CENTER, CITY OF

NPDES permit TX0076953 · Major POTW · effective, expires 2027-04-04 · 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.

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

5values over a limit
0required values missing, on 0 form(s)
0of 39 forms filed late

Last period with anything received: 2026-07-31. Most often over: Mercury, total [as Hg] (3), Flow, in conduit or thru treatment plant (2).

Reporting

Reports are due about 20 days after each monitoring period ends (the most common figure among TX permits in EPA's filings — check your permit).

Limits in force (99)

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 <= 20 mg/L all year
001Solids, total suspendedDAILY MX <= 45 mg/L all year
001Solids, total suspendedDAILY AV <= 295 lb/d all year
001Nitrogen, ammonia total [as N]DAILY AV <= 3 mg/L all year
001Nitrogen, ammonia total [as N]DAILY MX <= 10 mg/L all year
001Nitrogen, ammonia total [as N]DAILY AV <= 44 lb/d all year
001Copper, total [as Cu]DAILY AV <= .0078 mg/L all year
001Copper, total [as Cu]DAILY MX <= .0165 mg/L all year
001Copper, total [as Cu]DAILY AV <= .12 lb/d all year
001Zinc, total [as Zn]DAILY AV <= .0812 mg/L all year
001Zinc, total [as Zn]DAILY MX <= .171 mg/L all year
001Zinc, total [as Zn]DAILY AV <= 1.2 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 <= 3056 gal/min all year
001Flow, in conduit or thru treatment plantANNL AVG <= 1.77 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
001Mercury, total [as Hg]DAILY AV <= .0000279 mg/L all year
001Mercury, total [as Hg]DAILY MX <= .000056 mg/L all year
001Mercury, total [as Hg]DAILY AV <= .0004 lb/d all year
001BOD, carbonaceous [5 day, 20 C]DAILY AV <= 20 mg/L all year
001BOD, carbonaceous [5 day, 20 C]DAILY MX <= 45 mg/L all year
001BOD, carbonaceous [5 day, 20 C]DAILY AV <= 295 lb/d all year
002Oxygen, dissolved [DO]MO MIN >= 6 mg/L all year
002pHMINIMUM >= 6 SU all year
002pHMAXIMUM <= 9 SU all year
002Solids, total suspendedDAILY AV <= 12 mg/L all year
002Solids, total suspendedDAILY MX <= 40 mg/L all year
002Solids, total suspendedDAILY AV <= 177 lb/d all year
002Nitrogen, ammonia total [as N]DAILY AV <= 2 mg/L all year
002Nitrogen, ammonia total [as N]DAILY MX <= 10 mg/L all year
002Nitrogen, ammonia total [as N]DAILY AV <= 30 lb/d all year
002Copper, total [as Cu]DAILY AV <= .0078 mg/L all year
002Copper, total [as Cu]DAILY MX <= .0165 mg/L all year
002Copper, total [as Cu]DAILY AV <= .12 lb/d all year
002Zinc, total [as Zn]DAILY AV <= .0812 mg/L all year
002Zinc, total [as Zn]DAILY MX <= .171 mg/L all year
002Zinc, total [as Zn]DAILY AV <= 1.2 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 <= 3056 gal/min all year
002Flow, in conduit or thru treatment plantANNL AVG <= 1.77 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
002Mercury, total [as Hg]DAILY AV <= .0000279 mg/L all year
002Mercury, total [as Hg]DAILY MX <= .000056 mg/L all year
002Mercury, total [as Hg]DAILY AV <= .0004 lb/d all year
002BOD, carbonaceous [5 day, 20 C]DAILY AV <= 5 mg/L all year
002BOD, carbonaceous [5 day, 20 C]DAILY MX <= 20 mg/L all year
002BOD, carbonaceous [5 day, 20 C]DAILY AV <= 74 lb/d all year
003Solids, total suspendedDAILY AV <= 295 lb/d all year
003Nitrogen, ammonia total [as N]DAILY AV <= 44 lb/d all year
003Copper, total [as Cu]DAILY AV <= .17 lb/d all year
003Zinc, total [as Zn]DAILY AV <= 1.3 lb/d all year
003Flow, in conduit or thru treatment plantANNL AVG <= 1.77 MGD all year
003Mercury, total [as Hg]DAILY AV <= .0004 lb/d all year
003BOD, carbonaceous [5 day, 20 C]DAILY AV <= 295 lb/d all year
TX1Whole effluent toxicity7 DA MIN >= 67 % all year
TX1Whole effluent toxicityMO AV MN >= 67 % all year
TX1Whole effluent toxicity - retest #17 DA MIN report only all year
TX1Whole effluent toxicity - retest #1MO AV MN report only all year
TX1Whole effluent toxicity - retest #27 DA MIN report only all year
TX1Whole effluent toxicity - retest #2MO AV MN report only all year
TX1Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Ceriodaphnia dubia7 DA MIN report only all year
TX1Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Ceriodaphnia dubiaMO AV MN report only all year
TX1Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Pimephales promelas7 DA MIN report only all year
TX1Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Pimephales promelasMO AV MN report only all year
TX1NOEC Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia7 DA MIN report only all year
TX1NOEC Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubiaMO AV MN report only all year
TX1NOEC Lethal Static Renewal 7 Day Chronic Pimephales promelas7 DA MIN report only all year
TX1NOEC Lethal Static Renewal 7 Day Chronic Pimephales promelasMO AV MN report only all year
TX1NOEC Sub-Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia7 DA AVG report only all year
TX1NOEC Sub-Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubiaMO AV MN report only all year
TX1NOEC Sub-Lethal Static Renewal 7 Day Chronic Pimephales promelas7 DA MIN report only all year
TX1NOEC Sub-Lethal Static Renewal 7 Day Chronic Pimephales promelasMO AV MN report only all year
TX1Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia7 DA MIN report only all year
TX1Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubiaMO AV MN report only all year
TX1Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Pinephales promelas7 DA MIN report only all year
TX1Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Pinephales promelasMO AV MN report only all year
TX1LOEC Lethal Survival Static Renewal 7 Day Chronic Ceriodaphnia dubia7 DA MIN report only all year
TX1LOEC Lethal Survival Static Renewal 7 Day Chronic Ceriodaphnia dubiaMO AV MN report only all year
TX1LOEC Lethal Survival Static Renewal 7 Day Chronic Pimephales promelas7 DA MIN report only all year
TX1LOEC Lethal Survival Static Renewal 7 Day Chronic Pimephales promelasMO AV MN report only all year
TX1LOEC Sub-Lethal Reproduction Static Renewal 7 Day Chronic Ceriodaphnia dubia7 DA MIN report only all year
TX1LOEC Sub-Lethal Reproduction Static Renewal 7 Day Chronic Ceriodaphnia dubiaMO AV MN report only all year
TX1LOEC Sub-Lethal Reproduction Static Renewal 7 Day Chronic Pimephales promelas7 DA MIN report only all year
TX1LOEC Sub-Lethal Reproduction 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

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