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Resort Management Corp

Sewerage Systems, Detroit Lakes, Minnesota. NPDES permit MN0056685, in force until May 31, 2031. Last 12 months: over a limit 17 times (last August 2026), 16 required values missing. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 47 days after each period: outfall D003 form A1 monthly (25 values), outfall D004 form A1 monthly (25 values), outfall S005 form A1 monthly (11 values), outfall S006 form A1 monthly (11 values)
Last report on file
August 2026
Oct 2024 – Sep 2025
2 values over a limit, 32 required values missing, 0 of 48 reports late

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

All 17 values over a limit
Period endingOutfallParameterReportedLimitOver by
July 2026D003BOD, carbonaceous [5 day, 20 C], monthly average1≤ .49 kg/d104%
July 2026D003BOD, carbonaceous [5 day, 20 C], monthly average38≤ 25 mg/L52%
July 2026D003BOD, carbonaceous [5 day, 20 C], maximum weekly average1.29≤ .74 kg/d74%
July 2026D003Solids, total suspended, monthly average1.07≤ .59 kg/d81%
July 2026D003Solids, total suspended, monthly average37≤ 30 mg/L23%
July 2026D003Solids, total suspended, maximum weekly average1.71≤ .88 kg/d94%
July 2026D003Solids, total suspended, maximum weekly average51≤ 45 mg/L13%
July 2026D004Solids, total suspended, monthly average2.58≤ 1.7 kg/d52%
July 2026D004Solids, total suspended, monthly average45≤ 30 mg/L50%
July 2026D004Solids, total suspended, maximum weekly average5.11≤ 2.55 kg/d100%
July 2026D004Solids, total suspended, maximum weekly average88≤ 45 mg/L96%
August 2026D003BOD, carbonaceous [5 day, 20 C], monthly average.74≤ .49 kg/d51%
August 2026D003BOD, carbonaceous [5 day, 20 C], maximum weekly average.95≤ .74 kg/d28%
August 2026D003Solids, total suspended, monthly average2.06≤ .59 kg/d249%
August 2026D003Solids, total suspended, monthly average39≤ 30 mg/L30%
August 2026D003Solids, total suspended, maximum weekly average3.26≤ .88 kg/d270%
August 2026D003Solids, total suspended, maximum weekly average58≤ 45 mg/L29%

Limits in force (72)

ParameterStatisticLimitMonthsOutfall
Oxygen, dissolved [DO]monthly minimumreport only (mg/L)all yearD003
pHmonthly minimum≥ 6 SUall yearD003
pHmonthly maximum≤ 9 SUall yearD003
Solids, total suspendedmonthly average≤ 30 mg/Lall yearD003
Solids, total suspendedmaximum weekly average≤ 45 mg/Lall yearD003
Solids, total suspendedmonthly average≤ .59 kg/dall yearD003
Solids, total suspendedmaximum weekly average≤ .88 kg/dall yearD003
Nitrogen, total [as N]monthly averagereport only (mg/L)Mar, SepD003
Nitrogen, Kjeldahl, total [as N]monthly averagereport only (mg/L)Mar, SepD003
Nitrite + Nitrate total [as N]monthly averagereport only (mg/L)Mar, SepD003
Phosphorus, total [as P]monthly averagereport only (mg/L)all yearD003
Phosphorus, total [as P]monthly averagereport only (kg/d)all yearD003
Chloride [as Cl]monthly averagereport only (mg/L)Jan, Mar, May, Jul, Sep, NovD003
Chloride [as Cl]daily maximumreport only (mg/L)Jan, Mar, May, Jul, Sep, NovD003
Sulfate, total [as SO4]quarterly maximumreport only (mg/L)Mar, Jun, Sep, DecD003
Coliform, fecal MPN + membrane ftl 44.5 Cmonthly geometric mean≤ 200 #/100mLApr–OctD003
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all yearD003
Flow, in conduit or thru treatment plantmonthly maximumreport only (MGD)all yearD003
Flow, in conduit or thru treatment plantmonthly totalreport only (Mgal/mo)all yearD003
BOD, carbonaceous [5 day, 20 C]monthly average≤ 25 mg/Lall yearD003
BOD, carbonaceous [5 day, 20 C]maximum weekly average≤ 40 mg/Lall yearD003
BOD, carbonaceous [5 day, 20 C]monthly average≤ .49 kg/dall yearD003
BOD, carbonaceous [5 day, 20 C]maximum weekly average≤ .74 kg/dall yearD003
BOD, carb-5 day, 20 deg C, percent removalmonthly average minimum≥ 85 %all yearD003
Solids, suspended percent removalmonthly average minimum≥ 85 %all yearD003
Oxygen, dissolved [DO]monthly minimumreport only (mg/L)all yearD004
pHmonthly minimum≥ 6 SUall yearD004
pHmonthly maximum≤ 9 SUall yearD004
Solids, total suspendedmonthly average≤ 30 mg/Lall yearD004
Solids, total suspendedmaximum weekly average≤ 45 mg/Lall yearD004
Solids, total suspendedmonthly average≤ 1.7 kg/dall yearD004
Solids, total suspendedmaximum weekly average≤ 2.55 kg/dall yearD004
Nitrogen, total [as N]monthly averagereport only (mg/L)Mar, SepD004
Nitrogen, Kjeldahl, total [as N]monthly averagereport only (mg/L)Mar, SepD004
Nitrite + Nitrate total [as N]monthly averagereport only (mg/L)Mar, SepD004
Phosphorus, total [as P]monthly averagereport only (mg/L)all yearD004
Phosphorus, total [as P]monthly averagereport only (kg/d)all yearD004
Chloride [as Cl]monthly averagereport only (mg/L)Jan, Mar, May, Jul, Sep, NovD004
Chloride [as Cl]daily maximumreport only (mg/L)Jan, Mar, May, Jul, Sep, NovD004
Sulfate, total [as SO4]quarterly maximumreport only (mg/L)Mar, Jun, Sep, DecD004
Coliform, fecal MPN + membrane ftl 44.5 Cmonthly geometric mean≤ 200 #/100mLApr–OctD004
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all yearD004
Flow, in conduit or thru treatment plantmonthly maximumreport only (MGD)all yearD004
Flow, in conduit or thru treatment plantmonthly totalreport only (Mgal/mo)all yearD004
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≤ 1.42 kg/dall yearD004
BOD, carbonaceous [5 day, 20 C]maximum weekly average≤ 2.13 kg/dall yearD004
BOD, carb-5 day, 20 deg C, percent removalmonthly average minimum≥ 85 %all yearD004
Solids, suspended percent removalmonthly average minimum≥ 85 %all yearD004
Precipitation, total defined period/inmonthly totalreport only (in)all yearS005
pHmonthly minimumreport only (SU)all yearS005
pHmonthly maximumreport only (SU)all yearS005
Solids, total suspendedmonthly averagereport only (mg/L)all yearS005
Solids, total suspendedmonthly maximumreport only (mg/L)all yearS005
Nitrogen, total [as N]monthly averagereport only (mg/L)Mar, SepS005
Nitrogen, Kjeldahl, total [as N]monthly averagereport only (mg/L)Mar, SepS005
Nitrite + Nitrate total [as N]monthly averagereport only (mg/L)Mar, SepS005
Phosphorus, total [as P]monthly averagereport only (mg/L)all yearS005
BOD, carbonaceous [5 day, 20 C]monthly averagereport only (mg/L)all yearS005
BOD, carbonaceous [5 day, 20 C]monthly maximumreport only (mg/L)all yearS005
Precipitation, total defined period/inmonthly totalreport only (in)all yearS006
pHmonthly minimumreport only (SU)all yearS006
pHmonthly maximumreport only (SU)all yearS006
Solids, total suspendedmonthly averagereport only (mg/L)all yearS006
Solids, total suspendedmonthly maximumreport only (mg/L)all yearS006
Nitrogen, total [as N]monthly averagereport only (mg/L)Mar, SepS006
Nitrogen, Kjeldahl, total [as N]monthly averagereport only (mg/L)Mar, SepS006
Nitrite + Nitrate total [as N]monthly averagereport only (mg/L)Mar, SepS006
Phosphorus, total [as P]monthly averagereport only (mg/L)all yearS006
BOD, carbonaceous [5 day, 20 C]monthly averagereport only (mg/L)all yearS006
BOD, carbonaceous [5 day, 20 C]monthly maximumreport only (mg/L)all yearS006

New limits from Jun 1, 2028

ParameterNew limitNew or tighterMedian, last 12 months× new limit
Chloride [as Cl], daily maximum outfall D003363 mg/L (Jan, Mar, May, Jul, Sep, Nov)new——
Chloride [as Cl], monthly average outfall D003230 mg/L (Jan, Mar, May, Jul, Sep, Nov)new——
Chloride [as Cl], daily maximum outfall D004308 mg/L (Jan, Mar, May, Jul, Sep, Nov)new——
Chloride [as Cl], monthly average outfall D004230 mg/L (Jan, Mar, May, Jul, Sep, Nov)new——

How strict are these limits?

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

Check this month's numbers Email me before each report is due

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Your permit document is the final word. As JSON: /api/v1/permits/MN0056685 · MCP: https://passage-data.com/mcp