Clean Water Act discharge permit · NPDES TX0047431
SOUTH MESQUITE CREEK REGIONAL WWTP, Mesquite, TX: NPDES TX0047431 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MajorDischarger class
- 53Pollutants under a numeric limit
- 5Pollutants with an effluent exceedance
- 1Inspections on file
- 0Formal enforcement actions
SOUTH MESQUITE CREEK REGIONAL WWTP, held by NORTH TEXAS MWD, holds NPDES permit TX0047431, which discharges to South Mesquite Creek, East Fork Tri. EPA’s file records it issued April 27, 2017 and expiring October 1, 2021.
SOUTH MESQUITE CREEK REGIONAL WWTP, Mesquite, Texas: Individual permit TX0047431, held by NORTH TEXAS MWD; Publicly owned treatment works; Administratively continued (past its expiration date and still in force until reissued); issued April 27, 2017, term to October 1, 2021; discharges to SOUTH MESQUITE CREEK, EAST FORK TRI.
- Flow, in conduit or thru treatment plant: 4 limits, 33 violations of any kind, 29 effluent exceedances, latest June 30, 2026, largest 26% over the limit.
- Nitrogen, ammonia total [as N]: 3 limits, 28 violations of any kind, 25 effluent exceedances, latest July 31, 2026, largest 257% over the limit.
- E. coli: 4 limits, 12 violations of any kind, 12 effluent exceedances, latest August 31, 2024, largest 514% over the limit.
- Solids, total suspended: 3 limits, 7 violations of any kind, 4 effluent exceedances, latest March 31, 2026, largest 106% over the limit.
- BOD, carbonaceous [5 day, 20 C]: 3 limits, 7 violations of any kind, 4 effluent exceedances, latest June 30, 2015, largest 66% over the limit.
- Copper, total [as Cu]: 3 limits, 6 violations of any kind, 0 effluent exceedances.
- Solids, total dissolved: 3 limits, 3 violations of any kind, 0 effluent exceedances.
- IC25 Low Flow Pass/Fail Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia: 4 limits, 2 violations of any kind, 0 effluent exceedances.
- IC25 Low Flow Pass/Fail Lethal Static Renewal 7 Day Chronic Pimephales promelas: 4 limits, 2 violations of any kind, 0 effluent exceedances.
- IC25 Low Flow Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia: 4 limits, 2 violations of any kind, 0 effluent exceedances.
- IC25 Low Flow Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Pimephales promelas: 4 limits, 2 violations of any kind, 0 effluent exceedances.
- IC25 Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia: 4 limits, 2 violations of any kind, 0 effluent exceedances.
- IC25 Lethal Static Renewal 7 Day Chronic Pimephales promelas: 4 limits, 2 violations of any kind, 0 effluent exceedances.
- IC25 Sub-Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia: 4 limits, 2 violations of any kind, 0 effluent exceedances.
- IC25 Sub-Lethal Static Renewal 7 Day Chronic Pimephales promelas: 4 limits, 2 violations of any kind, 0 effluent exceedances.
- pH: 3 limits, 2 violations of any kind, 0 effluent exceedances.
- Chlorine, total residual: 2 limits, 2 violations of any kind, 0 effluent exceedances.
- Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Ceriodaphnia dubia: 0 limits, 2 violations of any kind, 0 effluent exceedances.
- Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Pimephales promelas: 0 limits, 2 violations of any kind, 0 effluent exceedances.
- NOEC Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia: 0 limits, 2 violations of any kind, 0 effluent exceedances.
- NOEC Lethal Static Renewal 7 Day Chronic Pimephales promelas: 0 limits, 2 violations of any kind, 0 effluent exceedances.
- NOEC Sub-Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia: 0 limits, 2 violations of any kind, 0 effluent exceedances.
- NOEC Sub-Lethal Static Renewal 7 Day Chronic Pimephales promelas: 0 limits, 2 violations of any kind, 0 effluent exceedances.
- Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia: 0 limits, 2 violations of any kind, 0 effluent exceedances.
- Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Pinephales promelas: 0 limits, 2 violations of any kind, 0 effluent exceedances.
- LOEC Lethal Survival Static Renewal 7 Day Chronic Ceriodaphnia dubia: 0 limits, 2 violations of any kind, 0 effluent exceedances.
- LOEC Lethal Survival Static Renewal 7 Day Chronic Pimephales promelas: 0 limits, 2 violations of any kind, 0 effluent exceedances.
- LOEC Sub-Lethal Reproduction Static Renewal 7 Day Chronic Ceriodaphnia dubia: 0 limits, 2 violations of any kind, 0 effluent exceedances.
- LOEC Sub-Lethal Reproduction Static Renewal 7 Day Chronic Pimephales promelas: 0 limits, 2 violations of any kind, 0 effluent exceedances.
- Oxygen, dissolved [DO]: 1 limit, 1 violation of any kind, 0 effluent exceedances.
- LC50 Pass/Fail Static 24Hr Acute D. Pulex: 1 limit, 1 violation of any kind, 0 effluent exceedances.
- LC50 Pass/Fail Static 24Hr Acute Pimephales promelas: 1 limit, 1 violation of any kind, 0 effluent exceedances.
- Whole effluent toxicity - retest #1: 7 limits, 0 violations of any kind, 0 effluent exceedances.
- Whole effluent toxicity - retest #2: 7 limits, 0 violations of any kind, 0 effluent exceedances.
- Arsenic, dry weight: 5 limits, 0 violations of any kind, 0 effluent exceedances.
- Chromium, sludge, total, dry weight [as Cr]: 5 limits, 0 violations of any kind, 0 effluent exceedances.
- Sulfate, total [as SO4]: 3 limits, 0 violations of any kind, 0 effluent exceedances.
- Selenium, dry weight: 3 limits, 0 violations of any kind, 0 effluent exceedances.
- Copper, dry weight: 3 limits, 0 violations of any kind, 0 effluent exceedances.
- Cadmium, dry weight: 3 limits, 0 violations of any kind, 0 effluent exceedances.
- Molybdenum, sludge, total, dry weight [as Mo]: 3 limits, 0 violations of any kind, 0 effluent exceedances.
- Zinc, sludge, total, dry weight [as Zn]: 3 limits, 0 violations of any kind, 0 effluent exceedances.
- Lead, sludge, total, dry weight [as Pb]: 3 limits, 0 violations of any kind, 0 effluent exceedances.
- Nickel, sludge, total, dry weight [as Ni]: 3 limits, 0 violations of any kind, 0 effluent exceedances.
- Mercury, sludge, total, dry weight [as Hg]: 3 limits, 0 violations of any kind, 0 effluent exceedances.
- Nickel, total [as Ni]: 2 limits, 0 violations of any kind, 0 effluent exceedances.
- Level of pathogen requirements achieved: 2 limits, 0 violations of any kind, 0 effluent exceedances.
- Description of pathogen option used: 2 limits, 0 violations of any kind, 0 effluent exceedances.
- Vector attraction reduction alternative used: 2 limits, 0 violations of any kind, 0 effluent exceedances.
- Fecal coliform: 1 limit, 0 violations of any kind, 0 effluent exceedances.
- Polychlorinated biphenyls [PCBs]: 1 limit, 0 violations of any kind, 0 effluent exceedances.
- Toxicity characteristic leaching procedure: 1 limit, 0 violations of any kind, 0 effluent exceedances.
- Annual whole sludge application rate: 1 limit, 0 violations of any kind, 0 effluent exceedances.
- Ann. amt sludge disposed by other method: 1 limit, 0 violations of any kind, 0 effluent exceedances.
- Annual amt of sludge incinerated: 1 limit, 0 violations of any kind, 0 effluent exceedances.
- Annual sludge production, total: 1 limit, 0 violations of any kind, 0 effluent exceedances.
- Annual amount of sludge land applied: 1 limit, 0 violations of any kind, 0 effluent exceedances.
- Annual amt. sludge disposed surface unit: 1 limit, 0 violations of any kind, 0 effluent exceedances.
- Annual amt sludge disposed in landfill: 1 limit, 0 violations of any kind, 0 effluent exceedances.
- Annual amt sludge transported interstate: 1 limit, 0 violations of any kind, 0 effluent exceedances.
- March 24, 2026: Focused (S).
- December 12, 2025: Permit Violations - Violation Specified in Comment (ST6).
- September 24, 2024: Permit Violations - Violation Specified in Comment (ST6).
- December 15, 2022: Permit Violations - Violation Specified in Comment (ST6).
- April 29, 2021: Permit Violations - Violation Specified in Comment (ST6).
- May 4, 2020: Permit Violations - Violation Specified in Comment (ST6).
- March 11, 2020: Permit Violations - Violation Specified in Comment (ST6).
- November 29, 2018: Permit Violations - Violation Specified in Comment (ST6).
Texas holds 1,720 Publicly owned treatment works coverages of this permit type in EPA’s file; 445 were issued before TX0047431. NORTH TEXAS MWD holds 12 permits in Texas.
Other permits held by NORTH TEXAS MWD
- WYLIE WTP, Wylie: TX0002143, issued May 21, 2014
- SQUABBLE CREEK WWTP, Rockwall County: TX0022241, issued April 19, 2017
- WYLIE WWTP, Wylie: TX0025950, issued September 30, 2008
- ROWLETT CREEK REGIONAL WWTP, Plano: TX0047911, issued January 23, 2017
- BUFFALO CREEK WWTP, Rockwall: TX0078565, issued February 21, 2018
- WILSON CREEK REGIONAL WWTP, Lucas: TX0088633, issued October 26, 2017
- STEWART CREEK WEST WWTP, Denton County: TX0103501, issued August 31, 2017
- PANTHER CREEK WWTP, Denton County: TX0123901, issued April 14, 2021
- TAWAKONI WTP, Terrell: TX0133281, issued June 23, 2016
- NTMWD LEONARD WTP, Leonard: TX0133671, issued January 3, 2018
Coverages issued nearest TX0047431
- April 11, 2017: ADDICKS UD WWTP, Houston, TX0112585, held by ADDICKS UTILITY DISTRICT
- April 19, 2017: SQUABBLE CREEK WWTP, Rockwall County, TX0022241, held by NORTH TEXAS MWD
- April 19, 2017: CITY OF PILOT POINT WWTP, Pilot Point, TX0022659, held by PILOT POINT, CITY OF
- April 19, 2017: EAST TEXAS MUD OF SMITH COUNTY WWTP, Tyler, TX0032484, held by EAST TEXAS MUD OF SMITH COUNTY
- April 21, 2017: RIVERBEND REGIONAL WATER RECLAMATION PLANT, Lewisville, TX0123781, held by UPPER TRINITY REGIONAL WATER DISTRICT
- April 28, 2017: MEMORIAL POINT UTILITY WWTP, Livingston, TX0022845, held by MEMORIAL POINT UTILITY DISTRICT
- April 28, 2017: CITY OF CHICO, Chico, TX0023787
- April 28, 2017: SCURRY-ROSSER WWTF, Scurry, TX0126128, held by SCURRY-ROSSER ISD
- May 2, 2017: CITY OF GROVETON WWTF, Groveton, TX0076104, held by CITY OF GROVETON
- May 2, 2017: CITY OF MOUNT ENTERPRISE WWTP, Mount Enterprise, TX0122173, held by CITY OF MOUNT ENTERPRISE
SOUTH MESQUITE CREEK REGIONAL WWTP among its neighbors
EPA’s permit file holds 86 discharge permits in the South Mesquite Creek subwatershed (HUC 120301060504), TX0047431 among them. Its county holds 1,595, 15 of them major permits; TX0047431 is a major permit.
Other permits in the South Mesquite Creek subwatershed (HUC 120301060504)
- 3220 US-80 IMPORT FOR FUTURE CONSTRUCTION, Mesquite: TXR1540QB, minor permit, discharging to S MESQUITE CREEK, permit term to March 4, 2028
- 5621-1000 MESQUITE WALMART, Mesquite: TXR1574WI, minor permit, discharging to SOUTH MESQUITE CREEK, permit term to March 4, 2028
- 5621-1000 MESQUITE WALMART, Mesquite: TXR1586WI, minor permit, discharging to SOUTH MESQUITE CREEK, permit term to March 4, 2028
- AMAZONCOM SERVICES AFW5, Balch Springs: TXR05EY47, minor permit, permit term to August 13, 2026
- ARCADIA TRAILS, Balch Springs: TXR1502TY, minor permit, discharging to UNNAMED TRIBUTARY OF SOUTH MESQUITE CREEK, permit term to March 4, 2028
- ARCADIA TRAILS PHASE 2 BP AND PAVING, Balch Springs: TXR1506PA, minor permit, discharging to SOUTH MESQUITE CREEK, permit term to March 4, 2028
- BALCH SPRINGS PLANT, Mesquite: TXG110462, minor permit, discharging to DRAINAGE DITCH TO SOUTH MESQUIE CK, permit term to November 7, 2011
- BALCH SPRINGS PLANT, Balch Springs: TXG111839, minor permit, discharging to SOUTH MESQUITE CREEK, permit term to November 7, 2016
- BALCH SPRINGS PLANT, Balch Springs: TXG112879, minor permit, permit term to November 6, 2021
- BJS WHOLESALE MEMEBERSHIP CLUB, Mesquite: TXR1594WF, minor permit, discharging to UNNAMED TRIBUTARY TO MESQUITE CREEK, permit term to March 4, 2028
Identity
| Facility as filed | SOUTH MESQUITE CREEK REGIONAL WWTP |
|---|---|
| Permittee as filed | NORTH TEXAS MWD |
| NPDES ID | TX0047431 |
| 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 | April 27, 2017 |
| Expiration date | October 1, 2021 |
| Address | Mesquite, TX 75098 |
| Receiving water | SOUTH MESQUITE CREEK, EAST FORK TRI |
| Subwatershed | South Mesquite Creek (HUC 120301060504) |
| Program components on file | POTW, Pretreatment |
| SIC | 4952 – Sewerage Systems |
Effluent limits and exceedances
- 65Pollutants on file
- 53Under a numeric limit
- 32With a violation of any kind
- 5With 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; the 60 with the most exceedances of 65 are shown.
| Pollutant or measure | Limits | Violations, any kind | Effluent exceedances | Latest exceedance | Largest exceedance, as filed |
|---|---|---|---|---|---|
| Flow, in conduit or thru treatment plant | 4 | 33 | 29 | June 30, 2026 | 26% over the limit |
| Nitrogen, ammonia total [as N] | 3 | 28 | 25 | July 31, 2026 | 257% over the limit |
| E. coli | 4 | 12 | 12 | August 31, 2024 | 514% over the limit |
| Solids, total suspended | 3 | 7 | 4 | March 31, 2026 | 106% over the limit |
| BOD, carbonaceous [5 day, 20 C] | 3 | 7 | 4 | June 30, 2015 | 66% over the limit |
| Copper, total [as Cu] | 3 | 6 | 0 | ||
| Solids, total dissolved | 3 | 3 | 0 | ||
| IC25 Low Flow Pass/Fail Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia | 4 | 2 | 0 | ||
| IC25 Low Flow Pass/Fail Lethal Static Renewal 7 Day Chronic Pimephales promelas | 4 | 2 | 0 | ||
| IC25 Low Flow Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia | 4 | 2 | 0 | ||
| IC25 Low Flow Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Pimephales promelas | 4 | 2 | 0 | ||
| IC25 Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia | 4 | 2 | 0 | ||
| IC25 Lethal Static Renewal 7 Day Chronic Pimephales promelas | 4 | 2 | 0 | ||
| IC25 Sub-Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia | 4 | 2 | 0 | ||
| IC25 Sub-Lethal Static Renewal 7 Day Chronic Pimephales promelas | 4 | 2 | 0 | ||
| pH | 3 | 2 | 0 | ||
| Chlorine, total residual | 2 | 2 | 0 | ||
| Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Ceriodaphnia dubia | 0 | 2 | 0 | ||
| Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Pimephales promelas | 0 | 2 | 0 | ||
| NOEC Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia | 0 | 2 | 0 | ||
| NOEC Lethal Static Renewal 7 Day Chronic Pimephales promelas | 0 | 2 | 0 | ||
| NOEC Sub-Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia | 0 | 2 | 0 | ||
| NOEC Sub-Lethal Static Renewal 7 Day Chronic Pimephales promelas | 0 | 2 | 0 | ||
| Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia | 0 | 2 | 0 | ||
| Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Pinephales promelas | 0 | 2 | 0 | ||
| LOEC Lethal Survival Static Renewal 7 Day Chronic Ceriodaphnia dubia | 0 | 2 | 0 | ||
| LOEC Lethal Survival Static Renewal 7 Day Chronic Pimephales promelas | 0 | 2 | 0 | ||
| LOEC Sub-Lethal Reproduction Static Renewal 7 Day Chronic Ceriodaphnia dubia | 0 | 2 | 0 | ||
| LOEC Sub-Lethal Reproduction Static Renewal 7 Day Chronic Pimephales promelas | 0 | 2 | 0 | ||
| Oxygen, dissolved [DO] | 1 | 1 | 0 | ||
| LC50 Pass/Fail Static 24Hr Acute D. Pulex | 1 | 1 | 0 | ||
| LC50 Pass/Fail Static 24Hr Acute Pimephales promelas | 1 | 1 | 0 | ||
| Whole effluent toxicity - retest #1 | 7 | 0 | 0 | ||
| Whole effluent toxicity - retest #2 | 7 | 0 | 0 | ||
| Arsenic, dry weight | 5 | 0 | 0 | ||
| Chromium, sludge, total, dry weight [as Cr] | 5 | 0 | 0 | ||
| Sulfate, total [as SO4] | 3 | 0 | 0 | ||
| Selenium, dry weight | 3 | 0 | 0 | ||
| Copper, dry weight | 3 | 0 | 0 | ||
| Cadmium, dry weight | 3 | 0 | 0 | ||
| Molybdenum, sludge, total, dry weight [as Mo] | 3 | 0 | 0 | ||
| Zinc, sludge, total, dry weight [as Zn] | 3 | 0 | 0 | ||
| Lead, sludge, total, dry weight [as Pb] | 3 | 0 | 0 | ||
| Nickel, sludge, total, dry weight [as Ni] | 3 | 0 | 0 | ||
| Mercury, sludge, total, dry weight [as Hg] | 3 | 0 | 0 | ||
| Nickel, total [as Ni] | 2 | 0 | 0 | ||
| Level of pathogen requirements achieved | 2 | 0 | 0 | ||
| Description of pathogen option used | 2 | 0 | 0 | ||
| Vector attraction reduction alternative used | 2 | 0 | 0 | ||
| Fecal coliform | 1 | 0 | 0 | ||
| Polychlorinated biphenyls [PCBs] | 1 | 0 | 0 | ||
| Toxicity characteristic leaching procedure | 1 | 0 | 0 | ||
| Annual whole sludge application rate | 1 | 0 | 0 | ||
| Ann. amt sludge disposed by other method | 1 | 0 | 0 | ||
| Annual amt of sludge incinerated | 1 | 0 | 0 | ||
| Annual sludge production, total | 1 | 0 | 0 | ||
| Annual amount of sludge land applied | 1 | 0 | 0 | ||
| Annual amt. sludge disposed surface unit | 1 | 0 | 0 | ||
| Annual amt sludge disposed in landfill | 1 | 0 | 0 | ||
| Annual amt sludge transported interstate | 1 | 0 | 0 |
Inspections, violations and enforcement
- 7Single-event violations
| Date | What EPA recorded | Agency |
|---|---|---|
| December 12, 2025 | Permit Violations - Violation Specified in Comment | ST6 |
| September 24, 2024 | Permit Violations - Violation Specified in Comment | ST6 |
| December 15, 2022 | Permit Violations - Violation Specified in Comment | ST6 |
| April 29, 2021 | Permit Violations - Violation Specified in Comment | ST6 |
| May 4, 2020 | Permit Violations - Violation Specified in Comment | ST6 |
| March 11, 2020 | Permit Violations - Violation Specified in Comment | ST6 |
| November 29, 2018 | Permit Violations - Violation Specified in Comment | ST6 |
Inspections
| Date | What EPA recorded | Agency |
|---|---|---|
| March 24, 2026 | Focused | 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 TX0047431.
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Figures from EPA’s ICIS-NPDES download, loaded October 14, 2026.