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Land, Mineral, Wildlife Conservation, Isle, Minnesota. NPDES permit MN0033723 expired Mar 31, 2024; its limits still apply. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 45 days after each period: outfall D004 form A1 monthly (20 values), outfall S005 form A1 monthly (11 values)
Last report on file
September 2026
Oct 2024 – Sep 2025
0 values over a limit, 0 required values missing, 2 of 19 reports late

Limits in force (36)

ParameterStatisticLimitMonthsOutfall
Oxygen, dissolved [DO]monthly minimumreport only (mg/L)all yearD004
pHmonthly minimum≥ 6 SUall yearD004
pHmonthly maximum≤ 9 SUall yearD004
Solids, total suspendedmonthly average≤ 45 mg/Lall yearD004
Solids, total suspendedmaximum weekly average≤ 65 mg/Lall yearD004
Solids, total suspendedmonthly average≤ 13.9 kg/dall yearD004
Solids, total suspendedmaximum weekly average≤ 20 kg/dall yearD004
Nitrogen, total [as N]monthly averagereport only (mg/L)all yearD004
Nitrogen, Kjeldahl, total [as N]monthly averagereport only (mg/L)all yearD004
Nitrite + Nitrate total [as N]monthly averagereport only (mg/L)all yearD004
Phosphorus, total [as P]monthly average≤ 1 mg/LApr–OctD004
Phosphorus, total [as P]monthly averagereport only (mg/L)Jan, Feb, Mar, Nov, DecD004
Phosphorus, total [as P]monthly averagereport only (kg/d)Apr–OctD004
Phosphorus, total [as P]monthly averagereport only (kg/d)Jan, Feb, Mar, Nov, DecD004
Coliform, fecal MPN + membrane ftl 44.5 Cmonthly geometric mean≤ 200 #/100mLApr–OctD004
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)Mar, Apr, May, Jun, Sep, Oct, Nov, DecD004
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)Jan, Feb, Jul, AugD004
Flow, in conduit or thru treatment plantmonthly maximumreport only (MGD)Mar, Apr, May, Jun, Sep, Oct, Nov, DecD004
Flow, in conduit or thru treatment plantmonthly maximumreport only (MGD)Jan, Feb, Jul, AugD004
Flow, in conduit or thru treatment plantmonthly totalreport only (Mgal/mo)Mar, Apr, May, Jun, Sep, Oct, Nov, DecD004
Flow, in conduit or thru treatment plantmonthly totalreport only (Mgal/mo)Jan, Feb, Jul, AugD004
BOD, carbonaceous [5 day, 20 C]monthly average≤ 25 mg/Lall yearD004
BOD, carbonaceous [5 day, 20 C]maximum weekly average≤ 40 mg/Lall yearD004
BOD, carbonaceous [5 day, 20 C]monthly average≤ 7.7 kg/dall yearD004
BOD, carbonaceous [5 day, 20 C]maximum weekly average≤ 12.3 kg/dall yearD004
Precipitation, total defined period/inmonthly totalreport only (in)Apr–OctS005
pHmonthly maximumreport only (SU)Jun, SepS005
Solids, total suspendedmonthly averagereport only (mg/L)Jun, SepS005
Nitrogen, total [as N]monthly averagereport only (mg/L)Jun, SepS005
Nitrogen, Kjeldahl, total [as N]monthly averagereport only (mg/L)Jun, SepS005
Nitrite + Nitrate total [as N]monthly averagereport only (mg/L)Jun, SepS005
Phosphorus, total [as P]monthly averagereport only (mg/L)Jun, SepS005
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)Apr–OctS005
Flow, in conduit or thru treatment plantmonthly maximumreport only (MGD)Apr–OctS005
Flow, in conduit or thru treatment plantmonthly totalreport only (Mgal/mo)Apr–OctS005
BOD, carbonaceous [5 day, 20 C]monthly averagereport only (mg/L)Jun, SepS005

How strict are these limits?

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/MN0033723 · MCP: https://passage-data.com/mcp