Clean Water Act discharge permit · NPDES TX0063096
CITY OF MOUNT VERNON WWTP, Mount Vernon, TX: NPDES TX0063096 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MinorDischarger class
- 8Pollutants under a numeric limit
- 6Pollutants with an effluent exceedance
CITY OF MOUNT VERNON WWTP, held by MOUNT VERNON,CITY OF, holds NPDES permit TX0063096, which discharges to White Oak Creek. EPA’s file records it issued March 25, 2021 and expiring March 25, 2026. The status and dates are as EPA’s permit file stood when Velarion loaded it (September 14, 2026); EPA’s free Detailed Facility Report on ECHO carries the permit’s current standing.
Identity
| Facility as filed | CITY OF MOUNT VERNON WWTP |
|---|---|
| Permittee as filed | MOUNT VERNON,CITY OF |
| NPDES ID | TX0063096 |
| 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 | March 25, 2021 |
| Expiration date | March 25, 2026 |
| Address | Mount Vernon, TX 75457 |
| Receiving water | White Oak Creek |
| Subwatershed | Bear Pen Creek-White Oak Creek (HUC 111403030201) |
Cited to the EPA ICIS-NPDES permit file (ECHO download).
Effluent limits and exceedances
- 37Pollutants on file
- 8Under a numeric limit
- 37With a violation of any kind
- 6With 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 | 68 | 62 | February 29, 2024 | 487% over the limit |
| Solids, total suspended | 3 | 42 | 36 | February 28, 2025 | 353% over the limit |
| BOD, carbonaceous [5 day, 20 C] | 3 | 13 | 7 | March 31, 2023 | 66% over the limit |
| E. coli | 2 | 13 | 5 | May 31, 2021 | 222% over the limit |
| Flow, in conduit or thru treatment plant | 2 | 8 | 4 | May 31, 2021 | 24% over the limit |
| pH | 2 | 7 | 1 | February 28, 2007 | |
| Arsenic, dry weight | 0 | 10 | 0 | ||
| Chromium, sludge, total, dry weight [as Cr] | 0 | 10 | 0 | ||
| Selenium, dry weight | 0 | 6 | 0 | ||
| Copper, dry weight | 0 | 6 | 0 | ||
| Cadmium, dry weight | 0 | 6 | 0 | ||
| Molybdenum, sludge, total, dry weight [as Mo] | 0 | 6 | 0 | ||
| Zinc, sludge, total, dry weight [as Zn] | 0 | 6 | 0 | ||
| Lead, sludge, total, dry weight [as Pb] | 0 | 6 | 0 | ||
| Nickel, sludge, total, dry weight [as Ni] | 0 | 6 | 0 | ||
| Mercury, sludge, total, dry weight [as Hg] | 0 | 6 | 0 | ||
| Chlorine, total residual | 2 | 4 | 0 | ||
| Nickel, total [as Ni] | 0 | 4 | 0 | ||
| Level of pathogen requirements achieved | 0 | 4 | 0 | ||
| Description of pathogen option used | 0 | 4 | 0 | ||
| Vector attraction reduction alternative used | 0 | 4 | 0 | ||
| Polychlorinated biphenyls [PCBs] | 0 | 3 | 0 | ||
| Toxicity characteristic leaching procedure | 0 | 3 | 0 | ||
| Ann. amt sludge disposed by other method | 0 | 3 | 0 | ||
| Annual amt of sludge incinerated | 0 | 3 | 0 | ||
| Annual sludge production, total | 0 | 3 | 0 | ||
| Annual amount of sludge land applied | 0 | 3 | 0 | ||
| Annual amt. sludge disposed surface unit | 0 | 3 | 0 | ||
| Annual amt sludge disposed in landfill | 0 | 3 | 0 | ||
| Annual amt sludge transported interstate | 0 | 3 | 0 | ||
| Compliance w/part 258 sludge requirement | 0 | 3 | 0 | ||
| Oxygen, dissolved [DO] | 1 | 2 | 0 | ||
| Fecal coliform | 0 | 2 | 0 | ||
| Unit w/liner/leachate collection system | 0 | 2 | 0 | ||
| Boundary areas | 0 | 2 | 0 | ||
| Salmonella | 0 | 2 | 0 | ||
| Pollutant table from 503.13 | 0 | 2 | 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
- 0Single-event violations
EPA’s single-event violation file, as loaded, holds no violation for NPDES TX0063096.
Velarion’s copy of EPA’s ICIS-NPDES files does not include the inspections, formal enforcement actions and informal enforcement actions files, so this page shows none of them. EPA’s free Detailed Facility Report on ECHO lists this permit’s inspections, enforcement actions and penalties.
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
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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 TX0063096 there.
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Figures from EPA’s ICIS-NPDES download, loaded September 14, 2026.