Hidalgo County, TX
The federal environmental record for Hidalgo County (population 898,471): what is on file, where it is, and what remains open. Sources and retrieval dates are on the methodology page.
1
Superfund NPL sites
4
federal cleanup sites
14
PFAS-detecting water systems
9
TRI facilities
32
open tank releases
Superfund NPL sites
| Site | City | Status | Listed |
|---|---|---|---|
| Donna Reservoir and Canal System | Donna | on the NPL | 03/19/2008 |
Drinking water: PFAS testing
Public water systems serving Hidalgo with at least one PFAS detection under UCMR5. The federal limit for PFOA and PFOS is 4 ng/L; EPA proposed in May 2026 to rescind the limits for the other compounds, which are shown for information.
| System | Highest results | Reading |
|---|---|---|
| CITY OF DONNA TX1080002 | PFBA: 13.8 ng/L PFOS: 7.4 ng/L PFPeA: 4.5 ng/L | above final limit |
| CITY OF EDINBURG TX1080004 | PFBA: 6 ng/L PFOS: 4.5 ng/L PFBS: 3.4 ng/L | above final limit |
| CITY OF SAN JUAN TX1080010 | PFPeA: 9.2 ng/L PFHxA: 9 ng/L PFBA: 8.2 ng/L | above final limit |
| CITY OF WESLACO TX1080011 | PFHxA: 8.6 ng/L PFPeA: 8.4 ng/L PFBA: 7.6 ng/L | above final limit |
| SHARYLAND WSC TX1080033 | PFHxA: 12.5 ng/L PFPeA: 12.3 ng/L PFBA: 11.7 ng/L | above final limit |
| CITY OF ALAMO TX1080001 | PFBA: 6.3 ng/L PFHxA: 3.9 ng/L PFPeA: 3.5 ng/L | detected |
| CITY OF ELSA TX1080005 | PFBA: 15 ng/L PFHxA: 3 ng/L | detected |
| MCALLEN PUBLIC UTILITY TX1080006 | PFBA: 27.2 ng/L | detected |
| CITY OF MERCEDES TX1080007 | PFHxA: 3.3 ng/L | detected |
| CITY OF MISSION TX1080008 | PFBA: 7.3 ng/L | detected |
| CITY OF PHARR TX1080009 | PFBA: 11.2 ng/L | detected |
| AGUA SUD TX1080022 | PFBA: 11.9 ng/L PFPeA: 4.8 ng/L PFHxA: 4.6 ng/L | detected |
| NORTH ALAMO WSC TX1080029 | PFBA: 12.2 ng/L PFPeA: 3.8 ng/L PFHxA: 3.5 ng/L | detected |
| HIDALGO COUNTY MUD 1 TX1080088 | PFBA: 6.2 ng/L PFPeA: 4 ng/L PFHxA: 4 ng/L | detected |
On a system with detections? Testing and treatment options
Facilities reporting toxic releases (2024)
9 facilities in Hidalgo filed TRI reports for 2024, totalling 71k lb released.
| Facility | City | Top chemicals | Total released |
|---|---|---|---|
| GLECO PLATING INC. | MCALLEN | Sodium dimethyldithiocarbamate, Zinc compounds | 45k lb |
| THE PICTSWEET CO - MONTE ALTO TX PLANT | MONTE ALTO | Ammonia | 17k lb |
| GE ENGINE SERVICES MCALLEN LP | MCALLEN | Nitrate compounds (water dissociable; reportable only when in aqueous solution), Nickel | 7k lb |
| EVOLVE FURNITURE LLC | WESLACO | Styrene | 2k lb |
| REGAL REXNORD CORP | MCALLEN | Aluminum (fume or dust) | 488 lb |
| STEEL TECHNOLOGIEA LLC | MISSION | - | 0 lb |
| GRAND RAPIDS FOAM - SOUTH TEXAS INC. | MCALLEN | - | 0 lb |
| CEMEX CONSTRUCTION MATERIALS SOUTH LLC- MISSION | MISSION | - | 0 lb |
| CEMEX CONSTRUCTION MATERIALS SOUTH LLC - EDINBURG | EDINBURG | - | 0 lb |
Underground fuel tanks
EPA's UST Finder records 1,163 tank facilities in Hidalgo: 756 tanks in service and 1,967 closed. 541 fuel releases are on record, of which 32 remain open. Open releases are cleanups that have not reached "no further action".
Radon
EPA maps Hidalgo as Zone 3, the lowest predicted indoor radon (under 2 pCi/L average). Radon and air quality are covered in depth on lung.com.
The record for one specific address
County figures blur what matters: distance. The Address Environmental Report runs these same federal datasets against one address and reports every site, tank, polluter and water result around it, with distances, in about a minute.
Get the report - $39All federal cleanup sites on file
The wider Superfund enterprise inventory (SEMS) for Hidalgo, including sites assessed but never listed. Presence here records that EPA had reason to look, not a finding of danger.
- DONNA RESERVOIR AND CANAL SYSTEMDONNA
- HELENA CHEMICAL CO (HAYES SAMON)MISSION
- HONEY BEE RESEARCH UNITWESLACO
- US DEPARTMENT OF AGRICULTUREWESLACO