Clean Water Act discharge permit · NPDES TX0057622
CITY OF ALAMO WWTP, Alamo, TX: NPDES TX0057622 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MajorDischarger class
- 56Pollutants under a numeric limit
- 7Pollutants with an effluent exceedance
- 1Inspections on file
- 1Formal enforcement actions
CITY OF ALAMO WWTP, held by ALAMO, CITY OF, holds NPDES permit TX0057622, which discharges to Arroyo Colorado Above Tidal. EPA’s file records it issued March 12, 2020 and expiring March 12, 2025.
CITY OF ALAMO WWTP, Alamo, Texas: Individual permit TX0057622, held by ALAMO, CITY OF; Publicly owned treatment works; Administratively continued (past its expiration date and still in force until reissued); issued March 12, 2020, term to March 12, 2025; discharges to Arroyo Colorado Above Tidal.
- BOD, 5-day, 20 deg. C: 3 limits, 172 violations of any kind, 49 effluent exceedances, latest March 31, 2023, largest 70% over the limit.
- E. coli: 4 limits, 52 violations of any kind, 46 effluent exceedances, latest March 31, 2026, largest 535% over the limit.
- Solids, total suspended: 8 limits, 120 violations of any kind, 39 effluent exceedances, latest October 31, 2024, largest 41% over the limit.
- Nitrogen, ammonia total [as N]: 6 limits, 64 violations of any kind, 25 effluent exceedances, latest April 30, 2026, largest 600% over the limit.
- Chlorine, total residual: 2 limits, 11 violations of any kind, 7 effluent exceedances, latest January 31, 2025, largest 1,430% over the limit.
- Oxygen, dissolved [DO]: 1 limit, 31 violations of any kind, 2 effluent exceedances, latest April 30, 2010, largest 48% over the limit.
- pH: 3 limits, 57 violations of any kind, 1 effluent exceedance, latest November 30, 2005.
- Flow, in conduit or thru treatment plant: 4 limits, 79 violations of any kind, 0 effluent exceedances.
- Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Ceriodaphnia dubia: 2 limits, 41 violations of any kind, 0 effluent exceedances.
- BOD, carbonaceous [5 day, 20 C]: 6 limits, 39 violations of any kind, 0 effluent exceedances.
- NOEC Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia: 2 limits, 39 violations of any kind, 0 effluent exceedances.
- NOEC Sub-Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia: 2 limits, 39 violations of any kind, 0 effluent exceedances.
- Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia: 2 limits, 38 violations of any kind, 0 effluent exceedances.
- Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Pinephales promelas: 2 limits, 38 violations of any kind, 0 effluent exceedances.
- LOEC Lethal Survival Static Renewal 7 Day Chronic Ceriodaphnia dubia: 2 limits, 38 violations of any kind, 0 effluent exceedances.
- LOEC Lethal Survival Static Renewal 7 Day Chronic Pimephales promelas: 2 limits, 38 violations of any kind, 0 effluent exceedances.
- LOEC Sub-Lethal Reproduction Static Renewal 7 Day Chronic Ceriodaphnia dubia: 2 limits, 38 violations of any kind, 0 effluent exceedances.
- LOEC Sub-Lethal Reproduction Static Renewal 7 Day Chronic Pimephales promelas: 2 limits, 38 violations of any kind, 0 effluent exceedances.
- Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Pimephales promelas: 2 limits, 37 violations of any kind, 0 effluent exceedances.
- NOEC Lethal Static Renewal 7 Day Chronic Pimephales promelas: 2 limits, 37 violations of any kind, 0 effluent exceedances.
- NOEC Sub-Lethal Static Renewal 7 Day Chronic Pimephales promelas: 2 limits, 37 violations of any kind, 0 effluent exceedances.
- Arsenic, dry weight: 5 limits, 23 violations of any kind, 0 effluent exceedances.
- Chromium, sludge, total, dry weight [as Cr]: 5 limits, 23 violations of any kind, 0 effluent exceedances.
- Aluminum, total [as Al]: 3 limits, 15 violations of any kind, 0 effluent exceedances.
- Selenium, dry weight: 3 limits, 15 violations of any kind, 0 effluent exceedances.
- Copper, dry weight: 3 limits, 15 violations of any kind, 0 effluent exceedances.
- Cadmium, dry weight: 3 limits, 15 violations of any kind, 0 effluent exceedances.
- Molybdenum, sludge, total, dry weight [as Mo]: 3 limits, 15 violations of any kind, 0 effluent exceedances.
- Zinc, sludge, total, dry weight [as Zn]: 3 limits, 15 violations of any kind, 0 effluent exceedances.
- Lead, sludge, total, dry weight [as Pb]: 3 limits, 15 violations of any kind, 0 effluent exceedances.
- Nickel, sludge, total, dry weight [as Ni]: 3 limits, 15 violations of any kind, 0 effluent exceedances.
- Mercury, sludge, total, dry weight [as Hg]: 3 limits, 15 violations of any kind, 0 effluent exceedances.
- Whole effluent toxicity - retest #1: 3 limits, 10 violations of any kind, 0 effluent exceedances.
- Whole effluent toxicity - retest #2: 3 limits, 10 violations of any kind, 0 effluent exceedances.
- Level of pathogen requirements achieved: 2 limits, 9 violations of any kind, 0 effluent exceedances.
- Description of pathogen option used: 2 limits, 9 violations of any kind, 0 effluent exceedances.
- Vector attraction reduction alternative used: 2 limits, 9 violations of any kind, 0 effluent exceedances.
- Nickel, total [as Ni]: 2 limits, 8 violations of any kind, 0 effluent exceedances.
- LC50 Pass/Fail Static 24Hr Acute D. Pulex: 1 limit, 8 violations of any kind, 0 effluent exceedances.
- LC50 Pass/Fail Static 24Hr Acute Pimephales promelas: 1 limit, 8 violations of any kind, 0 effluent exceedances.
- Fecal coliform: 1 limit, 5 violations of any kind, 0 effluent exceedances.
- Salmonella: 1 limit, 5 violations of any kind, 0 effluent exceedances.
- Pollutant table from 503.13: 1 limit, 5 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.
- Boundary areas: 1 limit, 4 violations of any kind, 0 effluent exceedances.
- Compliance w/part 258 sludge requirement: 1 limit, 3 violations of any kind, 0 effluent exceedances.
- Annual whole sludge application rate: 1 limit, 0 violations of any kind, 0 effluent exceedances.
- August 21, 2026: Follow-Up (S).
- July 22, 2026: Under Review (State).
- June 2, 2026: CWA 309A AO For Compliance (EPA).
- May 26, 2026: Under Review (State).
- April 28, 2026: Under Review (State).
- March 16, 2026: Agency Enforcement Review (State).
- February 3, 2026: Phone Call/ EMAIL (State).
- August 6, 2020: Permit Violations - Violation Specified in Comment (ST6).
- August 1, 2019: Permit Violations - Violation Specified in Comment (ST6).
- May 8, 2017: Permit Violations - Violation Specified in Comment (ST6).
Texas holds 1,720 Publicly owned treatment works coverages of this permit type in EPA’s file; 1,336 were issued before TX0057622.
Coverages issued nearest TX0057622
- March 11, 2020: SISTER GROVE REGIONAL WATER RESOURCE RECOVERY FACILITY, New Hope, TX0138584, held by NORTH TEXAS MUNICIPAL WATER DISTRICT
- March 11, 2020: MONTGOMERY COUNTY MUD 144 WWTP, Conroe, TX0139301, held by MONTGOMERY COUNTY MUD NO 144
- March 12, 2020: CITY OF CUERO WWTP, Cuero, TX0024244, held by CUERO, CITY OF
- March 12, 2020: CITY OF LA VERNIA WWTP, La Vernia, TX0052850, held by LA VERNIA, CITY OF
- March 12, 2020: PETTUS MUD WWTP, Pettus, TX0054780, held by PETTUS MUD
- March 12, 2020: CITY OF EAGLE LAKE WWTP, Eagle Lake, TX0072885, held by EAGLE LAKE, CITY OF
- March 12, 2020: SINGING HILLS WWTP, Spring Branch, TX0133914, held by BULVERDE, CITY OF
- March 12, 2020: RIO VISTA WWTF, Rio Vista, TX0135411, held by RIO VISTA, CITY OF
- March 17, 2020: CITY OF SNOOK WWTP, Snook, TX0056189, held by SNOOK, CITY OF
- March 17, 2020: MUDDY CREEK REGIONAL WWTP, Wylie, TX0123561, held by NORTH TEXAS MUNICIPAL WATER DISTRICT
CITY OF ALAMO WWTP among its neighbors
EPA’s permit file holds 185 discharge permits in the Llano Grande Lake-Arroyo Colorado subwatershed (HUC 121102080100), TX0057622 among them. Its county holds 439, 16 of them major permits; TX0057622 is a major permit.
Other permits in the Llano Grande Lake-Arroyo Colorado subwatershed (HUC 121102080100)
- 365 TOLL PROJECT SEGMENT 1 & 2, Mcallen: TXR1594WP, minor permit, discharging to HIDALGO COUNTY DRAINAGE DISTRICT NO. 1, permit term to March 4, 2028
- AEP - DEL SOL TO FRONTERA ELECTRICAL T-LINE CONSTR, Palmview: TXR1571UC, minor permit, discharging to LOWER LAGUNA MADRE, permit term to March 4, 2028
- ALAMO CONCRETE PRODUCTS PLANT 89, Mission: TXG110940, minor permit, discharging to ARROYO COLORADO, permit term to November 7, 2021
- ALAMO METAL RECYCLING, Alamo: TXR05EZ37, minor permit, permit term to August 13, 2026
- ALAMO TRUCK SALES & USED PARTS, Alamo: TXR05FL19, minor permit, permit term to August 13, 2026
- ALTO BONITO SUBDIVISION, Weslaco: TXR1581TP, minor permit, discharging to ARROYO COLORADO ABOVE TIDAL, permit term to March 4, 2028
- AMERICAN USED AUTO PARTS, Alamo: TXR05GF71, minor permit, permit term to August 13, 2026
- AMERICAN USED AUTO PARTS, Alamo: TXR05HD02, minor permit, permit term to August 13, 2031
- AMIGASO JUNKYARD & AUTO SALVAGE, Alamo: TXR05FS43, minor permit, permit term to August 13, 2026
- ANACUA SENIOR VILLAGE, Mission: TXR1535VD, minor permit, discharging to DRAINAGE DITCHES FLOWING INTO ARROYO COLORADO ABOV, permit term to March 4, 2028
Identity
| Facility as filed | CITY OF ALAMO WWTP |
|---|---|
| Permittee as filed | ALAMO, CITY OF |
| NPDES ID | TX0057622 |
| 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 12, 2020 |
| Expiration date | March 12, 2025 |
| Address | Alamo, TX 78516 |
| Receiving water | Arroyo Colorado Above Tidal |
| Subwatershed | Llano Grande Lake-Arroyo Colorado (HUC 121102080100) |
Effluent limits and exceedances
- 56Pollutants on file
- 56Under a numeric limit
- 55With 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 |
|---|---|---|---|---|---|
| BOD, 5-day, 20 deg. C | 3 | 172 | 49 | March 31, 2023 | 70% over the limit |
| E. coli | 4 | 52 | 46 | March 31, 2026 | 535% over the limit |
| Solids, total suspended | 8 | 120 | 39 | October 31, 2024 | 41% over the limit |
| Nitrogen, ammonia total [as N] | 6 | 64 | 25 | April 30, 2026 | 600% over the limit |
| Chlorine, total residual | 2 | 11 | 7 | January 31, 2025 | 1,430% over the limit |
| Oxygen, dissolved [DO] | 1 | 31 | 2 | April 30, 2010 | 48% over the limit |
| pH | 3 | 57 | 1 | November 30, 2005 | |
| Flow, in conduit or thru treatment plant | 4 | 79 | 0 | ||
| Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Ceriodaphnia dubia | 2 | 41 | 0 | ||
| BOD, carbonaceous [5 day, 20 C] | 6 | 39 | 0 | ||
| NOEC Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia | 2 | 39 | 0 | ||
| NOEC Sub-Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia | 2 | 39 | 0 | ||
| Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia | 2 | 38 | 0 | ||
| Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Pinephales promelas | 2 | 38 | 0 | ||
| LOEC Lethal Survival Static Renewal 7 Day Chronic Ceriodaphnia dubia | 2 | 38 | 0 | ||
| LOEC Lethal Survival Static Renewal 7 Day Chronic Pimephales promelas | 2 | 38 | 0 | ||
| LOEC Sub-Lethal Reproduction Static Renewal 7 Day Chronic Ceriodaphnia dubia | 2 | 38 | 0 | ||
| LOEC Sub-Lethal Reproduction Static Renewal 7 Day Chronic Pimephales promelas | 2 | 38 | 0 | ||
| Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Pimephales promelas | 2 | 37 | 0 | ||
| NOEC Lethal Static Renewal 7 Day Chronic Pimephales promelas | 2 | 37 | 0 | ||
| NOEC Sub-Lethal Static Renewal 7 Day Chronic Pimephales promelas | 2 | 37 | 0 | ||
| Arsenic, dry weight | 5 | 23 | 0 | ||
| Chromium, sludge, total, dry weight [as Cr] | 5 | 23 | 0 | ||
| Aluminum, total [as Al] | 3 | 15 | 0 | ||
| Selenium, dry weight | 3 | 15 | 0 | ||
| Copper, dry weight | 3 | 15 | 0 | ||
| Cadmium, dry weight | 3 | 15 | 0 | ||
| Molybdenum, sludge, total, dry weight [as Mo] | 3 | 15 | 0 | ||
| Zinc, sludge, total, dry weight [as Zn] | 3 | 15 | 0 | ||
| Lead, sludge, total, dry weight [as Pb] | 3 | 15 | 0 | ||
| Nickel, sludge, total, dry weight [as Ni] | 3 | 15 | 0 | ||
| Mercury, sludge, total, dry weight [as Hg] | 3 | 15 | 0 | ||
| Whole effluent toxicity - retest #1 | 3 | 10 | 0 | ||
| Whole effluent toxicity - retest #2 | 3 | 10 | 0 | ||
| Level of pathogen requirements achieved | 2 | 9 | 0 | ||
| Description of pathogen option used | 2 | 9 | 0 | ||
| Vector attraction reduction alternative used | 2 | 9 | 0 | ||
| Nickel, total [as Ni] | 2 | 8 | 0 | ||
| LC50 Pass/Fail Static 24Hr Acute D. Pulex | 1 | 8 | 0 | ||
| LC50 Pass/Fail Static 24Hr Acute Pimephales promelas | 1 | 8 | 0 | ||
| Fecal coliform | 1 | 5 | 0 | ||
| Salmonella | 1 | 5 | 0 | ||
| Pollutant table from 503.13 | 1 | 5 | 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 | ||
| Boundary areas | 1 | 4 | 0 | ||
| Compliance w/part 258 sludge requirement | 1 | 3 | 0 | ||
| Annual whole sludge application rate | 1 | 0 | 0 |
Inspections, violations and enforcement
- 3Single-event violations
| Date | What EPA recorded | Agency |
|---|---|---|
| August 6, 2020 | Permit Violations - Violation Specified in Comment | ST6 |
| August 1, 2019 | Permit Violations - Violation Specified in Comment | ST6 |
| May 8, 2017 | Permit Violations - Violation Specified in Comment | ST6 |
Inspections
| Date | What EPA recorded | Agency |
|---|---|---|
| August 21, 2026 | Follow-Up | S |
Formal enforcement and penalties
1 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.
| Date | What EPA recorded | Agency | Federal penalty | State or local penalty |
|---|---|---|---|---|
| June 2, 2026 | CWA 309A AO For Compliance | EPA |
Informal enforcement
| Date | What EPA recorded | Agency |
|---|---|---|
| July 22, 2026 | Under Review | State |
| May 26, 2026 | Under Review | State |
| April 28, 2026 | Under Review | State |
| March 16, 2026 | Agency Enforcement Review | State |
| February 3, 2026 | Phone Call/ EMAIL | State |
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Figures from EPA’s ICIS-NPDES download, loaded September 15, 2026.