Clean Water Act discharge permit · NPDES TX0085588
CHIMNEY HILL MUD WWTP, Houston, TX: NPDES TX0085588 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MajorDischarger class
- 54Pollutants under a numeric limit
- 6Pollutants with an effluent exceedance
- 0Inspections on file
- 0Formal enforcement actions
CHIMNEY HILL MUD WWTP, held by CHIMNEY HILL MUD, holds NPDES permit TX0085588, which discharges to Hcfcd; Horsepen Ck;Langham Ck;Bear Ck;So Mayde Ck;. EPA’s file records it issued July 6, 2017 and expiring May 1, 2022.
CHIMNEY HILL MUD WWTP, Houston, Texas: Individual permit TX0085588, held by CHIMNEY HILL MUD; Publicly owned treatment works; Administratively continued (past its expiration date and still in force until reissued); issued July 6, 2017, term to May 1, 2022; discharges to HCFCD; HORSEPEN CK;LANGHAM CK;BEAR CK;SO MAYDE CK;.
- E. coli: 2 limits, 16 violations of any kind, 12 effluent exceedances, latest September 30, 2025, largest 99,999% over the limit.
- Nitrogen, ammonia total [as N]: 3 limits, 30 violations of any kind, 6 effluent exceedances, latest January 31, 2025, largest 96% over the limit.
- BOD, carbonaceous [5 day, 20 C]: 3 limits, 35 violations of any kind, 5 effluent exceedances, latest February 28, 2014, largest 49% over the limit.
- Solids, total suspended: 3 limits, 27 violations of any kind, 3 effluent exceedances, latest March 31, 2022, largest 90% over the limit.
- Oxygen, dissolved [DO]: 1 limit, 8 violations of any kind, 3 effluent exceedances, latest July 31, 2010, largest 7% over the limit.
- Chlorine, total residual: 2 limits, 29 violations of any kind, 1 effluent exceedance, latest November 30, 2004, largest 1% over the limit.
- Flow, in conduit or thru treatment plant: 4 limits, 41 violations of any kind, 0 effluent exceedances.
- pH: 3 limits, 15 violations of any kind, 0 effluent exceedances.
- LOEC Sub-Lethal Reproduction Static Renewal 7 Day Chronic Ceriodaphnia dubia: 2 limits, 12 violations of any kind, 0 effluent exceedances.
- LOEC Sub-Lethal Reproduction Static Renewal 7 Day Chronic Pimephales promelas: 2 limits, 12 violations of any kind, 0 effluent exceedances.
- Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Ceriodaphnia dubia: 2 limits, 10 violations of any kind, 0 effluent exceedances.
- Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Pimephales promelas: 2 limits, 10 violations of any kind, 0 effluent exceedances.
- NOEC Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia: 2 limits, 10 violations of any kind, 0 effluent exceedances.
- NOEC Lethal Static Renewal 7 Day Chronic Pimephales promelas: 2 limits, 10 violations of any kind, 0 effluent exceedances.
- NOEC Sub-Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia: 2 limits, 10 violations of any kind, 0 effluent exceedances.
- NOEC Sub-Lethal Static Renewal 7 Day Chronic Pimephales promelas: 2 limits, 10 violations of any kind, 0 effluent exceedances.
- Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia: 2 limits, 10 violations of any kind, 0 effluent exceedances.
- Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Pinephales promelas: 2 limits, 10 violations of any kind, 0 effluent exceedances.
- LOEC Lethal Survival Static Renewal 7 Day Chronic Ceriodaphnia dubia: 2 limits, 10 violations of any kind, 0 effluent exceedances.
- LOEC Lethal Survival Static Renewal 7 Day Chronic Pimephales promelas: 2 limits, 10 violations of any kind, 0 effluent exceedances.
- LC50 Pass/Fail Static 24Hr Acute D. Pulex: 1 limit, 6 violations of any kind, 0 effluent exceedances.
- LC50 Pass/Fail Static 24Hr Acute Pimephales promelas: 1 limit, 6 violations of any kind, 0 effluent exceedances.
- 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.
- Polychlorinated biphenyls [PCBs]: 1 limit, 3 violations of any kind, 0 effluent exceedances.
- Toxicity characteristic leaching procedure: 1 limit, 3 violations of any kind, 0 effluent exceedances.
- Ann. amt sludge disposed by other method: 1 limit, 3 violations of any kind, 0 effluent exceedances.
- Annual amt of sludge incinerated: 1 limit, 3 violations of any kind, 0 effluent exceedances.
- Annual sludge production, total: 1 limit, 3 violations of any kind, 0 effluent exceedances.
- Annual amount of sludge land applied: 1 limit, 3 violations of any kind, 0 effluent exceedances.
- Annual amt. sludge disposed surface unit: 1 limit, 3 violations of any kind, 0 effluent exceedances.
- Annual amt sludge disposed in landfill: 1 limit, 3 violations of any kind, 0 effluent exceedances.
- Annual amt sludge transported interstate: 1 limit, 3 violations of any kind, 0 effluent exceedances.
- Compliance w/part 258 sludge requirement: 1 limit, 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.
- Unit w/liner/leachate collection system: 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.
- Whole effluent toxicity - retest #1: 3 limits, 0 violations of any kind, 0 effluent exceedances.
- Whole effluent toxicity - retest #2: 3 limits, 0 violations of any kind, 0 effluent exceedances.
- Annual whole sludge application rate: 1 limit, 0 violations of any kind, 0 effluent exceedances.
- December 9, 2025: Permit Violations - Violation Specified in Comment (ST6).
- January 31, 2024: Permit Violations - Violation Specified in Comment (ST6).
- July 31, 2018: Permit Violations - Violation Specified in Comment (ST6).
Texas holds 1,720 Publicly owned treatment works coverages of this permit type in EPA’s file; 505 were issued before TX0085588.
Coverages issued nearest TX0085588
- June 29, 2017: CITY OF WINNSBORO WWTP, Winnsboro, TX0054658, held by WINNSBORO, CITY OF
- June 29, 2017: MIMS CREEK WWTP, Fairfield, TX0075850, held by CITY OF FAIRFIELD
- June 29, 2017: HARRIS COUNTY MUD 170 REGIONAL WWTP, Houston, TX0079146, held by HARRIS COUNTY MUD 170
- June 29, 2017: HARRIS COUNTY MUD 119 WWTP, Houston, TX0092908, held by HARRIS COUNTY MUD NO. 119
- June 29, 2017: HARRIS COUNTY MUD 433 WWTP, Cypress, TX0132161, held by HARRIS COUNTY MUD 433
- July 6, 2017: HARRIS COUNTY FWSD 61 WWTP, Houston, TX0091804, held by HARRIS COUNTY FWSD 61
- July 6, 2017: BIG OAKS MUD WWTP, Fort Bend County, TX0096911, held by BIG OAKS MUD
- July 6, 2017: FORT BEND COUNTY MUD 185 WWTP, Katy, TX0128708, held by FORT BEND COUNTY MUD 185
- July 6, 2017: FORT BEND COUNTY MUD 34 WWTP, Fort Bend County, TX0129062, held by FORT BEND COUNTY MUD 34
- July 6, 2017: LLANO WWTP, Llano, TX0135968, held by LLANO, CITY OF
CHIMNEY HILL MUD WWTP among its neighbors
EPA’s permit file holds 79 discharge permits in the Jersey Lake-Whiteoak Bayou subwatershed (HUC 120401040301), TX0085588 among them. Its county holds 4,455, 195 of them major permits; TX0085588 is a major permit.
Other permits in the Jersey Lake-Whiteoak Bayou subwatershed (HUC 120401040301)
- 1960 FLEX WAREHOUSE PHASE 1, Houston: TXR1522YA, minor permit, discharging to WHITE OAK BAYOU ABOVE TIDAL, permit term to March 4, 2028
- 31A WATER LINE FROM GESSNER ROAD TO BENDING BROOK LANE, Houston: TXR1586RP, minor permit, discharging to BRICKHOUSE GULLY/BAYOU, permit term to March 4, 2028
- 7738 WRIGHT ROAD, Houston: TXR1596PQ, minor permit, discharging to WHITE OAK BAYOU, permit term to March 4, 2028
- ABSOLUTE PRECISION MACHINE, Houston: TXRNECF60, minor permit, permit term to August 13, 2026
- ABSOLUTE PRECISION MACHINE, Houston: TXRNECR65, minor permit, permit term to August 13, 2026
- ALLORA FALLBROOK, Houston: TXR1575XB, minor permit, discharging to NA, permit term to March 4, 2028
- ALLOY & STAINLESS FASTENERS, Jersey Village: TXR05CJ51, minor permit, permit term to August 13, 2026
- AMERICAN CRUSHED CONCRETE CHARLES RD CONCRETE CRUSHING PLANT, Jersey Village: TXR05EQ23, minor permit, permit term to August 13, 2026
- ARSHAM METAL RECYCLING, Jersey Village: TXR05FB08, minor permit, permit term to August 13, 2026
- ASPHALT ROADWAY RECONSTRUCTION CYPRESS PLACE 2022, Cypress: TXR1521PC, minor permit, discharging to GREENS BAYOU, permit term to March 4, 2028
Identity
| Facility as filed | CHIMNEY HILL MUD WWTP |
|---|---|
| Permittee as filed | CHIMNEY HILL MUD |
| NPDES ID | TX0085588 |
| 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 | July 6, 2017 |
| Expiration date | May 1, 2022 |
| Address | Houston, TX 77041 |
| Receiving water | HCFCD; HORSEPEN CK;LANGHAM CK;BEAR CK;SO MAYDE CK; |
| Subwatershed | Jersey Lake-Whiteoak Bayou (HUC 120401040301) |
Effluent limits and exceedances
- 54Pollutants on file
- 54Under a numeric limit
- 51With a violation of any kind
- 6With 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 |
|---|---|---|---|---|---|
| E. coli | 2 | 16 | 12 | September 30, 2025 | 99,999% over the limit |
| Nitrogen, ammonia total [as N] | 3 | 30 | 6 | January 31, 2025 | 96% over the limit |
| BOD, carbonaceous [5 day, 20 C] | 3 | 35 | 5 | February 28, 2014 | 49% over the limit |
| Solids, total suspended | 3 | 27 | 3 | March 31, 2022 | 90% over the limit |
| Oxygen, dissolved [DO] | 1 | 8 | 3 | July 31, 2010 | 7% over the limit |
| Chlorine, total residual | 2 | 29 | 1 | November 30, 2004 | 1% over the limit |
| Flow, in conduit or thru treatment plant | 4 | 41 | 0 | ||
| pH | 3 | 15 | 0 | ||
| LOEC Sub-Lethal Reproduction Static Renewal 7 Day Chronic Ceriodaphnia dubia | 2 | 12 | 0 | ||
| LOEC Sub-Lethal Reproduction Static Renewal 7 Day Chronic Pimephales promelas | 2 | 12 | 0 | ||
| Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Ceriodaphnia dubia | 2 | 10 | 0 | ||
| Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Pimephales promelas | 2 | 10 | 0 | ||
| NOEC Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia | 2 | 10 | 0 | ||
| NOEC Lethal Static Renewal 7 Day Chronic Pimephales promelas | 2 | 10 | 0 | ||
| NOEC Sub-Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia | 2 | 10 | 0 | ||
| NOEC Sub-Lethal Static Renewal 7 Day Chronic Pimephales promelas | 2 | 10 | 0 | ||
| Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia | 2 | 10 | 0 | ||
| Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Pinephales promelas | 2 | 10 | 0 | ||
| LOEC Lethal Survival Static Renewal 7 Day Chronic Ceriodaphnia dubia | 2 | 10 | 0 | ||
| LOEC Lethal Survival Static Renewal 7 Day Chronic Pimephales promelas | 2 | 10 | 0 | ||
| LC50 Pass/Fail Static 24Hr Acute D. Pulex | 1 | 6 | 0 | ||
| LC50 Pass/Fail Static 24Hr Acute Pimephales promelas | 1 | 6 | 0 | ||
| 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 | ||
| Polychlorinated biphenyls [PCBs] | 1 | 3 | 0 | ||
| Toxicity characteristic leaching procedure | 1 | 3 | 0 | ||
| Ann. amt sludge disposed by other method | 1 | 3 | 0 | ||
| Annual amt of sludge incinerated | 1 | 3 | 0 | ||
| Annual sludge production, total | 1 | 3 | 0 | ||
| Annual amount of sludge land applied | 1 | 3 | 0 | ||
| Annual amt. sludge disposed surface unit | 1 | 3 | 0 | ||
| Annual amt sludge disposed in landfill | 1 | 3 | 0 | ||
| Annual amt sludge transported interstate | 1 | 3 | 0 | ||
| Compliance w/part 258 sludge requirement | 1 | 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 | ||
| 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 | ||
| Whole effluent toxicity - retest #1 | 3 | 0 | 0 | ||
| Whole effluent toxicity - retest #2 | 3 | 0 | 0 | ||
| Annual whole sludge application rate | 1 | 0 | 0 |
Inspections, violations and enforcement
- 3Single-event violations
| Date | What EPA recorded | Agency |
|---|---|---|
| December 9, 2025 | Permit Violations - Violation Specified in Comment | ST6 |
| January 31, 2024 | Permit Violations - Violation Specified in Comment | ST6 |
| July 31, 2018 | Permit Violations - Violation Specified in Comment | ST6 |
Inspections
EPA’s inspection file holds no inspection for NPDES TX0085588.
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 TX0085588.
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Figures from EPA’s ICIS-NPDES download, loaded September 15, 2026.