Clean Water Act discharge permit · NPDES TX0076660
MAYDE CREEK MUD REGIONAL WWTF, City Of Houston, TX: NPDES TX0076660 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MajorDischarger class
- 24Pollutants under a numeric limit
- 4Pollutants with an effluent exceedance
MAYDE CREEK MUD REGIONAL WWTF, held by MAYDE CREEK MUD, holds NPDES permit TX0076660, which discharges to Buffalo Bayou Above Tidal. EPA’s file records it issued November 18, 2022 and expiring November 18, 2025. 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 | MAYDE CREEK MUD REGIONAL WWTF |
|---|---|
| Permittee as filed | MAYDE CREEK MUD |
| NPDES ID | TX0076660 |
| 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 | November 18, 2022 |
| Expiration date | November 18, 2025 |
| Address | City Of Houston, TX 77449 |
| Receiving water | Buffalo Bayou Above Tidal |
| Subwatershed | South Mayde Creek (HUC 120401040203) |
Cited to the EPA ICIS-NPDES permit file (ECHO download).
Effluent limits and exceedances
- 45Pollutants on file
- 24Under a numeric limit
- 44With 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 |
|---|---|---|---|---|---|
| E. coli | 2 | 10 | 10 | August 31, 2025 | 1,110% over the limit |
| Nitrogen, ammonia total [as N] | 3 | 12 | 6 | May 31, 2024 | 236% over the limit |
| Solids, total suspended | 3 | 8 | 2 | October 31, 2024 | 30% over the limit |
| pH | 2 | 2 | 1 | June 30, 2026 | |
| Silver, total [as Ag] | 0 | 33 | 0 | ||
| LOEC Sub-Lethal Reproduction Static Renewal 7 Day Chronic Ceriodaphnia dubia | 2 | 26 | 0 | ||
| Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia | 2 | 24 | 0 | ||
| LOEC Lethal Survival Static Renewal 7 Day Chronic Ceriodaphnia dubia | 2 | 24 | 0 | ||
| Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Ceriodaphnia dubia | 2 | 20 | 0 | ||
| NOEC Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia | 2 | 20 | 0 | ||
| NOEC Sub-Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia | 2 | 20 | 0 | ||
| LOEC Lethal Survival Static Renewal 7 Day Chronic Pimephales promelas | 2 | 20 | 0 | ||
| LOEC Sub-Lethal Reproduction Static Renewal 7 Day Chronic Pimephales promelas | 2 | 20 | 0 | ||
| Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Pinephales promelas | 2 | 14 | 0 | ||
| BOD, carbonaceous [5 day, 20 C] | 3 | 12 | 0 | ||
| Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Pimephales promelas | 2 | 12 | 0 | ||
| NOEC Lethal Static Renewal 7 Day Chronic Pimephales promelas | 2 | 12 | 0 | ||
| NOEC Sub-Lethal Static Renewal 7 Day Chronic Pimephales promelas | 2 | 12 | 0 | ||
| Arsenic, dry weight | 0 | 5 | 0 | ||
| Chromium, sludge, total, dry weight [as Cr] | 0 | 5 | 0 | ||
| Flow, in conduit or thru treatment plant | 4 | 4 | 0 | ||
| Whole effluent toxicity - retest #1 | 3 | 4 | 0 | ||
| LC50 Pass/Fail Static 24Hr Acute D. Pulex | 1 | 4 | 0 | ||
| LC50 Pass/Fail Static 24Hr Acute Pimephales promelas | 1 | 4 | 0 | ||
| Selenium, dry weight | 0 | 3 | 0 | ||
| Copper, dry weight | 0 | 3 | 0 | ||
| Cadmium, dry weight | 0 | 3 | 0 | ||
| Molybdenum, sludge, total, dry weight [as Mo] | 0 | 3 | 0 | ||
| Zinc, sludge, total, dry weight [as Zn] | 0 | 3 | 0 | ||
| Lead, sludge, total, dry weight [as Pb] | 0 | 3 | 0 | ||
| Nickel, sludge, total, dry weight [as Ni] | 0 | 3 | 0 | ||
| Mercury, sludge, total, dry weight [as Hg] | 0 | 3 | 0 | ||
| Whole effluent toxicity - retest #2 | 3 | 2 | 0 | ||
| Nickel, total [as Ni] | 0 | 2 | 0 | ||
| Level of pathogen requirements achieved | 0 | 2 | 0 | ||
| Description of pathogen option used | 0 | 2 | 0 | ||
| Vector attraction reduction alternative used | 0 | 2 | 0 | ||
| Chlorine, total residual | 2 | 1 | 0 | ||
| Fecal coliform | 0 | 1 | 0 | ||
| Annual whole sludge application rate | 0 | 1 | 0 | ||
| Unit w/liner/leachate collection system | 0 | 1 | 0 | ||
| Boundary areas | 0 | 1 | 0 | ||
| Salmonella | 0 | 1 | 0 | ||
| Pollutant table from 503.13 | 0 | 1 | 0 | ||
| Oxygen, dissolved [DO] | 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
- 1Single-event violations
| Date | What EPA recorded | Agency |
|---|---|---|
| January 23, 2026 | 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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Figures from EPA’s ICIS-NPDES download, loaded September 14, 2026.