Clean Water Act discharge permit · NPDES TX0023833
CITY OF NASSAU BAY WWTP, Nassau Bay, TX: NPDES TX0023833 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MajorDischarger class
- 54Pollutants under a numeric limit
- 8Pollutants with an effluent exceedance
- 0Inspections on file
- 0Formal enforcement actions
CITY OF NASSAU BAY WWTP, held by NASSAU BAY, CITY OF, holds NPDES permit TX0023833, which discharges to Clear Creek Tidal. EPA’s file records it issued February 25, 2019 and expiring February 25, 2024.
CITY OF NASSAU BAY WWTP, Nassau Bay, Texas: Individual permit TX0023833, held by NASSAU BAY, CITY OF; Publicly owned treatment works; Administratively continued (past its expiration date and still in force until reissued); issued February 25, 2019, term to February 25, 2024; discharges to CLEAR CREEK TIDAL.
- Enterococci: 2 limits, 25 violations of any kind, 19 effluent exceedances, latest March 31, 2026, largest 99,999% over the limit.
- Nitrogen, ammonia total [as N]: 3 limits, 21 violations of any kind, 6 effluent exceedances, latest June 30, 2012, largest 110% over the limit.
- BOD, carbonaceous [5 day, 20 C]: 3 limits, 23 violations of any kind, 4 effluent exceedances, latest February 28, 2010, largest 19,964% over the limit.
- Solids, total suspended: 3 limits, 19 violations of any kind, 4 effluent exceedances, latest February 28, 2010, largest 225% over the limit.
- Chlorine, total residual: 2 limits, 15 violations of any kind, 4 effluent exceedances, latest August 31, 2017, largest 310% over the limit.
- Flow, in conduit or thru treatment plant: 4 limits, 31 violations of any kind, 3 effluent exceedances, latest August 31, 2017, largest 10% over the limit.
- pH: 3 limits, 16 violations of any kind, 2 effluent exceedances, latest June 30, 2023.
- Arsenic, dry weight: 5 limits, 18 violations of any kind, 1 effluent exceedance, latest July 31, 2007, largest 727% over the limit.
- LOEC Sub-Lethal Reproduction Static Renewal 7 Day Chronic Menidia menidia: 2 limits, 46 violations of any kind, 0 effluent exceedances.
- Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Americamysis bahia (Mysidopsis bahia): 2 limits, 40 violations of any kind, 0 effluent exceedances.
- NOEC Lethal Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia): 2 limits, 40 violations of any kind, 0 effluent exceedances.
- NOEC Sub-Lethal Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia): 2 limits, 40 violations of any kind, 0 effluent exceedances.
- Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia): 2 limits, 40 violations of any kind, 0 effluent exceedances.
- LOEC Lethal Survival Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia): 2 limits, 40 violations of any kind, 0 effluent exceedances.
- LOEC Sub-Lethal Reproduction Static Renewal 7 Day Chronic Americamysis bahia (Mysidopsis bahia): 2 limits, 40 violations of any kind, 0 effluent exceedances.
- LOEC Lethal Survival Static Renewal 7 Day Chronic Menidia menidia: 2 limits, 38 violations of any kind, 0 effluent exceedances.
- Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Menidia menidia: 2 limits, 36 violations of any kind, 0 effluent exceedances.
- NOEC Lethal Static Renewal 7 Day Chronic Menidia menidia: 2 limits, 36 violations of any kind, 0 effluent exceedances.
- NOEC Sub-Lethal Static Renewal 7 Day Chronic Menidia menidia: 2 limits, 36 violations of any kind, 0 effluent exceedances.
- Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Menidia menidia: 2 limits, 36 violations of any kind, 0 effluent exceedances.
- Chromium, sludge, total, dry weight [as Cr]: 5 limits, 21 violations of any kind, 0 effluent exceedances.
- Lead, sludge, total, dry weight [as Pb]: 3 limits, 13 violations of any kind, 0 effluent exceedances.
- Nickel, sludge, total, dry weight [as Ni]: 3 limits, 13 violations of any kind, 0 effluent exceedances.
- Mercury, sludge, total, dry weight [as Hg]: 3 limits, 13 violations of any kind, 0 effluent exceedances.
- Selenium, dry weight: 3 limits, 12 violations of any kind, 0 effluent exceedances.
- Copper, dry weight: 3 limits, 12 violations of any kind, 0 effluent exceedances.
- Cadmium, dry weight: 3 limits, 12 violations of any kind, 0 effluent exceedances.
- Molybdenum, sludge, total, dry weight [as Mo]: 3 limits, 12 violations of any kind, 0 effluent exceedances.
- Zinc, sludge, total, dry weight [as Zn]: 3 limits, 12 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, 8 violations of any kind, 0 effluent exceedances.
- Description of pathogen option used: 2 limits, 8 violations of any kind, 0 effluent exceedances.
- Vector attraction reduction alternative used: 2 limits, 8 violations of any kind, 0 effluent exceedances.
- Oxygen, dissolved [DO]: 1 limit, 5 violations of any kind, 0 effluent exceedances.
- LC50 Pass/Fail Static 24Hr Acute Americamysis bahia (formerly Mysidopsis bahia): 1 limit, 5 violations of any kind, 0 effluent exceedances.
- LC50 Pass/Fail Static 24Hr Acute Menidia menidia: 1 limit, 5 violations of any kind, 0 effluent exceedances.
- Whole effluent toxicity - retest #1: 3 limits, 4 violations of any kind, 0 effluent exceedances.
- Whole effluent toxicity - retest #2: 3 limits, 4 violations of any kind, 0 effluent exceedances.
- Polychlorinated biphenyls [PCBs]: 1 limit, 4 violations of any kind, 0 effluent exceedances.
- Toxicity characteristic leaching procedure: 1 limit, 4 violations of any kind, 0 effluent exceedances.
- Ann. amt sludge disposed by other method: 1 limit, 4 violations of any kind, 0 effluent exceedances.
- Annual amt of sludge incinerated: 1 limit, 4 violations of any kind, 0 effluent exceedances.
- Annual sludge production, total: 1 limit, 4 violations of any kind, 0 effluent exceedances.
- Annual amount of sludge land applied: 1 limit, 4 violations of any kind, 0 effluent exceedances.
- Annual amt. sludge disposed surface unit: 1 limit, 4 violations of any kind, 0 effluent exceedances.
- Annual amt sludge disposed in landfill: 1 limit, 4 violations of any kind, 0 effluent exceedances.
- Annual amt sludge transported interstate: 1 limit, 4 violations of any kind, 0 effluent exceedances.
- Unit w/liner/leachate collection system: 1 limit, 4 violations of any kind, 0 effluent exceedances.
- Compliance w/part 258 sludge requirement: 1 limit, 4 violations of any kind, 0 effluent exceedances.
- Boundary areas: 1 limit, 4 violations of any kind, 0 effluent exceedances.
- Salmonella: 1 limit, 4 violations of any kind, 0 effluent exceedances.
- Pollutant table from 503.13: 1 limit, 4 violations of any kind, 0 effluent exceedances.
- Fecal coliform: 1 limit, 3 violations of any kind, 0 effluent exceedances.
- Annual whole sludge application rate: 1 limit, 2 violations of any kind, 0 effluent exceedances.
Texas holds 1,720 Publicly owned treatment works coverages of this permit type in EPA’s file; 1,012 were issued before TX0023833.
Coverages issued nearest TX0023833
- February 11, 2019: STILLHOUSE BRANCH WWTP, Coryell County, TX0111791, held by GATESVILLE, CITY OF
- February 11, 2019: STEEP BANK FLAT BANK CREEK WWTP, Missouri City, TX0114855, held by MISSOURI CITY, CITY OF
- February 13, 2019: POLLARD CREEK WWTP, Mineral Wells, TX0047414, held by MINERAL WELLS, CITY OF
- February 14, 2019: BREMOND WWTP, Bremond, TX0023442, held by BREMOND, CITY OF
- February 19, 2019: CITY OF WHITESBORO WWTP, Whitesboro, TX0023566, held by WHITESBORO, CITY OF
- February 25, 2019: NORTHWEST HARRIS COUNTY MUD 24 WWTP, Houston, TX0092312, held by NW HARRIS COUNTY MUD 24
- February 26, 2019: TERRAMAR WWTP, Galveston, TX0066125, held by GALVESTON, CITY OF
- February 26, 2019: CITY OF DUMAS WWTP, Moore County, TX0135526, held by DUMAS, CITY OF
- February 26, 2019: POETRY VILLAGE WWTP, City Of Royse City, TX0138410, held by POETRY ROAD MUNICIPAL UTILITY DISTRICT OF ROCKWALL COUNTY
- February 28, 2019: HARRIS COUNTY WCID 113 WWTP, Houston, TX0062049, held by HARRIS COUNTY WCID 113
CITY OF NASSAU BAY WWTP among its neighbors
EPA’s permit file holds 560 discharge permits in the Clear Creek-Frontal Galveston Bay subwatershed (HUC 120402040100), TX0023833 among them. Its county holds 4,455, 195 of them major permits; TX0023833 is a major permit.
Other permits in the Clear Creek-Frontal Galveston Bay subwatershed (HUC 120402040100)
- 10 PUBLIC SANITARY SEWER RELOCATION PLANS FOR EDG, Seabrook: TXR1567OE, minor permit, discharging to TAYLOR LAKE, permit term to March 4, 2028
- 11806 PORT ROAD, Seabrook: TXR1501PX, minor permit, discharging to BAYPORT CHANNEL, permit term to March 4, 2028
- 3223-01 HMCL MOB3 - ASC, Houston: TXR1557VH, minor permit, discharging to CLEAR LAKE, permit term to March 4, 2028
- 34 ACRES EGRET BAY MASS GRADING, League City: TXR1555QU, minor permit, discharging to ROBINSON BAYOU, permit term to March 4, 2028
- 4 HORN PROPERTIES, Pasadena: TXR1565VB, minor permit, discharging to MIDDLE BAYOU, permit term to March 4, 2028
- 42 WL FROM CLCWA WP 3 TO LEAGUE CITY BOOSTER PUMP STATION, Webster: TXR1580WY, minor permit, discharging to COW BAYOU, permit term to March 4, 2028
- 541 WATER SYSTEM, Alvin: TX0141623, minor permit, discharging to DETENTION BASIN CHIGGER CRK;CLEAR CREEK, permit term to July 8, 2027
- 6951 MCHARD RD--JOJES CAPITAL, Houston: TXR1545QD, minor permit, discharging to CLEAR CREEK ABOVE TIDAL, permit term to March 4, 2028
- A SCHULMAN, La Porte: TX0111350, minor permit, discharging to UNNAMED DITCH; TAYLOR BAYOU, permit term to August 1, 2021
- ACC HOU - MCHARD, Fresno: TXR05GQ82, minor permit, permit term to August 13, 2026
Identity
| Facility as filed | CITY OF NASSAU BAY WWTP |
|---|---|
| Permittee as filed | NASSAU BAY, CITY OF |
| NPDES ID | TX0023833 |
| 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 25, 2019 |
| Expiration date | February 25, 2024 |
| Address | Nassau Bay, TX 77058 |
| Receiving water | CLEAR CREEK TIDAL |
| Receiving water impaired | 303(D) Listed |
| Subwatershed | Clear Creek-Frontal Galveston Bay (HUC 120402040100) |
Effluent limits and exceedances
- 54Pollutants on file
- 54Under a numeric limit
- 54With 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 |
|---|---|---|---|---|---|
| Enterococci | 2 | 25 | 19 | March 31, 2026 | 99,999% over the limit |
| Nitrogen, ammonia total [as N] | 3 | 21 | 6 | June 30, 2012 | 110% over the limit |
| BOD, carbonaceous [5 day, 20 C] | 3 | 23 | 4 | February 28, 2010 | 19,964% over the limit |
| Solids, total suspended | 3 | 19 | 4 | February 28, 2010 | 225% over the limit |
| Chlorine, total residual | 2 | 15 | 4 | August 31, 2017 | 310% over the limit |
| Flow, in conduit or thru treatment plant | 4 | 31 | 3 | August 31, 2017 | 10% over the limit |
| pH | 3 | 16 | 2 | June 30, 2023 | |
| Arsenic, dry weight | 5 | 18 | 1 | July 31, 2007 | 727% over the limit |
| LOEC Sub-Lethal Reproduction Static Renewal 7 Day Chronic Menidia menidia | 2 | 46 | 0 | ||
| Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Americamysis bahia (Mysidopsis bahia) | 2 | 40 | 0 | ||
| NOEC Lethal Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia) | 2 | 40 | 0 | ||
| NOEC Sub-Lethal Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia) | 2 | 40 | 0 | ||
| Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia) | 2 | 40 | 0 | ||
| LOEC Lethal Survival Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia) | 2 | 40 | 0 | ||
| LOEC Sub-Lethal Reproduction Static Renewal 7 Day Chronic Americamysis bahia (Mysidopsis bahia) | 2 | 40 | 0 | ||
| LOEC Lethal Survival Static Renewal 7 Day Chronic Menidia menidia | 2 | 38 | 0 | ||
| Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Menidia menidia | 2 | 36 | 0 | ||
| NOEC Lethal Static Renewal 7 Day Chronic Menidia menidia | 2 | 36 | 0 | ||
| NOEC Sub-Lethal Static Renewal 7 Day Chronic Menidia menidia | 2 | 36 | 0 | ||
| Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Menidia menidia | 2 | 36 | 0 | ||
| Chromium, sludge, total, dry weight [as Cr] | 5 | 21 | 0 | ||
| Lead, sludge, total, dry weight [as Pb] | 3 | 13 | 0 | ||
| Nickel, sludge, total, dry weight [as Ni] | 3 | 13 | 0 | ||
| Mercury, sludge, total, dry weight [as Hg] | 3 | 13 | 0 | ||
| Selenium, dry weight | 3 | 12 | 0 | ||
| Copper, dry weight | 3 | 12 | 0 | ||
| Cadmium, dry weight | 3 | 12 | 0 | ||
| Molybdenum, sludge, total, dry weight [as Mo] | 3 | 12 | 0 | ||
| Zinc, sludge, total, dry weight [as Zn] | 3 | 12 | 0 | ||
| Nickel, total [as Ni] | 2 | 8 | 0 | ||
| Level of pathogen requirements achieved | 2 | 8 | 0 | ||
| Description of pathogen option used | 2 | 8 | 0 | ||
| Vector attraction reduction alternative used | 2 | 8 | 0 | ||
| Oxygen, dissolved [DO] | 1 | 5 | 0 | ||
| LC50 Pass/Fail Static 24Hr Acute Americamysis bahia (formerly Mysidopsis bahia) | 1 | 5 | 0 | ||
| LC50 Pass/Fail Static 24Hr Acute Menidia menidia | 1 | 5 | 0 | ||
| Whole effluent toxicity - retest #1 | 3 | 4 | 0 | ||
| Whole effluent toxicity - retest #2 | 3 | 4 | 0 | ||
| Polychlorinated biphenyls [PCBs] | 1 | 4 | 0 | ||
| Toxicity characteristic leaching procedure | 1 | 4 | 0 | ||
| Ann. amt sludge disposed by other method | 1 | 4 | 0 | ||
| Annual amt of sludge incinerated | 1 | 4 | 0 | ||
| Annual sludge production, total | 1 | 4 | 0 | ||
| Annual amount of sludge land applied | 1 | 4 | 0 | ||
| Annual amt. sludge disposed surface unit | 1 | 4 | 0 | ||
| Annual amt sludge disposed in landfill | 1 | 4 | 0 | ||
| Annual amt sludge transported interstate | 1 | 4 | 0 | ||
| Unit w/liner/leachate collection system | 1 | 4 | 0 | ||
| Compliance w/part 258 sludge requirement | 1 | 4 | 0 | ||
| Boundary areas | 1 | 4 | 0 | ||
| Salmonella | 1 | 4 | 0 | ||
| Pollutant table from 503.13 | 1 | 4 | 0 | ||
| Fecal coliform | 1 | 3 | 0 | ||
| Annual whole sludge application rate | 1 | 2 | 0 |
Inspections, violations and enforcement
- 0Single-event violations
EPA’s single-event violation file, as loaded, holds no violation for NPDES TX0023833.
Inspections
EPA’s inspection file holds no inspection for NPDES TX0023833.
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 TX0023833.
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Figures from EPA’s ICIS-NPDES download, loaded September 15, 2026.