Starr County, TX
The federal environmental record for Starr County (population 65,934): what is on file, where it is, and what remains open. Sources and retrieval dates are on the methodology page.
0
Superfund NPL sites
0
federal cleanup sites
5
PFAS-detecting water systems
0
TRI facilities
0
open tank releases
Drinking water: PFAS testing
Public water systems serving Starr 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 |
|---|---|---|
| UNION WSC TX2140004 | PFBA: 7.1 ng/L PFPeA: 6.9 ng/L PFHxA: 6.1 ng/L | detected |
| CITY OF LA GRULLA TX2140006 | PFBA: 11 ng/L PFPeA: 5.8 ng/L PFHxA: 5.4 ng/L | detected |
| CITY OF ROMA TX2140007 | PFBA: 7.2 ng/L | detected |
| RIO WSC TX2140016 | PFBA: 7.7 ng/L | detected |
| CITY OF RIO GRANDE CITY TX2140018 | PFBA: 6.1 ng/L | detected |
On a system with detections? Testing and treatment options
Underground fuel tanks
EPA's UST Finder records 158 tank facilities in Starr: 104 tanks in service and 220 closed. 28 fuel releases are on record, of which 0 remain open. Open releases are cleanups that have not reached "no further action".
Radon
EPA maps Starr 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 - $39