Clean Water Act discharge permit · NPDES TX0094307
HARRIS COUNTY MUD 167 WWTP, Katy, TX: NPDES TX0094307 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MajorDischarger class
- 24Pollutants under a numeric limit
- 7Pollutants with an effluent exceedance
- 1Inspections on file
- 0Formal enforcement actions
HARRIS COUNTY MUD 167 WWTP, held by HARRIS COUNTY MUD 167, holds NPDES permit TX0094307, which discharges to Buffalo Bayou Above Tidal. EPA’s file records it issued October 6, 2022 and expiring October 6, 2025.
HARRIS COUNTY MUD 167 WWTP, Katy, Texas: Individual permit TX0094307, held by HARRIS COUNTY MUD 167; Publicly owned treatment works; Administratively continued (past its expiration date and still in force until reissued); issued October 6, 2022, term to October 6, 2025; discharges to Buffalo Bayou Above Tidal.
- Flow, in conduit or thru treatment plant: 4 limits, 84 violations of any kind, 22 effluent exceedances, latest March 31, 2018, largest 99,999% over the limit.
- Nitrogen, ammonia total [as N]: 3 limits, 98 violations of any kind, 20 effluent exceedances, latest February 28, 2015, largest 189% over the limit.
- BOD, carbonaceous [5 day, 20 C]: 3 limits, 85 violations of any kind, 7 effluent exceedances, latest February 29, 2024, largest 20% over the limit.
- Solids, total suspended: 3 limits, 87 violations of any kind, 6 effluent exceedances, latest January 31, 2009, largest 52% over the limit.
- E. coli: 2 limits, 29 violations of any kind, 4 effluent exceedances, latest April 30, 2026, largest 2,320% over the limit.
- Oxygen, dissolved [DO]: 1 limit, 26 violations of any kind, 2 effluent exceedances, latest October 31, 2017, largest 33% over the limit.
- Chlorine, total residual: 2 limits, 57 violations of any kind, 1 effluent exceedance, latest March 31, 2010, largest 70% over the limit.
- pH: 2 limits, 51 violations of any kind, 0 effluent exceedances.
- Arsenic, dry weight: 0 limits, 18 violations of any kind, 0 effluent exceedances.
- Chromium, sludge, total, dry weight [as Cr]: 0 limits, 18 violations of any kind, 0 effluent exceedances.
- Nickel, sludge, total, dry weight [as Ni]: 0 limits, 12 violations of any kind, 0 effluent exceedances.
- Mercury, sludge, total, dry weight [as Hg]: 0 limits, 12 violations of any kind, 0 effluent exceedances.
- Selenium, dry weight: 0 limits, 9 violations of any kind, 0 effluent exceedances.
- Copper, dry weight: 0 limits, 9 violations of any kind, 0 effluent exceedances.
- Cadmium, dry weight: 0 limits, 9 violations of any kind, 0 effluent exceedances.
- Molybdenum, sludge, total, dry weight [as Mo]: 0 limits, 9 violations of any kind, 0 effluent exceedances.
- Zinc, sludge, total, dry weight [as Zn]: 0 limits, 9 violations of any kind, 0 effluent exceedances.
- Lead, sludge, total, dry weight [as Pb]: 0 limits, 9 violations of any kind, 0 effluent exceedances.
- Vector attraction reduction alternative used: 0 limits, 9 violations of any kind, 0 effluent exceedances.
- Description of pathogen option used: 0 limits, 8 violations of any kind, 0 effluent exceedances.
- Level of pathogen requirements achieved: 0 limits, 7 violations of any kind, 0 effluent exceedances.
- Nickel, total [as Ni]: 0 limits, 6 violations of any kind, 0 effluent exceedances.
- Annual amt of sludge incinerated: 0 limits, 4 violations of any kind, 0 effluent exceedances.
- Pollutant table from 503.13: 0 limits, 4 violations of any kind, 0 effluent exceedances.
- Fecal coliform: 0 limits, 3 violations of any kind, 0 effluent exceedances.
- Polychlorinated biphenyls [PCBs]: 0 limits, 3 violations of any kind, 0 effluent exceedances.
- Toxicity characteristic leaching procedure: 0 limits, 3 violations of any kind, 0 effluent exceedances.
- Ann. amt sludge disposed by other method: 0 limits, 3 violations of any kind, 0 effluent exceedances.
- Annual sludge production, total: 0 limits, 3 violations of any kind, 0 effluent exceedances.
- Annual amount of sludge land applied: 0 limits, 3 violations of any kind, 0 effluent exceedances.
- Annual amt. sludge disposed surface unit: 0 limits, 3 violations of any kind, 0 effluent exceedances.
- Annual amt sludge disposed in landfill: 0 limits, 3 violations of any kind, 0 effluent exceedances.
- Annual amt sludge transported interstate: 0 limits, 3 violations of any kind, 0 effluent exceedances.
- Unit w/liner/leachate collection system: 0 limits, 3 violations of any kind, 0 effluent exceedances.
- Compliance w/part 258 sludge requirement: 0 limits, 3 violations of any kind, 0 effluent exceedances.
- Boundary areas: 0 limits, 3 violations of any kind, 0 effluent exceedances.
- Salmonella: 0 limits, 3 violations of any kind, 0 effluent exceedances.
- Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Ceriodaphnia dubia: 2 limits, 2 violations of any kind, 0 effluent exceedances.
- Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Pimephales promelas: 2 limits, 2 violations of any kind, 0 effluent exceedances.
- NOEC Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia: 2 limits, 2 violations of any kind, 0 effluent exceedances.
- NOEC Lethal Static Renewal 7 Day Chronic Pimephales promelas: 2 limits, 2 violations of any kind, 0 effluent exceedances.
- NOEC Sub-Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia: 2 limits, 2 violations of any kind, 0 effluent exceedances.
- NOEC Sub-Lethal Static Renewal 7 Day Chronic Pimephales promelas: 2 limits, 2 violations of any kind, 0 effluent exceedances.
- Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia: 2 limits, 2 violations of any kind, 0 effluent exceedances.
- Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Pinephales promelas: 2 limits, 2 violations of any kind, 0 effluent exceedances.
- LOEC Lethal Survival Static Renewal 7 Day Chronic Ceriodaphnia dubia: 2 limits, 2 violations of any kind, 0 effluent exceedances.
- LOEC Lethal Survival Static Renewal 7 Day Chronic Pimephales promelas: 2 limits, 2 violations of any kind, 0 effluent exceedances.
- LOEC Sub-Lethal Reproduction Static Renewal 7 Day Chronic Ceriodaphnia dubia: 2 limits, 2 violations of any kind, 0 effluent exceedances.
- LOEC Sub-Lethal Reproduction Static Renewal 7 Day Chronic Pimephales promelas: 2 limits, 2 violations of any kind, 0 effluent exceedances.
- Annual whole sludge application rate: 0 limits, 1 violation of any kind, 0 effluent exceedances.
- Whole effluent toxicity - retest #1: 3 limits, 0 violations of any kind, 0 effluent exceedances.
- Whole effluent toxicity - retest #2: 3 limits, 0 violations of any kind, 0 effluent exceedances.
- LC50 Pass/Fail Static 24Hr Acute D. Pulex: 1 limit, 0 violations of any kind, 0 effluent exceedances.
- LC50 Pass/Fail Static 24Hr Acute Pimephales promelas: 1 limit, 0 violations of any kind, 0 effluent exceedances.
- March 27, 2026: Permit Violations - Violation Specified in Comment (ST6).
- March 27, 2026: Evaluation (S).
- February 28, 2024: Permit Violations - Violation Specified in Comment (ST6).
- December 8, 2021: Permit Violations - Violation Specified in Comment (ST6).
Texas holds 1,720 Publicly owned treatment works coverages of this permit type in EPA’s file; 1,610 were issued before TX0094307.
Coverages issued nearest TX0094307
- August 2, 2022: STONEBROOKE SECTIONS 1 AND 2, Conroe, TX0142000, held by MONTGOMERY COUNTY MUD 212
- August 15, 2022: CITY OF ALVORD WWTP, Alvord, TX0142204, held by ALVORD, CITY OF
- September 1, 2022: JACKRABBIT ROAD PUD WWTP, Houston, TX0046621, held by JACKRABBIT ROAD PUBLIC UTILITY DISTRICT
- September 8, 2022: GREEN RIDGE WWTP, Houston, TX0026433, held by HOUSTON, CITY OF
- September 9, 2022: HARRIS COUNTY MUD 558 WWTF, Tomball, TX0141577, held by HARRIS COUNTY MUD 558
- October 11, 2022: CITY OF PENELOPE WWTP, Penelope, TX0142247, held by PENELOPE, CITY OF
- October 13, 2022: LEGACY HILLS WRF, Celina, TX0142018, held by CELINA, CITY OF
- October 19, 2022: CITY OF SAN ANGELO WWTF, San Angelo, TX0141534, held by SAN ANGELO, CITY OF
- October 20, 2022: GUNTER CREEK WWTP, Gunter, TX0142280, held by MUSTANG SPECIAL UTILITY DISTRICT
- October 24, 2022: CITY OF GRANBURY EAST WWTP, Granbury, TX0139556, held by GRANBURY, CITY OF
HARRIS COUNTY MUD 167 WWTP among its neighbors
EPA’s permit file holds 67 discharge permits in the Bear Creek subwatershed (HUC 120401040202), TX0094307 among them. Its county holds 4,455, 195 of them major permits; TX0094307 is a major permit.
Other permits in the Bear Creek subwatershed (HUC 120401040202)
- 10 055SF SHELL, Katy: TXR1598RM, minor permit, discharging to SOUTH MAYDE CREEK, permit term to March 4, 2028
- 18415 FOREST DEER RAOD, Houston: TX0097373, minor permit, discharging to BEAR CREEK;S MAYDE CREEK;BUFFALO BAYOU ABOVE TIDAL, permit term to July 3, 2023
- ACC HOU - LONGENBAUGH, Katy: TXR05GQ73, minor permit, permit term to August 13, 2026
- ASM - LONGENBAUGH, Katy: TXR05GQ74, minor permit, permit term to August 13, 2026
- ASPIRE KATY, Katy: TXR1582TT, minor permit, permit term to March 4, 2028
- BARKER READY MIX, Houston: TXG111207, minor permit, discharging to BEAR CREEK, permit term to November 7, 2021
- BEAR CREEK VILLAGE SUBDIVISION DRAINAGE IMPROVEMENTS, Houston: TXR1517MZ, minor permit, discharging to LANGHAM CREEK, permit term to March 4, 2028
- BEAR CREEK VILLAGE SUBDIVISION DRAINAGE IMPROVEMENTS STAGE A, Houston: TXR1581NA, minor permit, discharging to LANGHAM CREEK, permit term to March 4, 2028
- COSTCO WAREHOUSE CW 23-0448, Katy: TXR1537XS, minor permit, discharging to LANGHAM CREEK, permit term to March 4, 2028
- CYPRESS LAKES HIGH SCHOOL, Katy: TXR1512UM, minor permit, discharging to SOUTH MAYDE CREEK, permit term to March 4, 2028
Identity
| Facility as filed | HARRIS COUNTY MUD 167 WWTP |
|---|---|
| Permittee as filed | HARRIS COUNTY MUD 167 |
| NPDES ID | TX0094307 |
| Permit status | Administratively continued (past its expiration date and still in force until reissued) |
| Permit type | Individual permit |
| Discharger class | Major discharger |
| Facility type | Publicly owned treatment works |
| Program | Publicly owned treatment works |
| Issued | October 6, 2022 |
| Expiration date | October 6, 2025 |
| Address | Katy, TX 77084 |
| Receiving water | Buffalo Bayou Above Tidal |
| Subwatershed | Bear Creek (HUC 120401040202) |
| SIC | 4952 – Sewerage Systems |
Effluent limits and exceedances
- 54Pollutants on file
- 24Under a numeric limit
- 50With a violation of any kind
- 7With an effluent exceedance
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 measure | Limits | Violations, any kind | Effluent exceedances | Latest exceedance | Largest exceedance, as filed |
|---|---|---|---|---|---|
| Flow, in conduit or thru treatment plant | 4 | 84 | 22 | March 31, 2018 | 99,999% over the limit |
| Nitrogen, ammonia total [as N] | 3 | 98 | 20 | February 28, 2015 | 189% over the limit |
| BOD, carbonaceous [5 day, 20 C] | 3 | 85 | 7 | February 29, 2024 | 20% over the limit |
| Solids, total suspended | 3 | 87 | 6 | January 31, 2009 | 52% over the limit |
| E. coli | 2 | 29 | 4 | April 30, 2026 | 2,320% over the limit |
| Oxygen, dissolved [DO] | 1 | 26 | 2 | October 31, 2017 | 33% over the limit |
| Chlorine, total residual | 2 | 57 | 1 | March 31, 2010 | 70% over the limit |
| pH | 2 | 51 | 0 | ||
| Arsenic, dry weight | 0 | 18 | 0 | ||
| Chromium, sludge, total, dry weight [as Cr] | 0 | 18 | 0 | ||
| Nickel, sludge, total, dry weight [as Ni] | 0 | 12 | 0 | ||
| Mercury, sludge, total, dry weight [as Hg] | 0 | 12 | 0 | ||
| Selenium, dry weight | 0 | 9 | 0 | ||
| Copper, dry weight | 0 | 9 | 0 | ||
| Cadmium, dry weight | 0 | 9 | 0 | ||
| Molybdenum, sludge, total, dry weight [as Mo] | 0 | 9 | 0 | ||
| Zinc, sludge, total, dry weight [as Zn] | 0 | 9 | 0 | ||
| Lead, sludge, total, dry weight [as Pb] | 0 | 9 | 0 | ||
| Vector attraction reduction alternative used | 0 | 9 | 0 | ||
| Description of pathogen option used | 0 | 8 | 0 | ||
| Level of pathogen requirements achieved | 0 | 7 | 0 | ||
| Nickel, total [as Ni] | 0 | 6 | 0 | ||
| Annual amt of sludge incinerated | 0 | 4 | 0 | ||
| Pollutant table from 503.13 | 0 | 4 | 0 | ||
| Fecal coliform | 0 | 3 | 0 | ||
| Polychlorinated biphenyls [PCBs] | 0 | 3 | 0 | ||
| Toxicity characteristic leaching procedure | 0 | 3 | 0 | ||
| Ann. amt sludge disposed by other method | 0 | 3 | 0 | ||
| Annual sludge production, total | 0 | 3 | 0 | ||
| Annual amount of sludge land applied | 0 | 3 | 0 | ||
| Annual amt. sludge disposed surface unit | 0 | 3 | 0 | ||
| Annual amt sludge disposed in landfill | 0 | 3 | 0 | ||
| Annual amt sludge transported interstate | 0 | 3 | 0 | ||
| Unit w/liner/leachate collection system | 0 | 3 | 0 | ||
| Compliance w/part 258 sludge requirement | 0 | 3 | 0 | ||
| Boundary areas | 0 | 3 | 0 | ||
| Salmonella | 0 | 3 | 0 | ||
| Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Ceriodaphnia dubia | 2 | 2 | 0 | ||
| Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Pimephales promelas | 2 | 2 | 0 | ||
| NOEC Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia | 2 | 2 | 0 | ||
| NOEC Lethal Static Renewal 7 Day Chronic Pimephales promelas | 2 | 2 | 0 | ||
| NOEC Sub-Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia | 2 | 2 | 0 | ||
| NOEC Sub-Lethal Static Renewal 7 Day Chronic Pimephales promelas | 2 | 2 | 0 | ||
| Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia | 2 | 2 | 0 | ||
| Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Pinephales promelas | 2 | 2 | 0 | ||
| LOEC Lethal Survival Static Renewal 7 Day Chronic Ceriodaphnia dubia | 2 | 2 | 0 | ||
| LOEC Lethal Survival Static Renewal 7 Day Chronic Pimephales promelas | 2 | 2 | 0 | ||
| LOEC Sub-Lethal Reproduction Static Renewal 7 Day Chronic Ceriodaphnia dubia | 2 | 2 | 0 | ||
| LOEC Sub-Lethal Reproduction Static Renewal 7 Day Chronic Pimephales promelas | 2 | 2 | 0 | ||
| Annual whole sludge application rate | 0 | 1 | 0 | ||
| Whole effluent toxicity - retest #1 | 3 | 0 | 0 | ||
| Whole effluent toxicity - retest #2 | 3 | 0 | 0 | ||
| LC50 Pass/Fail Static 24Hr Acute D. Pulex | 1 | 0 | 0 | ||
| LC50 Pass/Fail Static 24Hr Acute Pimephales promelas | 1 | 0 | 0 |
Inspections, violations and enforcement
- 3Single-event violations
| Date | What EPA recorded | Agency |
|---|---|---|
| March 27, 2026 | Permit Violations - Violation Specified in Comment | ST6 |
| February 28, 2024 | Permit Violations - Violation Specified in Comment | ST6 |
| December 8, 2021 | Permit Violations - Violation Specified in Comment | ST6 |
Inspections
| Date | What EPA recorded | Agency |
|---|---|---|
| March 27, 2026 | Evaluation | S |
Formal enforcement and penalties
0 formal actions, 0 of them with a penalty assessed. Federal and state penalties are separate figures from separate authorities and are shown as each was filed, never added together.
Informal enforcement
EPA’s informal enforcement file holds no action for NPDES TX0094307.
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Figures from EPA’s ICIS-NPDES download, loaded October 14, 2026.