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Ostrander city of

Sewage treatment plant, Ostrander, Minnesota. NPDES permit MN0024449 expired Sep 30, 2024; 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 D011 form A1 monthly (22 values), outfall S013 form A1 monthly (14 values)
Last report on file
August 2026
Oct 2024 – Sep 2025
0 values over a limit, 0 required values missing, 0 of 24 reports late

Limits in force (36)

ParameterStatisticLimitMonthsOutfall
Oxygen, dissolved [DO]monthly minimumreport only (mg/L)all yearD011
pHmonthly minimum≥ 6 SUall yearD011
pHmonthly maximum≤ 9 SUall yearD011
Solids, total suspendedmonthly average≤ 30 mg/Lall yearD011
Solids, total suspendedmaximum weekly average≤ 45 mg/Lall yearD011
Solids, total suspendedmonthly average≤ 5 kg/dall yearD011
Solids, total suspendedmaximum weekly average≤ 7 kg/dall yearD011
Nitrogen, total [as N]monthly average≤ 41 mg/Lall yearD011
Nitrogen, Kjeldahl, total [as N]monthly averagereport only (mg/L)all yearD011
Nitrite + Nitrate total [as N]monthly averagereport only (mg/L)all yearD011
Phosphorus, total [as P]monthly averagereport only (mg/L)all yearD011
Phosphorus, total [as P]monthly averagereport only (kg/d)all yearD011
Coliform, fecal MPN + membrane ftl 44.5 Cmonthly geometric mean≤ 200 #/100mLall yearD011
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all yearD011
Flow, in conduit or thru treatment plantmonthly maximumreport only (MGD)all yearD011
Flow, in conduit or thru treatment plantmonthly totalreport only (Mgal/mo)all yearD011
BOD, carbonaceous [5 day, 20 C]monthly average≤ 25 mg/Lall yearD011
BOD, carbonaceous [5 day, 20 C]maximum weekly average≤ 40 mg/Lall yearD011
BOD, carbonaceous [5 day, 20 C]monthly average≤ 4 kg/dall yearD011
BOD, carbonaceous [5 day, 20 C]maximum weekly average≤ 6 kg/dall yearD011
BOD, carb-5 day, 20 deg C, percent removalmonthly average minimum≥ 85 %all yearD011
Solids, suspended percent removalmonthly average minimum≥ 85 %all yearD011
Precipitation, total defined period/inmonthly totalreport only (in)all yearS013
pHmonthly minimumreport only (SU)all yearS013
pHmonthly maximumreport only (SU)all yearS013
Solids, total suspendedmonthly averagereport only (mg/L)all yearS013
Solids, total suspendedmonthly maximumreport only (mg/L)all yearS013
Nitrogen, total [as N]monthly averagereport only (mg/L)all yearS013
Nitrogen, Kjeldahl, total [as N]monthly averagereport only (mg/L)all yearS013
Nitrite + Nitrate total [as N]monthly averagereport only (mg/L)all yearS013
Phosphorus, total [as P]monthly averagereport only (mg/L)all yearS013
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all yearS013
Flow, in conduit or thru treatment plantmonthly maximumreport only (MGD)all yearS013
Flow, in conduit or thru treatment plantmonthly totalreport only (Mgal/mo)all yearS013
BOD, carbonaceous [5 day, 20 C]monthly averagereport only (mg/L)all yearS013
BOD, carbonaceous [5 day, 20 C]monthly maximumreport only (mg/L)all yearS013

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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On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/MN0024449 · MCP: https://passage-data.com/mcp