Clean Water Act discharge permit · NPDES TX0127311
HARRIS COUNTY MUD 434 WWTP, Harris County, TX: NPDES TX0127311 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MinorDischarger class
- 38Pollutants under a numeric limit
- 6Pollutants with an effluent exceedance
- 1Inspections on file
- 0Formal enforcement actions
HARRIS COUNTY MUD 434 WWTP, held by HARRIS CO MUD 434, holds NPDES permit TX0127311, which discharges to Hcfcdd K155-00-00, Cypress Creek. EPA’s file records it issued March 26, 2018 and expiring February 1, 2023.
HARRIS COUNTY MUD 434 WWTP, Harris County, Texas: Individual permit TX0127311, held by HARRIS CO MUD 434; Publicly owned treatment works; Administratively continued (past its expiration date and still in force until reissued); issued March 26, 2018, term to February 1, 2023; discharges to HCFCDD K155-00-00, CYPRESS CREEK.
- Solids, total suspended: 6 limits, 2 violations of any kind, 2 effluent exceedances, latest March 31, 2014, largest 67% over the limit.
- Chlorine, total residual: 2 limits, 2 violations of any kind, 2 effluent exceedances, latest January 31, 2018, largest 7% over the limit.
- E. coli: 2 limits, 3 violations of any kind, 1 effluent exceedance, latest September 30, 2025, largest 1,110% over the limit.
- pH: 3 limits, 2 violations of any kind, 1 effluent exceedance, latest October 31, 2025.
- Nitrogen, ammonia total [as N]: 6 limits, 1 violation of any kind, 1 effluent exceedance, latest August 31, 2024, largest 24% over the limit.
- Oxygen, dissolved [DO]: 1 limit, 1 violation of any kind, 1 effluent exceedance, latest February 28, 2026, largest 8% over the limit.
- Arsenic, dry weight: 5 limits, 5 violations of any kind, 0 effluent exceedances.
- Chromium, sludge, total, dry weight [as Cr]: 5 limits, 5 violations of any kind, 0 effluent exceedances.
- Selenium, dry weight: 3 limits, 3 violations of any kind, 0 effluent exceedances.
- Copper, dry weight: 3 limits, 3 violations of any kind, 0 effluent exceedances.
- Cadmium, dry weight: 3 limits, 3 violations of any kind, 0 effluent exceedances.
- Molybdenum, sludge, total, dry weight [as Mo]: 3 limits, 3 violations of any kind, 0 effluent exceedances.
- Zinc, sludge, total, dry weight [as Zn]: 3 limits, 3 violations of any kind, 0 effluent exceedances.
- Lead, sludge, total, dry weight [as Pb]: 3 limits, 3 violations of any kind, 0 effluent exceedances.
- Nickel, sludge, total, dry weight [as Ni]: 3 limits, 3 violations of any kind, 0 effluent exceedances.
- Mercury, sludge, total, dry weight [as Hg]: 3 limits, 3 violations of any kind, 0 effluent exceedances.
- Nickel, total [as Ni]: 2 limits, 2 violations of any kind, 0 effluent exceedances.
- Level of pathogen requirements achieved: 2 limits, 2 violations of any kind, 0 effluent exceedances.
- Description of pathogen option used: 2 limits, 2 violations of any kind, 0 effluent exceedances.
- Vector attraction reduction alternative used: 2 limits, 2 violations of any kind, 0 effluent exceedances.
- Fecal coliform: 1 limit, 1 violation of any kind, 0 effluent exceedances.
- Polychlorinated biphenyls [PCBs]: 1 limit, 1 violation of any kind, 0 effluent exceedances.
- Toxicity characteristic leaching procedure: 1 limit, 1 violation of any kind, 0 effluent exceedances.
- Ann. amt sludge disposed by other method: 1 limit, 1 violation of any kind, 0 effluent exceedances.
- Annual amt of sludge incinerated: 1 limit, 1 violation of any kind, 0 effluent exceedances.
- Annual sludge production, total: 1 limit, 1 violation of any kind, 0 effluent exceedances.
- Annual amount of sludge land applied: 1 limit, 1 violation of any kind, 0 effluent exceedances.
- Annual amt. sludge disposed surface unit: 1 limit, 1 violation of any kind, 0 effluent exceedances.
- Annual amt sludge disposed in landfill: 1 limit, 1 violation of any kind, 0 effluent exceedances.
- Annual amt sludge transported interstate: 1 limit, 1 violation of any kind, 0 effluent exceedances.
- Unit w/liner/leachate collection system: 1 limit, 1 violation of any kind, 0 effluent exceedances.
- Compliance w/part 258 sludge requirement: 1 limit, 1 violation of any kind, 0 effluent exceedances.
- Boundary areas: 1 limit, 1 violation of any kind, 0 effluent exceedances.
- Salmonella: 1 limit, 1 violation of any kind, 0 effluent exceedances.
- Pollutant table from 503.13: 1 limit, 1 violation of any kind, 0 effluent exceedances.
- BOD, carbonaceous [5 day, 20 C]: 6 limits, 0 violations of any kind, 0 effluent exceedances.
- Flow, in conduit or thru treatment plant: 4 limits, 0 violations of any kind, 0 effluent exceedances.
- Annual whole sludge application rate: 1 limit, 0 violations of any kind, 0 effluent exceedances.
- May 18, 2026: Permit Violations - Violation Specified in Comment (ST6).
- May 18, 2026: Evaluation (S).
- February 27, 2025: Permit Violations - Violation Specified in Comment (ST6).
- January 23, 2025: Permit Violations - Violation Specified in Comment (ST6).
Texas holds 1,720 Publicly owned treatment works coverages of this permit type in EPA’s file; 726 were issued before TX0127311.
Coverages issued nearest TX0127311
- March 26, 2018: NORTHWEST HARRIS COUNTY MUD 5 WWP 1, Houston, TX0072346, held by NORTHWEST HARRIS COUNTY MUD 5
- March 26, 2018: NW HARRIS COUNTY MUD 20 WWTP, Houston, TX0081337, held by NORTHWEST HARRISCOUNTY MUD 20
- March 26, 2018: RICHEY ROAD MUD WWTP, Westfield, TX0092967, held by RICHEY ROAD MUD
- March 26, 2018: HARRIS COUNTY MUD 344 WWTP, Houston, TX0104965, held by HARRIS COUNTY MUD 344
- March 26, 2018: HUNTER'S GLEN MUD WWTP, Houston, TX0118371, held by HUNTER'S GLEN MUD
- March 26, 2018: GRANT ROAD PUD WWTP, Cypress, TX0134627, held by GRANT ROAD PUD
- March 29, 2018: DOWDELL PUD WWTP, Houston, TX0026255, held by DOWDELL PUD
- March 29, 2018: CITY OF BELLEVUE, Bellevue, TX0027171
- March 29, 2018: LAKE FOREST REGIONAL WWTP, Houston, TX0046833, held by LAKE FOREST PLANT ADVISORY COUNCIL
- March 29, 2018: CHARTERWOOD MUD WWTP, Houston, TX0046841, held by CHARTERWOOD MUD
HARRIS COUNTY MUD 434 WWTP among its neighbors
Its county holds 4,455, 195 of them major permits; TX0127311 is a minor permit.
Other permits in the county
- 019-HOU3-22 HOUSTON CONCRETE SILOS, Houston: TXR1594NZ, minor permit, discharging to HOUSTON SHIP CHANNEL/BUFFALO BAYOU TIDAL, permit term to March 4, 2028
- 04868-1000 TOMBALL SAMS CLUB, Tomball: TXR1507VM, minor permit, discharging to WILLOW CREEK, permit term to March 4, 2028
- 04868-1000 TOMBALL SAMS CLUB, Tomball: TXR1563VQ, minor permit, discharging to WILLOW CREEK, permit term to March 4, 2028
- 10 055SF SHELL, Katy: TXR1598RM, minor permit, discharging to SOUTH MAYDE CREEK, permit term to March 4, 2028
- 10.1 ACRES ATASCOCITA RD, Humble: TXR1501OH, minor permit, discharging to GARNERS BAYOU, permit term to March 4, 2028
- 105 FARISH CIRCLE, Houston: TXR1583PJ, minor permit, discharging to BUFFALO BAYOU TIDAL, permit term to March 4, 2028
- 10910 GLEN HOLLOW, Houston: TXR1588SI, minor permit, discharging to SIMS BAYOU ABOVE TIDAL, permit term to March 4, 2028
- 1105 DEMOLITION, Houston: TXR1588SX, minor permit, discharging to RUMMEL CREEK, permit term to March 4, 2028
- 1111 FANNIN, Houston: TXR1556LZ, minor permit, permit term to March 4, 2028
- 11116 BELLAIRE BLVD, Houston: TXR1516PK, minor permit, discharging to BRAYS BAYOU ABOVE TIDAL, permit term to March 4, 2028
Identity
| Facility as filed | HARRIS COUNTY MUD 434 WWTP |
|---|---|
| Permittee as filed | HARRIS CO MUD 434 |
| NPDES ID | TX0127311 |
| Permit status | Administratively continued (past its expiration date and still in force until reissued) |
| Permit type | Individual permit |
| Discharger class | Minor discharger |
| Facility type | Publicly owned treatment works |
| Program | Publicly owned treatment works |
| Issued | March 26, 2018 |
| Expiration date | February 1, 2023 |
| Address | Harris County, TX 77433 |
| Receiving water | HCFCDD K155-00-00, CYPRESS CREEK |
| SIC | 4952 – Sewerage Systems |
Effluent limits and exceedances
- 38Pollutants on file
- 38Under a numeric limit
- 35With a violation of any kind
- 6With 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 |
|---|---|---|---|---|---|
| Solids, total suspended | 6 | 2 | 2 | March 31, 2014 | 67% over the limit |
| Chlorine, total residual | 2 | 2 | 2 | January 31, 2018 | 7% over the limit |
| E. coli | 2 | 3 | 1 | September 30, 2025 | 1,110% over the limit |
| pH | 3 | 2 | 1 | October 31, 2025 | |
| Nitrogen, ammonia total [as N] | 6 | 1 | 1 | August 31, 2024 | 24% over the limit |
| Oxygen, dissolved [DO] | 1 | 1 | 1 | February 28, 2026 | 8% over the limit |
| Arsenic, dry weight | 5 | 5 | 0 | ||
| Chromium, sludge, total, dry weight [as Cr] | 5 | 5 | 0 | ||
| Selenium, dry weight | 3 | 3 | 0 | ||
| Copper, dry weight | 3 | 3 | 0 | ||
| Cadmium, dry weight | 3 | 3 | 0 | ||
| Molybdenum, sludge, total, dry weight [as Mo] | 3 | 3 | 0 | ||
| Zinc, sludge, total, dry weight [as Zn] | 3 | 3 | 0 | ||
| Lead, sludge, total, dry weight [as Pb] | 3 | 3 | 0 | ||
| Nickel, sludge, total, dry weight [as Ni] | 3 | 3 | 0 | ||
| Mercury, sludge, total, dry weight [as Hg] | 3 | 3 | 0 | ||
| Nickel, total [as Ni] | 2 | 2 | 0 | ||
| Level of pathogen requirements achieved | 2 | 2 | 0 | ||
| Description of pathogen option used | 2 | 2 | 0 | ||
| Vector attraction reduction alternative used | 2 | 2 | 0 | ||
| Fecal coliform | 1 | 1 | 0 | ||
| Polychlorinated biphenyls [PCBs] | 1 | 1 | 0 | ||
| Toxicity characteristic leaching procedure | 1 | 1 | 0 | ||
| Ann. amt sludge disposed by other method | 1 | 1 | 0 | ||
| Annual amt of sludge incinerated | 1 | 1 | 0 | ||
| Annual sludge production, total | 1 | 1 | 0 | ||
| Annual amount of sludge land applied | 1 | 1 | 0 | ||
| Annual amt. sludge disposed surface unit | 1 | 1 | 0 | ||
| Annual amt sludge disposed in landfill | 1 | 1 | 0 | ||
| Annual amt sludge transported interstate | 1 | 1 | 0 | ||
| Unit w/liner/leachate collection system | 1 | 1 | 0 | ||
| Compliance w/part 258 sludge requirement | 1 | 1 | 0 | ||
| Boundary areas | 1 | 1 | 0 | ||
| Salmonella | 1 | 1 | 0 | ||
| Pollutant table from 503.13 | 1 | 1 | 0 | ||
| BOD, carbonaceous [5 day, 20 C] | 6 | 0 | 0 | ||
| Flow, in conduit or thru treatment plant | 4 | 0 | 0 | ||
| Annual whole sludge application rate | 1 | 0 | 0 |
Inspections, violations and enforcement
- 3Single-event violations
| Date | What EPA recorded | Agency |
|---|---|---|
| May 18, 2026 | Permit Violations - Violation Specified in Comment | ST6 |
| February 27, 2025 | Permit Violations - Violation Specified in Comment | ST6 |
| January 23, 2025 | Permit Violations - Violation Specified in Comment | ST6 |
Inspections
| Date | What EPA recorded | Agency |
|---|---|---|
| May 18, 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 TX0127311.
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Figures from EPA’s ICIS-NPDES download, loaded October 14, 2026.