Clean Water Act discharge permit · NPDES TX0084042
PORTER MUD WWTP, Porter, TX: NPDES TX0084042 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MajorDischarger class
- 55Pollutants under a numeric limit
- 5Pollutants with an effluent exceedance
- 1Inspections on file
- 0Formal enforcement actions
PORTER MUD WWTP, held by PORTER MUD, holds NPDES permit TX0084042, which discharges to Lake Houston. EPA’s file records it issued August 26, 2019 and expiring August 26, 2024. The status and dates are as EPA’s permit file stood when Velarion loaded it (October 14, 2026); EPA’s free Detailed Facility Report on ECHO carries the permit’s current standing.
Identity
| Facility as filed | PORTER MUD WWTP |
|---|---|
| Permittee as filed | PORTER MUD |
| NPDES ID | TX0084042 |
| 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 | August 26, 2019 |
| Expiration date | August 26, 2024 |
| Address | Porter, TX 77365 |
| Receiving water | Lake Houston |
| Subwatershed | Bens Branch-Frontal Lake Houston (HUC 120401010501) |
| SIC | 4952 – Sewerage Systems |
Cited to the EPA ICIS-NPDES permit file (ECHO download) and EPA’s NAICS/SIC and component files, the same download.
Effluent limits and exceedances
- 55Pollutants on file
- 55Under a numeric limit
- 19With 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.
| Pollutant or measure | Limits | Violations, any kind | Effluent exceedances | Latest exceedance | Largest exceedance, as filed |
|---|---|---|---|---|---|
| Flow, in conduit or thru treatment plant | 6 | 72 | 63 | April 30, 2024 | 56% over the limit |
| BOD, carbonaceous [5 day, 20 C] | 6 | 19 | 16 | January 31, 2024 | 101% over the limit |
| Nitrogen, ammonia total [as N] | 6 | 19 | 13 | July 31, 2022 | 186% over the limit |
| E. coli | 2 | 11 | 11 | February 28, 2025 | 1,113% over the limit |
| Solids, total suspended | 6 | 7 | 1 | September 30, 2023 | 31% over the limit |
| Zinc, total [as Zn] | 3 | 15 | 0 | ||
| Chlorine, total residual | 2 | 6 | 0 | ||
| pH | 3 | 5 | 0 | ||
| LC50 Pass/Fail Static 24Hr Acute D. Pulex | 1 | 3 | 0 | ||
| LC50 Pass/Fail Static 24Hr Acute Pimephales promelas | 1 | 3 | 0 | ||
| Arsenic, dry weight | 5 | 2 | 0 | ||
| Chromium, sludge, total, dry weight [as Cr] | 5 | 2 | 0 | ||
| Nickel, total [as Ni] | 2 | 2 | 0 | ||
| Oxygen, dissolved [DO] | 1 | 2 | 0 | ||
| Level of pathogen requirements achieved | 2 | 1 | 0 | ||
| Description of pathogen option used | 2 | 1 | 0 | ||
| Vector attraction reduction alternative used | 2 | 1 | 0 | ||
| Unit w/liner/leachate collection system | 1 | 1 | 0 | ||
| Boundary areas | 1 | 1 | 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 | ||
| Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Ceriodaphnia dubia | 2 | 0 | 0 | ||
| Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Pimephales promelas | 2 | 0 | 0 | ||
| NOEC Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia | 2 | 0 | 0 | ||
| NOEC Lethal Static Renewal 7 Day Chronic Pimephales promelas | 2 | 0 | 0 | ||
| NOEC Sub-Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia | 2 | 0 | 0 | ||
| NOEC Sub-Lethal Static Renewal 7 Day Chronic Pimephales promelas | 2 | 0 | 0 | ||
| Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia | 2 | 0 | 0 | ||
| Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Pinephales promelas | 2 | 0 | 0 | ||
| LOEC Lethal Survival Static Renewal 7 Day Chronic Ceriodaphnia dubia | 2 | 0 | 0 | ||
| LOEC Lethal Survival Static Renewal 7 Day Chronic Pimephales promelas | 2 | 0 | 0 | ||
| LOEC Sub-Lethal Reproduction Static Renewal 7 Day Chronic Ceriodaphnia dubia | 2 | 0 | 0 | ||
| LOEC Sub-Lethal Reproduction Static Renewal 7 Day Chronic Pimephales promelas | 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 | ||
| Compliance w/part 258 sludge requirement | 1 | 0 | 0 | ||
| Salmonella | 1 | 0 | 0 | ||
| Pollutant table from 503.13 | 1 | 0 | 0 |
Cited to the EPA ICIS-NPDES limits and effluent violations files (ECHO download); up to 60 rows shown, most exceedances first.
Inspections, violations and enforcement
- 2Single-event violations
| Date | What EPA recorded | Agency |
|---|---|---|
| September 7, 2023 | Permit Violations - Violation Specified in Comment | ST6 |
| June 17, 2021 | Permit Violations - Violation Specified in Comment | ST6 |
Inspections
| Date | What EPA recorded | Agency |
|---|---|---|
| April 7, 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 TX0084042.
Cited to the EPA ICIS-NPDES violation, inspection and enforcement files (ECHO download); up to 50 rows of each shown, newest first.
Watch this permit
One permit holder, $99/month. Watch the register for one permit holder and the places and receiving waters tied to its permits. Choose “One permit holder” and enter this permit’s NPDES ID, TX0084042.
Start the watch
- One permit holder — $99/month
- One watershed — $2,990/year
- One state — $4,990/year
- The whole register — $18,000/year
How we handle your data → Privacy
EPA publishes a free Detailed Facility Report for every permit on ECHO: its compliance status quarter by quarter, its inspections, and its enforcement actions and penalties. EPA also sends free notices of new inspections and enforcement actions through ECHO Notify; enter NPDES ID TX0084042 there.
PORTER MUD WWTP, Porter, Texas: Individual permit TX0084042, held by PORTER MUD; Publicly owned treatment works; Administratively continued (past its expiration date and still in force until reissued); issued August 26, 2019, term to August 26, 2024; discharges to Lake Houston.
- Flow, in conduit or thru treatment plant: 6 limits, 72 violations of any kind, 63 effluent exceedances, latest April 30, 2024, largest 56% over the limit.
- BOD, carbonaceous [5 day, 20 C]: 6 limits, 19 violations of any kind, 16 effluent exceedances, latest January 31, 2024, largest 101% over the limit.
- Nitrogen, ammonia total [as N]: 6 limits, 19 violations of any kind, 13 effluent exceedances, latest July 31, 2022, largest 186% over the limit.
- E. coli: 2 limits, 11 violations of any kind, 11 effluent exceedances, latest February 28, 2025, largest 1,113% over the limit.
- Solids, total suspended: 6 limits, 7 violations of any kind, 1 effluent exceedance, latest September 30, 2023, largest 31% over the limit.
- Zinc, total [as Zn]: 3 limits, 15 violations of any kind, 0 effluent exceedances.
- Chlorine, total residual: 2 limits, 6 violations of any kind, 0 effluent exceedances.
- pH: 3 limits, 5 violations of any kind, 0 effluent exceedances.
- LC50 Pass/Fail Static 24Hr Acute D. Pulex: 1 limit, 3 violations of any kind, 0 effluent exceedances.
- LC50 Pass/Fail Static 24Hr Acute Pimephales promelas: 1 limit, 3 violations of any kind, 0 effluent exceedances.
- Arsenic, dry weight: 5 limits, 2 violations of any kind, 0 effluent exceedances.
- Chromium, sludge, total, dry weight [as Cr]: 5 limits, 2 violations of any kind, 0 effluent exceedances.
- Nickel, total [as Ni]: 2 limits, 2 violations of any kind, 0 effluent exceedances.
- Oxygen, dissolved [DO]: 1 limit, 2 violations of any kind, 0 effluent exceedances.
- Level of pathogen requirements achieved: 2 limits, 1 violation of any kind, 0 effluent exceedances.
- Description of pathogen option used: 2 limits, 1 violation of any kind, 0 effluent exceedances.
- Vector attraction reduction alternative used: 2 limits, 1 violation of any kind, 0 effluent exceedances.
- Unit w/liner/leachate collection system: 1 limit, 1 violation of any kind, 0 effluent exceedances.
- Boundary areas: 1 limit, 1 violation 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.
- Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Ceriodaphnia dubia: 2 limits, 0 violations of any kind, 0 effluent exceedances.
- Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Pimephales promelas: 2 limits, 0 violations of any kind, 0 effluent exceedances.
- NOEC Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia: 2 limits, 0 violations of any kind, 0 effluent exceedances.
- NOEC Lethal Static Renewal 7 Day Chronic Pimephales promelas: 2 limits, 0 violations of any kind, 0 effluent exceedances.
- NOEC Sub-Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia: 2 limits, 0 violations of any kind, 0 effluent exceedances.
- NOEC Sub-Lethal Static Renewal 7 Day Chronic Pimephales promelas: 2 limits, 0 violations of any kind, 0 effluent exceedances.
- Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia: 2 limits, 0 violations of any kind, 0 effluent exceedances.
- Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Pinephales promelas: 2 limits, 0 violations of any kind, 0 effluent exceedances.
- LOEC Lethal Survival Static Renewal 7 Day Chronic Ceriodaphnia dubia: 2 limits, 0 violations of any kind, 0 effluent exceedances.
- LOEC Lethal Survival Static Renewal 7 Day Chronic Pimephales promelas: 2 limits, 0 violations of any kind, 0 effluent exceedances.
- LOEC Sub-Lethal Reproduction Static Renewal 7 Day Chronic Ceriodaphnia dubia: 2 limits, 0 violations of any kind, 0 effluent exceedances.
- LOEC Sub-Lethal Reproduction Static Renewal 7 Day Chronic Pimephales promelas: 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.
- Compliance w/part 258 sludge requirement: 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.
- April 7, 2026: Evaluation (S).
- September 7, 2023: Permit Violations - Violation Specified in Comment (ST6).
- June 17, 2021: Permit Violations - Violation Specified in Comment (ST6).
Texas holds 1,720 Publicly owned treatment works coverages of this permit type in EPA’s file; 1,177 were issued before TX0084042. PORTER MUD holds 2 permits in Texas.
Other permits held by PORTER MUD
- PORTER MUD MS4, Porter: TXR040937, issued August 24, 2026
Coverages issued nearest TX0084042
- August 15, 2019: HIGH ISLAND ISD WWTP, High Island, TX0134945, held by HIGH ISLAND ISD
- August 20, 2019: GANADO WWTP, Ganado, TX0026026, held by CITY OF GANADO
- August 20, 2019: CITY OF GRANBURY WWTP, Granbury, TX0105210, held by GRANBURY, CITY OF
- August 20, 2019: HARRIS COUNTY LEADERSHIP ACADEMY WWTP, Katy, TX0117421, held by HARRIS COUNTY
- August 20, 2019: PERRIN-WHITT CISD WWTP, Perrin Division, TX0133809, held by PERRIN-WHITT CISD
- August 26, 2019: A∓ M HEEP WWTP, Buda, TX0125288, held by GUADALUPE-BLANCO RIVER AUTHORITY
- August 28, 2019: BAYPORT FACILITY, Pasadena, TX0005380, held by GULF COAST AUTHORITY
- August 28, 2019: CITY OF DE LEON WWTP, De Leon, TX0054844, held by DE LEON, CITY OF
- August 28, 2019: ROBINSON CREEK WWTP, Huntsville, TX0116572, held by HUNTSVILLE, CITY OF
- August 30, 2019: HCMUD 559 WWTP, Houston, TX0138908, held by HARRIS COUNTY MUNICIPAL UTILITY DISTRICT 559
PORTER MUD WWTP among its neighbors
EPA’s permit file holds 83 discharge permits in the Bens Branch-Frontal Lake Houston subwatershed (HUC 120401010501), TX0084042 among them. Its county holds 1,439, 16 of them major permits; TX0084042 is a major permit.
Other permits in the Bens Branch-Frontal Lake Houston subwatershed (HUC 120401010501)
- 421 7TH STREET PROJECT, Humble: TXR1583SD, minor permit, discharging to LAKE HOUSTON, permit term to March 4, 2028
- 50 AC HENDRICKS TRACT, Porter: TXR1504UT, minor permit, discharging to LAKE HOUSTON, permit term to March 4, 2028
- 50 AC HENDRICKS TRACT, Porter: TXR1563QC, minor permit, discharging to 1002, permit term to March 4, 2028
- AUSTIN WOOD RECYCLING - HUMBLE, Humble: TXR05GX99, minor permit, permit term to August 13, 2026
- AZALEA DISTRICT SECTION 7, Porter: TXR1553XO, minor permit, discharging to WHITE OAK CREEK, permit term to March 4, 2028
- AZALEA SECTION 7, Porter: TXR1504XI, minor permit, discharging to WHITE OAK CREEK, permit term to March 4, 2028
- BENS BRANCH TRIBUTARY NO 2 DRAINAGE IMPRVTS, Porter: TXR1561OJ, minor permit, discharging to LAKE HOUSTON, permit term to March 4, 2028
- BENS BRANCH TRIBUTARY NO2, Porter: TXR1529NX, minor permit, discharging to SAN JACINTO WEST FORK, permit term to March 4, 2028
- BEY BUSINESS PARK, Humble: TXR1518UM, minor permit, discharging to GARNERS BAYOU, permit term to March 4, 2028
- BIDDLE OFFICE WAREHOUSE, Porter: TXR1554MZ, minor permit, discharging to WEST FORK SAN JACINTO RIVER, permit term to March 4, 2028
Nearby on the register
- Discharge permits in Porter
- Every permit record in Porter, A to Z
- Discharge permits in Texas
- Every permit record in Texas, A to Z
Figures from EPA’s ICIS-NPDES download, loaded October 14, 2026.