Clean Water Act discharge permit · NPDES TX0074284
CITY OF LIBERTY MAIN WWTP, Liberty, TX: NPDES TX0074284 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MajorDischarger class
- 55Pollutants under a numeric limit
- 7Pollutants with an effluent exceedance
- 1Inspections on file
- 1Formal enforcement actions
CITY OF LIBERTY MAIN WWTP, held by LIBERTY, CITY OF, holds NPDES permit TX0074284, which discharges to Old Trinity River Channel, Trinity. EPA’s file records it issued February 23, 2017 and expiring February 1, 2022.
CITY OF LIBERTY MAIN WWTP, Liberty, Texas: Individual permit TX0074284, held by LIBERTY, CITY OF; Publicly owned treatment works; Administratively continued (past its expiration date and still in force until reissued); issued February 23, 2017, term to February 1, 2022; discharges to OLD TRINITY RIVER CHANNEL, TRINITY.
- Nitrogen, ammonia total [as N]: 3 limits, 63 violations of any kind, 42 effluent exceedances, latest June 30, 2023, largest 2,481% over the limit.
- E. coli: 2 limits, 31 violations of any kind, 15 effluent exceedances, latest September 30, 2023, largest 1,128% over the limit.
- Mercury, total [as Hg]: 3 limits, 35 violations of any kind, 14 effluent exceedances, latest September 30, 2022, largest 28,490% over the limit.
- Chlorine, total residual: 2 limits, 26 violations of any kind, 14 effluent exceedances, latest June 30, 2024, largest 3,400% over the limit.
- Flow, in conduit or thru treatment plant: 4 limits, 32 violations of any kind, 4 effluent exceedances, latest October 31, 2023, largest 420% over the limit.
- BOD, carbonaceous [5 day, 20 C]: 3 limits, 25 violations of any kind, 4 effluent exceedances, latest June 30, 2015, largest 61% over the limit.
- Solids, total suspended: 3 limits, 22 violations of any kind, 1 effluent exceedance, latest March 31, 2023, largest 2% over the limit.
- Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Pimephales promelas: 4 limits, 26 violations of any kind, 0 effluent exceedances.
- NOEC Lethal Static Renewal 7 Day Chronic Pimephales promelas: 4 limits, 26 violations of any kind, 0 effluent exceedances.
- NOEC Sub-Lethal Static Renewal 7 Day Chronic Pimephales promelas: 4 limits, 26 violations of any kind, 0 effluent exceedances.
- Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia: 4 limits, 26 violations of any kind, 0 effluent exceedances.
- Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Pinephales promelas: 4 limits, 26 violations of any kind, 0 effluent exceedances.
- LOEC Lethal Survival Static Renewal 7 Day Chronic Ceriodaphnia dubia: 4 limits, 26 violations of any kind, 0 effluent exceedances.
- LOEC Lethal Survival Static Renewal 7 Day Chronic Pimephales promelas: 4 limits, 26 violations of any kind, 0 effluent exceedances.
- LOEC Sub-Lethal Reproduction Static Renewal 7 Day Chronic Ceriodaphnia dubia: 4 limits, 26 violations of any kind, 0 effluent exceedances.
- LOEC Sub-Lethal Reproduction Static Renewal 7 Day Chronic Pimephales promelas: 4 limits, 26 violations of any kind, 0 effluent exceedances.
- Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Ceriodaphnia dubia: 4 limits, 25 violations of any kind, 0 effluent exceedances.
- NOEC Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia: 4 limits, 25 violations of any kind, 0 effluent exceedances.
- NOEC Sub-Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia: 4 limits, 25 violations of any kind, 0 effluent exceedances.
- pH: 3 limits, 18 violations of any kind, 0 effluent exceedances.
- Arsenic, dry weight: 5 limits, 17 violations of any kind, 0 effluent exceedances.
- Chromium, sludge, total, dry weight [as Cr]: 5 limits, 17 violations of any kind, 0 effluent exceedances.
- Selenium, dry weight: 3 limits, 9 violations of any kind, 0 effluent exceedances.
- Copper, dry weight: 3 limits, 9 violations of any kind, 0 effluent exceedances.
- Cadmium, dry weight: 3 limits, 9 violations of any kind, 0 effluent exceedances.
- Molybdenum, sludge, total, dry weight [as Mo]: 3 limits, 9 violations of any kind, 0 effluent exceedances.
- Zinc, sludge, total, dry weight [as Zn]: 3 limits, 9 violations of any kind, 0 effluent exceedances.
- Lead, sludge, total, dry weight [as Pb]: 3 limits, 9 violations of any kind, 0 effluent exceedances.
- Nickel, sludge, total, dry weight [as Ni]: 3 limits, 9 violations of any kind, 0 effluent exceedances.
- Mercury, sludge, total, dry weight [as Hg]: 3 limits, 9 violations of any kind, 0 effluent exceedances.
- Nickel, total [as Ni]: 2 limits, 8 violations of any kind, 0 effluent exceedances.
- Level of pathogen requirements achieved: 2 limits, 7 violations of any kind, 0 effluent exceedances.
- Description of pathogen option used: 2 limits, 7 violations of any kind, 0 effluent exceedances.
- Vector attraction reduction alternative used: 2 limits, 7 violations of any kind, 0 effluent exceedances.
- Oxygen, dissolved [DO]: 1 limit, 7 violations of any kind, 0 effluent exceedances.
- Unit w/liner/leachate collection system: 1 limit, 4 violations of any kind, 0 effluent exceedances.
- Boundary areas: 1 limit, 4 violations of any kind, 0 effluent exceedances.
- LC50 Pass/Fail Static 24Hr Acute D. Pulex: 1 limit, 4 violations of any kind, 0 effluent exceedances.
- LC50 Pass/Fail Static 24Hr Acute Pimephales promelas: 1 limit, 4 violations of any kind, 0 effluent exceedances.
- Fecal coliform: 1 limit, 3 violations of any kind, 0 effluent exceedances.
- Salmonella: 1 limit, 3 violations of any kind, 0 effluent exceedances.
- Pollutant table from 503.13: 1 limit, 3 violations of any kind, 0 effluent exceedances.
- Compliance w/part 258 sludge requirement: 1 limit, 2 violations of any kind, 0 effluent exceedances.
- Polychlorinated biphenyls [PCBs]: 1 limit, 1 violation of any kind, 0 effluent exceedances.
- Toxicity characteristic leaching procedure: 1 limit, 1 violation of any kind, 0 effluent exceedances.
- Ann. amt sludge disposed by other method: 1 limit, 1 violation of any kind, 0 effluent exceedances.
- Annual amt of sludge incinerated: 1 limit, 1 violation of any kind, 0 effluent exceedances.
- Annual sludge production, total: 1 limit, 1 violation of any kind, 0 effluent exceedances.
- Annual amount of sludge land applied: 1 limit, 1 violation of any kind, 0 effluent exceedances.
- Annual amt. sludge disposed surface unit: 1 limit, 1 violation of any kind, 0 effluent exceedances.
- Annual amt sludge disposed in landfill: 1 limit, 1 violation of any kind, 0 effluent exceedances.
- Annual amt sludge transported interstate: 1 limit, 1 violation of any kind, 0 effluent exceedances.
- Whole effluent toxicity - retest #1: 7 limits, 0 violations of any kind, 0 effluent exceedances.
- Whole effluent toxicity - retest #2: 7 limits, 0 violations of any kind, 0 effluent exceedances.
- Annual whole sludge application rate: 1 limit, 0 violations of any kind, 0 effluent exceedances.
- September 29, 2026: State CWA Penalty AO (State), $63,525 state or local penalty.
- April 7, 2026: Permit Violations - Violation Specified in Comment (ST6).
- April 7, 2026: Evaluation (S).
- September 14, 2023: Permit Violations - Violation Specified in Comment (ST6).
- September 30, 2021: Permit Violations - Violation Specified in Comment (ST6).
Texas holds 1,720 Publicly owned treatment works coverages of this permit type in EPA’s file; 410 were issued before TX0074284.
Coverages issued nearest TX0074284
- February 15, 2017: PORT ISABEL WWTP, Port Isabel, TX0023647, held by LAGUNA MADRE WATER DISTRICT
- February 15, 2017: TDCJ POWLEDGE UNIT WWTF, Anderson County, TX0089044, held by TEXAS DEPARTMENT OF CRIMINAL JUSTICE
- February 15, 2017: PIRATES BEACH WWTP, Galveston, TX0126977, held by CITY OF GALVESTON
- February 23, 2017: MOUNTAIN CREEK REGIONAL WWTP, Midlothian, TX0025011, held by TRINITY RIVER AUTHORITY OF TEXAS
- February 23, 2017: CITY OF NEWARK WWTP, Newark, TX0057231, held by CITY OF NEWARK
- February 23, 2017: MAIN PLANT, Childress, TX0136905, held by CHILDRESS, CITY OF
- February 28, 2017: TDCJ WAINRIGHT UNIT, Houston County, TX0031593, held by TEXAS DEPARTMENT OF CRIMINAL JUSTICE
- February 28, 2017: CITY OF MAYPEARL WWTP, Maypearl, TX0053571, held by CITY OF MAYPEARL
- February 28, 2017: CITY OF CALLISBURG WWTP, Cooke County, TX0072362, held by CITY OF CALLISBURG
- March 3, 2017: HARRIS COUNTY MUD 6 WWTP, Houston, TX0026352, held by HARRIS COUNTY MUD 6
CITY OF LIBERTY MAIN WWTP among its neighbors
EPA’s permit file holds 11 discharge permits in the Linney Creek-Trinity River subwatershed (HUC 120302030301), TX0074284 among them. Its county holds 190, 4 of them major permits; TX0074284 is a major permit.
Other permits in the Linney Creek-Trinity River subwatershed (HUC 120302030301)
- CITY OF LIBERTY WASTEWATER TREATMENT PLANT, Liberty: TXR05GG01, minor permit, permit term to August 13, 2026
- KFJ CHEMICAL, Liberty: TXR05GZ63, minor permit, permit term to August 13, 2026
- LIBERTY ISD, Liberty: TXR1591XT, minor permit, discharging to TRINITY RIVER, permit term to March 4, 2028
- LIBERTY READY MIX, Liberty: TXG113967, minor permit, permit term to November 6, 2026
- LIBERTY SHOP, Liberty: TXR05EX60, minor permit, permit term to August 13, 2026
- PECAN ORCHARD ESTATES, Dayton: TXR1512UR, minor permit, discharging to TRINITY RIVER TIDAL, permit term to March 4, 2028
- PTC LIBERTY TUBULARS, Liberty: TXR05FJ77, minor permit, permit term to August 13, 2026
- SACKETT MATERIALS AND CONSTRUCTION, Dayton: TXR05GK87, minor permit, permit term to August 13, 2026
- SAMS CLUB DISTRIBUTION CENTER 6698, Dayton: TXRNEBT10, minor permit, permit term to August 13, 2026
- THE COLONY AT COLE SPRINGS AND LIFT STATION, Buda: TXR1579PS, minor permit, discharging to UNNAMED TRIBUTARIES, permit term to March 4, 2028
Identity
| Facility as filed | CITY OF LIBERTY MAIN WWTP |
|---|---|
| Permittee as filed | LIBERTY, CITY OF |
| NPDES ID | TX0074284 |
| 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 | February 23, 2017 |
| Expiration date | February 1, 2022 |
| Address | Liberty, TX 77575 |
| Receiving water | OLD TRINITY RIVER CHANNEL, TRINITY |
| Subwatershed | Linney Creek-Trinity River (HUC 120302030301) |
| SIC | 4952 – Sewerage Systems |
Effluent limits and exceedances
- 55Pollutants on file
- 55Under a numeric limit
- 52With a violation of any kind
- 7With 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 | 63 | 42 | June 30, 2023 | 2,481% over the limit |
| E. coli | 2 | 31 | 15 | September 30, 2023 | 1,128% over the limit |
| Mercury, total [as Hg] | 3 | 35 | 14 | September 30, 2022 | 28,490% over the limit |
| Chlorine, total residual | 2 | 26 | 14 | June 30, 2024 | 3,400% over the limit |
| Flow, in conduit or thru treatment plant | 4 | 32 | 4 | October 31, 2023 | 420% over the limit |
| BOD, carbonaceous [5 day, 20 C] | 3 | 25 | 4 | June 30, 2015 | 61% over the limit |
| Solids, total suspended | 3 | 22 | 1 | March 31, 2023 | 2% over the limit |
| Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Pimephales promelas | 4 | 26 | 0 | ||
| NOEC Lethal Static Renewal 7 Day Chronic Pimephales promelas | 4 | 26 | 0 | ||
| NOEC Sub-Lethal Static Renewal 7 Day Chronic Pimephales promelas | 4 | 26 | 0 | ||
| Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia | 4 | 26 | 0 | ||
| Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Pinephales promelas | 4 | 26 | 0 | ||
| LOEC Lethal Survival Static Renewal 7 Day Chronic Ceriodaphnia dubia | 4 | 26 | 0 | ||
| LOEC Lethal Survival Static Renewal 7 Day Chronic Pimephales promelas | 4 | 26 | 0 | ||
| LOEC Sub-Lethal Reproduction Static Renewal 7 Day Chronic Ceriodaphnia dubia | 4 | 26 | 0 | ||
| LOEC Sub-Lethal Reproduction Static Renewal 7 Day Chronic Pimephales promelas | 4 | 26 | 0 | ||
| Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Ceriodaphnia dubia | 4 | 25 | 0 | ||
| NOEC Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia | 4 | 25 | 0 | ||
| NOEC Sub-Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia | 4 | 25 | 0 | ||
| pH | 3 | 18 | 0 | ||
| Arsenic, dry weight | 5 | 17 | 0 | ||
| Chromium, sludge, total, dry weight [as Cr] | 5 | 17 | 0 | ||
| Selenium, dry weight | 3 | 9 | 0 | ||
| Copper, dry weight | 3 | 9 | 0 | ||
| Cadmium, dry weight | 3 | 9 | 0 | ||
| Molybdenum, sludge, total, dry weight [as Mo] | 3 | 9 | 0 | ||
| Zinc, sludge, total, dry weight [as Zn] | 3 | 9 | 0 | ||
| Lead, sludge, total, dry weight [as Pb] | 3 | 9 | 0 | ||
| Nickel, sludge, total, dry weight [as Ni] | 3 | 9 | 0 | ||
| Mercury, sludge, total, dry weight [as Hg] | 3 | 9 | 0 | ||
| Nickel, total [as Ni] | 2 | 8 | 0 | ||
| Level of pathogen requirements achieved | 2 | 7 | 0 | ||
| Description of pathogen option used | 2 | 7 | 0 | ||
| Vector attraction reduction alternative used | 2 | 7 | 0 | ||
| Oxygen, dissolved [DO] | 1 | 7 | 0 | ||
| Unit w/liner/leachate collection system | 1 | 4 | 0 | ||
| Boundary areas | 1 | 4 | 0 | ||
| LC50 Pass/Fail Static 24Hr Acute D. Pulex | 1 | 4 | 0 | ||
| LC50 Pass/Fail Static 24Hr Acute Pimephales promelas | 1 | 4 | 0 | ||
| Fecal coliform | 1 | 3 | 0 | ||
| Salmonella | 1 | 3 | 0 | ||
| Pollutant table from 503.13 | 1 | 3 | 0 | ||
| Compliance w/part 258 sludge requirement | 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 | ||
| Annual amt sludge disposed in landfill | 1 | 1 | 0 | ||
| Annual amt sludge transported interstate | 1 | 1 | 0 | ||
| Whole effluent toxicity - retest #1 | 7 | 0 | 0 | ||
| Whole effluent toxicity - retest #2 | 7 | 0 | 0 | ||
| Annual whole sludge application rate | 1 | 0 | 0 |
Inspections, violations and enforcement
- 3Single-event violations
| Date | What EPA recorded | Agency |
|---|---|---|
| April 7, 2026 | Permit Violations - Violation Specified in Comment | ST6 |
| September 14, 2023 | Permit Violations - Violation Specified in Comment | ST6 |
| September 30, 2021 | Permit Violations - Violation Specified in Comment | ST6 |
Inspections
| Date | What EPA recorded | Agency |
|---|---|---|
| April 7, 2026 | Evaluation | S |
Formal enforcement and penalties
1 formal actions, 1 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.
| Date | What EPA recorded | Agency | Federal penalty | State or local penalty |
|---|---|---|---|---|
| September 29, 2026 | State CWA Penalty AO | State | $63,525 |
Informal enforcement
EPA’s informal enforcement file holds no action for NPDES TX0074284.
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Figures from EPA’s ICIS-NPDES download, loaded October 14, 2026.