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Wisconsin Central Limited

Railroads, Line-Haul Operating, Two Harbors, Minnesota. NPDES permit MN0049018 expired Jan 31, 2025; 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: form A1 monthly (15 values)
Last report on file
August 2026
Oct 2024 – Sep 2025
0 values over a limit, 0 required values missing, 0 of 12 reports late

Limits in force (15)

ParameterStatisticLimitMonths
pHinstantaneous minimum≥ 6 SUall year
pHinstantaneous maximum≤ 9 SUall year
Solids, total suspendedmonthly average≤ 30 mg/Lall year
Solids, total suspendedmonthly maximumreport only (mg/L)all year
Nitrogen, total [as N]monthly averagereport only (mg/L)Mar, Sep
Nitrogen, ammonia total [as N]monthly averagereport only (mg/L)Mar, Sep
Nitrogen, Kjeldahl, total [as N]monthly averagereport only (mg/L)Mar, Sep
Nitrite + Nitrate total [as N]monthly averagereport only (mg/L)Mar, Sep
Iron, total [as Fe]monthly average≤ 1 mg/Lall year
Iron, total [as Fe]daily maximum≤ 2 mg/Lall year
Diesel range organics diesel, total, wtrdaily maximum≤ 5500 ug/Lall year
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year
Flow, in conduit or thru treatment plantmonthly totalreport only (Mgal/mo)all year
Solids, total dissolvedmonthly averagereport only (mg/L)Mar, Sep

How strict are these limits?

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

Same industry: the 3 Railroad Transportation permits in Minnesota.

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/MN0049018 · MCP: https://passage-data.com/mcp