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Clean Water Act discharge permit · NPDES TX0063053

FWSD 23 WWTP, Houston, TX: NPDES TX0063053 discharge permit, effluent exceedances, inspections, penalties

FWSD 23 WWTP, held by HOUSTON, CITY OF, holds NPDES permit TX0063053, which discharges to Halls Bayou;Hsc Tidal. EPA’s file records it issued November 21, 2019 and expiring November 21, 2024. The status and dates are as EPA’s permit file stood when Velarion loaded it (October 14, 2026); EPA’s free Detailed Facility Report on ECHO carries the permit’s current standing.

Identity

Facility as filedFWSD 23 WWTP
Permittee as filedHOUSTON, CITY OF
NPDES IDTX0063053
Permit statusAdministratively continued (past its expiration date and still in force until reissued)
Permit typeIndividual permit
Discharger classMajor discharger
Facility typePublicly owned treatment works
ProgramPublicly owned treatment works
IssuedNovember 21, 2019
Expiration dateNovember 21, 2024
AddressHouston, TX 77028
Receiving waterHALLS BAYOU;HSC TIDAL
Program components on filePOTW, Pretreatment
SIC4952 – Sewerage Systems

Cited to the EPA ICIS-NPDES permit file (ECHO download) and EPA’s NAICS/SIC and component files, the same download.

Effluent limits and exceedances

An effluent exceedance is a discharge monitoring report value over the permit’s numeric limit (EPA’s violation code E90). A violation of any kind also counts a report not filed. Each row is EPA’s own count for that pollutant.

Pollutant or measureLimitsViolations, any kindEffluent exceedancesLatest exceedanceLargest exceedance, as filed
Solids, total suspended313076May 31, 2023455% over the limit
Nitrogen, ammonia total [as N]68935July 31, 2024306% over the limit
Flow, in conduit or thru treatment plant47632September 30, 201959% over the limit
BOD, carbonaceous [5 day, 20 C]3659August 31, 202399,999% over the limit
E. coli644March 31, 2026105% over the limit
pH3211September 30, 2002
Chlorine, total residual2151May 31, 200620% over the limit
Oxygen, dissolved [DO]1100
Coliform, fecal general0100
LC50 Pass/Fail Static 24Hr Acute D. Pulex140
LC50 Pass/Fail Static 24Hr Acute Pimephales promelas140
Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Ceriodaphnia dubia020
Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Pimephales promelas020
NOEC Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia020
NOEC Lethal Static Renewal 7 Day Chronic Pimephales promelas020
NOEC Sub-Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia020
NOEC Sub-Lethal Static Renewal 7 Day Chronic Pimephales promelas020
Arsenic, dry weight500
Whole effluent toxicity - retest #1500
Whole effluent toxicity - retest #2500
Chromium, sludge, total, dry weight [as Cr]500
IC25 Low Flow Pass/Fail Lethal Static Renewal 7 Day Chronic Pimephales promelas400
IC25 Low Flow Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Pimephales promelas400
IC25 Lethal Static Renewal 7 Day Chronic Pimephales promelas400
IC25 Sub-Lethal Static Renewal 7 Day Chronic Pimephales promelas400
Selenium, dry weight300
Copper, dry weight300
Cadmium, dry weight300
Molybdenum, sludge, total, dry weight [as Mo]300
Zinc, sludge, total, dry weight [as Zn]300
Lead, sludge, total, dry weight [as Pb]300
Nickel, sludge, total, dry weight [as Ni]300
Mercury, sludge, total, dry weight [as Hg]300
Nickel, total [as Ni]200
Whole Effluent Toxicity [WET] - C. dubia200
Level of pathogen requirements achieved200
Description of pathogen option used200
Vector attraction reduction alternative used200
IC25 Low Flow Pass/Fail Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia200
IC25 Low Flow Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia200
IC25 Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia200
IC25 Sub-Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia200
Fecal coliform100
Polychlorinated biphenyls [PCBs]100
Toxicity characteristic leaching procedure100
Annual whole sludge application rate100
Ann. amt sludge disposed by other method100
Annual amt of sludge incinerated100
Annual sludge production, total100
Annual amount of sludge land applied100
Annual amt. sludge disposed surface unit100
Annual amt sludge disposed in landfill100
Annual amt sludge transported interstate100
Unit w/liner/leachate collection system100
Compliance w/part 258 sludge requirement100
Boundary areas100
Salmonella100
Pollutant table from 503.13100

Cited to the EPA ICIS-NPDES limits and effluent violations files (ECHO download); up to 60 rows shown, most exceedances first.

Inspections, violations and enforcement

DateWhat EPA recordedAgency
October 26, 2023Dry-weather SSO discharge to waters of the U.S., not permit compliant, no endangermentEP6
October 13, 2023Dry-weather SSO, no discharge to waters of the U.S., not permit compliant, no endangermentEP6
June 6, 2023Permit Violations - Violation Specified in CommentST6
October 5, 2022Dry-weather SSO discharge to waters of the U.S., not permit compliant, no endangermentEP6
October 5, 2022Dry-weather SSO, no discharge to waters of the U.S., not permit compliant, no endangermentEP6
January 4, 2022Dry-weather SSO, no discharge to waters of the U.S., not permit compliant, no endangermentEP6
January 1, 2022Dry-weather SSO discharge to waters of the U.S., not permit compliant, no endangermentEP6
November 30, 2021Dry-weather SSO discharge to waters of the U.S., not permit compliant, no endangermentEP6
October 3, 2021Dry-weather SSO, no discharge to waters of the U.S., not permit compliant, no endangermentEP6
May 7, 2021Dry-weather SSO, no discharge to waters of the U.S., not permit compliant, no endangermentEP6
December 2, 2020Wet-weather SSO, no discharge to waters of the U.S., not permit compliant, no endangermentEP6
October 20, 2020Dry-weather SSO discharge to waters of the U.S., not permit compliant, no endangermentEP6
October 2, 2020Dry-weather SSO, no discharge to waters of the U.S., not permit compliant, no endangermentEP6
January 10, 2020Dry-weather SSO discharge to waters of the U.S., not permit compliant, no endangermentEP6
October 30, 2019Dry-weather SSO, no discharge to waters of the U.S., that may endanger health or the environmentEP6
September 24, 2019WW SSO - Overflow to Dry Land or Building BackupEP6
September 20, 2019WW SSO - Discharge to WatersEP6
May 27, 2018WW SSO - Discharge to WatersEP6

Velarion’s copy of EPA’s ICIS-NPDES files does not include the inspections, formal enforcement actions and informal enforcement actions files, so this page shows none of them. EPA’s free Detailed Facility Report on ECHO lists this permit’s inspections, enforcement actions and penalties.

Cited to the EPA ICIS-NPDES violation, inspection and enforcement files (ECHO download); up to 50 rows of each shown, newest first.

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Nearby on the register

Figures from EPA’s ICIS-NPDES download, loaded October 14, 2026.

What this page shows

This public-records page covers NPDES permit TX0063053 for the FWSD 23 WWTP in Houston, TX, held by HOUSTON, CITY OF, which discharges to HALLS BAYOU;HSC TIDAL. The permit is administratively continued as a Major discharger, with 51 pollutants under a numeric limit and 7 pollutants with an effluent exceedance.