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Altura city of

Sewage treatment plant, Altura, Minnesota. NPDES permit MN0021831, in force until Mar 31, 2029. Last 12 months: over a limit 2 times (last August 2026). Source: EPA ECHO, Oct 22, 2026.

Reports due
About 47 days after each period: outfall D003 form A1 monthly (35 values), outfall S004 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 25 reports late

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

Period endingParameterReportedLimitOver by
February 2026Coliform, fecal MPN + membrane ftl 44.5 C, monthly geometric mean451≤ 200 #/100mL126%
August 2026Chloride [as Cl], monthly average465≤ 392 mg/L19%

Limits in force (50)

ParameterStatisticLimitMonthsOutfall
Specific conductancemonthly maximumreport only (umho/cm)Mar, SepD003
Oxygen, dissolved [DO]monthly minimumreport only (mg/L)all yearD003
pHmonthly minimum≥ 6 SUall yearD003
pHmonthly maximum≤ 9 SUall yearD003
Bicarbonate ion- [as HCO3]monthly maximumreport only (mg/L)Mar, SepD003
Solids, total suspendedmonthly average≤ 45 mg/Lall yearD003
Solids, total suspendedmonthly maximumreport only (mg/L)JulD003
Solids, total suspendedmaximum weekly average≤ 65 mg/Lall yearD003
Solids, total suspendedmonthly average≤ 61.1 kg/dall yearD003
Solids, total suspendedmaximum weekly average≤ 88.3 kg/dall yearD003
Nitrogen, total [as N]quarterly averagereport only (mg/L)Mar, Jun, Sep, DecD003
Nitrogen, ammonia total [as N]monthly averagereport only (mg/L)Mar, SepD003
Nitrogen, Kjeldahl, total [as N]quarterly averagereport only (mg/L)Mar, Jun, Sep, DecD003
Nitrite + Nitrate total [as N]monthly averagereport only (mg/L)all yearD003
Nitrite + Nitrate total [as N]monthly average≤ 13.59 kg/dall yearD003
Phosphorus, total [as P]monthly averagereport only (mg/L)all yearD003
Phosphorus, total [as P]monthly averagereport only (kg/d)all yearD003
Calcium, total [as Ca]monthly maximumreport only (mg/L)Mar, SepD003
Magnesium, total [as Mg]monthly maximumreport only (mg/L)Mar, SepD003
Sodium, total [as Na]monthly maximumreport only (mg/L)Mar, SepD003
Potassium, total [as K]monthly maximumreport only (mg/L)Mar, SepD003
Chloride [as Cl]monthly average≤ 392 mg/Lall yearD003
Chloride [as Cl]daily maximumreport only (mg/L)all yearD003
Sulfate, total [as SO4]quarterly maximumreport only (mg/L)Mar, Jun, Sep, DecD003
Hardness, Ca Mg Calculated [mg/L as CaCO3]monthly maximumreport only (mg/L)Mar, SepD003
Coliform, fecal MPN + membrane ftl 44.5 Cmonthly geometric mean≤ 200 #/100mLall yearD003
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
Chlorine, total residualdaily maximum≤ .038 mg/Lall yearD003
Solids, total dissolvedmonthly maximumreport only (mg/L)Mar, SepD003
Mercury, dissolved [as Hg]monthly maximumreport only (ng/L)JulD003
Mercury, total [as Hg]monthly maximumreport only (ng/L)JulD003
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≤ 34 kg/dall yearD003
BOD, carbonaceous [5 day, 20 C]maximum weekly average≤ 54.4 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
Precipitation, total defined period/inmonthly totalreport only (in)all yearS004
pHmonthly minimumreport only (SU)all yearS004
pHmonthly maximumreport only (SU)all yearS004
Solids, total suspendedmonthly averagereport only (mg/L)all yearS004
Solids, total suspendedmonthly maximumreport only (mg/L)all yearS004
Nitrogen, total [as N]quarterly averagereport only (mg/L)Mar, Jun, Sep, DecS004
Nitrogen, Kjeldahl, total [as N]quarterly averagereport only (mg/L)Mar, Jun, Sep, DecS004
Nitrite + Nitrate total [as N]quarterly averagereport only (mg/L)Mar, Jun, Sep, DecS004
Phosphorus, total [as P]monthly averagereport only (mg/L)all yearS004
BOD, carbonaceous [5 day, 20 C]monthly averagereport only (mg/L)all yearS004
BOD, carbonaceous [5 day, 20 C]monthly maximumreport only (mg/L)all yearS004

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/MN0021831 · MCP: https://passage-data.com/mcp