Island County, WA
The federal environmental record for Island County (population 86,267): what is on file, where it is, and what remains open. Sources and retrieval dates are on the methodology page.
2
Superfund NPL sites
4
federal cleanup sites
1
PFAS-detecting water systems
2
TRI facilities
18
open tank releases
Superfund NPL sites
| Site | City | Status | Listed |
|---|---|---|---|
| Naval Air Station, Whidbey Island (Ault Field) | Whidbey Island | on the NPL | 02/21/1990 |
| Naval Air Station, Whidbey Island (Seaplane Base) | Whidbey Island | deleted | 02/21/1990 |
Drinking water: PFAS testing
Public water systems serving Island 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 |
|---|---|---|
| COUPEVILLE TOWN OF WA5315550 | PFHxA: 17 ng/L PFPeA: 12 ng/L PFOA: 9.8 ng/L | above final limit |
On a system with detections? Testing and treatment options
Facilities reporting toxic releases (2024)
2 facilities in Island filed TRI reports for 2024, totalling 3k lb released.
| Facility | City | Top chemicals | Total released |
|---|---|---|---|
| US NAVY NAS WHIDBEY ISLAND AULT FIELD | OAK HARBOR | Lead | 3k lb |
| TECHNICAL SERVICES INC | OAK HARBOR | - | 0 lb |
Underground fuel tanks
EPA's UST Finder records 115 tank facilities in Island: 65 tanks in service and 265 closed. 18 fuel releases are on record, of which 18 remain open. Open releases are cleanups that have not reached "no further action".
Radon
EPA maps Island 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 Island, including sites assessed but never listed. Presence here records that EPA had reason to look, not a finding of danger.
- FORT CASEY MILITARY RESERVATION - FUDS SITECOUPEVILLE
- NAVAL AIR STATION, WHIDBEY ISLAND (AULT FIELD)WHIDBEY ISLAND
- NAVAL AIR STATION, WHIDBEY ISLAND (SEAPLANE BASE)WHIDBEY ISLAND
- USNAVY WHIDBEY ISLAND NAVAL AIR STAOAK HARBOR