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Caldera Holding LLC

Iron Ores, major discharger, Sullivan, Missouri. NPDES permit MO0000574, in force until Jun 30, 2027. Last 12 months: over a limit 8 times (last August 2026), 2 required values missing, 4 of 12 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 28 days after each period: form M monthly (44 values), form WA yearly
Renewal application due
Jan 1, 2027 · 180 days before expiry; your permit may set another date
Last report on file
August 2026
Oct 2024 – Sep 2025
1 value over a limit, 0 required values missing, 1 of 13 reports late

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

Period endingParameterReportedLimitOver by
June 2026Copper, total recoverable, monthly average< 15≤ 9.3 ug/L61%
June 2026Iron, total recoverable, monthly average1330≤ 438.2 ug/L204%
June 2026Lead, total recoverable, monthly average< 5≤ 3.7 ug/L35%
July 2026Copper, total recoverable, monthly average< 15≤ 9.3 ug/L61%
July 2026Lead, total recoverable, monthly average< 5≤ 3.7 ug/L35%
August 2026Copper, total recoverable, monthly average< 15≤ 9.3 ug/L61%
August 2026Lead, total recoverable, monthly average< 5≤ 3.7 ug/L35%
August 2026Solids, total suspended, daily maximum> 4≤ 30 mg/L—

Limits in force (46)

ParameterStatisticLimitMonths
Oxygen demand, chem. [high level] [COD]daily maximumreport only (mg/L)all year
Oxygen demand, chem. [high level] [COD]monthly averagereport only (mg/L)all year
pHminimum≥ 6.5 SUall year
pHmaximum≤ 9 SUall year
Solids, total suspendeddaily maximum≤ 30 mg/Lall year
Solids, total suspendedmonthly average≤ 20 mg/Lall year
Oil and grease [soxhlet extr.] tot.daily maximum≤ 15 mg/Lall year
Oil and grease [soxhlet extr.] tot.monthly average≤ 10 mg/Lall year
Sulfate, total [as SO4]daily maximumreport only (mg/L)all year
Sulfate, total [as SO4]monthly averagereport only (mg/L)all year
Arsenic, total recoverabledaily maximumreport only (ug/L)all year
Arsenic, total recoverablemonthly averagereport only (ug/L)all year
Iron, total recoverabledaily maximum≤ 1462.8 ug/Lall year
Iron, total recoverablemonthly average≤ 438.2 ug/Lall year
Selenium, total recoverabledaily maximumreport only (ug/L)all year
Selenium, total recoverablemonthly averagereport only (ug/L)all year
Thallium, total recoverabledaily maximumreport only (ug/L)all year
Thallium, total recoverablemonthly averagereport only (ug/L)all year
Beryllium, total recoverable [as Be]daily maximumreport only (ug/L)all year
Beryllium, total recoverable [as Be]monthly averagereport only (ug/L)all year
Nickel, total recoverabledaily maximumreport only (ug/L)all year
Nickel, total recoverablemonthly averagereport only (ug/L)all year
Silver total recoverabledaily maximum≤ 9.4 ug/Lall year
Silver total recoverablemonthly average≤ 3.8 ug/Lall year
Zinc, total recoverabledaily maximum≤ 188.2 ug/Lall year
Zinc, total recoverablemonthly average≤ 56.8 ug/Lall year
Aluminum, total recoverabledaily maximum≤ 750 ug/Lall year
Aluminum, total recoverablemonthly average≤ 248.5 ug/Lall year
Cadmium, total recoverabledaily maximumreport only (ug/L)all year
Cadmium, total recoverablemonthly averagereport only (ug/L)all year
Lead, total recoverabledaily maximum≤ 11.1 ug/Lall year
Lead, total recoverablemonthly average≤ 3.7 ug/Lall year
Copper, total recoverabledaily maximum≤ 23.1 ug/Lall year
Copper, total recoverablemonthly average≤ 9.3 ug/Lall year
Chromium, hexavalent dissolved [as Cr]daily maximumreport only (ug/L)all year
Chromium, hexavalent dissolved [as Cr]monthly averagereport only (ug/L)all year
Chromium, trivalent total recoverabledaily maximumreport only (ug/L)all year
Chromium, trivalent total recoverablemonthly averagereport only (ug/L)all year
Chloridedaily maximumreport only (mg/L)all year
Chloridemonthly averagereport only (mg/L)all year
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year
Toxicity [acute], Ceriodaphnia dubiadaily maximumreport only (toxic)all year
Toxicity [acute], Pimephales promelas [Fathead Minnow]daily maximumreport only (toxic)all year
Chlorides + Sulfatesdaily maximumreport only (mg/L)all year
Chlorides + Sulfatesmonthly averagereport only (mg/L)all year

How strict are these limits?

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

Same industry: the 12 Metal Mining 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/MO0000574 · MCP: https://passage-data.com/mcp