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Murdock city of

Sewage treatment plant, Murdock, Minnesota. NPDES permit MN0052990, in force until Jan 31, 2031. Last 12 months: over a limit 5 times (last May 2026). Source: EPA ECHO, Oct 22, 2026.

Reports due
About 47 days after each period: outfall D001 form A1 monthly (21 values), outfall D001 form A2 monthly (1 value), outfall S002 form A1 monthly (11 values)
Last report on file
August 2026

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

Period endingParameterReportedLimitOver by
May 2026BOD, carbonaceous [5 day, 20 C], monthly average46≤ 30 kg/d53%
May 2026BOD, carbonaceous [5 day, 20 C], maximum weekly average54≤ 48 kg/d13%
May 2026Solids, total suspended, monthly average169≤ 54 kg/d213%
May 2026Solids, total suspended, monthly average53≤ 45 mg/L18%
May 2026Solids, total suspended, maximum weekly average200≤ 78 kg/d156%

Limits in force (36)

ParameterStatisticLimitMonthsOutfall
Oxygen, dissolved [DO]monthly minimumreport only (mg/L)all yearD001
pHmonthly minimum≥ 6 SUall yearD001
pHmonthly maximum≤ 9 SUall yearD001
Solids, total suspendedmonthly average≤ 45 mg/Lall yearD001
Solids, total suspendedmaximum weekly average≤ 65 mg/Lall yearD001
Solids, total suspendedmonthly average≤ 54 kg/dall yearD001
Solids, total suspendedmaximum weekly average≤ 78 kg/dall yearD001
Nitrogen, total [as N]monthly averagereport only (mg/L)all yearD001
Nitrogen, Kjeldahl, total [as N]monthly averagereport only (mg/L)all yearD001
Nitrite + Nitrate total [as N]monthly averagereport only (mg/L)all yearD001
Phosphorus, total [as P]monthly averagereport only (mg/L)all yearD001
Phosphorus, total [as P]monthly averagereport only (kg/d)all yearD001
Phosphorus, total [as P]year-to-date total≤ 346 kg/yrall yearD001
Sulfate, total [as SO4]monthly maximumreport only (mg/L)all yearD001
Coliform, fecal MPN + membrane ftl 44.5 Cmonthly geometric mean≤ 200 #/100mLMay–OctD001
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)Mar, Apr, May, Jun, Sep, Oct, Nov, DecD001
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)Jan, Feb, Jul, AugD001
Flow, in conduit or thru treatment plantmonthly maximumreport only (MGD)Mar, Apr, May, Jun, Sep, Oct, Nov, DecD001
Flow, in conduit or thru treatment plantmonthly maximumreport only (MGD)Jan, Feb, Jul, AugD001
Flow, in conduit or thru treatment plantmonthly totalreport only (Mgal/mo)Mar, Apr, May, Jun, Sep, Oct, Nov, DecD001
Flow, in conduit or thru treatment plantmonthly totalreport only (Mgal/mo)Jan, Feb, Jul, AugD001
BOD, carbonaceous [5 day, 20 C]monthly average≤ 25 mg/Lall yearD001
BOD, carbonaceous [5 day, 20 C]maximum weekly average≤ 40 mg/Lall yearD001
BOD, carbonaceous [5 day, 20 C]monthly average≤ 30 kg/dall yearD001
BOD, carbonaceous [5 day, 20 C]maximum weekly average≤ 48 kg/dall yearD001
Precipitation, total defined period/inmonthly totalreport only (in)all yearS002
pHquarterly maximumreport only (SU)Mar, Jun, Sep, DecS002
Solids, total suspendedquarterly averagereport only (mg/L)Mar, Jun, Sep, DecS002
Nitrogen, total [as N]monthly averagereport only (mg/L)Mar, SepS002
Nitrogen, Kjeldahl, total [as N]monthly averagereport only (mg/L)Mar, SepS002
Nitrite + Nitrate total [as N]monthly averagereport only (mg/L)Mar, SepS002
Phosphorus, total [as P]quarterly averagereport only (mg/L)Mar, Jun, Sep, DecS002
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all yearS002
Flow, in conduit or thru treatment plantmonthly maximumreport only (MGD)all yearS002
Flow, in conduit or thru treatment plantmonthly totalreport only (Mgal/mo)all yearS002
BOD, carbonaceous [5 day, 20 C]quarterly averagereport only (mg/L)Mar, Jun, Sep, DecS002

New limits from Jan 1, 2031

ParameterNew limitNew or tighterMedian, last 12 months× new limit
Phosphorus, total [as P], year-to-date total119 kg/yrtighter——

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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On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/MN0052990 · MCP: https://passage-data.com/mcp