Ameren Missouri

NPDES permit MO0000353 · Major NON-POTW · administratively continued, expires 2022-03-31 · EPA's file as of 2026-09-19

Check this month's numbers before you file

This permit expired on 2022-03-31 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

3values over a limit
0required values missing, on 0 form(s)
4of 64 forms filed late

Last period with anything received: 2026-07-31. Most often over: E. coli (3).

Reporting

Reports are due about 28 days after each monitoring period ends (read off this permit's own late-day counts in EPA's filings).

Limits in force (171)

OutfallParameterStatisticLimitMonths
001Temperature, water deg. fahrenheitDAILY MX <= 78 deg F Oct
001Temperature, water deg. fahrenheitDAILY MX <= 55 deg F Dec
001Temperature, water deg. fahrenheitDAILY MX <= 71 deg F Apr
001Temperature, water deg. fahrenheitDAILY MX <= 60 deg F Mar
001Temperature, water deg. fahrenheitDAILY MX <= 91 deg F Jul, Aug
001Temperature, water deg. fahrenheitDAILY MX <= 68 deg F Nov
001Temperature, water deg. fahrenheitDAILY MX <= 81 deg F May
001Temperature, water deg. fahrenheitDAILY MX <= 48 deg F Jan, Feb
001Temperature, water deg. fahrenheitDAILY MX <= 89 deg F Jun, Sep
001Temperature, water deg. fahrenheitMO AVG report only Oct
001Temperature, water deg. fahrenheitMO AVG report only Dec
001Temperature, water deg. fahrenheitMO AVG report only Apr
001Temperature, water deg. fahrenheitMO AVG report only Mar
001Temperature, water deg. fahrenheitMO AVG report only Jul, Aug
001Temperature, water deg. fahrenheitMO AVG report only Nov
001Temperature, water deg. fahrenheitMO AVG report only Jan, Feb
001Temperature, water deg. fahrenheitMO AVG report only Jun, Sep
001Temp. diff. between up/down stream deg. FDAILY MX <= 5 deg F all year
001Temp. diff. between up/down stream deg. FMO AVG report only all year
001Flow, in conduit or thru treatment plantDAILY MX report only all year
001Flow, in conduit or thru treatment plantMO AVG report only all year
001Chlorine, total residualDAILY MX <= 200 ug/L all year
001Chlorine, free availableDAILY MX <= 500 ug/L all year
001Chlorine, free availableMO AVG <= 200 ug/L all year
001Toxicity [acute], Ceriodaphnia dubiaVALUE report only all year
001Toxicity [acute], Pimephales promelas [Fathead Minnow]VALUE report only all year
001Stream flow, estimatedDAILY MX report only all year
001Stream flow, estimatedMO AVG report only all year
001Flow, process wastewaterDAILY MX report only all year
001Flow, process wastewaterMO AVG report only all year
001Month excursion time [min]ANNL TOT <= 438 hr all year
002pHMINIMUM >= 6.5 SU all year
002pHMAXIMUM <= 9 SU all year
002Solids, total suspendedDAILY MX report only all year
002Solids, total suspendedMO AVG report only all year
002Solids, Total Suspended, Net ValueDAILY MX <= 100 mg/L all year
002Solids, Total Suspended, Net ValueMO AVG <= 30 mg/L all year
002Oil and grease [soxhlet extr.] tot.DAILY MX <= 15 mg/L all year
002Oil and grease [soxhlet extr.] tot.MO AVG <= 10 mg/L all year
002Nitrogen, total [as N]DAILY MX report only all year
002Nitrogen, ammonia total [as N]DAILY MX report only all year
002Nitrogen, Kjeldahl, total [as N]DAILY MX report only all year
002Nitrite + Nitrate total [as N]DAILY MX report only all year
002Phosphorus, total [as P]DAILY MX report only all year
002Cyanide, free [amenable to chlorination]DAILY MX report only all year
002Sulfate, total [as SO4]DAILY MX report only all year
002FluorideDAILY MX report only all year
002Arsenic, total recoverableDAILY MX report only all year
002Iron, total recoverableDAILY MX report only all year
002Selenium, total recoverableDAILY MX report only all year
002Titanium, total recoverableDAILY MX report only all year
002Boron, total recoverableDAILY MX report only all year
002Aluminum, total recoverableDAILY MX report only all year
002Molybdenum, total recoverableDAILY MX report only all year
002Chromium, hexavalent dissolved [as Cr]DAILY MX report only all year
002ChlorideDAILY MX report only all year
002Flow, in conduit or thru treatment plantDAILY MX report only all year
002Flow, in conduit or thru treatment plantMO AVG report only all year
002Toxicity [chronic], Ceriodaphnia dubiaVALUE report only all year
002Toxicity [chronic], Pimephales promelas [Fathead Minnow]VALUE report only all year
002Chlorides + SulfatesDAILY MX report only all year
003pHMINIMUM report only all year
003pHMAXIMUM report only all year
003Solids, total suspendedDAILY MX report only all year
003Oil and grease [soxhlet extr.] tot.DAILY MX report only all year
003Nitrogen, total [as N]DAILY MX report only all year
003Phosphorus, total [as P]DAILY MX report only all year
003Hardness, total [as CaCO3]DAILY MX report only all year
003Sulfate, total [as SO4]DAILY MX report only all year
003ChlorideDAILY MX report only all year
003Flow, in conduit or thru treatment plantDAILY MX report only all year
003Chlorides + SulfatesDAILY MX report only all year
006pHMINIMUM >= 6.5 SU all year
006pHMAXIMUM <= 9 SU all year
006Solids, total suspendedDAILY MX report only all year
006Solids, total suspendedMO AVG report only all year
006Solids, Total Suspended, Net ValueDAILY MX <= 100 mg/L all year
006Solids, Total Suspended, Net ValueMO AVG <= 30 mg/L all year
006Oil and grease [soxhlet extr.] tot.DAILY MX <= 15 mg/L all year
006Oil and grease [soxhlet extr.] tot.MO AVG <= 10 mg/L all year
006Nitrogen, total [as N]DAILY MX report only all year
006Nitrogen, ammonia total [as N]DAILY MX report only all year
006Nitrogen, Kjeldahl, total [as N]DAILY MX report only all year
006Nitrite + Nitrate total [as N]DAILY MX report only all year
006Phosphorus, total [as P]DAILY MX report only all year
006Cyanide, free [amenable to chlorination]DAILY MX report only all year
006Sulfate, total [as SO4]DAILY MX report only all year
006FluorideDAILY MX report only all year
006Arsenic, total recoverableDAILY MX report only all year
006Iron, total recoverableDAILY MX report only all year
006Selenium, total recoverableDAILY MX report only all year
006Titanium, total recoverableDAILY MX report only all year
006Boron, total recoverableDAILY MX report only all year
006Aluminum, total recoverableDAILY MX report only all year
006Molybdenum, total recoverableDAILY MX report only all year
006Chromium, hexavalent dissolved [as Cr]DAILY MX report only all year
006ChlorideDAILY MX report only all year
006Flow, in conduit or thru treatment plantDAILY MX report only all year
006Flow, in conduit or thru treatment plantMO AVG report only all year
006Toxicity [chronic], Ceriodaphnia dubiaVALUE report only all year
006Toxicity [chronic], Pimephales promelas [Fathead Minnow]VALUE report only all year
006Chlorides + SulfatesDAILY MX report only all year
007pHMINIMUM report only all year
007pHMAXIMUM report only all year
007Solids, total suspendedDAILY MX report only all year
007Oil and grease [soxhlet extr.] tot.DAILY MX report only all year
007Nitrogen, total [as N]DAILY MX report only all year
007Nitrite + Nitrate total [as N]DAILY MX <= 17 mg/L all year
007Nitrite + Nitrate total [as N]MO AVG <= 4.4 mg/L all year
007Phosphorus, total [as P]DAILY MX report only all year
007Sulfate, total [as SO4]DAILY MX report only all year
007Arsenic, total recoverableDAILY MX <= 11 ug/L all year
007Arsenic, total recoverableMO AVG <= 8 ug/L all year
007Selenium, total recoverableDAILY MX <= 23 ug/L all year
007Selenium, total recoverableMO AVG <= 12 ug/L all year
007ChlorideDAILY MX report only all year
007Flow, in conduit or thru treatment plantDAILY MX report only all year
007Mercury, total recoverableDAILY MX <= 788 ng/L all year
007Mercury, total recoverableMO AVG <= 356 ng/L all year
007Chlorides + SulfatesDAILY MX report only all year
009pHMINIMUM >= 6 SU all year
009pHMAXIMUM <= 9 SU all year
009Solids, total suspendedDAILY MX report only all year
009Solids, total suspendedMO AVG report only all year
009Solids, total suspendedDAILY MX <= 100 mg/L all year
009Solids, total suspendedMO AVG <= 30 mg/L all year
009Oil and grease [soxhlet extr.] tot.DAILY MX <= 15 mg/L all year
009Oil and grease [soxhlet extr.] tot.MO AVG <= 10 mg/L all year
009Nitrogen, total [as N]DAILY MX report only all year
009Nitrogen, ammonia total [as N]DAILY MX report only all year
009Nitrogen, Kjeldahl, total [as N]DAILY MX report only all year
009Nitrite + Nitrate total [as N]DAILY MX report only all year
009Phosphorus, total [as P]DAILY MX report only all year
009Cyanide, free [amenable to chlorination]DAILY MX report only all year
009Sulfate, total [as SO4]DAILY MX report only all year
009FluorideDAILY MX report only all year
009Arsenic, total recoverableDAILY MX report only all year
009Iron, total recoverableDAILY MX report only all year
009Selenium, total recoverableDAILY MX report only all year
009Titanium, total recoverableDAILY MX report only all year
009Boron, total recoverableDAILY MX report only all year
009Aluminum, total recoverableDAILY MX report only all year
009Molybdenum, total recoverableDAILY MX report only all year
009Chromium, hexavalent dissolved [as Cr]DAILY MX report only all year
009ChlorideDAILY MX report only all year
009Flow, in conduit or thru treatment plantDAILY MX report only all year
009Flow, in conduit or thru treatment plantMO AVG report only all year
009Toxicity [chronic], Ceriodaphnia dubiaDAILY MX report only all year
009Toxicity [chronic], Pimephales promelas [Fathead Minnow]DAILY MX report only all year
009Chlorides + SulfatesDAILY MX report only all year
010pHMINIMUM report only all year
010pHMAXIMUM report only all year
010Solids, total suspendedDAILY MX report only all year
010Oil and grease [soxhlet extr.] tot.DAILY MX report only all year
010Nitrogen, total [as N]DAILY MX report only all year
010Phosphorus, total [as P]DAILY MX report only all year
010Hardness, total [as CaCO3]DAILY MX report only all year
010Sulfate, total [as SO4]DAILY MX report only all year
010ChlorideDAILY MX report only all year
010Flow, in conduit or thru treatment plantDAILY MX report only all year
010Chlorides + SulfatesDAILY MX report only all year
09ABOD, 5-day, 20 deg. CDAILY MX <= 45 mg/L all year
09ABOD, 5-day, 20 deg. CMO AVG <= 30 mg/L all year
09ApHMINIMUM >= 6 SU all year
09ApHMAXIMUM <= 9 SU all year
09ASolids, total suspendedDAILY MX <= 45 mg/L all year
09ASolids, total suspendedMO AVG <= 30 mg/L all year
09AFlow, in conduit or thru treatment plantDAILY MX report only all year
09AFlow, in conduit or thru treatment plantMO AVG report only all year
09AE. coliGEO MEAN <= 630 #/100mL Apr, May, Jun, Jul, Aug, Sep, Oct, Nov, Dec
09AE. coli30DA GM <= 126 #/100mL Apr, May, Jun, Jul, Aug, Sep, Oct, Nov, Dec

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