UNION ELECTRIC COMPANY dba AMEREN MISSOURI

NPDES permit IA0033600 · Minor NON-POTW · effective, expires 2027-07-31 · 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

2values over a limit
0required values missing, on 0 form(s)
0of 36 forms filed late

Last period with anything received: 2026-08-31. Most often over: Solids, total suspended (1), Oil & Grease (1).

Reporting

Reports are due about 15 days after each monitoring period ends (the most common figure among IA permits in EPA's filings — check your permit).

Limits in force (25)

OutfallParameterStatisticLimitMonths
012pHDAILY MN >= 6 SU all year
012pHDAILY MX <= 9 SU all year
012Solids, total suspended30DA AVG <= 30 mg/L all year
012Solids, total suspended7 DA AVG <= 45 mg/L all year
012Oil & Grease30DA AVG <= 10 mg/L all year
012Oil & GreaseDAILY MX <= 15 mg/L all year
027pHDAILY MN >= 6 SU all year
027pHDAILY MX <= 9 SU all year
027Solids, total suspended30DA AVG <= 30 mg/L all year
027Solids, total suspended7 DA AVG <= 45 mg/L all year
027Solids, total suspended30DA AVG report only all year
027Solids, total suspendedDAILY MX report only all year
027Oil & Grease30DA AVG <= 15 mg/L all year
027Oil & GreaseDAILY MX <= 20 mg/L all year
035pHDAILY MN >= 6 SU all year
035pHDAILY MX <= 9 SU all year
035Solids, total suspended30DA AVG <= 30 mg/L all year
035Solids, total suspended7 DA AVG <= 45 mg/L all year
035Solids, total suspended30DA AVG <= .25 lb/d all year
035Solids, total suspended7 DA AVG <= .38 lb/d all year
035E. coliGEO MEAN <= 126 #/100mL Mar, Apr, May, Jun, Jul, Aug, Sep, Oct, Nov
035BOD, carbonaceous [5 day, 20 C]30DA AVG <= 25 mg/L all year
035BOD, carbonaceous [5 day, 20 C]7 DA AVG <= 40 mg/L all year
035BOD, carbonaceous [5 day, 20 C]30DA AVG <= .21 lb/d all year
035BOD, carbonaceous [5 day, 20 C]7 DA AVG <= .33 lb/d 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