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Union Electric d/b/a Ameren Missouri

Electric Services, Annapolis, Missouri. NPDES permit MO0001082 expired Dec 31, 2024; its limits still apply. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 28 days after each period: outfall 001 form SQ quarterly (8 values), outfall 003 form CQ quarterly (4 values), outfall 004 form CQ quarterly (4 values), outfall 006 form OM monthly (1 value)
Last report on file
September 2026
Oct 2024 – Sep 2025
0 values over a limit, 0 required values missing, 0 of 24 reports late

Limits in force (17)

ParameterStatisticLimitMonthsOutfall
pHminimum≥ 6.5 SUall year001
pHmaximum≤ 9 SUall year001
Solids, total suspendeddaily maximum≤ 100 mg/Lall year001
Solids, total suspendedmonthly average≤ 30 mg/Lall year001
Oil and grease [soxhlet extr.] tot.daily maximum≤ 15 mg/Lall year001
Oil and grease [soxhlet extr.] tot.monthly average≤ 10 mg/Lall year001
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year001
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year001
Temperature, water deg. fahrenheitdaily maximumreport only (deg F)all year003
Temperature, water deg. fahrenheitmonthly averagereport only (deg F)all year003
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year003
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year003
Temperature, water deg. fahrenheitdaily maximumreport only (deg F)all year004
Temperature, water deg. fahrenheitmonthly averagereport only (deg F)all 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
Freeboarddaily minimumreport only (ft)all year006

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.

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On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/MO0001082 · MCP: https://passage-data.com/mcp