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Kerkhoven city of

Sewage treatment plant, Kerkhoven, Minnesota. NPDES permit MN0020583, in force until Sep 30, 2029. Last 12 months: over a limit 17 times (last June 2026), 31 required values missing. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 47 days after each period: outfall D007 form A1 monthly (10 values), outfall D007 form A2 monthly (24 values), outfall S009 form A1 monthly (11 values)
Last report on file
September 2026
Oct 2024 – Sep 2025
35 values over a limit, 62 required values missing, 0 of 36 reports late

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

All 17 values over a limit
Period endingParameterReportedLimitOver by
October 2025Solids, suspended percent removal, monthly average minimum79≥ 85 %40%
December 2025Solids, suspended percent removal, monthly average minimum78≥ 85 %47%
February 2026BOD, carb-5 day, 20 deg C, percent removal, monthly average minimum50.07≥ 85 %233%
February 2026BOD, carbonaceous [5 day, 20 C], monthly average37.56≤ 15 mg/L150%
February 2026BOD, carbonaceous [5 day, 20 C], maximum weekly average114.2≤ 25 mg/L357%
February 2026Solids, suspended percent removal, monthly average minimum76≥ 85 %60%
March 2026BOD, carb-5 day, 20 deg C, percent removal, monthly average minimum67.03≥ 85 %120%
March 2026BOD, carbonaceous [5 day, 20 C], maximum weekly average28≤ 25 mg/L12%
March 2026Solids, suspended percent removal, monthly average minimum54≥ 85 %207%
April 2026BOD, carb-5 day, 20 deg C, percent removal, monthly average minimum-689.61≥ 85 %5164%
April 2026BOD, carbonaceous [5 day, 20 C], monthly average44≤ 15 mg/L193%
April 2026BOD, carbonaceous [5 day, 20 C], maximum weekly average62≤ 25 mg/L148%
April 2026Solids, suspended percent removal, monthly average minimum-558.0189≥ 85 %4287%
April 2026Solids, total suspended, monthly average70≤ 30 mg/L133%
April 2026Solids, total suspended, maximum weekly average163≤ 45 mg/L262%
May 2026Solids, suspended percent removal, monthly average minimum82≥ 85 %20%
June 2026Solids, suspended percent removal, monthly average minimum77≥ 85 %53%

Limits in force (48)

ParameterStatisticLimitMonthsOutfall
Specific conductancemonthly maximumreport only (umho/cm)all yearD007
Oxygen, dissolved [DO]monthly minimumreport only (mg/L)all yearD007
pHmonthly minimum≥ 6 SUall yearD007
pHmonthly maximum≤ 9 SUall yearD007
Bicarbonate ion- [as HCO3]monthly maximumreport only (mg/L)all yearD007
Solids, total suspendedmonthly average≤ 30 mg/Lall yearD007
Solids, total suspendedmaximum weekly average≤ 45 mg/Lall yearD007
Solids, total suspendedmonthly average≤ 17 kg/dall yearD007
Solids, total suspendedmaximum weekly average≤ 25.5 kg/dall yearD007
Nitrogen, total [as N]quarterly averagereport only (mg/L)Mar, Jun, Sep, DecD007
Nitrogen, ammonia total [as N]monthly averagereport only (mg/L)Mar, SepD007
Nitrogen, Kjeldahl, total [as N]quarterly averagereport only (mg/L)Mar, Jun, Sep, DecD007
Nitrite + Nitrate total [as N]quarterly averagereport only (mg/L)Mar, Jun, Sep, DecD007
Phosphorus, total [as P]monthly averagereport only (mg/L)Jun–SepD007
Phosphorus, total [as P]monthly averagereport only (mg/L)Jan, Feb, Mar, Apr, May, Oct, Nov, DecD007
Phosphorus, total [as P]monthly average≤ 2.1 kg/dJun–SepD007
Phosphorus, total [as P]monthly averagereport only (kg/d)Jan, Feb, Mar, Apr, May, Oct, Nov, DecD007
Phosphorus, total [as P]annual total≤ 725 kg/yrall yearD007
Calcium, total [as Ca]monthly maximumreport only (mg/L)all yearD007
Magnesium, total [as Mg]monthly maximumreport only (mg/L)all yearD007
Sodium, total [as Na]monthly maximumreport only (mg/L)all yearD007
Potassium, total [as K]monthly maximumreport only (mg/L)all yearD007
Chloride [as Cl]monthly average≤ 468 mg/LJan, Mar, May, Jul, Sep, NovD007
Sulfate, total [as SO4]monthly maximumreport only (mg/L)all yearD007
Hardness, Ca Mg Calculated [mg/L as CaCO3]monthly maximumreport only (mg/L)all yearD007
Coliform, fecal MPN + membrane ftl 44.5 Cmonthly geometric mean≤ 200 #/100mLMay–OctD007
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all yearD007
Flow, in conduit or thru treatment plantmonthly maximumreport only (MGD)all yearD007
Flow, in conduit or thru treatment plantmonthly totalreport only (Mgal/mo)all yearD007
Chlorine, total residualdaily maximumreport only (mg/L)May–OctD007
Solids, total dissolvedmonthly maximumreport only (mg/L)all yearD007
BOD, carbonaceous [5 day, 20 C]monthly average≤ 15 mg/Lall yearD007
BOD, carbonaceous [5 day, 20 C]maximum weekly average≤ 25 mg/Lall yearD007
BOD, carbonaceous [5 day, 20 C]monthly average≤ 8.5 kg/dall yearD007
BOD, carbonaceous [5 day, 20 C]maximum weekly average≤ 14.2 kg/dall yearD007
BOD, carb-5 day, 20 deg C, percent removalmonthly average minimum≥ 85 %all yearD007
Solids, suspended percent removalmonthly average minimum≥ 85 %all yearD007
Precipitation, total defined period/inmonthly totalreport only (in)all yearS009
pHmonthly minimumreport only (SU)all yearS009
pHmonthly maximumreport only (SU)all yearS009
Solids, total suspendedmonthly averagereport only (mg/L)all yearS009
Solids, total suspendedmonthly maximumreport only (mg/L)all yearS009
Nitrogen, total [as N]quarterly averagereport only (mg/L)Mar, Jun, Sep, DecS009
Nitrogen, Kjeldahl, total [as N]quarterly averagereport only (mg/L)Mar, Jun, Sep, DecS009
Nitrite + Nitrate total [as N]quarterly averagereport only (mg/L)Mar, Jun, Sep, DecS009
Phosphorus, total [as P]monthly averagereport only (mg/L)all yearS009
BOD, carbonaceous [5 day, 20 C]monthly averagereport only (mg/L)all yearS009
BOD, carbonaceous [5 day, 20 C]monthly maximumreport only (mg/L)all yearS009

New limits from May 1, 2028

ParameterNew limitNew or tighterMedian, last 12 months× new limit
Chlorine, total residual, daily maximum0.038 mg/L (May–Oct)new0.69 mg/L (6 values)18.2×

How strict are these limits?

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

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Your permit document is the final word. As JSON: /api/v1/permits/MN0020583 · MCP: https://passage-data.com/mcp