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Ameren-Missouri

Electric Services, major discharger, St. Louis, Missouri. NPDES permit MO0000361, in force until May 31, 2029. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 28 days after each period: form M monthly (16 values)
Last report on file
August 2026
Oct 2024 – Sep 2025
1 value over a limit, 0 required values missing, 0 of 12 reports late

Limits in force (16)

ParameterStatisticLimitMonths
pHminimum≥ 6.5 SUall year
pHmaximum≤ 9 SUall year
Solids, total suspendeddaily maximum≤ 100 mg/Lall year
Solids, total suspendedmonthly average≤ 30 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
Boron, total recoverabledaily maximum≤ 2000 ug/Lall year
Boron, total recoverablemonthly averagereport only (ug/L)all year
Chromium, total [as Cr]daily maximumreport only (ug/L)all year
Chromium, total [as Cr]monthly averagereport only (ug/L)all year
Aluminum, total recoverabledaily maximum≤ 1865 ug/Lall year
Aluminum, total recoverablemonthly averagereport only (ug/L)all year
Chromium, hexavalent dissolved [as Cr]daily maximum≤ 50 ug/Lall year
Chromium, hexavalent dissolved [as Cr]monthly averagereport only (ug/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

How strict are these limits?

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

Same industry: the 29 Electric Services permits in Missouri.

Check this month's numbers Email me before each report is due

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On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/MO0000361 · MCP: https://passage-data.com/mcp