendedmonthly maximumreport only (mg/L)all yearS002
Nitrogen, total [as N]quarterly averagereport only (mg/L)Mar, Jun, Sep, DecS002
Nitrogen, Kjeldahl, total [as N]quarterly averagereport only (mg/L)Mar, Jun, Sep, DecS002
Nitrite + Nitrate total [as N]quarterly averagereport only (mg/L)Mar, Jun, Sep, DecS002
Phosphorus, total [as P]monthly averagereport only (mg/L)all yearS002
BOD, carbonaceous [5 day, 20 C]monthly averagereport only (mg/L)all yearS002
BOD, carbonaceous [5 day, 20 C]monthly maximumreport only (mg/L)all yearS002

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/MN0024244 · MCP: https://passage-data.com/mcp