Navajo County, AZ
The federal environmental record for Navajo County (population 109,175): 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
2
PFAS-detecting water systems
2
TRI facilities
69
open tank releases
Drinking water: PFAS testing
Public water systems serving Navajo 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 |
|---|---|---|
| ARIZONA WATER CO - LAKESIDE AZ0409003 | PFBS: 3.4 ng/L | detected |
| PONDEROSA DWID AZ0409023 | PFHxA: 12.8 ng/L PFBS: 12.1 ng/L PFPeA: 4.1 ng/L | detected |
On a system with detections? Testing and treatment options
Facilities reporting toxic releases (2024)
2 facilities in Navajo filed TRI reports for 2024, totalling 64k lb released.
| Facility | City | Top chemicals | Total released |
|---|---|---|---|
| CHOLLA POWER PLANT | JOSEPH CITY | Barium And Barium Compounds, Manganese And Manganese Compounds | 64k lb |
| RHINEHART OIL CO. HOLBROOK BULK PLANT | HOLBROOK | - | 0 lb |
Underground fuel tanks
EPA's UST Finder records 381 tank facilities in Navajo: 212 tanks in service and 874 closed. 383 fuel releases are on record, of which 69 remain open. Open releases are cleanups that have not reached "no further action".
Radon
EPA maps Navajo as Zone 2, moderate predicted indoor radon (2 to 4 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