AMEREN UE — NPDES permit IL0075906: limits, due date and EPA's record

NPDES permit IL0075906 · Minor NON-POTW · administratively continued, expires 2007-05-31 · EPA's file as of 2026-09-19

This permit expired on 2007-05-31 and is administratively continued: its last limits keep applying until a new permit is issued, and EPA still expects the reports.

EPA's record, 2025-09-01 to 2026-08-31

Reporting

Reports are due about 15 days after each monitoring period ends (read off this permit's own late-day counts in EPA's filings).

Limits in force (23)

Outfall	Parameter	Statistic	Limit	Months
001	Temperature, water deg. fahrenheit	MO MAX	report only	all year
001	pH	MO MIN	>= 6 SU	all year
001	pH	MO MAX	<= 9 SU	all year
001	Solids, total suspended	30DA AVG	<= 15 mg/L	all year
001	Solids, total suspended	DAILY MX	<= 30 mg/L	all year
001	Phosphorus, total [as P]	SX	report only	all year
001	Chloride [as Cl]	SX	report only	all year
001	Sulfate, total [as SO4]	DAILY MX	<= 500 mg/L	all year
001	Oil and grease	30DA AVG	<= 15 mg/L	all year
001	Oil and grease	DAILY MX	<= 30 mg/L	all year
001	Flow, in conduit or thru treatment plant	MO AVG	report only	all year
001	Flow, in conduit or thru treatment plant	DAILY MX	report only	all year
001	Chlorine, total residual	DAILY MX	<= .05 mg/L	all year
001	Solids, total dissolved- 180 deg. C	DAILY MX	<= 1000 mg/L	all year
002	Temperature, water deg. fahrenheit	MO MAX	report only	all year
002	pH	MO MIN	>= 6 SU	all year
002	pH	MO MAX	<= 9 SU	all year
002	Phosphorus, total [as P]	SX	report only	all year
002	Chloride [as Cl]	SX	report only	all year
002	Sulfate, total [as SO4]	DAILY MX	<= 500 mg/L	all year
002	Flow, in conduit or thru treatment plant	MO AVG	report only	all year
002	Flow, in conduit or thru treatment plant	DAILY MX	report only	all year
002	Solids, total dissolved- 180 deg. C	DAILY MX	<= 1000 mg/L	all year