NPDES TX0020711 · Clean Water Act
TOWN OF FLOWER MOUND WWTP, Flower Mound, TX: NPDES TX0020711 discharge permit, effluent exceedances, inspections, penalties
TOWN OF FLOWER MOUND WWTP, Flower Mound, Texas: Individual permit TX0020711, held by FLOWER MOUND, TOWN OF; Publicly owned treatment works; Administratively continued; issued May 30, 2017, term to September 1, 2021; discharges to BAKERS BRANCH, DENTON CREEK.
13 of the 54 pollutants listed for NPDES TX0020711 have no violation or effluent exceedance.
- Nitrogen, ammonia total [as N]: 3 limits, 22 violations of any kind, 16 effluent exceedances, latest December 31, 2025, largest 86% over the limit.
- Solids, total suspended: 3 limits, 19 violations of any kind, 13 effluent exceedances, latest April 30, 2026, largest 675% over the limit.
- E. coli: 2 limits, 8 violations of any kind, 8 effluent exceedances, latest December 31, 2025, largest 404% over the limit.
- Oxygen, dissolved [DO]: 1 limit, 5 violations of any kind, 3 effluent exceedances, latest October 31, 2024, largest 11% over the limit.
- Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Ceriodaphnia dubia: 4 limits, 10 violations of any kind.
- Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Pimephales promelas: 4 limits, 10 violations of any kind.
- NOEC Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia: 4 limits, 10 violations of any kind.
- NOEC Lethal Static Renewal 7 Day Chronic Pimephales promelas: 4 limits, 10 violations of any kind.
- NOEC Sub-Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia: 4 limits, 10 violations of any kind.
- NOEC Sub-Lethal Static Renewal 7 Day Chronic Pimephales promelas: 4 limits, 10 violations of any kind.
- Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia: 4 limits, 10 violations of any kind.
- Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Pinephales promelas: 4 limits, 10 violations of any kind.
- LOEC Lethal Survival Static Renewal 7 Day Chronic Ceriodaphnia dubia: 4 limits, 10 violations of any kind.
- LOEC Lethal Survival Static Renewal 7 Day Chronic Pimephales promelas: 4 limits, 10 violations of any kind.
- LOEC Sub-Lethal Reproduction Static Renewal 7 Day Chronic Ceriodaphnia dubia: 4 limits, 10 violations of any kind.
- LOEC Sub-Lethal Reproduction Static Renewal 7 Day Chronic Pimephales promelas: 4 limits, 10 violations of any kind.
- Flow, in conduit or thru treatment plant: 4 limits, 9 violations of any kind.
- pH: 3 limits, 7 violations of any kind.
- Chromium, sludge, total, dry weight [as Cr]: 5 limits, 6 violations of any kind.
- BOD, carbonaceous [5 day, 20 C]: 3 limits, 6 violations of any kind.
- Arsenic, dry weight: 5 limits, 5 violations of any kind.
- Selenium, dry weight: 3 limits, 4 violations of any kind.
- Copper, dry weight: 3 limits, 4 violations of any kind.
- Cadmium, dry weight: 3 limits, 4 violations of any kind.
- Molybdenum, sludge, total, dry weight [as Mo]: 3 limits, 4 violations of any kind.
- Zinc, sludge, total, dry weight [as Zn]: 3 limits, 4 violations of any kind.
- Lead, sludge, total, dry weight [as Pb]: 3 limits, 4 violations of any kind.
- Nickel, sludge, total, dry weight [as Ni]: 3 limits, 4 violations of any kind.
- Mercury, sludge, total, dry weight [as Hg]: 3 limits, 4 violations of any kind.
- Coliform, fecal general: 0 limits, 4 violations of any kind.
- LC50 Pass/Fail Static 24Hr Acute D. Pulex: 1 limit, 3 violations of any kind.
- LC50 Pass/Fail Static 24Hr Acute Pimephales promelas: 1 limit, 3 violations of any kind.
- Nickel, total [as Ni]: 2 limits, 2 violations of any kind.
- Level of pathogen requirements achieved: 2 limits, 2 violations of any kind.
- Description of pathogen option used: 2 limits, 2 violations of any kind.
- Vector attraction reduction alternative used: 2 limits, 2 violations of any kind.
- Salmonella: 1 limit, 2 violations of any kind.
- Fecal coliform: 1 limit, 1 violation of any kind.
- Unit w/liner/leachate collection system: 1 limit, 1 violation of any kind.
- Boundary areas: 1 limit, 1 violation of any kind.
- Pollutant table from 503.13: 1 limit, 1 violation of any kind.
- Whole effluent toxicity - retest #1: 7 limits.
- Whole effluent toxicity - retest #2: 7 limits.
- Polychlorinated biphenyls [PCBs]: 1 limit.
- Toxicity characteristic leaching procedure: 1 limit.
- Annual whole sludge application rate: 1 limit.
- Ann. amt sludge disposed by other method: 1 limit.
- Annual amt of sludge incinerated: 1 limit.
- Annual sludge production, total: 1 limit.
- Annual amount of sludge land applied: 1 limit.
- Annual amt. sludge disposed surface unit: 1 limit.
- Annual amt sludge disposed in landfill: 1 limit.
- Annual amt sludge transported interstate: 1 limit.
- Compliance w/part 258 sludge requirement: 1 limit.
- April 3, 2025: Permit Violations - Violation Specified in Comment (ST6).
- January 25, 2023: Permit Violations - Violation Specified in Comment (ST6).
Texas holds 1,720 Publicly owned treatment works coverages of this permit type in EPA’s file; 470 were issued before TX0020711.
Coverages issued nearest TX0020711
- 2017-05-16: CITY OF BARDWELL WWTP, Bardwell: TX0026581, held by CITY OF BARDWELL
- 2017-05-24: TDJC COFFIELD UNIT, Anderson County: TX0031577, held by TEXAS DEPARTMENT OF CRIMINAL JUSTICE
- 2017-05-24: KATY ISD MAYDE CREEK WWTP, Katy: TX0079201, held by KATY ISD
- 2017-05-24: HARRIS COUNTY MUD 149 WWTP, Houston: TX0091626, held by HARRIS COUNTY MUD 149
- 2017-05-24: CITY OF JOSEPHINE WWTP 2, City Of Josephine: TX0137332, held by JOSEPHINE, CITY OF
- 2017-05-30: CITY OF ELKHART WWTP, Elkhart: TX0022578, held by ELKHART, CITY OF
- 2017-05-30: HARRIS-FORT BEND COUNTIES MUD 5 WWTP, Fort Bend County: TX0115894, held by HARRIS-FORT BEND COUNTIES MUD NO. 5
- 2017-05-30: CITY OF MARQUEZ WWTP, Marquez: TX0117579, held by MARQUEZ, CITY OF
- 2017-05-30: HARRIS-FORT BEND COUNTIES MUD 3 WWTP, Houston: TX0124451, held by HARRIS-FORT BEND COUNTIES MUD 3
- 2017-05-30: CITY OF BEDIAS WWTF, Bedias: TX0129895, held by BEDIAS, CITY OF
TOWN OF FLOWER MOUND WWTP among its neighbors
39 discharge permits are in the Cottonwood Branch-Denton Creek subwatershed (HUC 120301040307); TX0020711 is one. Its county: 1,238, 16 major; TX0020711 is major permit.
Other permits in the Cottonwood Branch-Denton Creek subwatershed (HUC 120301040307)
- ABR CONCRETE BATCH PLANT, Dfw Airport: TXG113293, minor, term to 2026-11-06
- BARCEL USA, Coppell: TXR05FT17, minor, term to 2026-08-13
- BEST BUY WAREHOUSING LOGISTICS, Flower Mound: TXRNECE18, minor, term to 2026-08-13
- BOX AT LAKESIDE AND SILVERON, Flower Mound: TXR1519SO, minor, term to 2028-03-04
- CITY FUTSAL GRAPEVINE MILLS CROSSING ADDITION, Grapevine: TXR1540YK, minor, term to 2028-03-04
- CITY OF COPPELL MS4, Coppell: TXR040375, minor, term to 2024-01-24
- CONCRETE BATCH PLANT SUPPORTING BLACKBERRY FARMS, Coppell: TXR1573NK, minor, term to 2028-03-04
- CONCRETE BATCH PLANT SUPPORTING OAKBRIDGE PHASE 3, Flower Mound: TXR1570VS, minor, term to 2028-03-04
- COPPELL PLANT, Coppell: TXG110460, minor, term to 2011-11-07
- COPPELL PLANT, Coppell: TXG112874, minor, term to 2021-11-06
Identity
| Facility | TOWN OF FLOWER MOUND WWTP |
|---|---|
| Permittee | FLOWER MOUND, TOWN OF |
| NPDES ID | TX0020711 |
| Status | Administratively continued |
| Type | Individual permit |
| Class | Major |
| Facility type | Publicly owned treatment works |
| Program | Publicly owned treatment works |
| Issued | May 30, 2017 |
| Expires | September 1, 2021 |
| Address | Flower Mound, TX 75028 |
| Receiving water | BAKERS BRANCH, DENTON CREEK |
| Subwatershed | Cottonwood Branch-Denton Creek (HUC 120301040307) |
| Program components on file | POTW, Pretreatment |
| SIC | 4952 – Sewerage Systems |
NPDES TX0020711: effluent limits and exceedances
TOWN OF FLOWER MOUND WWTP (NPDES TX0020711): 54 pollutants on file, 53 limited; 41 with a violation of any kind, 4 with an exceedance.
| Pollutant | Limits | Violations | Exceedances | Latest | Largest, as filed |
|---|---|---|---|---|---|
| Nitrogen, ammonia total [as N] | 3 | 22 | 16 | December 31, 2025 | 86% over the limit |
| Solids, total suspended | 3 | 19 | 13 | April 30, 2026 | 675% over the limit |
| E. coli | 2 | 8 | 8 | December 31, 2025 | 404% over the limit |
| Oxygen, dissolved [DO] | 1 | 5 | 3 | October 31, 2024 | 11% over the limit |
| Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Ceriodaphnia dubia | 4 | 10 | 0 | ||
| Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Pimephales promelas | 4 | 10 | 0 | ||
| NOEC Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia | 4 | 10 | 0 | ||
| NOEC Lethal Static Renewal 7 Day Chronic Pimephales promelas | 4 | 10 | 0 | ||
| NOEC Sub-Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia | 4 | 10 | 0 | ||
| NOEC Sub-Lethal Static Renewal 7 Day Chronic Pimephales promelas | 4 | 10 | 0 | ||
| Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia | 4 | 10 | 0 | ||
| Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Pinephales promelas | 4 | 10 | 0 | ||
| LOEC Lethal Survival Static Renewal 7 Day Chronic Ceriodaphnia dubia | 4 | 10 | 0 | ||
| LOEC Lethal Survival Static Renewal 7 Day Chronic Pimephales promelas | 4 | 10 | 0 | ||
| LOEC Sub-Lethal Reproduction Static Renewal 7 Day Chronic Ceriodaphnia dubia | 4 | 10 | 0 | ||
| LOEC Sub-Lethal Reproduction Static Renewal 7 Day Chronic Pimephales promelas | 4 | 10 | 0 | ||
| Flow, in conduit or thru treatment plant | 4 | 9 | 0 | ||
| pH | 3 | 7 | 0 | ||
| Chromium, sludge, total, dry weight [as Cr] | 5 | 6 | 0 | ||
| BOD, carbonaceous [5 day, 20 C] | 3 | 6 | 0 | ||
| Arsenic, dry weight | 5 | 5 | 0 | ||
| Selenium, dry weight | 3 | 4 | 0 | ||
| Copper, dry weight | 3 | 4 | 0 | ||
| Cadmium, dry weight | 3 | 4 | 0 | ||
| Molybdenum, sludge, total, dry weight [as Mo] | 3 | 4 | 0 | ||
| Zinc, sludge, total, dry weight [as Zn] | 3 | 4 | 0 | ||
| Lead, sludge, total, dry weight [as Pb] | 3 | 4 | 0 | ||
| Nickel, sludge, total, dry weight [as Ni] | 3 | 4 | 0 | ||
| Mercury, sludge, total, dry weight [as Hg] | 3 | 4 | 0 | ||
| Coliform, fecal general | 0 | 4 | 0 | ||
| LC50 Pass/Fail Static 24Hr Acute D. Pulex | 1 | 3 | 0 | ||
| LC50 Pass/Fail Static 24Hr Acute Pimephales promelas | 1 | 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 | ||
| Salmonella | 1 | 2 | 0 | ||
| Fecal coliform | 1 | 1 | 0 | ||
| Unit w/liner/leachate collection system | 1 | 1 | 0 | ||
| Boundary areas | 1 | 1 | 0 | ||
| Pollutant table from 503.13 | 1 | 1 | 0 | ||
| Whole effluent toxicity - retest #1 | 7 | 0 | 0 | ||
| Whole effluent toxicity - retest #2 | 7 | 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 | ||
| Compliance w/part 258 sludge requirement | 1 | 0 | 0 |
NPDES TX0020711: inspections, violations and enforcement
NPDES TX0020711: 2 single-event violations
| Date | What EPA recorded | Agency |
|---|---|---|
| April 3, 2025 | Permit Violations - Violation Specified in Comment | ST6 |
| January 25, 2023 | Permit Violations - Violation Specified in Comment | ST6 |
NPDES TX0020711 (TOWN OF FLOWER MOUND WWTP): no inspection, formal enforcement action and informal enforcement action on file.
Watch NPDES TX0020711
NPDES TX0020711: one email when its EPA record changes — $99/month.
Permits near NPDES TX0020711
NPDES TX0020711: 54 pollutant rows, 2 dated events; ICIS-NPDES download, loaded October 14, 2026.