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The Doe Run Resources Corp

Lead And Zinc Ores, major discharger, Ellington, Missouri. NPDES permit MO0001881, in force until Oct 31, 2030. Last 12 months: over a limit 2 times (last December 2025). Source: EPA ECHO, Oct 22, 2026.

Reports due
About 28 days after each period: outfall 002 form M monthly (16 values), outfall 015 form M monthly (8 values), outfall 002 form A yearly
Last report on file
August 2026
Oct 2024 – Sep 2025
0 values over a limit, 0 required values missing, 0 of 33 reports late

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

Period endingParameterReportedLimitOver by
December 2025Zinc, total recoverable, daily maximum310≤ 272 ug/L14%
December 2025Zinc, total recoverable, monthly average195.5≤ 128.5 ug/L52%

Limits in force (30)

ParameterStatisticLimitMonthsOutfall
pHminimum≥ 6.5 SUall year002
pHmaximum≤ 9 SUall year002
Solids, total suspendeddaily maximum≤ 30 mg/Lall year002
Solids, total suspendedmonthly average≤ 20 mg/Lall year002
Cobalt, total recoverabledaily maximumreport only (ug/L)all year002
Cobalt, total recoverablemonthly averagereport only (ug/L)all year002
Iron, total recoverabledaily maximumreport only (ug/L)all year002
Iron, total recoverablemonthly averagereport only (ug/L)all year002
Zinc, total recoverabledaily maximum≤ 272 ug/Lall year002
Zinc, total recoverablemonthly average≤ 128.5 ug/Lall year002
Cadmium, total recoverabledaily maximum≤ 2 ug/Lall year002
Cadmium, total recoverablemonthly average≤ 1 ug/Lall year002
Lead, total recoverabledaily maximum≤ 28 ug/Lall year002
Lead, total recoverablemonthly average≤ 13.9 ug/Lall year002
Copper, total recoverabledaily maximum≤ 34.3 ug/Lall year002
Copper, total recoverablemonthly average≤ 21.1 ug/Lall year002
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year002
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year002
Toxicity [chronic], Ceriodaphnia dubiadaily maximum≤ 1.6 toxicall year002
Toxicity [chronic], Pimephales promelas [Fathead Minnow]daily maximum≤ 1.6 toxicall year002
Mercury, total [as Hg]daily maximum≤ 2 ug/Lall year002
Mercury, total [as Hg]monthly average≤ 1 ug/Lall year002
pHdaily maximumreport only (SU)all year015
Solids, total suspendeddaily maximumreport only (mg/L)all year015
Zinc, total recoverabledaily maximumreport only (ug/L)all year015
Cadmium, total recoverabledaily maximumreport only (ug/L)all year015
Lead, total recoverabledaily maximumreport only (ug/L)all year015
Copper, total recoverabledaily maximumreport only (ug/L)all year015
Rainfalldaily maximumreport only (in)all year015
Mercury, total [as Hg]daily maximumreport only (ug/L)all year015

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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Your permit document is the final word. As JSON: /api/v1/permits/MO0001881 · MCP: https://passage-data.com/mcp