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American Peat Technology LLC

Minerals, Ground Or Treated, Aitkin, Minnesota. NPDES permit MN0057533, in force until Feb 29, 2028. Last 12 months: over a limit 3 times (last August 2026). Source: EPA ECHO, Oct 22, 2026.

Reports due
About 47 days after each period: outfall D001 form A1 monthly (19 values), outfall D005 form A1 monthly (21 values), outfall D007 form A1 monthly (2 values), outfall D006 form A1 yearly
Renewal application due
Sep 2, 2027 · 180 days before expiry; your permit may set another date
Last report on file
August 2026
Oct 2024 – Sep 2025
2 values over a limit, 0 required values missing, 0 of 37 reports late

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

Period endingParameterReportedLimitOver by
June 2026Phosphorus, total [as P], annual total48.6≤ 45 kg/yr8%
July 2026Phosphorus, total [as P], annual total74.1≤ 45 kg/yr65%
August 2026Phosphorus, total [as P], annual total102.82≤ 45 kg/yr128%

Limits in force (43)

ParameterStatisticLimitMonthsOutfall
pHmonthly minimum≥ 6.5 SUall yearD001
pHmonthly maximum≤ 8.5 SUall yearD001
Solids, total suspendedmonthly average≤ 30 mg/Lall yearD001
Solids, total suspendedmonthly maximum≤ 45 mg/Lall yearD001
Nitrogen, nitrate total [as N]monthly averagereport only (mg/L)all yearD001
Nitrogen, nitrate total [as N]monthly maximumreport only (mg/L)all yearD001
Nitrogen, Kjeldahl, total [as N]monthly averagereport only (mg/L)all yearD001
Nitrogen, Kjeldahl, total [as N]monthly maximumreport only (mg/L)all yearD001
Nitrite + Nitrate total [as N]monthly averagereport only (mg/L)all yearD001
Nitrite + Nitrate total [as N]monthly maximumreport only (mg/L)all yearD001
Phosphorus, total [as P]monthly averagereport only (mg/L)all yearD001
Phosphorus, total [as P]monthly maximumreport only (mg/L)all yearD001
Sulfate, total [as SO4]monthly averagereport only (mg/L)all yearD001
Sulfate, total [as SO4]monthly maximumreport only (mg/L)all yearD001
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all yearD001
Flow, in conduit or thru treatment plantmonthly maximumreport only (MGD)all yearD001
Flow, in conduit or thru treatment plantmonthly totalreport only (Mgal/mo)all yearD001
Mercury, total [as Hg]quarterly average≤ 9.7 ng/LMar, Jun, Sep, DecD001
Mercury, total [as Hg]quarterly maximum≤ 16.8 ng/LMar, Jun, Sep, DecD001
Temperature, water deg. fahrenheitmonthly averagereport only (deg F)all yearD005
Temperature, water deg. fahrenheitmonthly maximumreport only (deg F)all yearD005
pHmonthly minimum≥ 6.5 SUall yearD005
pHmonthly maximum≤ 8.5 SUall yearD005
Solids, total suspendedmonthly average≤ 30 mg/Lall yearD005
Solids, total suspendedmonthly maximum≤ 45 mg/Lall yearD005
Nitrogen, nitrate total [as N]monthly averagereport only (mg/L)all yearD005
Nitrogen, nitrate total [as N]monthly maximumreport only (mg/L)all yearD005
Nitrogen, Kjeldahl, total [as N]monthly averagereport only (mg/L)all yearD005
Nitrogen, Kjeldahl, total [as N]monthly maximumreport only (mg/L)all yearD005
Nitrite + Nitrate total [as N]monthly averagereport only (mg/L)all yearD005
Nitrite + Nitrate total [as N]monthly maximumreport only (mg/L)all yearD005
Phosphorus, total [as P]monthly averagereport only (mg/L)all yearD005
Phosphorus, total [as P]monthly maximumreport only (mg/L)all yearD005
Sulfate, total [as SO4]monthly averagereport only (mg/L)all yearD005
Sulfate, total [as SO4]monthly maximumreport only (mg/L)all yearD005
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all yearD005
Flow, in conduit or thru treatment plantmonthly maximumreport only (MGD)all yearD005
Flow, in conduit or thru treatment plantmonthly totalreport only (Mgal/mo)all yearD005
Mercury, total [as Hg]quarterly average≤ 9.7 ng/LMar, Jun, Sep, DecD005
Mercury, total [as Hg]quarterly maximum≤ 16.8 ng/LMar, Jun, Sep, DecD005
Solids, total suspendedannual maximumreport only (mg/L)all yearD006
Solids, total suspendedannual total≤ 12454 kg/yrall yearD007
Phosphorus, total [as P]annual total≤ 45 kg/yrall yearD007

How strict are these limits?

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

Same industry: the 3 Stone, Clay, Glass and Concrete Products permits in Minnesota.

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On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/MN0057533 · MCP: https://passage-data.com/mcp