Clean Water Act discharge permit · NPDES TX0047449
MCALLEN SOUTH WWTP, Mcallen, TX: NPDES TX0047449 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MajorDischarger class
- 23Pollutants under a numeric limit
- 3Pollutants with an effluent exceedance
MCALLEN SOUTH WWTP, held by MCALLEN, CITY OF, holds NPDES permit TX0047449, which discharges to Arroyo Colorado Above Tidal. EPA’s file records it issued September 3, 2020 and expiring September 3, 2025. The status and dates are as EPA’s permit file stood when Velarion loaded it (September 15, 2026); EPA’s free Detailed Facility Report on ECHO carries the permit’s current standing.
Identity
| Facility as filed | MCALLEN SOUTH WWTP |
|---|---|
| Permittee as filed | MCALLEN, CITY OF |
| NPDES ID | TX0047449 |
| 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 | September 3, 2020 |
| Expiration date | September 3, 2025 |
| Address | Mcallen, TX 78503 |
| Receiving water | Arroyo Colorado Above Tidal |
| Receiving water impaired | 303(D) Listed |
| Subwatershed | Llano Grande Lake-Arroyo Colorado (HUC 121102080100) |
Cited to the EPA ICIS-NPDES permit file (ECHO download).
Effluent limits and exceedances
- 31Pollutants on file
- 23Under a numeric limit
- 29With a violation of any kind
- 3With 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 |
|---|---|---|---|---|---|
| E. coli | 2 | 13 | 11 | June 30, 2026 | 507% over the limit |
| Nitrogen, ammonia total [as N] | 3 | 17 | 8 | September 30, 2022 | 105% over the limit |
| Mercury, total [as Hg] | 0 | 10 | 1 | October 31, 2005 | 3,900% over the limit |
| Flow, in conduit or thru treatment plant | 4 | 10 | 0 | ||
| Solids, total suspended | 3 | 6 | 0 | ||
| BOD, carbonaceous [5 day, 20 C] | 3 | 6 | 0 | ||
| pH | 2 | 4 | 0 | ||
| LC50 Pass/Fail Static 24Hr Acute D. Pulex | 1 | 4 | 0 | ||
| LC50 Pass/Fail Static 24Hr Acute Pimephales promelas | 1 | 4 | 0 | ||
| Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Ceriodaphnia dubia | 2 | 3 | 0 | ||
| NOEC Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia | 2 | 3 | 0 | ||
| NOEC Sub-Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia | 2 | 3 | 0 | ||
| Selenium, total [as Se] | 0 | 3 | 0 | ||
| Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Pimephales promelas | 2 | 2 | 0 | ||
| NOEC Lethal Static Renewal 7 Day Chronic Pimephales promelas | 2 | 2 | 0 | ||
| NOEC Sub-Lethal Static Renewal 7 Day Chronic Pimephales promelas | 2 | 2 | 0 | ||
| Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia | 2 | 2 | 0 | ||
| Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Pinephales promelas | 2 | 2 | 0 | ||
| LOEC Lethal Survival Static Renewal 7 Day Chronic Ceriodaphnia dubia | 2 | 2 | 0 | ||
| LOEC Lethal Survival Static Renewal 7 Day Chronic Pimephales promelas | 2 | 2 | 0 | ||
| LOEC Sub-Lethal Reproduction Static Renewal 7 Day Chronic Ceriodaphnia dubia | 2 | 2 | 0 | ||
| LOEC Sub-Lethal Reproduction Static Renewal 7 Day Chronic Pimephales promelas | 2 | 2 | 0 | ||
| Oxygen, dissolved [DO] | 1 | 2 | 0 | ||
| Chlorine, total residual | 0 | 2 | 0 | ||
| Polychlorinated biphenyls [PCBs] | 0 | 1 | 0 | ||
| Toxicity characteristic leaching procedure | 0 | 1 | 0 | ||
| Annual amt of sludge incinerated | 0 | 1 | 0 | ||
| Annual amount of sludge land applied | 0 | 1 | 0 | ||
| Annual amt. sludge disposed surface unit | 0 | 1 | 0 | ||
| Whole effluent toxicity - retest #1 | 3 | 0 | 0 | ||
| Whole effluent toxicity - retest #2 | 3 | 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
- 1Single-event violations
| Date | What EPA recorded | Agency |
|---|---|---|
| June 6, 2018 | Permit Violations - Violation Specified in Comment | ST6 |
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.
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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 TX0047449 there.
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Figures from EPA’s ICIS-NPDES download, loaded September 15, 2026.