Missouri Mining Investments, LLC

NPDES permit MO0098752 · Major NON-POTW · effective, expires 2029-06-30 · EPA's file as of 2026-09-19

Check this month's numbers before you file

EPA's record, 2025-09-01 to 2026-08-31

94values over a limit
0required values missing, on 0 form(s)
0of 72 forms filed late

Last period with anything received: 2026-07-31. Most often over: Nickel, total recoverable (20), Copper, total recoverable (19), Cobalt, total recoverable (11).

Reporting

Reports are due about 28 days after each monitoring period ends (the most common figure among MO permits in EPA's filings — check your permit).

Limits in force (84)

OutfallParameterStatisticLimitMonths
001Sulfate [as S]DAILY MX report only all year
001Sulfate [as S]MO AVG report only all year
001pHMINIMUM >= 6.5 SU all year
001pHMAXIMUM <= 9 SU all year
001Solids, total suspendedDAILY MX <= 45 mg/L all year
001Solids, total suspendedMO AVG <= 30 mg/L all year
001Oil and grease [soxhlet extr.] tot.DAILY MX report only all year
001Oil and grease [soxhlet extr.] tot.MO AVG report only all year
001Cyanide, total [as CN]DAILY MX report only all year
001Cyanide, total [as CN]MO AVG report only all year
001Arsenic, total recoverableDAILY MX report only all year
001Arsenic, total recoverableMO AVG report only all year
001Cobalt, total recoverableDAILY MX <= 1103 ug/L all year
001Cobalt, total recoverableMO AVG <= 693 ug/L all year
001Nickel, total recoverableDAILY MX <= 80.9 ug/L all year
001Nickel, total recoverableMO AVG <= 49.9 ug/L all year
001Zinc, total recoverableDAILY MX <= 130.2 ug/L all year
001Zinc, total recoverableMO AVG <= 87 ug/L all year
001Cadmium, total recoverableDAILY MX <= .5 ug/L all year
001Cadmium, total recoverableMO AVG <= .2 ug/L all year
001Lead, total recoverableDAILY MX <= 6.5 ug/L all year
001Lead, total recoverableMO AVG <= 2.2 ug/L all year
001ChlorideDAILY MX report only all year
001ChlorideMO AVG report only all year
001Flow, in conduit or thru treatment plantDAILY MX report only all year
001Flow, in conduit or thru treatment plantMO AVG report only all year
001Toxicity [acute], Ceriodaphnia dubiaVALUE <= .3 toxic all year
001Toxicity [acute], Pimephales promelas [Fathead Minnow]VALUE <= .3 toxic all year
001Chlorides + SulfatesDAILY MX <= 1000 mg/L all year
001Chlorides + SulfatesMO AVG <= 1000 mg/L all year
002Sulfate [as S]DAILY MX report only all year
002Sulfate [as S]MO AVG report only all year
002pHMINIMUM >= 6.5 SU all year
002pHMAXIMUM <= 9 SU all year
002Solids, total suspendedDAILY MX <= 45 mg/L all year
002Solids, total suspendedMO AVG <= 30 mg/L all year
002Oil and grease [soxhlet extr.] tot.DAILY MX report only all year
002Oil and grease [soxhlet extr.] tot.MO AVG report only all year
002Cyanide, total [as CN]DAILY MX report only all year
002Cyanide, total [as CN]MO AVG report only all year
002Cobalt, total recoverableDAILY MX <= 1103 ug/L all year
002Cobalt, total recoverableMO AVG <= 693 ug/L all year
002Arsenic, total [as As]DAILY MX report only all year
002Arsenic, total [as As]MO AVG report only all year
002Nickel, total recoverableDAILY MX <= 80.9 ug/L all year
002Nickel, total recoverableMO AVG <= 49.9 ug/L all year
002Zinc, total recoverableDAILY MX <= 130.2 ug/L all year
002Zinc, total recoverableMO AVG <= 87 ug/L all year
002Cadmium, total recoverableDAILY MX <= .5 ug/L all year
002Cadmium, total recoverableMO AVG <= .2 ug/L all year
002Lead, total recoverableDAILY MX <= 6.5 ug/L all year
002Lead, total recoverableMO AVG <= 2.2 ug/L all year
002Copper, total recoverableDAILY MX <= 15.3 ug/L all year
002Copper, total recoverableMO AVG <= 5.6 ug/L all year
002ChlorideDAILY MX report only all year
002ChlorideMO AVG report only all year
002Flow, in conduit or thru treatment plantDAILY MX report only all year
002Flow, in conduit or thru treatment plantMO AVG report only all year
002Toxicity [acute], Ceriodaphnia dubiaVALUE <= .3 toxic all year
002Toxicity [acute], Pimephales promelas [Fathead Minnow]VALUE <= .3 toxic all year
002Chlorides + SulfatesDAILY MX <= 1000 mg/L all year
002Chlorides + SulfatesMO AVG <= 1000 mg/L all year
006FreeboardDAILY MN >= 2 ft all year
006FreeboardMO AVG report only all year
008Oxygen demand, chem. [high level] [COD]DAILY MX report only all year
008pHMINIMUM report only all year
008pHMAXIMUM report only all year
008Solids, total suspendedDAILY MX report only all year
008Oil and grease [soxhlet extr.] tot.DAILY MX report only all year
008Cyanide, total [as CN]DAILY MX report only all year
008Arsenic, total recoverableDAILY MX report only all year
008Cobalt, total recoverableDAILY MX report only all year
008Nickel, total recoverableDAILY MX report only all year
008Zinc, total recoverableDAILY MX report only all year
008Cadmium, total recoverableDAILY MX report only all year
008Lead, total recoverableDAILY MX report only all year
008Copper, total recoverableDAILY MX report only all year
008Storm water flowDAILY MX report only all year
009FreeboardDAILY MN >= 2 ft all year
009FreeboardMO AVG report only all year
MDWSulfate [as S]DAILY MX report only all year
MDWSulfate [as S]MO AVG report only all year
MDWChlorides + SulfatesDAILY MX report only all year
MDWChlorides + SulfatesMO AVG report only all year

Built from EPA's ECHO bulk files. EPA's file, not the permit document, is the source: read your permit. Check a report before you file it · All states