Clean Water Act discharge permit · NPDES TX0103721
NORTHBELT WWTP, Humble, TX: NPDES TX0103721 discharge permit, effluent exceedances, inspections, penalties
- EffectivePermit status
- MajorDischarger class
- 21Pollutants under a numeric limit
- 5Pollutants with an effluent exceedance
- 0Inspections on file
- 0Formal enforcement actions
NORTHBELT WWTP, held by HOUSTON, CITY OF, holds NPDES permit TX0103721, which discharges to Greens Bayou. EPA’s file records it issued February 1, 2023 and expiring January 31, 2028.
NORTHBELT WWTP, Humble, Texas: Individual permit TX0103721, held by HOUSTON, CITY OF; Publicly owned treatment works; Effective; issued February 1, 2023, term to January 31, 2028; discharges to GREENS BAYOU.
- Nitrogen, ammonia total [as N]: 6 limits, 15 violations of any kind, 9 effluent exceedances, latest May 31, 2026, largest 100% over the limit.
- Whole Effluent Toxicity [WET] - C. dubia: 4 limits, 12 violations of any kind, 8 effluent exceedances, latest June 30, 2020, largest 90% over the limit.
- E. coli: 2 limits, 12 violations of any kind, 8 effluent exceedances, latest September 30, 2025, largest 99,999% over the limit.
- Solids, total suspended: 3 limits, 13 violations of any kind, 7 effluent exceedances, latest July 31, 2024, largest 100% over the limit.
- BOD, carbonaceous [5 day, 20 C]: 3 limits, 13 violations of any kind, 3 effluent exceedances, latest May 31, 2026, largest 99,999% over the limit.
- Flow, in conduit or thru treatment plant: 4 limits, 6 violations of any kind, 0 effluent exceedances.
- pH: 2 limits, 4 violations of any kind, 0 effluent exceedances.
- Chlorine, total residual: 2 limits, 4 violations of any kind, 0 effluent exceedances.
- Oxygen, dissolved [DO]: 1 limit, 2 violations of any kind, 0 effluent exceedances.
- LC50 Pass/Fail Static 24Hr Acute Pimephales promelas: 1 limit, 2 violations of any kind, 0 effluent exceedances.
- Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Ceriodaphnia dubia: 0 limits, 2 violations of any kind, 0 effluent exceedances.
- Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Pimephales promelas: 0 limits, 2 violations of any kind, 0 effluent exceedances.
- NOEC Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia: 0 limits, 2 violations of any kind, 0 effluent exceedances.
- NOEC Lethal Static Renewal 7 Day Chronic Pimephales promelas: 0 limits, 2 violations of any kind, 0 effluent exceedances.
- NOEC Sub-Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia: 0 limits, 2 violations of any kind, 0 effluent exceedances.
- NOEC Sub-Lethal Static Renewal 7 Day Chronic Pimephales promelas: 0 limits, 2 violations of any kind, 0 effluent exceedances.
- Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia: 0 limits, 2 violations of any kind, 0 effluent exceedances.
- LOEC Lethal Survival Static Renewal 7 Day Chronic Ceriodaphnia dubia: 0 limits, 2 violations of any kind, 0 effluent exceedances.
- LOEC Sub-Lethal Reproduction Static Renewal 7 Day Chronic Ceriodaphnia dubia: 0 limits, 2 violations of any kind, 0 effluent exceedances.
- LC50 Pass/Fail Static 24Hr Acute D. Pulex: 1 limit, 1 violation of any kind, 0 effluent exceedances.
- Whole effluent toxicity - retest #1: 5 limits, 0 violations of any kind, 0 effluent exceedances.
- Whole effluent toxicity - retest #2: 5 limits, 0 violations of any kind, 0 effluent exceedances.
- IC25 Low Flow Pass/Fail Lethal Static Renewal 7 Day Chronic Pimephales promelas: 4 limits, 0 violations of any kind, 0 effluent exceedances.
- IC25 Low Flow Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Pimephales promelas: 4 limits, 0 violations of any kind, 0 effluent exceedances.
- IC25 Lethal Static Renewal 7 Day Chronic Pimephales promelas: 4 limits, 0 violations of any kind, 0 effluent exceedances.
- IC25 Sub-Lethal Static Renewal 7 Day Chronic Pimephales promelas: 4 limits, 0 violations of any kind, 0 effluent exceedances.
- IC25 Low Flow Pass/Fail Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia: 2 limits, 0 violations of any kind, 0 effluent exceedances.
- IC25 Low Flow Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia: 2 limits, 0 violations of any kind, 0 effluent exceedances.
- IC25 Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia: 2 limits, 0 violations of any kind, 0 effluent exceedances.
- IC25 Sub-Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia: 2 limits, 0 violations of any kind, 0 effluent exceedances.
- November 23, 2022: Dry-weather SSO discharge to waters of the U.S., not permit compliant, no endangerment (EP6).
- October 2, 2022: Dry-weather SSO, no discharge to waters of the U.S., not permit compliant, no endangerment (EP6).
- September 27, 2022: Dry-weather SSO discharge to waters of the U.S., not permit compliant, no endangerment (EP6).
- March 30, 2022: Dry-weather SSO, no discharge to waters of the U.S., not permit compliant, no endangerment (EP6).
- January 31, 2022: Dry-weather SSO discharge to waters of the U.S., not permit compliant, no endangerment (EP6).
- October 13, 2021: Dry-weather SSO, no discharge to waters of the U.S., not permit compliant, no endangerment (EP6).
- July 29, 2021: Dry-weather SSO discharge to waters of the U.S. that may endanger health or the environment (EP6).
- February 28, 2021: Dry-weather SSO discharge to waters of the U.S., not permit compliant, no endangerment (EP6).
- December 10, 2020: Dry-weather SSO, no discharge to waters of the U.S., not permit compliant, no endangerment (EP6).
- December 3, 2019: Dry-weather SSO, no discharge to waters of the U.S., that may endanger health or the environment (EP6).
- October 27, 2018: WW SSO - Overflow to Dry Land or Building Backup (EP6).
- May 10, 2018: Permit Violations - Violation Specified in Comment (ST6).
- January 30, 2018: WW SSO - Discharge to Waters (EP6).
Texas holds 1,720 Publicly owned treatment works coverages of this permit type in EPA’s file; 1,623 were issued before TX0103721. HOUSTON, CITY OF holds 26 permits in Texas.
Other permits held by HOUSTON, CITY OF
- PARK TEN MUD, Houston: TX0026395, issued September 28, 2017
- GREEN RIDGE WWTP, Houston: TX0026433, issued September 8, 2022
- WESTWAY WWTP, Houston: TX0026875, issued September 26, 2019
- HARRIS COUNTY WCID 111 WWTP, Houston: TX0027201, issued September 11, 2018
- ALMEDA SIMS WWTP, Houston: TX0034924, issued October 17, 2018
- SOUTHEAST WWTP, Houston: TX0035009, issued May 26, 2020
- TURKEY CREEK WWTP, Houston: TX0035017, issued December 29, 2020
- CLINTON PARK WWTP, Houston: TX0035106, issued December 20, 2017
- NORTHGATE WWTP, Houston: TX0055310, issued May 25, 2018
- WHITE OAK WWTP, Houston: TX0057347, issued November 15, 2017
Coverages issued nearest TX0103721
- November 18, 2022: MAYDE CREEK MUD REGIONAL WWTF, City Of Houston, TX0076660, held by MAYDE CREEK MUD
- November 21, 2022: NORTHSIDE WASTEWATER TREATMENT FACILITY, Henderson, TX0141585, held by HENDERSON, CITY OF
- November 22, 2022: CRESSON MUD NO 1 WWTF, City Of Cresson, TX0142565, held by CRESSON MUD 1 OF HOOD COUNTY
- December 22, 2022: CLEARWATER CREEK WWTP, Marion, TX0140546, held by GREEN VALLEY SUD
- January 30, 2023: SOUTHSIDE WTP, Henderson, TX0141763, held by HENDERSON, CITY OF
- February 10, 2023: HARRIS COUNTY MUD 200 WWTP, Houston, TX0085413, held by HARRIS COUNTY MUD 200
- February 20, 2023: CITY OF COLORADO CITY WWTP, Colorado City, TX0142778, held by COLORADO CITY, CITY OF
- February 27, 2023: MONTGOMERY COUNTY MUD NO 199 WWTP, Magnolia, TX0142212, held by MONTGOMERY COUNTY MUD NO 199
- March 17, 2023: CITY OF BERTRAM WWTP, Bertram, TX0142085, held by BERTRAM, CITY OF
- March 21, 2023: EAST MONTGOMERY COUNTY 13 WWTP, Splendora, TX0143537, held by EAST MONTGOMERY COUNTY MUD 13
NORTHBELT WWTP among its neighbors
EPA’s permit file holds 181 discharge permits in the Upper Greens Bayou subwatershed (HUC 120401040603), TX0103721 among them. Its county holds 4,455, 195 of them major permits; TX0103721 is a major permit.
Other permits in the Upper Greens Bayou subwatershed (HUC 120401040603)
- 3S-SUPERIOR SEALING SERVICES, Houston: TXRNECF70, minor permit, permit term to August 13, 2026
- 6410 WINFIELD RD, Houston: TXR1550VH, minor permit, discharging to GREENS BAYOU, permit term to March 4, 2028
- 7515 RANKIN RD, Humble: TXR1506YI, minor permit, discharging to HALLS BAYOU, permit term to March 4, 2028
- ACC HOU - PINAFORE, Houston: TXR05GR38, minor permit, permit term to August 13, 2026
- ACCUWELD, Houston: TXRNEBO60, minor permit, permit term to August 13, 2026
- AIRTEX CBP, Houston: TXG111552, minor permit, discharging to GREENS BAYOU, permit term to November 7, 2021
- ALD WEST II, Houston: TXR1559YE, minor permit, discharging to HOODS BAYOU, permit term to March 4, 2028
- ALDINE FOREST WWTP, Houston: TX0069582, minor permit, discharging to HCFCD P138-00-00;GREENS BAYOU ABOVE TIDAL, permit term to December 1, 2022
- ALDINE ISD CHRISMAN RD WTP, Houston: TX0094188, minor permit, discharging to HARRIS COUNTY CDC P138-00-00;GREENS BAYOU, permit term to December 1, 2022
- ALDINE JUNIOR HIGH SCHOOL WWTP, Houston: TX0078808, minor permit, discharging to SAN JACINTO RIVER BASIN, permit term to December 1, 2014
Identity
| Facility as filed | NORTHBELT WWTP |
|---|---|
| Permittee as filed | HOUSTON, CITY OF |
| NPDES ID | TX0103721 |
| Permit status | Effective |
| Permit type | Individual permit |
| Discharger class | Major discharger |
| Facility type | Publicly owned treatment works |
| Program | Publicly owned treatment works |
| Issued | February 1, 2023 |
| Expiration date | January 31, 2028 |
| Address | Humble, TX 77396 |
| Receiving water | GREENS BAYOU |
| Receiving water impaired | 303(D) Listed |
| Subwatershed | Upper Greens Bayou (HUC 120401040603) |
| Program components on file | POTW, Pretreatment |
| SIC | 4952 – Sewerage Systems |
Effluent limits and exceedances
- 30Pollutants on file
- 21Under a numeric limit
- 20With a violation of any kind
- 5With 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] | 6 | 15 | 9 | May 31, 2026 | 100% over the limit |
| Whole Effluent Toxicity [WET] - C. dubia | 4 | 12 | 8 | June 30, 2020 | 90% over the limit |
| E. coli | 2 | 12 | 8 | September 30, 2025 | 99,999% over the limit |
| Solids, total suspended | 3 | 13 | 7 | July 31, 2024 | 100% over the limit |
| BOD, carbonaceous [5 day, 20 C] | 3 | 13 | 3 | May 31, 2026 | 99,999% over the limit |
| Flow, in conduit or thru treatment plant | 4 | 6 | 0 | ||
| pH | 2 | 4 | 0 | ||
| Chlorine, total residual | 2 | 4 | 0 | ||
| Oxygen, dissolved [DO] | 1 | 2 | 0 | ||
| LC50 Pass/Fail Static 24Hr Acute Pimephales promelas | 1 | 2 | 0 | ||
| Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Ceriodaphnia dubia | 0 | 2 | 0 | ||
| Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Pimephales promelas | 0 | 2 | 0 | ||
| NOEC Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia | 0 | 2 | 0 | ||
| NOEC Lethal Static Renewal 7 Day Chronic Pimephales promelas | 0 | 2 | 0 | ||
| NOEC Sub-Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia | 0 | 2 | 0 | ||
| NOEC Sub-Lethal Static Renewal 7 Day Chronic Pimephales promelas | 0 | 2 | 0 | ||
| Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia | 0 | 2 | 0 | ||
| LOEC Lethal Survival Static Renewal 7 Day Chronic Ceriodaphnia dubia | 0 | 2 | 0 | ||
| LOEC Sub-Lethal Reproduction Static Renewal 7 Day Chronic Ceriodaphnia dubia | 0 | 2 | 0 | ||
| LC50 Pass/Fail Static 24Hr Acute D. Pulex | 1 | 1 | 0 | ||
| Whole effluent toxicity - retest #1 | 5 | 0 | 0 | ||
| Whole effluent toxicity - retest #2 | 5 | 0 | 0 | ||
| IC25 Low Flow Pass/Fail Lethal Static Renewal 7 Day Chronic Pimephales promelas | 4 | 0 | 0 | ||
| IC25 Low Flow Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Pimephales promelas | 4 | 0 | 0 | ||
| IC25 Lethal Static Renewal 7 Day Chronic Pimephales promelas | 4 | 0 | 0 | ||
| IC25 Sub-Lethal Static Renewal 7 Day Chronic Pimephales promelas | 4 | 0 | 0 | ||
| IC25 Low Flow Pass/Fail Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia | 2 | 0 | 0 | ||
| IC25 Low Flow Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia | 2 | 0 | 0 | ||
| IC25 Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia | 2 | 0 | 0 | ||
| IC25 Sub-Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia | 2 | 0 | 0 |
Inspections, violations and enforcement
- 13Single-event violations
| Date | What EPA recorded | Agency |
|---|---|---|
| November 23, 2022 | Dry-weather SSO discharge to waters of the U.S., not permit compliant, no endangerment | EP6 |
| October 2, 2022 | Dry-weather SSO, no discharge to waters of the U.S., not permit compliant, no endangerment | EP6 |
| September 27, 2022 | Dry-weather SSO discharge to waters of the U.S., not permit compliant, no endangerment | EP6 |
| March 30, 2022 | Dry-weather SSO, no discharge to waters of the U.S., not permit compliant, no endangerment | EP6 |
| January 31, 2022 | Dry-weather SSO discharge to waters of the U.S., not permit compliant, no endangerment | EP6 |
| October 13, 2021 | Dry-weather SSO, no discharge to waters of the U.S., not permit compliant, no endangerment | EP6 |
| July 29, 2021 | Dry-weather SSO discharge to waters of the U.S. that may endanger health or the environment | EP6 |
| February 28, 2021 | Dry-weather SSO discharge to waters of the U.S., not permit compliant, no endangerment | EP6 |
| December 10, 2020 | Dry-weather SSO, no discharge to waters of the U.S., not permit compliant, no endangerment | EP6 |
| December 3, 2019 | Dry-weather SSO, no discharge to waters of the U.S., that may endanger health or the environment | EP6 |
| October 27, 2018 | WW SSO - Overflow to Dry Land or Building Backup | EP6 |
| May 10, 2018 | Permit Violations - Violation Specified in Comment | ST6 |
| January 30, 2018 | WW SSO - Discharge to Waters | EP6 |
Inspections
EPA’s inspection file holds no inspection for NPDES TX0103721.
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 TX0103721.
Watch this permit
One permit holder, $99/month. Watch the register for one permit holder and the places and receiving waters tied to its permits. Choose “One permit holder” and enter this permit’s NPDES ID, TX0103721.
Start the watch
- One permit holder — $99/month
- One watershed — $2,990/year
- One state — $4,990/year
- The whole register — $18,000/year
How we handle your data → Privacy
Nearby on the register
- Discharge permits in Humble
- Every permit record in Humble, A to Z
- Discharge permits in Texas
- Every permit record in Texas, A to Z
Figures from EPA’s ICIS-NPDES download, loaded October 14, 2026.