Clean Water Act discharge permit · NPDES TX0128163
BRAZORIA COUNTY MUD NO 40 WWTP, Brazoria County, TX: NPDES TX0128163 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MinorDischarger class
- 38Pollutants under a numeric limit
- 4Pollutants with an effluent exceedance
- 0Inspections on file
- 1Formal enforcement actions
BRAZORIA COUNTY MUD NO 40 WWTP, held by BRAZORIA COUNTY MUD 40, holds NPDES permit TX0128163, which discharges to Mustang Bayou;Persimmon Bayou;New Bayou;Chocolate. EPA’s file records it issued January 2, 2019 and expiring January 2, 2024.
BRAZORIA COUNTY MUD NO 40 WWTP, Brazoria County, Texas: Individual permit TX0128163, held by BRAZORIA COUNTY MUD 40; Publicly owned treatment works; Administratively continued (past its expiration date and still in force until reissued); issued January 2, 2019, term to January 2, 2024; discharges to MUSTANG BAYOU;PERSIMMON BAYOU;NEW BAYOU;CHOCOLATE.
- Solids, total suspended: 9 limits, 37 violations of any kind, 7 effluent exceedances, latest January 31, 2026, largest 97% over the limit.
- Nitrogen, ammonia total [as N]: 9 limits, 34 violations of any kind, 4 effluent exceedances, latest July 31, 2026, largest 73% over the limit.
- E. coli: 2 limits, 23 violations of any kind, 3 effluent exceedances, latest December 31, 2025, largest 507% over the limit.
- Chlorine, total residual: 2 limits, 21 violations of any kind, 1 effluent exceedance, latest September 30, 2024, largest 20% over the limit.
- BOD, carbonaceous [5 day, 20 C]: 9 limits, 30 violations of any kind, 0 effluent exceedances.
- pH: 3 limits, 21 violations of any kind, 0 effluent exceedances.
- Flow, in conduit or thru treatment plant: 6 limits, 20 violations of any kind, 0 effluent exceedances.
- Oxygen, dissolved [DO]: 1 limit, 10 violations of any kind, 0 effluent exceedances.
- 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.
- Annual whole sludge application rate: 1 limit, 0 violations of any kind, 0 effluent exceedances.
- June 16, 2026: CWA 309A AO For Compliance (EPA).
- February 25, 2026: Under Review (State).
- January 20, 2026: Agency Enforcement Review (State).
Texas holds 1,720 Publicly owned treatment works coverages of this permit type in EPA’s file; 968 were issued before TX0128163.
Coverages issued nearest TX0128163
- December 21, 2018: NW HARRIS COUNTY MUD 9 WWTP, Harris County, TX0075221, held by NORTHWEST HARRIS COUNTY MUD 9
- January 2, 2019: GORMAN WWTP, Eastland County, TX0021806, held by GORMAN, CITY OF
- January 2, 2019: CROSBY MUD WWTP, Crosby, TX0054151, held by CROSBY MUD
- January 2, 2019: NORTH PARK PUD WWTP, Houston, TX0072567, held by NORTH PARK PUD
- January 2, 2019: ARROWHEAD RANCH ESTATES WWTP, Clay County, TX0101818, held by RED RIVER AUTHORITY OF TEXAS
- January 3, 2019: NEWPORT MUD WWTP, Crosby, TX0023230, held by NEWPORT MUD
- January 3, 2019: CITY OF TEAGUE WEST WWTP, Teague, TX0034509, held by TEAGUE, CITY OF
- January 3, 2019: PALMER PLANTATION MUD REGIONAL WWTP, Missouri City, TX0090484, held by PALMER PLANTATION MUD 2
- January 3, 2019: HARRIS COUNTY MUNICIPAL UTILITY DISTRICT NO 495 WWTP, Harris County, TX0135143, held by HARRIS COUNTY MUD 495
- January 9, 2019: CENTRAL WWTP, Webster, TX0024589, held by WEBSTER, CITY OF
BRAZORIA COUNTY MUD NO 40 WWTP among its neighbors
EPA’s permit file holds 288 discharge permits in the Mustang Bayou subwatershed (HUC 120402040400), TX0128163 among them. Its county holds 522, 24 of them major permits; TX0128163 is a minor permit.
Other permits in the Mustang Bayou subwatershed (HUC 120402040400)
- 2006 MUSTANG CREEK DEVELOPMENT WWTP, Manvel: TXR1519OF, minor permit, discharging to MUSTANG BAYOU, permit term to March 4, 2028
- AAA STORAGE FM 521, Rosharon: TXR1522TW, minor permit, discharging to WEST FORK CHOCOLATE BAYOU, permit term to March 4, 2028
- AGUA ESTATES SUBDIVISION, Houston: TXR1585OK, minor permit, discharging to SIMS BAYOU, permit term to March 4, 2028
- ALAMO CONCRETE PRODUCTS, Iowa Colony: TXG113212, minor permit, permit term to November 6, 2026
- ALLDAY AUTO PARTS, Houston: TXR05GF67, minor permit, permit term to August 13, 2026
- ALLIED PETROCHEMICAL TEXAS, Alvin: TXR05FY24, minor permit, permit term to August 13, 2026
- ALVIN 1460 AC TRACT WWTP, Alvin: TX0147141, not classed
- ALVIN 350 WWTP, Alvin: TX0147761, minor permit, discharging to Chocolate Bayou Above Tidal, permit term to May 4, 2031
- ALVIN CHEMICAL, Alvin: TXRNECK50, minor permit, permit term to August 13, 2026
- ALVIN HIGH SCHOOL EXPANSION & RENOVATIONS, Alvin: TXR1554YD, minor permit, discharging to NEW BAYOU, permit term to March 4, 2028
Identity
| Facility as filed | BRAZORIA COUNTY MUD NO 40 WWTP |
|---|---|
| Permittee as filed | BRAZORIA COUNTY MUD 40 |
| NPDES ID | TX0128163 |
| Permit status | Administratively continued (past its expiration date and still in force until reissued) |
| Permit type | Individual permit |
| Discharger class | Minor discharger |
| Facility type | Not a publicly owned treatment works |
| Program | Publicly owned treatment works |
| Issued | January 2, 2019 |
| Expiration date | January 2, 2024 |
| Address | Brazoria County, TX 77578 |
| Receiving water | MUSTANG BAYOU;PERSIMMON BAYOU;NEW BAYOU;CHOCOLATE |
| Receiving water impaired | 303(D) Listed |
| Subwatershed | Mustang Bayou (HUC 120402040400) |
| SIC | 4952 – Sewerage Systems |
Effluent limits and exceedances
- 38Pollutants on file
- 38Under a numeric limit
- 37With 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 |
|---|---|---|---|---|---|
| Solids, total suspended | 9 | 37 | 7 | January 31, 2026 | 97% over the limit |
| Nitrogen, ammonia total [as N] | 9 | 34 | 4 | July 31, 2026 | 73% over the limit |
| E. coli | 2 | 23 | 3 | December 31, 2025 | 507% over the limit |
| Chlorine, total residual | 2 | 21 | 1 | September 30, 2024 | 20% over the limit |
| BOD, carbonaceous [5 day, 20 C] | 9 | 30 | 0 | ||
| pH | 3 | 21 | 0 | ||
| Flow, in conduit or thru treatment plant | 6 | 20 | 0 | ||
| Oxygen, dissolved [DO] | 1 | 10 | 0 | ||
| 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 | ||
| Annual whole sludge application rate | 1 | 0 | 0 |
Inspections, violations and enforcement
- 0Single-event violations
EPA’s single-event violation file, as loaded, holds no violation for NPDES TX0128163.
Inspections
EPA’s inspection file holds no inspection for NPDES TX0128163.
Formal enforcement and penalties
1 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.
| Date | What EPA recorded | Agency | Federal penalty | State or local penalty |
|---|---|---|---|---|
| June 16, 2026 | CWA 309A AO For Compliance | EPA |
Informal enforcement
| Date | What EPA recorded | Agency |
|---|---|---|
| February 25, 2026 | Under Review | State |
| January 20, 2026 | Agency Enforcement Review | State |
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Figures from EPA’s ICIS-NPDES download, loaded October 14, 2026.