NPDES TX0021512 · Clean Water Act
WEST MEMORIAL MUD WWTP, Houston, TX: NPDES TX0021512 discharge permit, effluent exceedances, inspections, penalties
WEST MEMORIAL MUD WWTP, Houston, Texas: Individual permit TX0021512, held by WEST MEMORIAL MUD; Publicly owned treatment works; Administratively continued; issued March 15, 2018, term to March 15, 2021; discharges to HCFCD T101-07-00;MASON CREEK; BUFFALO BAYOU.
1 of the 58 pollutants listed for NPDES TX0021512 have no violation or effluent exceedance.
- Nitrogen, ammonia total [as N]: 3 limits, 23 violations of any kind, 20 effluent exceedances, latest March 31, 2025, largest 86% over the limit.
- E. coli: 2 limits, 16 violations of any kind, 14 effluent exceedances, latest October 31, 2024, largest 99,999% over the limit.
- Whole effluent toxicity: 0 limits, 46 violations of any kind, 12 effluent exceedances, latest March 31, 2018, largest 99,999% over the limit.
- Whole Effluent Toxicity [WET] - C. dubia: 6 limits, 12 violations of any kind, 12 effluent exceedances, latest June 30, 2023, largest 99,999% over the limit.
- BOD, carbonaceous [5 day, 20 C]: 3 limits, 10 violations of any kind, 4 effluent exceedances, latest August 31, 2018, largest 36% over the limit.
- Chlorine, total residual: 2 limits, 4 violations of any kind, 2 effluent exceedances, latest May 31, 2018, largest 3,500% over the limit.
- Whole Effluent Toxicity [WET] - P. promelas: 2 limits, 2 violations of any kind, 2 effluent exceedances, latest March 31, 2021, largest 99,999% over the limit.
- Solids, total suspended: 3 limits, 4 violations of any kind, 1 effluent exceedance, latest December 31, 2008, largest 5% over the limit.
- Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Ceriodaphnia dubia: 2 limits, 22 violations of any kind.
- NOEC Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia: 2 limits, 22 violations of any kind.
- NOEC Sub-Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia: 2 limits, 22 violations of any kind.
- Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Pimephales promelas: 2 limits, 20 violations of any kind.
- NOEC Lethal Static Renewal 7 Day Chronic Pimephales promelas: 2 limits, 20 violations of any kind.
- NOEC Sub-Lethal Static Renewal 7 Day Chronic Pimephales promelas: 2 limits, 20 violations of any kind.
- Arsenic, dry weight: 5 limits, 5 violations of any kind.
- Chromium, sludge, total, dry weight [as Cr]: 5 limits, 5 violations of any kind.
- Flow, in conduit or thru treatment plant: 4 limits, 4 violations of any kind.
- pH: 3 limits, 3 violations of any kind.
- Selenium, dry weight: 3 limits, 3 violations of any kind.
- Whole effluent toxicity - retest #1: 3 limits, 3 violations of any kind.
- Whole effluent toxicity - retest #2: 3 limits, 3 violations of any kind.
- Copper, dry weight: 3 limits, 3 violations of any kind.
- Cadmium, dry weight: 3 limits, 3 violations of any kind.
- Solids, total dissolved: 3 limits, 3 violations of any kind.
- Molybdenum, sludge, total, dry weight [as Mo]: 3 limits, 3 violations of any kind.
- Zinc, sludge, total, dry weight [as Zn]: 3 limits, 3 violations of any kind.
- Lead, sludge, total, dry weight [as Pb]: 3 limits, 3 violations of any kind.
- Nickel, sludge, total, dry weight [as Ni]: 3 limits, 3 violations of any kind.
- Mercury, sludge, total, dry weight [as Hg]: 3 limits, 3 violations of any kind.
- LOEC Lethal Survival Static Renewal 7 Day Chronic Pimephales promelas: 2 limits, 3 violations of any kind.
- LOEC Sub-Lethal Reproduction Static Renewal 7 Day Chronic Pimephales promelas: 2 limits, 3 violations of any kind.
- Nickel, total [as Ni]: 2 limits, 2 violations of any kind.
- Level of pathogen requirements achieved: 2 limits, 2 violations of any kind.
- Description of pathogen option used: 2 limits, 2 violations of any kind.
- Vector attraction reduction alternative used: 2 limits, 2 violations of any kind.
- Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia: 2 limits, 2 violations of any kind.
- Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Pinephales promelas: 2 limits, 2 violations of any kind.
- LOEC Lethal Survival Static Renewal 7 Day Chronic Ceriodaphnia dubia: 2 limits, 2 violations of any kind.
- LOEC Sub-Lethal Reproduction Static Renewal 7 Day Chronic Ceriodaphnia dubia: 2 limits, 2 violations of any kind.
- Compliance w/part 258 sludge requirement: 1 limit, 2 violations of any kind.
- LC50 Pass/Fail Static 24Hr Acute D. Pulex: 1 limit, 2 violations of any kind.
- LC50 Pass/Fail Static 24Hr Acute Pimephales promelas: 1 limit, 2 violations of any kind.
- Oxygen, dissolved [DO]: 1 limit, 1 violation of any kind.
- Fecal coliform: 1 limit, 1 violation of any kind.
- Polychlorinated biphenyls [PCBs]: 1 limit, 1 violation of any kind.
- Toxicity characteristic leaching procedure: 1 limit, 1 violation of any kind.
- Ann. amt sludge disposed by other method: 1 limit, 1 violation of any kind.
- Annual amt of sludge incinerated: 1 limit, 1 violation of any kind.
- Annual sludge production, total: 1 limit, 1 violation of any kind.
- Annual amount of sludge land applied: 1 limit, 1 violation of any kind.
- Annual amt. sludge disposed surface unit: 1 limit, 1 violation of any kind.
- Annual amt sludge disposed in landfill: 1 limit, 1 violation of any kind.
- Annual amt sludge transported interstate: 1 limit, 1 violation of any kind.
- Unit w/liner/leachate collection system: 1 limit, 1 violation of any kind.
- Boundary areas: 1 limit, 1 violation of any kind.
- Salmonella: 1 limit, 1 violation of any kind.
- Pollutant table from 503.13: 1 limit, 1 violation of any kind.
- Annual whole sludge application rate: 1 limit.
- November 3, 2026: Phone Call/ EMAIL (State).
- October 13, 2026: Phone Call/ EMAIL (State).
- April 23, 2026: Focused (S).
- October 15, 2025: Permit Violations - Violation Specified in Comment (ST6).
- June 28, 2024: Permit Violations - Violation Specified in Comment (ST6).
Texas holds 1,720 Publicly owned treatment works coverages of this permit type in EPA’s file; 708 were issued before TX0021512.
Coverages issued nearest TX0021512
- 2018-03-14: HARRIS COUNTY FWSD 6 WWTP, Channelview: TX0027111, held by HARRIS COUNTY FWSD
- 2018-03-14: NORTHWEST FREEWAY MUD WWTP, Houston: TX0075183, held by NORTHWEST FREEWAY MUD
- 2018-03-14: ALDINE ISD CHRISMAN RD WTP, Houston: TX0094188, held by ALDINE ISD
- 2018-03-14: HARRIS COUNTY MUD 401 WWTP, Houston: TX0125687, held by HARRIS COUNTY MUD 401
- 2018-03-14: PINE TRACE WWTP, Tomball: TX0127795, held by HARRIS COUNTY MUD 480
- 2018-03-15: HARRIS COUNTY WCID 1 WWTP, Highlands: TX0023311, held by HARRIS COUNTY WCID 1
- 2018-03-15: MEMORIAL HILLS UD WWTP, Houston: TX0046671, held by MEMORIAL HILLS UD
- 2018-03-15: BLAKETREE MUD 1 WWTP, Montgomery: TX0135658, held by BLUEJACK DEVELOPMENT CO LLC
- 2018-03-15: CITY OF SHEPHERD, Shepherd: TX0137596
- 2018-03-15: RIVER RANCH MUD 1 WWTP, Dayton: TX0137901, held by RIVER RANCH HOLDINGS LLC
WEST MEMORIAL MUD WWTP among its neighbors
113 discharge permits are in the Barker Reservoir-Buffalo Bayou subwatershed (HUC 120401040104); TX0021512 is one. Its county: 4,455, 195 major; TX0021512 is major permit.
Other permits in the Barker Reservoir-Buffalo Bayou subwatershed (HUC 120401040104)
- 66 WATERLINE ALONG KINDER MORGAN CORRIDOR, Katy: TXR1542SS, minor, term to 2028-03-04
- ADDICKS RESERVOIR, Houston: TXR1506XW, minor, term to 2028-03-04
- ANDRETTI INDOOR KARTING AND GAMES, Katy: TXR15152X, minor, term to 2023-03-04
- BABACAR DIGNE, Katy: TXRNECG75, minor, term to 2026-08-13
- BECK JUNIOR HIGH ADDITIONS AND RENOVATIONS, Katy: TXR1550XP, minor, term to 2028-03-04
- BING SOUTH APARTMENTS, Katy: TXR1517VA, minor, term to 2028-03-04
- BING SOUTH APARTMENTS, Katy: TXR1535VA, minor, term to 2028-03-04
- CASTLEWOOD MUD WWTP, Houston: TX0071625, major, term to 2022-05-01
- CHASE BANK - KATY MARKETPLACE, Katy: TXR1566SP, minor, term to 2028-03-04
- CIMARRON MUD MS4, Houston: TXR040660, minor, term to 2024-01-23
Identity
| Facility | WEST MEMORIAL MUD WWTP |
|---|---|
| Permittee | WEST MEMORIAL MUD |
| NPDES ID | TX0021512 |
| Status | Administratively continued |
| Type | Individual permit |
| Class | Major |
| Facility type | Publicly owned treatment works |
| Program | Publicly owned treatment works |
| Issued | March 15, 2018 |
| Expires | March 15, 2021 |
| Address | Houston, TX 77491 |
| Receiving water | HCFCD T101-07-00;MASON CREEK; BUFFALO BAYOU |
| Subwatershed | Barker Reservoir-Buffalo Bayou (HUC 120401040104) |
| Program components on file | POTW, Pretreatment |
| SIC | 4952 – Sewerage Systems |
NPDES TX0021512: effluent limits and exceedances
WEST MEMORIAL MUD WWTP (NPDES TX0021512): 58 pollutants on file, 57 limited; 57 with a violation of any kind, 8 with an exceedance.
| Pollutant | Limits | Violations | Exceedances | Latest | Largest, as filed |
|---|---|---|---|---|---|
| Nitrogen, ammonia total [as N] | 3 | 23 | 20 | March 31, 2025 | 86% over the limit |
| E. coli | 2 | 16 | 14 | October 31, 2024 | 99,999% over the limit |
| Whole effluent toxicity | 0 | 46 | 12 | March 31, 2018 | 99,999% over the limit |
| Whole Effluent Toxicity [WET] - C. dubia | 6 | 12 | 12 | June 30, 2023 | 99,999% over the limit |
| BOD, carbonaceous [5 day, 20 C] | 3 | 10 | 4 | August 31, 2018 | 36% over the limit |
| Chlorine, total residual | 2 | 4 | 2 | May 31, 2018 | 3,500% over the limit |
| Whole Effluent Toxicity [WET] - P. promelas | 2 | 2 | 2 | March 31, 2021 | 99,999% over the limit |
| Solids, total suspended | 3 | 4 | 1 | December 31, 2008 | 5% over the limit |
| Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Ceriodaphnia dubia | 2 | 22 | 0 | ||
| NOEC Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia | 2 | 22 | 0 | ||
| NOEC Sub-Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia | 2 | 22 | 0 | ||
| Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Pimephales promelas | 2 | 20 | 0 | ||
| NOEC Lethal Static Renewal 7 Day Chronic Pimephales promelas | 2 | 20 | 0 | ||
| NOEC Sub-Lethal Static Renewal 7 Day Chronic Pimephales promelas | 2 | 20 | 0 | ||
| Arsenic, dry weight | 5 | 5 | 0 | ||
| Chromium, sludge, total, dry weight [as Cr] | 5 | 5 | 0 | ||
| Flow, in conduit or thru treatment plant | 4 | 4 | 0 | ||
| pH | 3 | 3 | 0 | ||
| Selenium, dry weight | 3 | 3 | 0 | ||
| Whole effluent toxicity - retest #1 | 3 | 3 | 0 | ||
| Whole effluent toxicity - retest #2 | 3 | 3 | 0 | ||
| Copper, dry weight | 3 | 3 | 0 | ||
| Cadmium, dry weight | 3 | 3 | 0 | ||
| Solids, total dissolved | 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 | ||
| LOEC Lethal Survival Static Renewal 7 Day Chronic Pimephales promelas | 2 | 3 | 0 | ||
| LOEC Sub-Lethal Reproduction Static Renewal 7 Day Chronic Pimephales promelas | 2 | 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 | ||
| 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 Sub-Lethal Reproduction Static Renewal 7 Day Chronic Ceriodaphnia dubia | 2 | 2 | 0 | ||
| Compliance w/part 258 sludge requirement | 1 | 2 | 0 | ||
| LC50 Pass/Fail Static 24Hr Acute D. Pulex | 1 | 2 | 0 | ||
| LC50 Pass/Fail Static 24Hr Acute Pimephales promelas | 1 | 2 | 0 | ||
| Oxygen, dissolved [DO] | 1 | 1 | 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 | ||
| 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 |
NPDES TX0021512: inspections, violations and enforcement
NPDES TX0021512: 2 single-event violations
| Date | What EPA recorded | Agency |
|---|---|---|
| October 15, 2025 | Permit Violations - Violation Specified in Comment | ST6 |
| June 28, 2024 | Permit Violations - Violation Specified in Comment | ST6 |
NPDES TX0021512: 1 inspection
| Date | What EPA recorded | Agency |
|---|---|---|
| April 23, 2026 | Focused | S |
NPDES TX0021512: 2 informal enforcement actions
| Date | What EPA recorded | Agency |
|---|---|---|
| November 3, 2026 | Phone Call/ EMAIL | State |
| October 13, 2026 | Phone Call/ EMAIL | State |
NPDES TX0021512 (WEST MEMORIAL MUD WWTP): no formal enforcement action on file.
Watch NPDES TX0021512
NPDES TX0021512: one email when its EPA record changes — $99/month.
Permits near NPDES TX0021512
NPDES TX0021512: 58 pollutant rows, 5 dated events; ICIS-NPDES download, loaded October 14, 2026.