CORSICANA, CITY OF

NPDES permit TX0056731 · Major POTW · administratively continued, expires 2025-08-10 · EPA's file as of 2026-09-19

Check this month's numbers before you file
Watch this permit — $79 a month. Every Monday, from EPA's newest files: the next report due and when, whether EPA's file holds your last one, any change to this permit's limits or status, and the renewal date.

This permit expired on 2025-08-10 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

0values over a limit
0required values missing, on 0 form(s)
0of 43 forms filed late

Last period with anything received: 2026-07-31.

Reporting

Reports are due about 20 days after each monitoring period ends (read off this permit's own late-day counts in EPA's filings).

Limits in force (91)

OutfallParameterStatisticLimitMonths
001Oxygen, dissolved [DO]MO MIN >= 6 mg/L all year
001pHMINIMUM >= 6 SU all year
001pHMAXIMUM <= 9 SU all year
001Solids, total suspendedDAILY AV <= 15 mg/L all year
001Solids, total suspendedDAILY MX <= 40 mg/L all year
001Solids, total suspendedDAILY AV <= 619 lb/d all year
001Nitrogen, ammonia total [as N]DAILY AV <= 2 mg/L all year
001Nitrogen, ammonia total [as N]DAILY MX <= 10 mg/L all year
001Nitrogen, ammonia total [as N]DAILY AV <= 83 lb/d all year
001Flow, in conduit or thru treatment plantDAILY AV report only all year
001Flow, in conduit or thru treatment plantDAILY MX report only all year
001Flow, in conduit or thru treatment plant2P <= 7826 gal/min all year
001Flow, in conduit or thru treatment plantANNL AVG <= 4.95 MGD all year
001Chlorine, total residualINST MAX < .1 mg/L all year
001Chlorine, total residualMO MIN >= 1 mg/L all year
001E. coliDAILY AV <= 126 CFU/100mL all year
001E. coliDAILY MX <= 399 CFU/100mL all year
001BOD, carbonaceous [5 day, 20 C]DAILY AV <= 7 mg/L all year
001BOD, carbonaceous [5 day, 20 C]DAILY MX <= 17 mg/L all year
001BOD, carbonaceous [5 day, 20 C]DAILY AV <= 289 lb/d all year
002Oxygen, dissolved [DO]MO MIN >= 4 mg/L all year
002pHMINIMUM >= 6 SU all year
002pHMAXIMUM <= 9 SU all year
002Solids, total suspendedDAILY AV <= 15 mg/L all year
002Solids, total suspendedDAILY MX <= 40 mg/L all year
002Solids, total suspendedDAILY AV <= 125 lb/d all year
002Nitrogen, ammonia total [as N]DAILY AV <= 3 mg/L all year
002Nitrogen, ammonia total [as N]DAILY MX <= 10 mg/L all year
002Nitrogen, ammonia total [as N]DAILY AV <= 25 lb/d all year
002Flow, in conduit or thru treatment plantDAILY AV report only all year
002Flow, in conduit or thru treatment plantDAILY MX report only all year
002Flow, in conduit or thru treatment plant2P <= 1860 gal/min all year
002Flow, in conduit or thru treatment plantANNL AVG <= 1 MGD all year
002Chlorine, total residualINST MAX < .1 mg/L all year
002Chlorine, total residualMO MIN >= 1 mg/L all year
002E. coliDAILY AV <= 126 CFU/100mL all year
002E. coliDAILY MX <= 399 CFU/100mL all year
002BOD, carbonaceous [5 day, 20 C]DAILY AV <= 10 mg/L all year
002BOD, carbonaceous [5 day, 20 C]DAILY MX <= 25 mg/L all year
002BOD, carbonaceous [5 day, 20 C]DAILY AV <= 83 lb/d all year
003Nitrogen, ammonia total [as N]DAILY AV <= 28 lb/d all year
003Flow, in conduit or thru treatment plantANNL AVG <= 5.95 MGD all year
003BOD, carbonaceous [5 day, 20 C]DAILY AV <= 187 lb/d all year
TX1Whole effluent toxicity - retest #148HR MIN report only all year
TX1Whole effluent toxicity - retest #148HR MIN report only all year
TX1Whole effluent toxicity - retest #1MO AV MN report only all year
TX1Whole effluent toxicity - retest #1MO AV MN report only all year
TX1Whole effluent toxicity - retest #248HR MIN report only all year
TX1Whole effluent toxicity - retest #248HR MIN report only all year
TX1Whole effluent toxicity - retest #2MO AV MN report only all year
TX1Whole effluent toxicity - retest #2MO AV MN report only all year
TX1IC25 Low Flow Pass/Fail Static Renewal 48Hr Acute Daphnia pulex48HR MIN report only all year
TX1IC25 Low Flow Pass/Fail Static Renewal 48Hr Acute Daphnia pulexMO AV MN report only all year
TX1IC25 Low Flow Pass/Fail Static Renewal 48Hr Acute Pimephales promelas48HR MIN report only all year
TX1IC25 Low Flow Pass/Fail Static Renewal 48Hr Acute Pimephales promelasMO AV MN report only all year
TX1IC25 Lethal Static Renewal 48HR Acute Daphnia pulex48HR MIN report only all year
TX1IC25 Lethal Static Renewal 48HR Acute Daphnia pulexMO AV MN report only all year
TX1IC25 Lethal Static Renewal 48HR Acute Pimephales promelas48HR MIN report only all year
TX1IC25 Lethal Static Renewal 48HR Acute Pimephales promelasMO AV MN report only all year
TX2Whole effluent toxicity - retest #17 DA MIN report only all year
TX2Whole effluent toxicity - retest #17 DA MIN report only all year
TX2Whole effluent toxicity - retest #1MO AV MN report only all year
TX2Whole effluent toxicity - retest #1MO AV MN report only all year
TX2Whole effluent toxicity - retest #27 DA MIN report only all year
TX2Whole effluent toxicity - retest #27 DA MIN report only all year
TX2Whole effluent toxicity - retest #2MO AV MN report only all year
TX2Whole effluent toxicity - retest #2MO AV MN report only all year
TX2IC25 Low Flow Pass/Fail Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia7 DA MIN report only all year
TX2IC25 Low Flow Pass/Fail Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubiaMO AV MN report only all year
TX2IC25 Low Flow Pass/Fail Lethal Static Renewal 7 Day Chronic Pimephales promelas7 DA MIN report only all year
TX2IC25 Low Flow Pass/Fail Lethal Static Renewal 7 Day Chronic Pimephales promelasMO AV MN report only all year
TX2IC25 Low Flow Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia7 DA MIN report only all year
TX2IC25 Low Flow Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubiaMO AV MN report only all year
TX2IC25 Low Flow Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Pimephales promelas7 DA MIN report only all year
TX2IC25 Low Flow Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Pimephales promelasMO AV MN report only all year
TX2IC25 Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia7 DA MIN report only all year
TX2IC25 Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubiaMO AV MN report only all year
TX2IC25 Lethal Static Renewal 7 Day Chronic Pimephales promelas7 DA MIN report only all year
TX2IC25 Lethal Static Renewal 7 Day Chronic Pimephales promelasMO AV MN report only all year
TX2IC25 Sub-Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia7 DA MIN report only all year
TX2IC25 Sub-Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubiaMO AV MN report only all year
TX2IC25 Sub-Lethal Static Renewal 7 Day Chronic Pimephales promelas7 DA MIN report only all year
TX2IC25 Sub-Lethal Static Renewal 7 Day Chronic Pimephales promelasMO AV MN report only all year
TXAWhole effluent toxicity - retest #1SINGSAMP report only all year
TXAWhole effluent toxicity - retest #2SINGSAMP report only all year
TXALC50 Pass/Fail Static 24Hr Acute D. PulexSINGSAMP report only all year
TXALC50 Pass/Fail Static 24Hr Acute Pimephales promelasSINGSAMP report only all year
TXBWhole effluent toxicity - retest #1SINGSAMP report only all year
TXBWhole effluent toxicity - retest #2SINGSAMP report only all year
TXBLC50 Pass/Fail Static 24Hr Acute D. PulexSINGSAMP report only all year
TXBLC50 Pass/Fail Static 24Hr Acute Pimephales promelasSINGSAMP report only 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