Clean Water Act discharge permit · NPDES TX0022241
SQUABBLE CREEK WWTP, Rockwall County, TX: NPDES TX0022241 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MajorDischarger class
- 50Pollutants under a numeric limit
- 4Pollutants with an effluent exceedance
- 0Inspections on file
- 0Formal enforcement actions
SQUABBLE CREEK WWTP, held by NORTH TEXAS MWD, holds NPDES permit TX0022241, which discharges to Squabble Creek; Lake Ray Hubbard. EPA’s file records it issued April 19, 2017 and expiring October 1, 2021.
SQUABBLE CREEK WWTP, Rockwall County, Texas: Individual permit TX0022241, held by NORTH TEXAS MWD; Publicly owned treatment works; Administratively continued (past its expiration date and still in force until reissued); issued April 19, 2017, term to October 1, 2021; discharges to SQUABBLE CREEK; LAKE RAY HUBBARD.
- Flow, in conduit or thru treatment plant: 4 limits, 56 violations of any kind, 52 effluent exceedances, latest June 30, 2025, largest 99,999% over the limit.
- Nitrogen, ammonia total [as N]: 3 limits, 10 violations of any kind, 7 effluent exceedances, latest July 31, 2011, largest 192% over the limit.
- E. coli: 2 limits, 3 violations of any kind, 3 effluent exceedances, latest February 28, 2019, largest 99,999% over the limit.
- BOD, carbonaceous [5 day, 20 C]: 3 limits, 5 violations of any kind, 2 effluent exceedances, latest February 28, 2022, largest 27% over the limit.
- IC25 Low Flow Pass/Fail Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia: 2 limits, 6 violations of any kind, 0 effluent exceedances.
- IC25 Low Flow Pass/Fail Lethal Static Renewal 7 Day Chronic Pimephales promelas: 2 limits, 6 violations of any kind, 0 effluent exceedances.
- IC25 Low Flow Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia: 2 limits, 6 violations of any kind, 0 effluent exceedances.
- IC25 Low Flow Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Pimephales promelas: 2 limits, 6 violations of any kind, 0 effluent exceedances.
- IC25 Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia: 2 limits, 6 violations of any kind, 0 effluent exceedances.
- IC25 Lethal Static Renewal 7 Day Chronic Pimephales promelas: 2 limits, 6 violations of any kind, 0 effluent exceedances.
- IC25 Sub-Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia: 2 limits, 6 violations of any kind, 0 effluent exceedances.
- IC25 Sub-Lethal Static Renewal 7 Day Chronic Pimephales promelas: 2 limits, 6 violations of any kind, 0 effluent exceedances.
- Solids, total suspended: 3 limits, 3 violations of any kind, 0 effluent exceedances.
- Sulfate, total [as SO4]: 0 limits, 3 violations of any kind, 0 effluent exceedances.
- Solids, total dissolved: 0 limits, 3 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.
- Oxygen, dissolved [DO]: 1 limit, 1 violation of any kind, 0 effluent exceedances.
- Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Ceriodaphnia dubia: 0 limits, 1 violation of any kind, 0 effluent exceedances.
- NOEC Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia: 0 limits, 1 violation of any kind, 0 effluent exceedances.
- NOEC Sub-Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia: 0 limits, 1 violation 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.
- Selenium, dry weight: 3 limits, 0 violations 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.
- 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.
- Unit w/liner/leachate collection system: 1 limit, 0 violations of any kind, 0 effluent exceedances.
- Compliance w/part 258 sludge requirement: 1 limit, 0 violations of any kind, 0 effluent exceedances.
- Boundary areas: 1 limit, 0 violations of any kind, 0 effluent exceedances.
- Salmonella: 1 limit, 0 violations of any kind, 0 effluent exceedances.
- Pollutant table from 503.13: 1 limit, 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.
- November 29, 2023: Permit Violations - Violation Specified in Comment (ST6).
- March 8, 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; 441 were issued before TX0022241. NORTH TEXAS MWD holds 12 permits in Texas.
Other permits held by NORTH TEXAS MWD
- WYLIE WTP, Wylie: TX0002143, issued May 21, 2014
- WYLIE WWTP, Wylie: TX0025950, issued September 30, 2008
- SOUTH MESQUITE CREEK REGIONAL WWTP, Mesquite: TX0047431, issued April 27, 2017
- 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 TX0022241
- April 5, 2017: CITY OF STREETMAN WWTP, Streetman, TX0072338, held by STREETMAN, CITY OF
- April 6, 2017: TEN MILE CREEK WWTP, City Of Ferris, TX0022811, held by TRINITY RIVER AUTHORITY OF TEXAS
- April 6, 2017: ROLLING FORK PUD WWTP, Houston, TX0026697, held by ROLLING FORK PUBLIC UTILITY DISTRICT
- April 6, 2017: CITY OF DEVERS WWTP, Devers, TX0071510, held by CITY OF DEVERS
- April 11, 2017: ADDICKS UD WWTP, Houston, TX0112585, held by ADDICKS UTILITY DISTRICT
- 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 27, 2017: SOUTH MESQUITE CREEK REGIONAL WWTP, Mesquite, TX0047431, held by NORTH TEXAS MWD
- April 28, 2017: MEMORIAL POINT UTILITY WWTP, Livingston, TX0022845, held by MEMORIAL POINT UTILITY DISTRICT
SQUABBLE CREEK WWTP among its neighbors
EPA’s permit file holds 74 discharge permits in the Cottonwood Creek-East Fork Trinity River subwatershed (HUC 120301060402), TX0022241 among them. Its county holds 219, 3 of them major permits; TX0022241 is a major permit.
Other permits in the Cottonwood Creek-East Fork Trinity River subwatershed (HUC 120301060402)
- 260 FOX HOLLOW BEAVER CREEK ESTATES - HOME BUILDING, Wylie: TXR1502YQ, minor permit, discharging to LAKE RAY HUBBARD, permit term to March 4, 2028
- BOXCAR 150MW300 MWH BESS & 13834.5KV SUBSTATION, Wylie: TXR1585VU, minor permit, discharging to LAKE RAY HUBBARD, permit term to March 4, 2028
- CITY OF ROCKWALL MS4, Rockwall: TXR040278, minor permit, permit term to January 24, 2024
- CITY OF WYLIE FM 544 RECONSTRUCTION, Wylie: TXR1575PR, minor permit, discharging to TRIBUTARY OF LAKE RAY HUBBARD, permit term to March 4, 2028
- CITY OF WYLIE MS4, Wylie: TXR040075, minor permit, discharging to UNNAMED TRIBUTARIES, permit term to January 23, 2024
- CROSSPOINT COMMUNITY CHURCH, Rockwall: TXR1558XY, minor permit, discharging to SQUABBLE CREEK, permit term to March 4, 2028
- DUWEST ROCKWALL, Rockwall: TXR1504QN, minor permit, discharging to SQUABBLE CREEK, permit term to March 4, 2028
- FLORIDAYS SAPPHIRE BAY - EAST BLOCK, Rowlett: TXR1577MR, minor permit, discharging to LAKE RAY HUBBARD, permit term to March 4, 2028
- GIDEON GROVE, Rockwall: TXR1546SF, minor permit, discharging to SQUABBLE CREEK, permit term to March 4, 2028
- GOLIAD FLEXSPACE, Rockwall: TXR1526XH, minor permit, discharging to TRIBUTARY OF LAKE RAY HUBBARD, permit term to March 4, 2028
Identity
| Facility as filed | SQUABBLE CREEK WWTP |
|---|---|
| Permittee as filed | NORTH TEXAS MWD |
| NPDES ID | TX0022241 |
| 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 19, 2017 |
| Expiration date | October 1, 2021 |
| Address | Rockwall County, TX 75087 |
| Receiving water | SQUABBLE CREEK; LAKE RAY HUBBARD |
| Subwatershed | Cottonwood Creek-East Fork Trinity River (HUC 120301060402) |
| SIC | 4952 – Sewerage Systems |
Effluent limits and exceedances
- 55Pollutants on file
- 50Under a numeric limit
- 21With a violation of any kind
- 4With 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 | 56 | 52 | June 30, 2025 | 99,999% over the limit |
| Nitrogen, ammonia total [as N] | 3 | 10 | 7 | July 31, 2011 | 192% over the limit |
| E. coli | 2 | 3 | 3 | February 28, 2019 | 99,999% over the limit |
| BOD, carbonaceous [5 day, 20 C] | 3 | 5 | 2 | February 28, 2022 | 27% over the limit |
| IC25 Low Flow Pass/Fail Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia | 2 | 6 | 0 | ||
| IC25 Low Flow Pass/Fail Lethal Static Renewal 7 Day Chronic Pimephales promelas | 2 | 6 | 0 | ||
| IC25 Low Flow Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia | 2 | 6 | 0 | ||
| IC25 Low Flow Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Pimephales promelas | 2 | 6 | 0 | ||
| IC25 Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia | 2 | 6 | 0 | ||
| IC25 Lethal Static Renewal 7 Day Chronic Pimephales promelas | 2 | 6 | 0 | ||
| IC25 Sub-Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia | 2 | 6 | 0 | ||
| IC25 Sub-Lethal Static Renewal 7 Day Chronic Pimephales promelas | 2 | 6 | 0 | ||
| Solids, total suspended | 3 | 3 | 0 | ||
| Sulfate, total [as SO4] | 0 | 3 | 0 | ||
| Solids, total dissolved | 0 | 3 | 0 | ||
| pH | 3 | 2 | 0 | ||
| Chlorine, total residual | 2 | 2 | 0 | ||
| Oxygen, dissolved [DO] | 1 | 1 | 0 | ||
| Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Ceriodaphnia dubia | 0 | 1 | 0 | ||
| NOEC Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia | 0 | 1 | 0 | ||
| NOEC Sub-Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia | 0 | 1 | 0 | ||
| Arsenic, dry weight | 5 | 0 | 0 | ||
| Chromium, sludge, total, dry weight [as Cr] | 5 | 0 | 0 | ||
| Selenium, dry weight | 3 | 0 | 0 | ||
| Whole effluent toxicity - retest #1 | 3 | 0 | 0 | ||
| Whole effluent toxicity - retest #2 | 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 | ||
| Unit w/liner/leachate collection system | 1 | 0 | 0 | ||
| Compliance w/part 258 sludge requirement | 1 | 0 | 0 | ||
| Boundary areas | 1 | 0 | 0 | ||
| Salmonella | 1 | 0 | 0 | ||
| Pollutant table from 503.13 | 1 | 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
- 2Single-event violations
| Date | What EPA recorded | Agency |
|---|---|---|
| November 29, 2023 | Permit Violations - Violation Specified in Comment | ST6 |
| March 8, 2018 | Permit Violations - Violation Specified in Comment | ST6 |
Inspections
EPA’s inspection file holds no inspection for NPDES TX0022241.
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 TX0022241.
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Figures from EPA’s ICIS-NPDES download, loaded October 14, 2026.