Underground storage tanks in Washington

EPA UST Finder county aggregates for Washington — registered tank facilities and leak (LUST) incidents as reported by the state program to EPA.

16,732registered facilities

8,601open tanks

39,919closed tanks

2,983leak incidents

2,730cleanups still open

By county

County	Facilities	Open tanks	Closed tanks	Leak incidents	Open cleanups
King	3,932	2,118	10,413	1,088	1,041
Pierce	1,606	859	3,904	306	280
Spokane	1,189	503	2,806	90	55
Snohomish	1,163	805	2,767	251	236
Yakima	826	344	1,924	161	110
Clark	641	444	1,371	78	73
Whatcom	551	334	1,192	125	118
Thurston	531	343	1,157	71	64
Grant	472	188	1,082	18	18
Kitsap	452	264	1,064	93	85
Skagit	392	202	884	84	83
Benton	378	221	1,051	33	33
Lewis	365	195	815	88	86
Grays Harbor	358	145	795	73	68
Cowlitz	356	206	797	58	55
Chelan	326	139	750	13	13
Franklin	311	143	698	10	9
Whitman	307	56	611	28	28
Clallam	284	148	688	45	39
Walla Walla	276	102	629	16	16
Okanogan	193	92	417	20	10
Adams	191	71	428	11	10
Kittitas	189	98	427	40	38
Lincoln	188	15	374	9	7
Mason	179	106	397	32	27
Stevens	160	57	406	20	16
Jefferson	124	58	295	25	25
Island	115	65	265	18	18
Klickitat	108	43	250	19	16
Pacific	93	44	225	25	25
Douglas	92	43	217	4	4
Asotin	66	19	146	3	3
Pend Oreille	60	25	118	4	4
Ferry	56	13	131	9	2
Skamania	55	15	122	3	3
San Juan	53	49	99	9	9
Columbia	43	14	108	1	1
Garfield	35	8	64	1	1
Wahkiakum	16	7	32	1	1

Screen a specific property in Washington

County numbers set the context; a deal needs the registry around one address — registered tanks at the parcel, facilities within 500/1,500 ft, leak cleanups with status and distance, every line cited to the official record.

Screen an address — $49

This is a screen of EPA-registered tank and leak records, not an environmental site assessment. State registries are incomplete by design: tanks removed before 1986 and most residential heating-oil tanks were never registered, so a clean screen cannot prove the absence of a tank. "Closed" means a tank was taken out of service per the registry — it does not certify that no contamination remains.

source: EPA UST Finder EPA data vintage 2024-12-04