NPDES TX0133001 · Clean Water Act
D& L MHP WWTP, Harris County, TX: NPDES TX0133001 discharge permit, effluent exceedances, inspections, penalties
D& L MHP WWTP, Harris County, Texas: Individual permit TX0133001, held by HARTZOG JR WILLIAM EMMETT; Effective; issued April 17, 2019, term to April 17, 2024; discharges to HALLS BAYOU; HOUSTON SHIP CHANNEL.
20 of the 38 pollutants listed for NPDES TX0133001 have no violation or effluent exceedance.
- Solids, total suspended: 3 limits, 34 violations of any kind, 7 effluent exceedances, latest February 28, 2026, largest 137% over the limit.
- Nitrogen, ammonia total [as N]: 6 limits, 30 violations of any kind, 3 effluent exceedances, latest December 31, 2025, largest 77% over the limit.
- E. coli: 2 limits, 19 violations of any kind, 3 effluent exceedances, latest April 30, 2021, largest 3,741% over the limit.
- pH: 3 limits, 20 violations of any kind, 2 effluent exceedances, latest March 31, 2026.
- Flow, in conduit or thru treatment plant: 2 limits, 19 violations of any kind, 1 effluent exceedance, latest August 31, 2017, largest 6% over the limit.
- Oxygen, dissolved [DO]: 1 limit, 10 violations of any kind, 1 effluent exceedance, latest November 30, 2025, largest 43% over the limit.
- BOD, carbonaceous [5 day, 20 C]: 3 limits, 27 violations of any kind.
- Chlorine, total residual: 2 limits, 18 violations of any kind.
- Annual amt sludge disposed in landfill: 1 limit, 2 violations of any kind.
- Annual amt sludge transported interstate: 1 limit, 2 violations 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.
- Compliance w/part 258 sludge requirement: 1 limit, 1 violation of any kind.
- Arsenic, dry weight: 5 limits.
- Chromium, sludge, total, dry weight [as Cr]: 5 limits.
- Selenium, dry weight: 3 limits.
- Copper, dry weight: 3 limits.
- Cadmium, dry weight: 3 limits.
- Molybdenum, sludge, total, dry weight [as Mo]: 3 limits.
- Zinc, sludge, total, dry weight [as Zn]: 3 limits.
- Lead, sludge, total, dry weight [as Pb]: 3 limits.
- Nickel, sludge, total, dry weight [as Ni]: 3 limits.
- Mercury, sludge, total, dry weight [as Hg]: 3 limits.
- Nickel, total [as Ni]: 2 limits.
- Level of pathogen requirements achieved: 2 limits.
- Description of pathogen option used: 2 limits.
- Vector attraction reduction alternative used: 2 limits.
- Fecal coliform: 1 limit.
- Annual whole sludge application rate: 1 limit.
- Unit w/liner/leachate collection system: 1 limit.
- Boundary areas: 1 limit.
- Salmonella: 1 limit.
- Pollutant table from 503.13: 1 limit.
- October 7, 2025: Permit Violations - Violation Specified in Comment (ST6).
D& L MHP WWTP among its neighbors
288 discharge permits are in the Mustang Bayou subwatershed (HUC 120402040400); TX0133001 is one. Its county: 4,455, 195 major; TX0133001 is minor permit.
Other permits in the Mustang Bayou subwatershed (HUC 120402040400)
- 2006 MUSTANG CREEK DEVELOPMENT WWTP, Manvel: TXR1519OF, minor, term to 2028-03-04
- AAA STORAGE FM 521, Rosharon: TXR1522TW, minor, term to 2028-03-04
- AGUA ESTATES SUBDIVISION, Houston: TXR1585OK, minor, term to 2028-03-04
- ALAMO CONCRETE PRODUCTS, Iowa Colony: TXG113212, minor, term to 2026-11-06
- ALLDAY AUTO PARTS, Houston: TXR05GF67, minor, term to 2026-08-13
- ALLIED PETROCHEMICAL TEXAS, Alvin: TXR05FY24, minor, term to 2026-08-13
- ALVIN 1460 AC TRACT WWTP, Alvin: TX0147141
- ALVIN 350 WWTP, Alvin: TX0147761, minor, term to 2031-05-04
- ALVIN CHEMICAL, Alvin: TXRNECK50, minor, term to 2026-08-13
- ALVIN HIGH SCHOOL EXPANSION & RENOVATIONS, Alvin: TXR1554YD, minor, term to 2028-03-04
Identity
| Facility | D& L MHP WWTP |
|---|---|
| Permittee | HARTZOG JR WILLIAM EMMETT |
| NPDES ID | TX0133001 |
| Status | Effective |
| Type | Individual permit |
| Class | Minor |
| Facility type | Non-POTW |
| Issued | April 17, 2019 |
| Expires | April 17, 2024 |
| Address | Harris County, TX 77037 |
| Receiving water | HALLS BAYOU; HOUSTON SHIP CHANNEL |
| Subwatershed | Mustang Bayou (HUC 120402040400) |
NPDES TX0133001: effluent limits and exceedances
D& L MHP WWTP (NPDES TX0133001): 38 pollutants on file, 38 limited; 18 with a violation of any kind, 6 with an exceedance.
| Pollutant | Limits | Violations | Exceedances | Latest | Largest, as filed |
|---|---|---|---|---|---|
| Solids, total suspended | 3 | 34 | 7 | February 28, 2026 | 137% over the limit |
| Nitrogen, ammonia total [as N] | 6 | 30 | 3 | December 31, 2025 | 77% over the limit |
| E. coli | 2 | 19 | 3 | April 30, 2021 | 3,741% over the limit |
| pH | 3 | 20 | 2 | March 31, 2026 | |
| Flow, in conduit or thru treatment plant | 2 | 19 | 1 | August 31, 2017 | 6% over the limit |
| Oxygen, dissolved [DO] | 1 | 10 | 1 | November 30, 2025 | 43% over the limit |
| BOD, carbonaceous [5 day, 20 C] | 3 | 27 | 0 | ||
| Chlorine, total residual | 2 | 18 | 0 | ||
| Annual amt sludge disposed in landfill | 1 | 2 | 0 | ||
| Annual amt sludge transported interstate | 1 | 2 | 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 | ||
| Compliance w/part 258 sludge requirement | 1 | 1 | 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 | ||
| Fecal coliform | 1 | 0 | 0 | ||
| Annual whole sludge application rate | 1 | 0 | 0 | ||
| Unit w/liner/leachate collection system | 1 | 0 | 0 | ||
| Boundary areas | 1 | 0 | 0 | ||
| Salmonella | 1 | 0 | 0 | ||
| Pollutant table from 503.13 | 1 | 0 | 0 |
NPDES TX0133001: inspections, violations and enforcement
NPDES TX0133001: 1 single-event violation
| Date | What EPA recorded | Agency |
|---|---|---|
| October 7, 2025 | Permit Violations - Violation Specified in Comment | ST6 |
NPDES TX0133001 (D& L MHP WWTP): no inspection, formal enforcement action and informal enforcement action on file.
Watch NPDES TX0133001
NPDES TX0133001: one email when its EPA record changes — $99/month.
Permits near NPDES TX0133001
NPDES TX0133001: 38 pollutant rows, 1 dated events; ICIS-NPDES download, loaded September 15, 2026.