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Xcel Energy - Allen S King Generating Plant

Electric Services, major discharger, Oak Park Heights, Minnesota. NPDES permit MN0000825 expired Jan 31, 2010; its limits still apply. Last 12 months: no values over a limit, 24 required values missing. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 47 days after each period: outfall 010 form M monthly (8 values), outfall 012 form M monthly (13 values), outfall 013 form M monthly (2 values), outfall 014 form M monthly (2 values)
Last report on file
June 2026
Oct 2024 – Sep 2025
0 values over a limit, 0 required values missing, 0 of 48 reports late

Limits in force (25)

ParameterStatisticLimitMonthsOutfall
Temperature, water deg. fahrenheitmonthly averagereport only (deg F)all year010
Temperature, water deg. fahrenheitdaily maximum≤ 86 deg Fall year010
Temperature, water deg. fahrenheitsingle samplereport only (deg F)all year010
Plant capacity fact. percent of capacitymonthly averagereport only (%)all year010
Flow, in conduit or thru treatment plantmonthly totalreport only (MGD)all year010
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year010
Chlorine, total residualinstantaneous maximum≤ .2 mg/Lall year010
Chlorinationcumulative total≤ 2 hr/dall year010
pHmonthly minimum≥ 6 SUall year012
pHmonthly maximum≤ 9 SUall year012
Solids, total suspendedmonthly average≤ 30 mg/Lall year012
Solids, total suspendeddaily maximum≤ 100 mg/Lall year012
Solids, total suspendedmonthly average≤ 295 kg/dall year012
Solids, total suspendeddaily maximum≤ 984 kg/dall year012
Oil and grease, hexane extr methodmonthly average≤ 15 mg/Lall year012
Oil and grease, hexane extr methoddaily maximum≤ 20 mg/Lall year012
Oil and grease, hexane extr methodmonthly average≤ 147 kg/dall year012
Oil and grease, hexane extr methoddaily maximum≤ 196 kg/dall year012
Flow, in conduit or thru treatment plantmonthly totalreport only (MGD)all year012
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year012
Mercury, total [as Hg]daily maximumreport only (ng/L)Mar, Jun, Sep, Dec012
Flow, in conduit or thru treatment plantmonthly totalreport only (MGD)all year013
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year013
Flow, in conduit or thru treatment plantmonthly totalreport only (MGD)all year014
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year014

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/MN0000825 · MCP: https://passage-data.com/mcp