Bangor Naval Submarine Base

Location

Contaminants of concern

• 1,1-DICHLOROETHENE
• 1,2,4-TRIMETHYLBENZENE
• 1,2-DIBROMOETHANE
• 1,2-DICHLOROETHANE
• 1,3,5-TRINITROBENZENE
• 1,3-DINITROBENZENE
• 2,3,7,8-TETRACHLORODIBENZO-p-DIOXIN (TCDD)
• 2,4,6-TRINITROTOLUENE
• 2,4-DINITROTOLUENE
• 2,6-DINITROTOLUENE

Contaminated media

• Groundwater
• Soil

Cleanup timeline

1. Initial Assessment Completed — 11/02/1988
2. Proposed to the National Priorities List — 07/14/1989
3. Finalized on the National Priorities List — 08/30/1990
4. Remedial Investigation Started — 02/16/1990
5. Remedy Selected — 09/19/1991
6. Final Remedy Selected — 07/11/2014
7. Remedial Action Started — 02/04/1993
8. Construction Completed — 09/25/2001
9. Deleted from National Priorities List — Not Yet Achieved
10. Most Recent Five-Year Review — 09/29/2025

EPA references

• EPA facility record →
• EPA Superfund profile →

Other Superfund sites in Kitsap County

• Bremerton Gasworks — Bremerton
• Wyckoff Co Eagle Harbor — Bainbridge Island
• Naval Undersea Warfare Engineering Station 4 Waste Areas — Keyport
• Puget Sound Naval Shipyard Complex — Bremerton
• Jackson Park Housing Complex Usnavy — Kitsap County
• Bangor Ordnance Disposal Usnavy — Bremerton
• Old Navy Dump Manchester Laboratory Usepa Noaa — Manchester

EPA-regulated facilities nearby

• Pyramid Materials, Inc. — Silverdale · 3.9 mi · $2.0k penalties
• Us Navy Keyport Naval Undersea Warfare Center Div — Keyport · 4.2 mi · $4.5k penalties
• Preserve At Illahee Plat Pbd Sdap Dr Horton — Bremerton · 6.3 mi · $2.6k penalties
• Bremerton Ice Center — Bremerton · 9.4 mi · $5.0k penalties
• Ups Bremerton — Bremerton · 9.7 mi · $5.3M penalties

Understanding this Superfund site

Bangor Naval Submarine Base is a federal Superfund site in Washington. The Superfund program, created by Congress in 1980, addresses sites where hazardous substances have been released or threaten release into the environment. EPA scores potential sites using the Hazard Ranking System; those that score high enough are placed on the National Priorities List.

Current status: Construction complete. Physical construction of the cleanup remedy is complete, though long-term monitoring and institutional controls typically continue for years or decades. Groundwater treatment systems, for example, often run long after surface cleanup finishes.

EPA has identified 10 contaminants of concern at this site, including 1,1-dichloroethene, 1,2,4-trimethylbenzene, 1,2-dibromoethane. Contamination has been detected in groundwater, soil.

If you live near this site and have health concerns, your state health department can provide site-specific guidance. EPA maintains a community involvement program for most NPL sites, and site documents — including the Record of Decision, five-year reviews, and public health assessments — are typically available through EPA's Superfund site profile.