Clean Water Act discharge permit · NPDES TX0117129
HARRIS COUNTY MUD 371 WWTP, Cypress, TX: NPDES TX0117129 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MinorDischarger class
- 38Pollutants under a numeric limit
- 8Pollutants with an effluent exceedance
- 0Inspections on file
- 0Formal enforcement actions
HARRIS COUNTY MUD 371 WWTP, held by HARRIS COUNTY MUD 371, holds NPDES permit TX0117129, which discharges to Cypress Creek. EPA’s file records it issued May 29, 2019 and expiring May 29, 2024.
HARRIS COUNTY MUD 371 WWTP, Cypress, Texas: Individual permit TX0117129, held by HARRIS COUNTY MUD 371; Publicly owned treatment works; Administratively continued (past its expiration date and still in force until reissued); issued May 29, 2019, term to May 29, 2024; discharges to Cypress Creek.
- Solids, total suspended: 3 limits, 69 violations of any kind, 54 effluent exceedances, latest May 31, 2026, largest 687% over the limit.
- Nitrogen, ammonia total [as N]: 3 limits, 31 violations of any kind, 16 effluent exceedances, latest November 30, 2024, largest 763% over the limit.
- BOD, carbonaceous [5 day, 20 C]: 3 limits, 20 violations of any kind, 6 effluent exceedances, latest January 31, 2025, largest 80% over the limit.
- E. coli: 2 limits, 6 violations of any kind, 6 effluent exceedances, latest February 28, 2025, largest 1,110% over the limit.
- pH: 3 limits, 12 violations of any kind, 3 effluent exceedances, latest December 31, 2024.
- Flow, in conduit or thru treatment plant: 2 limits, 9 violations of any kind, 1 effluent exceedance, latest December 31, 2004, largest 10% over the limit.
- Chlorine, total residual: 2 limits, 9 violations of any kind, 1 effluent exceedance, latest July 31, 2011, largest 5% over the limit.
- Oxygen, dissolved [DO]: 2 limits, 5 violations of any kind, 1 effluent exceedance, latest October 31, 2024, largest 28% over the limit.
- Arsenic, dry weight: 5 limits, 5 violations of any kind, 0 effluent exceedances.
- Chromium, sludge, total, dry weight [as Cr]: 5 limits, 5 violations of any kind, 0 effluent exceedances.
- Selenium, dry weight: 3 limits, 3 violations of any kind, 0 effluent exceedances.
- Copper, dry weight: 3 limits, 3 violations of any kind, 0 effluent exceedances.
- Cadmium, dry weight: 3 limits, 3 violations of any kind, 0 effluent exceedances.
- Molybdenum, sludge, total, dry weight [as Mo]: 3 limits, 3 violations of any kind, 0 effluent exceedances.
- Zinc, sludge, total, dry weight [as Zn]: 3 limits, 3 violations of any kind, 0 effluent exceedances.
- Lead, sludge, total, dry weight [as Pb]: 3 limits, 3 violations of any kind, 0 effluent exceedances.
- Nickel, sludge, total, dry weight [as Ni]: 3 limits, 3 violations of any kind, 0 effluent exceedances.
- Mercury, sludge, total, dry weight [as Hg]: 3 limits, 3 violations of any kind, 0 effluent exceedances.
- Nickel, total [as Ni]: 2 limits, 2 violations of any kind, 0 effluent exceedances.
- Level of pathogen requirements achieved: 2 limits, 2 violations of any kind, 0 effluent exceedances.
- Description of pathogen option used: 2 limits, 2 violations of any kind, 0 effluent exceedances.
- Vector attraction reduction alternative used: 2 limits, 2 violations of any kind, 0 effluent exceedances.
- Fecal coliform: 1 limit, 1 violation of any kind, 0 effluent exceedances.
- Polychlorinated biphenyls [PCBs]: 1 limit, 1 violation of any kind, 0 effluent exceedances.
- Toxicity characteristic leaching procedure: 1 limit, 1 violation of any kind, 0 effluent exceedances.
- Ann. amt sludge disposed by other method: 1 limit, 1 violation of any kind, 0 effluent exceedances.
- Annual amt of sludge incinerated: 1 limit, 1 violation of any kind, 0 effluent exceedances.
- Annual sludge production, total: 1 limit, 1 violation of any kind, 0 effluent exceedances.
- Annual amount of sludge land applied: 1 limit, 1 violation of any kind, 0 effluent exceedances.
- Annual amt. sludge disposed surface unit: 1 limit, 1 violation of any kind, 0 effluent exceedances.
- Annual amt sludge disposed in landfill: 1 limit, 1 violation of any kind, 0 effluent exceedances.
- Annual amt sludge transported interstate: 1 limit, 1 violation of any kind, 0 effluent exceedances.
- Unit w/liner/leachate collection system: 1 limit, 1 violation of any kind, 0 effluent exceedances.
- Compliance w/part 258 sludge requirement: 1 limit, 1 violation of any kind, 0 effluent exceedances.
- Boundary areas: 1 limit, 1 violation of any kind, 0 effluent exceedances.
- Salmonella: 1 limit, 1 violation of any kind, 0 effluent exceedances.
- Pollutant table from 503.13: 1 limit, 1 violation of any kind, 0 effluent exceedances.
- Annual whole sludge application rate: 1 limit, 0 violations of any kind, 0 effluent exceedances.
- September 20, 2023: Permit Violations - Violation Specified in Comment (ST6).
Texas holds 1,720 Publicly owned treatment works coverages of this permit type in EPA’s file; 1,090 were issued before TX0117129.
Coverages issued nearest TX0117129
- May 16, 2019: CITY OF HEARNE WWTP 2, Hearne, TX0025879, held by HEARNE, CITY OF
- May 16, 2019: CITY OF GODLEY WWTP, Godley, TX0104558, held by GODLEY, CITY OF
- May 20, 2019: SAN GABRIEL WWTP, Georgetown, TX0022667, held by GEORGETOWN, CITY OF
- May 28, 2019: REID ROAD MUD 1 WWTP, Houston, TX0053325, held by REID ROAD MUNICIPAL UTILITY DISTRICT 1
- May 29, 2019: CITY OF RISING STAR WWTP, Rising Star, TX0075604, held by RISING STAR, CITY OF
- June 3, 2019: CITY OF THREE RIVERS WWTP, Three Rivers, TX0137235, held by THREE RIVERS, CITY OF
- June 4, 2019: CITY OF EVANT WWTP, Evant, TX0055522, held by EVANT, CITY OF
- June 4, 2019: CITY OF VALLEY MILLS WWTP, Valley Mills, TX0075647, held by VALLEY MILLS, CITY OF
- June 5, 2019: WILLOW CREEK WWTP, Parker County, TX0023779, held by MINERAL WELLS, CITY OF
- June 10, 2019: GULF COAST WATER RECLAMATION CENTER WWTP, Port Arthur, TX0117960, held by GROVES, CITY OF
HARRIS COUNTY MUD 371 WWTP among its neighbors
EPA’s permit file holds 78 discharge permits in the Dry Creek-Cypress Creek subwatershed (HUC 120401020104), TX0117129 among them. Its county holds 4,455, 195 of them major permits; TX0117129 is a minor permit.
Other permits in the Dry Creek-Cypress Creek subwatershed (HUC 120401020104)
- 2022 CY-FAIR MULTISITE MASTER PLAN - PACKAGE 3, Cypress: TXR1510QH, minor permit, discharging to CYPRESS CREEK, permit term to March 4, 2028
- 290 GRAND MOB, Cypress: TXR1536RB, minor permit, discharging to LITTLE CYPRESS CREEK, permit term to March 4, 2028
- AE MACHINE WORKS, Cypress: TXRNECC95, minor permit, permit term to August 13, 2026
- AMAZONCOM SERVICES DHT4, Cypress: TXR05FS63, minor permit, permit term to August 13, 2026
- ARNOLD MIDDLE SCHOOL, Cypress: TXR1569UM, minor permit, discharging to CYPRESS CREEK, permit term to March 4, 2028
- BAKER UTILITIES, Cypress: TX0129771, minor permit, discharging to CYPRESS CREEK, permit term to February 1, 2018
- BRIDGELAND CENTRAL - EASTHAVEN BC-2, Cypress: TXR1511WT, minor permit, discharging to CYPRESS CREEK, permit term to March 4, 2028
- BRIDGELAND CENTRAL - EASTHAVEN BC-3, Cypress: TXR1548WN, minor permit, discharging to CYPRESS CREEK, permit term to March 4, 2028
- BRIDGELAND CENTRAL SEC 2, Cypress: TXR1532SK, minor permit, discharging to BRIDGELAND DETENTION PHASE 604, permit term to March 4, 2028
- BRIDGELAND CENTRAL SEC 3, Cypress: TXR1540SK, minor permit, discharging to BRIDGELAND DETENTION PHASE 6B, permit term to March 4, 2028
Identity
| Facility as filed | HARRIS COUNTY MUD 371 WWTP |
|---|---|
| Permittee as filed | HARRIS COUNTY MUD 371 |
| NPDES ID | TX0117129 |
| 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 29, 2019 |
| Expiration date | May 29, 2024 |
| Address | Cypress, TX 77433 |
| Receiving water | Cypress Creek |
| Subwatershed | Dry Creek-Cypress Creek (HUC 120401020104) |
| SIC | 4952 – Sewerage Systems |
Effluent limits and exceedances
- 38Pollutants on file
- 38Under a numeric limit
- 37With a violation of any kind
- 8With 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 |
|---|---|---|---|---|---|
| Solids, total suspended | 3 | 69 | 54 | May 31, 2026 | 687% over the limit |
| Nitrogen, ammonia total [as N] | 3 | 31 | 16 | November 30, 2024 | 763% over the limit |
| BOD, carbonaceous [5 day, 20 C] | 3 | 20 | 6 | January 31, 2025 | 80% over the limit |
| E. coli | 2 | 6 | 6 | February 28, 2025 | 1,110% over the limit |
| pH | 3 | 12 | 3 | December 31, 2024 | |
| Flow, in conduit or thru treatment plant | 2 | 9 | 1 | December 31, 2004 | 10% over the limit |
| Chlorine, total residual | 2 | 9 | 1 | July 31, 2011 | 5% over the limit |
| Oxygen, dissolved [DO] | 2 | 5 | 1 | October 31, 2024 | 28% over the limit |
| Arsenic, dry weight | 5 | 5 | 0 | ||
| Chromium, sludge, total, dry weight [as Cr] | 5 | 5 | 0 | ||
| Selenium, dry weight | 3 | 3 | 0 | ||
| Copper, dry weight | 3 | 3 | 0 | ||
| Cadmium, dry weight | 3 | 3 | 0 | ||
| Molybdenum, sludge, total, dry weight [as Mo] | 3 | 3 | 0 | ||
| Zinc, sludge, total, dry weight [as Zn] | 3 | 3 | 0 | ||
| Lead, sludge, total, dry weight [as Pb] | 3 | 3 | 0 | ||
| Nickel, sludge, total, dry weight [as Ni] | 3 | 3 | 0 | ||
| Mercury, sludge, total, dry weight [as Hg] | 3 | 3 | 0 | ||
| Nickel, total [as Ni] | 2 | 2 | 0 | ||
| Level of pathogen requirements achieved | 2 | 2 | 0 | ||
| Description of pathogen option used | 2 | 2 | 0 | ||
| Vector attraction reduction alternative used | 2 | 2 | 0 | ||
| Fecal coliform | 1 | 1 | 0 | ||
| Polychlorinated biphenyls [PCBs] | 1 | 1 | 0 | ||
| Toxicity characteristic leaching procedure | 1 | 1 | 0 | ||
| Ann. amt sludge disposed by other method | 1 | 1 | 0 | ||
| Annual amt of sludge incinerated | 1 | 1 | 0 | ||
| Annual sludge production, total | 1 | 1 | 0 | ||
| Annual amount of sludge land applied | 1 | 1 | 0 | ||
| Annual amt. sludge disposed surface unit | 1 | 1 | 0 | ||
| Annual amt sludge disposed in landfill | 1 | 1 | 0 | ||
| Annual amt sludge transported interstate | 1 | 1 | 0 | ||
| Unit w/liner/leachate collection system | 1 | 1 | 0 | ||
| Compliance w/part 258 sludge requirement | 1 | 1 | 0 | ||
| Boundary areas | 1 | 1 | 0 | ||
| Salmonella | 1 | 1 | 0 | ||
| Pollutant table from 503.13 | 1 | 1 | 0 | ||
| Annual whole sludge application rate | 1 | 0 | 0 |
Inspections, violations and enforcement
- 1Single-event violations
| Date | What EPA recorded | Agency |
|---|---|---|
| September 20, 2023 | Permit Violations - Violation Specified in Comment | ST6 |
Inspections
EPA’s inspection file holds no inspection for NPDES TX0117129.
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 TX0117129.
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Figures from EPA’s ICIS-NPDES download, loaded October 14, 2026.