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Magnitude 7 Metals LLC

Primary Aluminum, major discharger, Marston, Missouri. NPDES permit MO0105732 expired Sep 30, 2024; its limits still apply. Last 12 months: no values over a limit, 1 of 28 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 28 days after each period: outfall 001 form Q quarterly (16 values), outfall 002 form Q quarterly (18 values), outfall 003 form Q quarterly (16 values), outfall 004 form M monthly (10 values), outfall 006 form Q quarterly (18 values)
Last report on file
September 2026
Oct 2024 – Sep 2025
0 values over a limit, 0 required values missing, 0 of 28 reports late

Limits in force (78)

ParameterStatisticLimitMonthsOutfall
pHminimum≥ 6 SUall year001
pHmaximum≤ 9 SUall year001
Solids, total suspendeddaily maximum≤ 2262 lb/dall year001
Solids, total suspendedmonthly average≤ 1131 lb/dall year001
Fluoride, total [as F]daily maximum≤ 59.63 lb/dall year001
Fluoride, total [as F]monthly average≤ 26.46 lb/dall year001
Nickel, total recoverabledaily maximum≤ .551 lb/dall year001
Nickel, total recoverablemonthly average≤ .371 lb/dall year001
Aluminum, total recoverabledaily maximum≤ 6.123 lb/dall year001
Aluminum, total recoverablemonthly average≤ 2.716 lb/dall year001
Antimony, total recoverabledaily maximum≤ 1.934 lb/dall year001
Antimony, total recoverablemonthly average≤ .862 lb/dall year001
Benzo[a]pyrenedaily maximum≤ 0 ug/Lall year001
Benzo[a]pyrenemonthly average≤ 0 ug/Lall year001
Flowdaily maximumreport only (MGD)all year001
Flowmonthly averagereport only (MGD)all year001
pHminimum≥ 7 SUall year002
pHmaximum≤ 10 SUall year002
Solids, total suspendeddaily maximum≤ 5.283 lb/dall year002
Solids, total suspendedmonthly average≤ 4.226 lb/dall year002
Oil and grease [soxhlet extr.] tot.daily maximum≤ 3.52 lb/dall year002
Oil and grease [soxhlet extr.] tot.monthly average≤ 3.52 lb/dall year002
Fluoride, total [as F]daily maximum≤ 20.96 lb/dall year002
Fluoride, total [as F]monthly average≤ 9.298 lb/dall year002
Nickel, total recoverabledaily maximum≤ .194 lb/dall year002
Nickel, total recoverablemonthly average≤ .13 lb/dall year002
Aluminum, total recoverabledaily maximum≤ 2.152 lb/dall year002
Aluminum, total recoverablemonthly average≤ .954 lb/dall year002
Antimony, total recoverabledaily maximum≤ .679 lb/dall year002
Antimony, total recoverablemonthly average≤ .303 lb/dall year002
Benzo[a]pyrenedaily maximum≤ .012 lb/dall year002
Benzo[a]pyrenemonthly average≤ .005 lb/dall year002
Flowdaily maximumreport only (MGD)all year002
Flowmonthly averagereport only (MGD)all year002
pHminimum≥ 6 SUall year003
pHmaximum≤ 9 SUall year003
Solids, total suspendeddaily maximum≤ 830.1 lb/dall year003
Solids, total suspendedmonthly average≤ 415 lb/dall year003
Fluoride, total [as F]daily maximum≤ 1.712 lb/dall year003
Fluoride, total [as F]monthly average≤ .76 lb/dall year003
Nickel, total recoverabledaily maximum≤ .016 lb/dall year003
Nickel, total recoverablemonthly average≤ .011 lb/dall year003
Aluminum, total recoverabledaily maximum≤ .176 lb/dall year003
Aluminum, total recoverablemonthly average≤ .078 lb/dall year003
Antimony, total recoverabledaily maximum≤ .056 lb/dall year003
Antimony, total recoverablemonthly average≤ .025 lb/dall year003
Benzo[a]pyrenedaily maximum≤ 0 ug/Lall year003
Benzo[a]pyrenemonthly average≤ 0 ug/Lall year003
Flowdaily maximumreport only (MGD)all year003
Flowmonthly averagereport only (MGD)all year003
pHminimum≥ 6.5 SUall year004
pHmaximum≤ 9 SUall year004
Solids, total suspendeddaily maximum≤ 100 mg/Lall year004
Solids, total suspendedmonthly average≤ 50 mg/Lall year004
Oil and grease [soxhlet extr.] tot.daily maximum≤ 15 mg/Lall year004
Oil and grease [soxhlet extr.] tot.monthly average≤ 10 mg/Lall year004
Aluminum, total recoverabledaily maximum≤ 7537 ug/Lall year004
Aluminum, total recoverablemonthly average≤ 3757 ug/Lall year004
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year004
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year004
pHminimum≥ 6 SUall year006
pHmaximum≤ 9 SUall year006
Solids, total suspendeddaily maximum≤ .264 lb/dall year006
Solids, total suspendedmonthly average≤ .211 lb/dall year006
Oil and grease [soxhlet extr.] tot.daily maximum≤ .18 lb/dall year006
Oil and grease [soxhlet extr.] tot.monthly average≤ .18 lb/dall year006
Fluoride, total [as F]daily maximum≤ 1.048 lb/dall year006
Fluoride, total [as F]monthly average≤ .465 lb/dall year006
Nickel, total recoverabledaily maximum≤ .01 lb/dall year006
Nickel, total recoverablemonthly average≤ .006 lb/dall year006
Aluminum, total recoverabledaily maximum≤ .108 lb/dall year006
Aluminum, total recoverablemonthly average≤ .048 lb/dall year006
Antimony, total recoverabledaily maximum≤ .034 lb/dall year006
Antimony, total recoverablemonthly average≤ .015 lb/dall year006
Benzo[a]pyrenedaily maximum≤ 0 ug/Lall year006
Benzo[a]pyrenemonthly average≤ 0 ug/Lall year006
Flowdaily maximumreport only (MGD)all year006
Flowmonthly averagereport only (MGD)all year006

How strict are these limits?

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

Same industry: the 5 Primary Metal Industries permits in Missouri.

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On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/MO0105732 · MCP: https://passage-data.com/mcp