Clean Water Act discharge permit · NPDES TX0138002
HARRIS COUNTY MUD 495 WWTP 2, Katy, TX: NPDES TX0138002 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MinorDischarger class
- 38Pollutants under a numeric limit
- 2Pollutants with an effluent exceedance
- 0Inspections on file
- 0Formal enforcement actions
HARRIS COUNTY MUD 495 WWTP 2, held by HARRIS COUNTY MUD 495, holds NPDES permit TX0138002, which discharges to Detention Pond;Harris Co Mud 495 Drainage Canal; S. EPA’s file records it issued May 9, 2018 and expiring May 9, 2023.
HARRIS COUNTY MUD 495 WWTP 2, Katy, Texas: Individual permit TX0138002, held by HARRIS COUNTY MUD 495; Publicly owned treatment works; Administratively continued (past its expiration date and still in force until reissued); issued May 9, 2018, term to May 9, 2023; discharges to DETENTION POND;HARRIS CO MUD 495 DRAINAGE CANAL; S.
- Nitrogen, ammonia total [as N]: 6 limits, 3 violations of any kind, 3 effluent exceedances, latest July 31, 2026, largest 22% over the limit.
- Solids, total suspended: 6 limits, 1 violation of any kind, 1 effluent exceedance, latest February 28, 2023, largest 12% over the limit.
- BOD, carbonaceous [5 day, 20 C]: 6 limits, 0 violations of any kind, 0 effluent exceedances.
- Arsenic, dry weight: 5 limits, 0 violations of any kind, 0 effluent exceedances.
- Chromium, sludge, total, dry weight [as Cr]: 5 limits, 0 violations of any kind, 0 effluent exceedances.
- Flow, in conduit or thru treatment plant: 4 limits, 0 violations of any kind, 0 effluent exceedances.
- pH: 3 limits, 0 violations of any kind, 0 effluent exceedances.
- Selenium, dry weight: 3 limits, 0 violations of any kind, 0 effluent exceedances.
- Copper, dry weight: 3 limits, 0 violations of any kind, 0 effluent exceedances.
- Cadmium, dry weight: 3 limits, 0 violations of any kind, 0 effluent exceedances.
- Molybdenum, sludge, total, dry weight [as Mo]: 3 limits, 0 violations of any kind, 0 effluent exceedances.
- Zinc, sludge, total, dry weight [as Zn]: 3 limits, 0 violations of any kind, 0 effluent exceedances.
- Lead, sludge, total, dry weight [as Pb]: 3 limits, 0 violations of any kind, 0 effluent exceedances.
- Nickel, sludge, total, dry weight [as Ni]: 3 limits, 0 violations of any kind, 0 effluent exceedances.
- Mercury, sludge, total, dry weight [as Hg]: 3 limits, 0 violations of any kind, 0 effluent exceedances.
- Nickel, total [as Ni]: 2 limits, 0 violations of any kind, 0 effluent exceedances.
- Chlorine, total residual: 2 limits, 0 violations of any kind, 0 effluent exceedances.
- E. coli: 2 limits, 0 violations of any kind, 0 effluent exceedances.
- Level of pathogen requirements achieved: 2 limits, 0 violations of any kind, 0 effluent exceedances.
- Description of pathogen option used: 2 limits, 0 violations of any kind, 0 effluent exceedances.
- Vector attraction reduction alternative used: 2 limits, 0 violations of any kind, 0 effluent exceedances.
- Oxygen, dissolved [DO]: 1 limit, 0 violations of any kind, 0 effluent exceedances.
- Fecal coliform: 1 limit, 0 violations of any kind, 0 effluent exceedances.
- Polychlorinated biphenyls [PCBs]: 1 limit, 0 violations of any kind, 0 effluent exceedances.
- Toxicity characteristic leaching procedure: 1 limit, 0 violations of any kind, 0 effluent exceedances.
- Annual whole sludge application rate: 1 limit, 0 violations of any kind, 0 effluent exceedances.
- Ann. amt sludge disposed by other method: 1 limit, 0 violations of any kind, 0 effluent exceedances.
- Annual amt of sludge incinerated: 1 limit, 0 violations of any kind, 0 effluent exceedances.
- Annual sludge production, total: 1 limit, 0 violations of any kind, 0 effluent exceedances.
- Annual amount of sludge land applied: 1 limit, 0 violations of any kind, 0 effluent exceedances.
- Annual amt. sludge disposed surface unit: 1 limit, 0 violations of any kind, 0 effluent exceedances.
- Annual amt sludge disposed in landfill: 1 limit, 0 violations of any kind, 0 effluent exceedances.
- Annual amt sludge transported interstate: 1 limit, 0 violations of any kind, 0 effluent exceedances.
- Unit w/liner/leachate collection system: 1 limit, 0 violations of any kind, 0 effluent exceedances.
- Compliance w/part 258 sludge requirement: 1 limit, 0 violations of any kind, 0 effluent exceedances.
- Boundary areas: 1 limit, 0 violations of any kind, 0 effluent exceedances.
- Salmonella: 1 limit, 0 violations of any kind, 0 effluent exceedances.
- Pollutant table from 503.13: 1 limit, 0 violations of any kind, 0 effluent exceedances.
Texas holds 1,720 Publicly owned treatment works coverages of this permit type in EPA’s file; 766 were issued before TX0138002. HARRIS COUNTY MUD 495 holds 2 permits in Texas.
Other permits held by HARRIS COUNTY MUD 495
- HARRIS COUNTY MUNICIPAL UTILITY DISTRICT NO 495 WWTP, Harris County: TX0135143, issued January 3, 2019
Coverages issued nearest TX0138002
- May 9, 2018: HARRIS COUNTY MUD 58 WWTP, Houston, TX0074322, held by HARRIS COUNTY MUD 58
- May 9, 2018: CLOVER CREEK MUD WWTP, Magnolia Division, TX0097969, held by CLOVERCREEK MUD
- May 9, 2018: FAIRFIELD VILLAGE REGIONAL WWTP, Cypress, TX0105376, held by HARRIS COUNTY MUD 358
- May 9, 2018: NORTHWEST HARRIS COUNTY MUD 19 WWTP 2, Houston, TX0126152, held by NORTHWEST HARRIS COUNTY MUD 19
- May 9, 2018: MONTGOMERY COUNT MUD 137 WWTP, Magnolia, TX0134856, held by MONTGOMERY COUNTY MUD 137
- May 14, 2018: KLEINWOOD JOINT POWERS BOARD WWTP, Harris County, TX0046817, held by KLEINWOOD JOINT POWERS BOARD
- May 14, 2018: HARRIS COUNTY MUD 82 WWTP, Houston, TX0071528, held by HARRIS COUNTY MUD 82
- May 14, 2018: NORTHWEST HARRIS COUNTY MUD 19 WWTP, Houston, TX0081264, held by NORTHWEST HARRIS COUNTY MUD 19
- May 14, 2018: ANNE LOUISE EDUCATIONAL COMPLEX, Houston, TX0115797, held by ALDINE ISD
- May 16, 2018: HARRIS COUNTY MUD 24 WWTP, Houston, TX0076856, held by HARRIS COUNTY MUD NO 24
HARRIS COUNTY MUD 495 WWTP 2 among its neighbors
EPA’s permit file holds 116 discharge permits in the South Mayde Creek subwatershed (HUC 120401040203), TX0138002 among them. Its county holds 4,455, 195 of them major permits; TX0138002 is a minor permit.
Other permits in the South Mayde Creek subwatershed (HUC 120401040203)
- ACCUMULATORS, Houston: TXRNEBZ28, minor permit, permit term to August 13, 2026
- ADDICKS UD WWTP, Houston: TX0112585, minor permit, discharging to HCFCDD U101-20-00, SOUTH MAYDE CREE, permit term to April 1, 2022
- ANNISTON, Katy: TXR1523SC, minor permit, discharging to BEAR CREEK 1014A, permit term to March 4, 2028
- ANNISTON, Katy: TXR1530VA, minor permit, discharging to BEAR CREEK 1014A, permit term to March 4, 2028
- ANNISTON, Katy: TXR1545WM, minor permit, discharging to BEAR CREEK 1014A, permit term to March 4, 2028
- ANNISTON, Houston: TXR1556TK, minor permit, discharging to BEAR CREEK 1014A, permit term to March 4, 2028
- ANNISTON, Houston: TXR1563PV, minor permit, discharging to BEAR CREEK 1014A, permit term to March 4, 2028
- ANNISTON, Houston: TXR1564PV, minor permit, discharging to BEAR CREEK 1014A, permit term to March 4, 2028
- ANNISTON, Houston: TXR1566SE, minor permit, discharging to BEAR CREEK 1014A, permit term to March 4, 2028
- ANNISTON, Houston: TXR1582MB, minor permit, discharging to BEAR CREEK 1014A, permit term to March 4, 2028
Identity
| Facility as filed | HARRIS COUNTY MUD 495 WWTP 2 |
|---|---|
| Permittee as filed | HARRIS COUNTY MUD 495 |
| NPDES ID | TX0138002 |
| 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 | May 9, 2018 |
| Expiration date | May 9, 2023 |
| Address | Katy, TX 77493 |
| Receiving water | DETENTION POND;HARRIS CO MUD 495 DRAINAGE CANAL; S |
| Subwatershed | South Mayde Creek (HUC 120401040203) |
Effluent limits and exceedances
- 38Pollutants on file
- 38Under a numeric limit
- 2With a violation of any kind
- 2With 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] | 6 | 3 | 3 | July 31, 2026 | 22% over the limit |
| Solids, total suspended | 6 | 1 | 1 | February 28, 2023 | 12% over the limit |
| BOD, carbonaceous [5 day, 20 C] | 6 | 0 | 0 | ||
| Arsenic, dry weight | 5 | 0 | 0 | ||
| Chromium, sludge, total, dry weight [as Cr] | 5 | 0 | 0 | ||
| Flow, in conduit or thru treatment plant | 4 | 0 | 0 | ||
| pH | 3 | 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 | ||
| Chlorine, total residual | 2 | 0 | 0 | ||
| E. coli | 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
- 0Single-event violations
EPA’s single-event violation file, as loaded, holds no violation for NPDES TX0138002.
Inspections
EPA’s inspection file holds no inspection for NPDES TX0138002.
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 TX0138002.
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Figures from EPA’s ICIS-NPDES download, loaded September 15, 2026.