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Milestone Materials

Construction Sand And Gravel, Rochester, Minnesota. NPDES permit MN0062227, in force until Apr 30, 2031. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 47 days after each period: outfall D001 form A1 monthly (10 values), outfall D002 form A1 monthly (10 values)
Last report on file
September 2026
Oct 2024 – Sep 2025
0 values over a limit, 0 required values missing, 0 of 24 reports late

Limits in force (26)

ParameterStatisticLimitMonthsOutfall
pHmonthly minimum≥ 6 SUMar, Jun, Sep, DecD001
pHmonthly maximum≤ 9 SUMar, Jun, Sep, DecD001
Solids, total suspendedmonthly average≤ 30 mg/LMar, Jun, Sep, DecD001
Solids, total suspendedmonthly maximum≤ 45 mg/LMar, Jun, Sep, DecD001
Solids, total suspendedmonthly average≤ 1868 kg/dMar, Jun, Sep, DecD001
Nitrogen, total [as N]monthly maximumreport only (mg/L)DecD001
Nitrogen, Kjeldahl, total [as N]monthly maximumreport only (mg/L)DecD001
Nitrite + Nitrate total [as N]monthly maximumreport only (mg/L)DecD001
Phosphorus, total [as P]monthly maximumreport only (mg/L)Jun, SepD001
Sulfate, total [as SO4]quarterly maximumreport only (mg/L)Mar, Jun, Sep, DecD001
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
pHmonthly minimum≥ 6 SUMar, Jun, Sep, DecD002
pHmonthly maximum≤ 9 SUMar, Jun, Sep, DecD002
Solids, total suspendedmonthly average≤ 30 mg/LMar, Jun, Sep, DecD002
Solids, total suspendedmonthly maximum≤ 45 mg/LMar, Jun, Sep, DecD002
Solids, total suspendedmonthly average≤ 1868 kg/dMar, Jun, Sep, DecD002
Nitrogen, total [as N]monthly maximumreport only (mg/L)DecD002
Nitrogen, Kjeldahl, total [as N]monthly maximumreport only (mg/L)DecD002
Nitrite + Nitrate total [as N]monthly maximumreport only (mg/L)DecD002
Phosphorus, total [as P]monthly maximumreport only (mg/L)Jun, SepD002
Sulfate, total [as SO4]quarterly maximumreport only (mg/L)Mar, Jun, Sep, DecD002
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all yearD002
Flow, in conduit or thru treatment plantmonthly maximumreport only (MGD)all yearD002
Flow, in conduit or thru treatment plantmonthly totalreport only (Mgal/mo)all yearD002

How strict are these limits?

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

Same industry: the 13 Mining and Quarrying of Nonmetallic Minerals 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/MN0062227 · MCP: https://passage-data.com/mcp