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Lake Benton city of

Sewage treatment plant, Lake Benton, Minnesota. NPDES permit MN0023884 expired Feb 28, 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: outfall D009 form A1 monthly (24 values), outfall D009 form A2 monthly (1 value), outfall S010 form A1 monthly (11 values)
Last report on file
September 2026
Oct 2024 – Sep 2025
0 values over a limit, 0 required values missing, 0 of 36 reports late

Limits in force (39)

ParameterStatisticLimitMonthsOutfall
Oxygen, dissolved [DO]monthly minimumreport only (mg/L)all yearD009
pHmonthly minimum≥ 6 SUall yearD009
pHmonthly maximum≤ 9 SUall yearD009
Solids, total suspendedmonthly average≤ 45 mg/Lall yearD009
Solids, total suspendedmaximum weekly average≤ 65 mg/Lall yearD009
Solids, total suspendedannual maximumreport only (mg/L)all yearD009
Solids, total suspendedmonthly average≤ 111 kg/dall yearD009
Solids, total suspendedmaximum weekly average≤ 160 kg/dall yearD009
Nitrogen, total [as N]monthly averagereport only (mg/L)all yearD009
Nitrogen, ammonia total [as N]monthly averagereport only (mg/L)all yearD009
Nitrogen, Kjeldahl, total [as N]monthly averagereport only (mg/L)all yearD009
Nitrite + Nitrate total [as N]monthly averagereport only (mg/L)all yearD009
Phosphorus, total [as P]monthly averagereport only (mg/L)all yearD009
Phosphorus, total [as P]monthly averagereport only (kg/d)all yearD009
Coliform, fecal MPN + membrane ftl 44.5 Cmonthly geometric mean≤ 200 #/100mLApr–OctD009
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)Jan, Feb, Jul, AugD009
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)Mar, Apr, May, Jun, Sep, Oct, Nov, DecD009
Flow, in conduit or thru treatment plantmonthly maximumreport only (MGD)Jan, Feb, Jul, AugD009
Flow, in conduit or thru treatment plantmonthly maximumreport only (MGD)Mar, Apr, May, Jun, Sep, Oct, Nov, DecD009
Flow, in conduit or thru treatment plantmonthly totalreport only (Mgal/mo)Jan, Feb, Jul, AugD009
Flow, in conduit or thru treatment plantmonthly totalreport only (Mgal/mo)Mar, Apr, May, Jun, Sep, Oct, Nov, DecD009
Solids, total dissolvedmonthly averagereport only (mg/L)all yearD009
Mercury, dissolved [as Hg]annual maximumreport only (ng/L)all yearD009
Mercury, total [as Hg]annual maximumreport only (ng/L)all yearD009
BOD, carbonaceous [5 day, 20 C]monthly average≤ 25 mg/Lall yearD009
BOD, carbonaceous [5 day, 20 C]maximum weekly average≤ 40 mg/Lall yearD009
BOD, carbonaceous [5 day, 20 C]monthly average≤ 62 kg/dall yearD009
BOD, carbonaceous [5 day, 20 C]maximum weekly average≤ 99 kg/dall yearD009
Precipitation, total defined period/inmonthly totalreport only (in)all yearS010
pHquarterly maximumreport only (SU)Mar, Jun, Sep, DecS010
Solids, total suspendedquarterly averagereport only (mg/L)Mar, Jun, Sep, DecS010
Nitrogen, total [as N]quarterly averagereport only (mg/L)Mar, Jun, Sep, DecS010
Nitrogen, Kjeldahl, total [as N]quarterly averagereport only (mg/L)Mar, Jun, Sep, DecS010
Nitrite + Nitrate total [as N]quarterly averagereport only (mg/L)Mar, Jun, Sep, DecS010
Phosphorus, total [as P]quarterly averagereport only (mg/L)Mar, Jun, Sep, DecS010
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all yearS010
Flow, in conduit or thru treatment plantmonthly maximumreport only (MGD)all yearS010
Flow, in conduit or thru treatment plantmonthly totalreport only (Mgal/mo)all yearS010
BOD, carbonaceous [5 day, 20 C]quarterly averagereport only (mg/L)Mar, Jun, Sep, DecS010

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/MN0023884 · MCP: https://passage-data.com/mcp