HOUSTON, CITY OF

NPDES permit TX0096172 · Major POTW · administratively continued, expires 2002-09-01 · 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 2002-09-01 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

11values over a limit
0required values missing, on 0 form(s)
3of 43 forms filed late

Last period with anything received: 2026-07-31. Most often over: Nitrogen, ammonia total [as N] (7), BOD, carbonaceous [5 day, 20 C] (2), Solids, total suspended (2).

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 (75)

OutfallParameterStatisticLimitMonths
001Oxygen, dissolved [DO]MO MIN >= 4 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 <= 25020 lb/d all year
001Nitrogen, ammonia total [as N]DAILY AV <= 3 mg/L Apr, May, Jun, Jul, Aug, Sep, Oct
001Nitrogen, ammonia total [as N]DAILY AV <= 5 mg/L Jan, Feb, Mar, Nov, Dec
001Nitrogen, ammonia total [as N]DAILY MX <= 10 mg/L Apr, May, Jun, Jul, Aug, Sep, Oct
001Nitrogen, ammonia total [as N]DAILY MX <= 10 mg/L Jan, Feb, Mar, Nov, Dec
001Nitrogen, ammonia total [as N]DAILY AV <= 5004 lb/d Apr, May, Jun, Jul, Aug, Sep, Oct
001Nitrogen, ammonia total [as N]DAILY AV <= 8340 lb/d Jan, Feb, Mar, Nov, Dec
001Copper, total [as Cu]DAILY AV <= .0055 mg/L all year
001Copper, total [as Cu]DAILY MX <= .0116 mg/L all year
001Copper, total [as Cu]DAILY AV <= 9.2 lb/d all year
001Nickel, total [as Ni]DAILY AV report only all year
001Nickel, total [as Ni]DAILY MX report only all year
001Nickel, total [as Ni]DAILY AV report only 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 <= 277777 gal/min all year
001Flow, in conduit or thru treatment plantANNL AVG <= 200 MGD all year
001Chlorine, total residualINST MAX <= .099 mg/L all year
001Chlorine, total residualMO MIN >= 1 mg/L all year
001BOD, carbonaceous [5 day, 20 C]DAILY AV <= 10 mg/L all year
001BOD, carbonaceous [5 day, 20 C]DAILY MX <= 25 mg/L all year
001BOD, carbonaceous [5 day, 20 C]DAILY AV <= 16680 lb/d all year
002Oxygen, dissolved [DO]MO MIN report only all year
002pHMINIMUM >= 6 SU all year
002pHMAXIMUM <= 9 SU all year
002Solids, total suspendedDAILY AV report only all year
002Solids, total suspendedDAILY MX report only all year
002Solids, total suspendedDAILY AV report only all year
002Nitrogen, ammonia total [as N]DAILY AV report only all year
002Nitrogen, ammonia total [as N]DAILY MX report only all year
002Nitrogen, ammonia total [as N]DAILY AV report only 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
002Chlorine, total residualMO MAX report only all year
002Coliform, fecal generalMO GEOMN report only all year
002Coliform, fecal generalDAILY MX report only all year
002BOD, carbonaceous [5 day, 20 C]DAILY AV report only all year
002BOD, carbonaceous [5 day, 20 C]DAILY MX report only all year
002BOD, carbonaceous [5 day, 20 C]DAILY AV report only all year
003Solids, total suspendedDAILY AV <= 15 mg/L all year
003Solids, total suspendedDAILY MX <= 40 mg/L all year
003Solids, total suspendedDAILY AV <= 25020 lb/d all year
003Nitrogen, ammonia total [as N]DAILY AV <= 3 mg/L Apr, May, Jun, Jul, Aug, Sep, Oct
003Nitrogen, ammonia total [as N]DAILY AV <= 5 mg/L Jan, Feb, Mar, Nov, Dec
003Nitrogen, ammonia total [as N]DAILY MX <= 10 mg/L Apr, May, Jun, Jul, Aug, Sep, Oct
003Nitrogen, ammonia total [as N]DAILY MX <= 10 mg/L Jan, Feb, Mar, Nov, Dec
003Nitrogen, ammonia total [as N]DAILY AV <= 5004 lb/d Apr, May, Jun, Jul, Aug, Sep, Oct
003Nitrogen, ammonia total [as N]DAILY AV <= 8340 lb/d Jan, Feb, Mar, Nov, Dec
003Flow, in conduit or thru treatment plantDAILY AV report only all year
003Flow, in conduit or thru treatment plantDAILY MX report only all year
003Flow, in conduit or thru treatment plantANNL AVG <= 200 MGD all year
003BOD, carbonaceous [5 day, 20 C]DAILY AV <= 10 mg/L all year
003BOD, carbonaceous [5 day, 20 C]DAILY MX <= 25 mg/L all year
003BOD, carbonaceous [5 day, 20 C]DAILY AV <= 16680 lb/d all year
TX1Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Americamysis bahia (Mysidopsis bahia)7 DA MIN report only all year
TX1Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Americamysis bahia (Mysidopsis bahia)MO AV MN report only all year
TX1Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Menidia menidia7 DA MIN report only all year
TX1Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Menidia menidiaMO AV MN report only all year
TX1NOEC Lethal Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia)7 DA MIN report only all year
TX1NOEC Lethal Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia)MO AV MN report only all year
TX1NOEC Lethal Static Renewal 7 Day Chronic Menidia menidia7 DA MIN report only all year
TX1NOEC Lethal Static Renewal 7 Day Chronic Menidia menidiaMO AV MN report only all year
TX1NOEC Sub-Lethal Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia)7 DA MIN report only all year
TX1NOEC Sub-Lethal Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia)MO AV MN report only all year
TX1NOEC Sub-Lethal Static Renewal 7 Day Chronic Menidia menidia7 DA MIN report only all year
TX1NOEC Sub-Lethal Static Renewal 7 Day Chronic Menidia menidiaMO AV MN report only all year
TXALC50 Pass/Fail Static 24Hr Acute Americamysis bahia (formerly Mysidopsis bahia)SINGSAMP report only all year
TXALC50 Pass/Fail Static 24Hr Acute Menidia menidiaSINGSAMP report only all year
TXBLC50 Pass/Fail Static 24Hr Acute Americamysis bahia (formerly Mysidopsis bahia)SINGSAMP report only all year
TXBLC50 Pass/Fail Static 24Hr Acute Menidia menidiaSINGSAMP 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