Clean Water Act discharge permit · NPDES TX0100161
HARRIS COUNTY MUD 155 WWTP, Houston, TX: NPDES TX0100161 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MajorDischarger class
- 26Pollutants under a numeric limit
- 8Pollutants with an effluent exceedance
HARRIS COUNTY MUD 155 WWTP, held by HARRIS COUNTY MUD 155, holds NPDES permit TX0100161, which discharges to Horsepen Creek, Langham Ck, Bear Ck; So Mayde Ck. EPA’s file records it issued March 8, 2021 and expiring March 8, 2024. The status and dates are as EPA’s permit file stood when Velarion loaded it (September 15, 2026); EPA’s free Detailed Facility Report on ECHO carries the permit’s current standing.
Identity
| Facility as filed | HARRIS COUNTY MUD 155 WWTP |
|---|---|
| Permittee as filed | HARRIS COUNTY MUD 155 |
| NPDES ID | TX0100161 |
| Permit status | Administratively continued (past its expiration date and still in force until reissued) |
| Permit type | Individual permit |
| Discharger class | Major discharger |
| Facility type | Publicly owned treatment works |
| Program | Publicly owned treatment works |
| Issued | March 8, 2021 |
| Expiration date | March 8, 2024 |
| Address | Houston, TX 77095 |
| Receiving water | HORSEPEN CREEK, LANGHAM CK, BEAR CK; SO MAYDE CK |
| Subwatershed | Langham Creek (HUC 120401040201) |
Cited to the EPA ICIS-NPDES permit file (ECHO download).
Effluent limits and exceedances
- 55Pollutants on file
- 26Under a numeric limit
- 51With 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 |
|---|---|---|---|---|---|
| Nitrogen, ammonia total [as N] | 3 | 37 | 19 | June 30, 2016 | 263% over the limit |
| Copper, total [as Cu] | 3 | 27 | 9 | July 31, 2009 | 228% over the limit |
| Whole Effluent Toxicity [WET] - C. dubia | 2 | 8 | 6 | March 31, 2024 | 99,999% over the limit |
| E. coli | 2 | 9 | 5 | August 31, 2025 | 83% over the limit |
| pH | 2 | 16 | 3 | May 31, 2011 | |
| BOD, carbonaceous [5 day, 20 C] | 3 | 20 | 2 | November 30, 2023 | 10% over the limit |
| Flow, in conduit or thru treatment plant | 4 | 19 | 1 | July 31, 2010 | 6% over the limit |
| Chlorine, total residual | 2 | 13 | 1 | September 30, 2018 | 0% over the limit |
| Solids, total suspended | 3 | 18 | 0 | ||
| Oxygen, dissolved [DO] | 1 | 6 | 0 | ||
| Arsenic, dry weight | 0 | 5 | 0 | ||
| Chromium, sludge, total, dry weight [as Cr] | 0 | 5 | 0 | ||
| Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Ceriodaphnia dubia | 2 | 4 | 0 | ||
| Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Pimephales promelas | 2 | 4 | 0 | ||
| NOEC Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia | 2 | 4 | 0 | ||
| NOEC Lethal Static Renewal 7 Day Chronic Pimephales promelas | 2 | 4 | 0 | ||
| NOEC Sub-Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia | 2 | 4 | 0 | ||
| NOEC Sub-Lethal Static Renewal 7 Day Chronic Pimephales promelas | 2 | 4 | 0 | ||
| Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia | 2 | 4 | 0 | ||
| Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Pinephales promelas | 2 | 4 | 0 | ||
| LOEC Lethal Survival Static Renewal 7 Day Chronic Ceriodaphnia dubia | 2 | 4 | 0 | ||
| LOEC Lethal Survival Static Renewal 7 Day Chronic Pimephales promelas | 2 | 4 | 0 | ||
| LOEC Sub-Lethal Reproduction Static Renewal 7 Day Chronic Ceriodaphnia dubia | 2 | 4 | 0 | ||
| LOEC Sub-Lethal Reproduction Static Renewal 7 Day Chronic Pimephales promelas | 2 | 4 | 0 | ||
| Selenium, dry weight | 0 | 3 | 0 | ||
| Copper, dry weight | 0 | 3 | 0 | ||
| Cadmium, dry weight | 0 | 3 | 0 | ||
| Molybdenum, sludge, total, dry weight [as Mo] | 0 | 3 | 0 | ||
| Zinc, sludge, total, dry weight [as Zn] | 0 | 3 | 0 | ||
| Lead, sludge, total, dry weight [as Pb] | 0 | 3 | 0 | ||
| Nickel, sludge, total, dry weight [as Ni] | 0 | 3 | 0 | ||
| Mercury, sludge, total, dry weight [as Hg] | 0 | 3 | 0 | ||
| Nickel, total [as Ni] | 0 | 2 | 0 | ||
| Level of pathogen requirements achieved | 0 | 2 | 0 | ||
| Description of pathogen option used | 0 | 2 | 0 | ||
| Vector attraction reduction alternative used | 0 | 2 | 0 | ||
| Fecal coliform | 0 | 1 | 0 | ||
| Polychlorinated biphenyls [PCBs] | 0 | 1 | 0 | ||
| Toxicity characteristic leaching procedure | 0 | 1 | 0 | ||
| Ann. amt sludge disposed by other method | 0 | 1 | 0 | ||
| Annual amt of sludge incinerated | 0 | 1 | 0 | ||
| Annual sludge production, total | 0 | 1 | 0 | ||
| Annual amount of sludge land applied | 0 | 1 | 0 | ||
| Annual amt. sludge disposed surface unit | 0 | 1 | 0 | ||
| Annual amt sludge disposed in landfill | 0 | 1 | 0 | ||
| Annual amt sludge transported interstate | 0 | 1 | 0 | ||
| Unit w/liner/leachate collection system | 0 | 1 | 0 | ||
| Compliance w/part 258 sludge requirement | 0 | 1 | 0 | ||
| Boundary areas | 0 | 1 | 0 | ||
| Salmonella | 0 | 1 | 0 | ||
| Pollutant table from 503.13 | 0 | 1 | 0 | ||
| Whole effluent toxicity - retest #1 | 3 | 0 | 0 | ||
| Whole effluent toxicity - retest #2 | 3 | 0 | 0 | ||
| LC50 Pass/Fail Static 24Hr Acute D. Pulex | 1 | 0 | 0 | ||
| LC50 Pass/Fail Static 24Hr Acute Pimephales promelas | 1 | 0 | 0 |
Cited to the EPA ICIS-NPDES limits and effluent violations files (ECHO download); up to 60 rows shown, most exceedances first.
Inspections, violations and enforcement
- 1Single-event violations
| Date | What EPA recorded | Agency |
|---|---|---|
| February 22, 2017 | Permit Violations - Violation Specified in Comment | ST6 |
Velarion’s copy of EPA’s ICIS-NPDES files does not include the inspections, formal enforcement actions and informal enforcement actions files, so this page shows none of them. EPA’s free Detailed Facility Report on ECHO lists this permit’s inspections, enforcement actions and penalties.
Cited to the EPA ICIS-NPDES violation, inspection and enforcement files (ECHO download); up to 50 rows of each shown, newest first.
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Figures from EPA’s ICIS-NPDES download, loaded September 15, 2026.