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Dyno Nobel Inc

Explosives, Biwabik, Minnesota. NPDES permit MN0060704, in force until Oct 31, 2030. Last 12 months: over a limit 2 times (last September 2026). Source: EPA ECHO, Oct 22, 2026.

Reports due
About 47 days after each period: outfall D006 form A1 monthly (21 values), outfall W002 form A1 quarterly (3 values), outfall W005 form A1 quarterly (2 values), outfall D004 form A1 yearly, outfall D007 form A1 yearly
Last report on file
September 2026
Oct 2024 – Sep 2025
0 values over a limit, 0 required values missing, 1 of 21 reports late

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

Period endingParameterReportedLimit
May 2026pH, instantaneous maximum9.2≤ 9 SU
September 2026pH, instantaneous maximum9.1≤ 9 SU

Limits in force (38)

ParameterStatisticLimitMonthsOutfall
Solids, total suspendedannual averagereport only (mg/L)all yearD004
Nitrogen, total [as N]annual averagereport only (mg/L)all yearD004
Nitrogen, ammonia total [as N]annual averagereport only (mg/L)all yearD004
Nitrogen, Kjeldahl, total [as N]annual averagereport only (mg/L)all yearD004
Nitrite + Nitrate total [as N]annual averagereport only (mg/L)all yearD004
Specific conductancequarterly averagereport only (umho/cm)Mar, Jun, Sep, DecD006
pHinstantaneous minimum≥ 6 SUall yearD006
pHinstantaneous maximum≤ 9 SUall yearD006
Solids, total suspendedmonthly average≤ 30 mg/Lall yearD006
Nitrogen, total [as N]monthly averagereport only (mg/L)all yearD006
Nitrogen, ammonia total [as N]monthly averagereport only (mg/L)all yearD006
Nitrogen, Kjeldahl, total [as N]monthly averagereport only (mg/L)all yearD006
Nitrite + Nitrate total [as N]monthly averagereport only (mg/L)all yearD006
Phosphorus, total [as P]monthly average≤ 1 mg/Lall yearD006
Chloride [as Cl]monthly averagereport only (mg/L)all yearD006
Sulfate, total [as SO4]quarterly averagereport only (mg/L)Mar, Jun, Sep, DecD006
Copper, total [as Cu]monthly averagereport only (mg/L)all yearD006
Lead, total [as Pb]monthly averagereport only (mg/L)all yearD006
Benzene, ethylbenzene, toluene, xylene combinationquarterly averagereport only (ug/L)Mar, Jun, Sep, DecD006
Hardness, Ca Mg Calculated [mg/L as CaCO3]quarterly averagereport only (mg/L)Mar, Jun, Sep, DecD006
Diesel range organics diesel, total, wtrdaily maximum≤ 5.514 mg/LMar, Jun, Sep, DecD006
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all yearD006
Flow, in conduit or thru treatment plantmonthly maximumreport only (MGD)all yearD006
Flow, in conduit or thru treatment plantmonthly totalreport only (Mgal/mo)all yearD006
Solids, total dissolvedquarterly averagereport only (mg/L)Mar, Jun, Sep, DecD006
Mercury, dissolved [as Hg]daily maximumreport only (ng/L)Jun, DecD006
Mercury, total [as Hg]daily maximumreport only (ng/L)Jun, DecD006
BOD, carbonaceous [5 day, 20 C]monthly average≤ 25 mg/Lall yearD006
Solids, total suspendedannual averagereport only (mg/L)all yearD007
Nitrogen, total [as N]annual averagereport only (mg/L)all yearD007
Nitrogen, ammonia total [as N]annual averagereport only (mg/L)all yearD007
Nitrogen, Kjeldahl, total [as N]annual averagereport only (mg/L)all yearD007
Nitrite + Nitrate total [as N]annual averagereport only (mg/L)all yearD007
pHinstantaneous minimumreport only (SU)all yearW002
pHinstantaneous maximumreport only (SU)all yearW002
Hardness, Ca Mg Calculated [mg/L as CaCO3]monthly averagereport only (mg/L)all yearW002
pHinstantaneous minimumreport only (SU)all yearW005
pHinstantaneous maximumreport only (SU)all yearW005

How strict are these limits?

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

Same industry: the 15 Chemicals and Allied 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/MN0060704 · MCP: https://passage-data.com/mcp