Clean Water Act discharge permit · NPDES TX0135704
HARRIS COUNTY MUD 536, Katy, TX: NPDES TX0135704 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MinorDischarger class
- 38Pollutants under a numeric limit
- 5Pollutants with an effluent exceedance
- 0Inspections on file
- 0Formal enforcement actions
HARRIS COUNTY MUD 536, held by HARRIS COUNTY MUNICIPAL UTILITY DISTRICT 536, holds NPDES permit TX0135704, which discharges to Hcfcd Ditch;S Mayde Creek;Buffalo Bayou. EPA’s file records it issued January 14, 2020 and expiring January 14, 2025.
Identity
| Facility as filed | HARRIS COUNTY MUD 536 |
|---|---|
| Permittee as filed | HARRIS COUNTY MUNICIPAL UTILITY DISTRICT 536 |
| NPDES ID | TX0135704 |
| Permit status | Administratively continued (past its expiration date and still in force until reissued) |
| Permit type | Individual permit |
| Discharger class | Minor discharger |
| Facility type | Not a publicly owned treatment works |
| Program | Publicly owned treatment works |
| Issued | January 14, 2020 |
| Expiration date | January 14, 2025 |
| Address | Katy, TX 77493 |
| Receiving water | HCFCD DITCH;S MAYDE CREEK;BUFFALO BAYOU |
Effluent limits and exceedances
- 38Pollutants on file
- 38Under a numeric limit
- 6With 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 | 8 | 8 | January 31, 2023 | 24% over the limit |
| Solids, total suspended | 9 | 4 | 4 | June 30, 2025 | 26% over the limit |
| BOD, carbonaceous [5 day, 20 C] | 9 | 3 | 3 | June 30, 2025 | 24% over the limit |
| Nitrogen, ammonia total [as N] | 9 | 2 | 2 | March 31, 2021 | 231% over the limit |
| E. coli | 4 | 3 | 1 | June 30, 2025 | 68% over the limit |
| Chlorine, total residual | 4 | 4 | 0 | ||
| pH | 5 | 0 | 0 | ||
| Arsenic, dry weight | 5 | 0 | 0 | ||
| Chromium, sludge, total, dry weight [as Cr] | 5 | 0 | 0 | ||
| Selenium, dry weight | 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 | ||
| Nickel, total [as Ni] | 2 | 0 | 0 | ||
| Level of pathogen requirements achieved | 2 | 0 | 0 | ||
| Description of pathogen option used | 2 | 0 | 0 | ||
| Vector attraction reduction alternative used | 2 | 0 | 0 | ||
| Oxygen, dissolved [DO] | 1 | 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 | ||
| Unit w/liner/leachate collection system | 1 | 0 | 0 | ||
| Compliance w/part 258 sludge requirement | 1 | 0 | 0 | ||
| Boundary areas | 1 | 0 | 0 | ||
| Salmonella | 1 | 0 | 0 | ||
| Pollutant table from 503.13 | 1 | 0 | 0 |
Inspections, violations and enforcement
- 2Single-event violations
| Date | What EPA recorded | Agency |
|---|---|---|
| July 6, 2022 | Permit Violations - Violation Specified in Comment | ST6 |
| January 19, 2022 | Permit Violations - Violation Specified in Comment | ST6 |
Inspections
EPA’s inspection file holds no inspection for NPDES TX0135704.
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 TX0135704.
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Figures from EPA’s ICIS-NPDES download, loaded September 15, 2026.