Clean Water Act discharge permit · NPDES TX0113000
SEBASTIAN MUD WWTP, Cameron County, TX: NPDES TX0113000 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MinorDischarger class
- 38Pollutants under a numeric limit
- 7Pollutants with an effluent exceedance
- 0Inspections on file
- 0Formal enforcement actions
SEBASTIAN MUD WWTP, held by SEBASTIAN MUD, holds NPDES permit TX0113000, which discharges to North Floodway Pilot Channel. EPA’s file records it issued November 10, 2015 and expiring July 1, 2020.
SEBASTIAN MUD WWTP, Cameron County, Texas: Individual permit TX0113000, held by SEBASTIAN MUD; Publicly owned treatment works; Administratively continued (past its expiration date and still in force until reissued); issued November 10, 2015, term to July 1, 2020; discharges to NORTH FLOODWAY PILOT CHANNEL.
- Nitrogen, ammonia total [as N]: 3 limits, 91 violations of any kind, 64 effluent exceedances, latest August 31, 2025, largest 900% over the limit.
- Solids, total suspended: 3 limits, 68 violations of any kind, 44 effluent exceedances, latest June 30, 2025, largest 200% over the limit.
- BOD, carbonaceous [5 day, 20 C]: 3 limits, 29 violations of any kind, 5 effluent exceedances, latest March 31, 2022, largest 217% over the limit.
- E. coli: 2 limits, 8 violations of any kind, 2 effluent exceedances, latest October 31, 2010, largest 225% over the limit.
- pH: 3 limits, 20 violations of any kind, 1 effluent exceedance, latest September 30, 2011.
- Flow, in conduit or thru treatment plant: 2 limits, 17 violations of any kind, 1 effluent exceedance, latest September 30, 2012, largest 118% over the limit.
- Chlorine, total residual: 2 limits, 17 violations of any kind, 1 effluent exceedance, latest December 31, 2003, largest 900% over the limit.
- Arsenic, dry weight: 5 limits, 15 violations of any kind, 0 effluent exceedances.
- Chromium, sludge, total, dry weight [as Cr]: 5 limits, 15 violations of any kind, 0 effluent exceedances.
- Selenium, dry weight: 3 limits, 9 violations of any kind, 0 effluent exceedances.
- Copper, dry weight: 3 limits, 9 violations of any kind, 0 effluent exceedances.
- Cadmium, dry weight: 3 limits, 9 violations of any kind, 0 effluent exceedances.
- Molybdenum, sludge, total, dry weight [as Mo]: 3 limits, 9 violations of any kind, 0 effluent exceedances.
- Zinc, sludge, total, dry weight [as Zn]: 3 limits, 9 violations of any kind, 0 effluent exceedances.
- Lead, sludge, total, dry weight [as Pb]: 3 limits, 9 violations of any kind, 0 effluent exceedances.
- Nickel, sludge, total, dry weight [as Ni]: 3 limits, 9 violations of any kind, 0 effluent exceedances.
- Mercury, sludge, total, dry weight [as Hg]: 3 limits, 9 violations of any kind, 0 effluent exceedances.
- Oxygen, dissolved [DO]: 1 limit, 8 violations of any kind, 0 effluent exceedances.
- Nickel, total [as Ni]: 2 limits, 6 violations of any kind, 0 effluent exceedances.
- Level of pathogen requirements achieved: 2 limits, 6 violations of any kind, 0 effluent exceedances.
- Description of pathogen option used: 2 limits, 6 violations of any kind, 0 effluent exceedances.
- Vector attraction reduction alternative used: 2 limits, 6 violations of any kind, 0 effluent exceedances.
- Polychlorinated biphenyls [PCBs]: 1 limit, 6 violations of any kind, 0 effluent exceedances.
- Toxicity characteristic leaching procedure: 1 limit, 5 violations of any kind, 0 effluent exceedances.
- Ann. amt sludge disposed by other method: 1 limit, 4 violations of any kind, 0 effluent exceedances.
- Annual amt of sludge incinerated: 1 limit, 4 violations of any kind, 0 effluent exceedances.
- Annual sludge production, total: 1 limit, 4 violations of any kind, 0 effluent exceedances.
- Annual amount of sludge land applied: 1 limit, 4 violations of any kind, 0 effluent exceedances.
- Annual amt. sludge disposed surface unit: 1 limit, 4 violations of any kind, 0 effluent exceedances.
- Annual amt sludge disposed in landfill: 1 limit, 4 violations of any kind, 0 effluent exceedances.
- Annual amt sludge transported interstate: 1 limit, 4 violations of any kind, 0 effluent exceedances.
- Fecal coliform: 1 limit, 3 violations of any kind, 0 effluent exceedances.
- Unit w/liner/leachate collection system: 1 limit, 3 violations of any kind, 0 effluent exceedances.
- Compliance w/part 258 sludge requirement: 1 limit, 3 violations of any kind, 0 effluent exceedances.
- Boundary areas: 1 limit, 3 violations of any kind, 0 effluent exceedances.
- Salmonella: 1 limit, 3 violations of any kind, 0 effluent exceedances.
- Pollutant table from 503.13: 1 limit, 3 violations of any kind, 0 effluent exceedances.
- Annual whole sludge application rate: 1 limit, 0 violations of any kind, 0 effluent exceedances.
- June 11, 2026: Under Review (State).
- February 18, 2026: Letter of Violation/ Warning Letter (State).
- August 1, 2023: Permit Violations - Violation Specified in Comment (ST6).
- May 2, 2022: Permit Violations - Violation Specified in Comment (ST6).
- June 20, 2019: Permit Violations - Violation Specified in Comment (ST6).
- August 2, 2018: Permit Violations - Violation Specified in Comment (ST6).
- May 31, 2017: Permit Violations - Violation Specified in Comment (ST6).
Texas holds 1,720 Publicly owned treatment works coverages of this permit type in EPA’s file; 190 were issued before TX0113000.
Coverages issued nearest TX0113000
- October 20, 2015: BENAVIDES SEWER TREATMENT PLANT, Benavides, TX0127205, held by DUVAL COUNTY CONSERVATION & RECLAMATION DISTRICT
- November 2, 2015: CITY OF PEARSALL WWTP, Pearsall, TX0032719, held by PEARSALL, CITY OF
- November 6, 2015: CITY OF EDINBURG WWTP, Edinburg, TX0024112, held by EDINBURG, CITY OF
- November 10, 2015: GALVESTON COUNTY WCID 8 WWTP, Galveston County, TX0023671, held by GALVESTON COUNTY WATER AND IMPROVEMENT DISTTICT 8
- November 10, 2015: CITY OF ALICE NORTHEAST WWTP, Alice, TX0091219, held by ALICE, CITY OF
- November 19, 2015: PADRE ISLAND NATIONAL SEASHORE WWTF, Kleberg County, TX0122572, held by U.S. DEPARTMENT OF THE INTERIOR
- November 23, 2015: SOUTH REGIONAL WATER RECLAMATION PLANT, City Of Schertz, TX0136131, held by CIBOLO CREEK MUNICIPAL AUTHORITY
- December 2, 2015: SIENNA REGIONAL WWTP, Missouri City, TX0127876, held by SIENNA PLANTATION MUD NO 1
- December 3, 2015: CITY OF KINGSVILLE 3.0 MGD WWTP, Kingsville, TX0023418, held by KINGSVILLE, CITY OF
- December 3, 2015: CITY OF KINGSVILLE 1 MGD WWTF, Kingsville, TX0117978, held by KINGSVILLE, CITY OF
SEBASTIAN MUD WWTP among its neighbors
EPA’s permit file holds 192 discharge permits in the Upper Pilot Channel-Laguna Madre subwatershed (HUC 121102080300), TX0113000 among them. Its county holds 327, 11 of them major permits; TX0113000 is a minor permit.
Other permits in the Upper Pilot Channel-Laguna Madre subwatershed (HUC 121102080300)
- 107 SH RD FROM FM 495 TO FM 1924, Mission: TXR1594XM, minor permit, discharging to LAGUNA MADRE VIA DRAINAGE DITCHES, permit term to March 4, 2028
- 1423 FM ROAD SOUTH FROM BUS 83, Donna: TXR1572WS, minor permit, discharging to LAGUNA MADRE VIA DRAINAGE DITCHES, permit term to March 4, 2028
- 2021-2022 WESLACO WATER & SEWER IMPROVEMENTS, Weslaco: TXR1586OH, minor permit, discharging to NUECES-RIO GRANDE COASTAL BASIN, permit term to March 4, 2028
- ACME SQUARE SUBDIVISION, Pharr: TXR1587RM, minor permit, discharging to DRAINAGE DITCHES FLOWING INTO LOWER LAGUNA MADRE, permit term to March 4, 2028
- ALAMO CONCRETE PRODUCTS PLANT 87, Donna: TXG110936, minor permit, discharging to RIO GRANDE RIVER, permit term to November 7, 2021
- ALAMO RGV PARTS DBA DISCOUNT USED AUTO PARTS, Alamo: TXR05FX48, minor permit, permit term to August 13, 2026
- ALHAMBRA ON 10TH SUBDIVISION, Mcallen: TXR1519YB, minor permit, discharging to LAGUNA MADRE, permit term to March 4, 2028
- ALI ESTATES, Edinburg: TXR1507VT, minor permit, discharging to PRIVATE DETENTION POND, permit term to March 4, 2028
- ANDARA APARTMENTS ON WARE RD, Mcallen: TXR1590LZ, minor permit, discharging to FIRE HYDRANT, permit term to March 4, 2028
- B & L METALS RECYCLING, Edinburg: TXR05FM98, minor permit, permit term to August 13, 2026
Identity
| Facility as filed | SEBASTIAN MUD WWTP |
|---|---|
| Permittee as filed | SEBASTIAN MUD |
| NPDES ID | TX0113000 |
| Permit status | Administratively continued (past its expiration date and still in force until reissued) |
| Permit type | Individual permit |
| Discharger class | Minor discharger |
| Facility type | Publicly owned treatment works |
| Program | Publicly owned treatment works |
| Issued | November 10, 2015 |
| Expiration date | July 1, 2020 |
| Address | Cameron County, TX 78550 |
| Receiving water | NORTH FLOODWAY PILOT CHANNEL |
| Subwatershed | Upper Pilot Channel-Laguna Madre (HUC 121102080300) |
| SIC | 4952 – Sewerage Systems |
Effluent limits and exceedances
- 38Pollutants on file
- 38Under a numeric limit
- 37With a violation of any kind
- 7With 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 |
|---|---|---|---|---|---|
| Nitrogen, ammonia total [as N] | 3 | 91 | 64 | August 31, 2025 | 900% over the limit |
| Solids, total suspended | 3 | 68 | 44 | June 30, 2025 | 200% over the limit |
| BOD, carbonaceous [5 day, 20 C] | 3 | 29 | 5 | March 31, 2022 | 217% over the limit |
| E. coli | 2 | 8 | 2 | October 31, 2010 | 225% over the limit |
| pH | 3 | 20 | 1 | September 30, 2011 | |
| Flow, in conduit or thru treatment plant | 2 | 17 | 1 | September 30, 2012 | 118% over the limit |
| Chlorine, total residual | 2 | 17 | 1 | December 31, 2003 | 900% over the limit |
| Arsenic, dry weight | 5 | 15 | 0 | ||
| Chromium, sludge, total, dry weight [as Cr] | 5 | 15 | 0 | ||
| Selenium, dry weight | 3 | 9 | 0 | ||
| Copper, dry weight | 3 | 9 | 0 | ||
| Cadmium, dry weight | 3 | 9 | 0 | ||
| Molybdenum, sludge, total, dry weight [as Mo] | 3 | 9 | 0 | ||
| Zinc, sludge, total, dry weight [as Zn] | 3 | 9 | 0 | ||
| Lead, sludge, total, dry weight [as Pb] | 3 | 9 | 0 | ||
| Nickel, sludge, total, dry weight [as Ni] | 3 | 9 | 0 | ||
| Mercury, sludge, total, dry weight [as Hg] | 3 | 9 | 0 | ||
| Oxygen, dissolved [DO] | 1 | 8 | 0 | ||
| Nickel, total [as Ni] | 2 | 6 | 0 | ||
| Level of pathogen requirements achieved | 2 | 6 | 0 | ||
| Description of pathogen option used | 2 | 6 | 0 | ||
| Vector attraction reduction alternative used | 2 | 6 | 0 | ||
| Polychlorinated biphenyls [PCBs] | 1 | 6 | 0 | ||
| Toxicity characteristic leaching procedure | 1 | 5 | 0 | ||
| Ann. amt sludge disposed by other method | 1 | 4 | 0 | ||
| Annual amt of sludge incinerated | 1 | 4 | 0 | ||
| Annual sludge production, total | 1 | 4 | 0 | ||
| Annual amount of sludge land applied | 1 | 4 | 0 | ||
| Annual amt. sludge disposed surface unit | 1 | 4 | 0 | ||
| Annual amt sludge disposed in landfill | 1 | 4 | 0 | ||
| Annual amt sludge transported interstate | 1 | 4 | 0 | ||
| Fecal coliform | 1 | 3 | 0 | ||
| Unit w/liner/leachate collection system | 1 | 3 | 0 | ||
| Compliance w/part 258 sludge requirement | 1 | 3 | 0 | ||
| Boundary areas | 1 | 3 | 0 | ||
| Salmonella | 1 | 3 | 0 | ||
| Pollutant table from 503.13 | 1 | 3 | 0 | ||
| Annual whole sludge application rate | 1 | 0 | 0 |
Inspections, violations and enforcement
- 5Single-event violations
| Date | What EPA recorded | Agency |
|---|---|---|
| August 1, 2023 | Permit Violations - Violation Specified in Comment | ST6 |
| May 2, 2022 | Permit Violations - Violation Specified in Comment | ST6 |
| June 20, 2019 | Permit Violations - Violation Specified in Comment | ST6 |
| August 2, 2018 | Permit Violations - Violation Specified in Comment | ST6 |
| May 31, 2017 | Permit Violations - Violation Specified in Comment | ST6 |
Inspections
EPA’s inspection file holds no inspection for NPDES TX0113000.
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
| Date | What EPA recorded | Agency |
|---|---|---|
| June 11, 2026 | Under Review | State |
| February 18, 2026 | Letter of Violation/ Warning Letter | State |
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Figures from EPA’s ICIS-NPDES download, loaded October 14, 2026.