Underground storage tanks in California

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

13,588registered facilities

37,630open tanks

143closed tanks

41,677leak incidents

2,260cleanups still open

By county

County	Facilities	Open tanks	Closed tanks	Leak incidents	Open cleanups
Los Angeles	3,148	8,546	—	7,499	522
San Diego	996	2,858	8	3,079	101
Orange	938	2,513	—	3,016	201
San Bernardino	832	2,368	30	1,081	43
Riverside	704	1,984	48	1,358	79
Santa Clara	614	1,627	—	2,635	67
Alameda	552	1,503	—	2,540	268
Sacramento	474	1,301	—	1,232	72
Kern	434	1,305	—	905	16
Contra Costa	378	1,005	—	903	59
Fresno	371	1,039	—	890	43
Tulare	270	721	3	503	27
San Joaquin	266	731	—	913	73
Ventura	261	769	—	1,369	17
San Mateo	254	687	—	1,338	70
San Francisco	233	502	—	2,167	53
Monterey	219	562	—	415	32
Stanislaus	208	622	—	465	12
Solano	178	490	—	535	20
Sonoma	166	488	—	1,204	101
Santa Barbara	145	411	—	656	29
Placer	140	409	—	456	11
San Luis Obispo	128	363	—	275	3
Shasta	119	375	0	354	14
Merced	113	333	—	349	35
Santa Cruz	104	262	—	366	15
Butte	101	298	0	289	7
Yolo	97	294	2	290	14
Imperial	89	260	3	233	25
Humboldt	87	229	32	628	31
Marin	87	225	—	367	16
Kings	86	245	0	158	9
El Dorado	81	225	12	197	12
Madera	76	214	0	219	8
Mendocino	62	165	2	424	44
Napa	44	133	—	343	12
Sutter	42	129	—	107	4
Yuba	41	132	—	114	11
Tehama	40	133	0	148	2
Mariposa	37	71	—	98	6
Nevada	36	99	—	224	7
Calaveras	32	88	—	129	4
Lake	32	95	0	99	4
Siskiyou	32	111	—	199	7
Tuolumne	31	81	—	132	13
Inyo	29	101	3	109	6
Amador	28	81	0	71	3
San Benito	23	57	—	55	—
Mono	21	63	—	68	—
Plumas	20	60	—	76	5
Colusa	18	50	—	57	2
Glenn	17	55	—	53	3
Del Norte	15	46	0	116	5
Lassen	15	47	0	46	8
Modoc	9	29	0	16	3
Trinity	6	20	—	77	4
Sierra	5	13	—	16	2
Alpine	4	7	—	16	—

Screen a specific property in California

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