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Minnesota Power

Electric Services, major discharger, Schroeder, Minnesota. NPDES permit MN0002208 expired Sep 30, 2023; its limits still apply. Last 12 months: no values over a limit, 9 required values missing. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 47 days after each period: outfall D009 form A1 monthly (12 values), outfall D010 form A1 monthly (23 values), outfall D010 form A2 monthly (1 value), outfall W020 form A1 monthly (2 values), outfall W021 form A1 monthly (2 values)
Last report on file
September 2026
Oct 2024 – Sep 2025
0 values over a limit, 12 required values missing, 0 of 60 reports late

Limits in force (41)

ParameterStatisticLimitMonthsOutfall
Temperature, water deg. fahrenheitdaily maximumreport only (deg F)all yearD009
Temp. diff. between samp. & upstrm deg. Fmaximum daily average≤ 23 deg Fall yearD009
pHinstantaneous minimum≥ 6.5 SUall yearD009
pHinstantaneous maximum≤ 8.5 SUall yearD009
Oil and grease, hexane extr methodmonthly average≤ 10 mg/Lall yearD009
Oil and grease, hexane extr methoddaily maximum≤ 15 mg/Lall yearD009
Nitrogen, total [as N]annual averagereport only (mg/L)all yearD009
Nitrogen, Kjeldahl, total [as N]annual averagereport only (mg/L)all yearD009
Nitrite + Nitrate total [as N]annual averagereport only (mg/L)all yearD009
Phosphorus, total [as P]quarterly averagereport only (mg/L)Mar, Jun, Sep, DecD009
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all yearD009
Flow, in conduit or thru treatment plantmonthly totalreport only (Mgal/mo)all yearD009
Rainfall durationmonthly totalreport only (hr/d)all yearD010
Precipitation, total defined period/inmonthly totalreport only (in)all yearD010
pHinstantaneous minimum≥ 6 SUall yearD010
pHinstantaneous maximum≤ 9 SUall yearD010
Bicarbonate ion- [as HCO3]monthly averagereport only (mg/L)all yearD010
Solids, total suspendedmonthly average≤ 30 mg/Lall yearD010
Solids, total suspendeddaily maximumreport only (mg/L)all yearD010
Solids, total suspendeddaily maximum≤ 50 mg/Lall yearD010
Oil and grease, hexane extr methodmonthly average≤ 10 mg/Lall yearD010
Oil and grease, hexane extr methoddaily maximum≤ 15 mg/Lall yearD010
Phosphorus, total [as P]quarterly averagereport only (mg/L)Mar, Jun, Sep, DecD010
Magnesium, total [as Mg]monthly averagereport only (mg/L)all yearD010
Potassium, dissolved [as K]monthly averagereport only (mg/L)all yearD010
Chloride [as Cl]monthly averagereport only (mg/L)all yearD010
Sulfate, dissolved [as SO4]monthly averagereport only (mg/L)all yearD010
Flow, in conduit or thru treatment plantdaily maximum≤ .72 MGDall yearD010
Flow, in conduit or thru treatment plantmonthly totalreport only (Mgal/mo)all yearD010
Mercury, dissolved [as Hg]daily maximumreport only (ng/L)all yearD010
Mercury, total [as Hg]monthly averagereport only (ng/L)all yearD010
Mercury, total [as Hg]daily maximumreport only (ng/L)all yearD010
Mercury, total [as Hg]monthly averagereport only (mg/d)all yearD010
Mercury, total [as Hg]daily maximumreport only (mg/d)all yearD010
Depth of pond or reservoir in feetmonthly totalreport only (ft)Mar–NovD010
Effluent dilution ratiodaily minimum≥ 10 Ratioall yearD010
Duration of dischargemonthly total≤ 192 hr/moall yearD010
Temperature, water deg. fahrenheitmaximum daily averagereport only (deg F)all yearW020
Temperature, water deg. fahrenheitdaily maximumreport only (deg F)all yearW020
Temperature, water deg. fahrenheitmaximum daily averagereport only (deg F)all yearW021
Temperature, water deg. fahrenheitdaily maximumreport only (deg F)all yearW021

How strict are these limits?

Cited limits by parameter: Minnesota's rules and the federal ones.

Same industry: the 12 Electric Services permits in Minnesota.

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On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/MN0002208 · MCP: https://passage-data.com/mcp