Lead Paint Risk in Contra Costa County, California

53.8%Pre-1978 Housing

229,489Pre-1978 Units

426,585Total Housing Units

242Census Tracts

How to Interpret This

This is an area-level screening signal based on Census housing-age data. It does not confirm lead paint in any specific home. Homes built before 1978 may contain lead-based paint, and certified inspection or testing is the only way to confirm a property-level hazard.

Reporter / Resident Story Kit

229,489 housing units in Contra Costa County were built before 1978.
The county's pre-1978 housing share is 53.8%, compared with the state rate of 56.7%.
Local questions: Which neighborhoods have the oldest housing stock? Are lead-safe renovation resources available? Do renters and families with young children know how to request testing?

Highest-Risk Census Tracts

Individual census tracts ranked by pre-1978 housing percentage. Showing the top 100 of 242 tracts; download the full county tract CSV.

Tract	Pre-1978	Total	Risk Rate	1970s	1960s	1950s	1940s	≤1939
Census Tract 3902	786	802	98.0%	21	22	167	259	317
Census Tract 3852	536	552	97.1%	57	71	340	37	31
Census Tract 3290	2,020	2,103	96.1%	430	630	425	463	72
Census Tract 3720	2,531	2,638	95.9%	16	79	965	1,161	310
Census Tract 3451.02	1,310	1,370	95.6%	826	445	21	7	11
Census Tract 3840	1,652	1,733	95.3%	130	139	819	341	223
Census Tract 3922.02	1,547	1,635	94.6%	94	855	458	96	44
Census Tract 3910	1,056	1,117	94.5%	42	77	247	278	412
Census Tract 3300	1,914	2,033	94.1%	33	433	1,265	165	18
Census Tract 3920	1,025	1,096	93.5%	47	75	281	169	453
Census Tract 3710	2,105	2,261	93.1%	44	210	478	984	389
Census Tract 3553.10	1,139	1,225	93.0%	350	560	208	0	21
Census Tract 3700	1,093	1,178	92.8%	13	79	486	232	283
Census Tract 3170	949	1,027	92.4%	76	85	101	115	572
Census Tract 3790	2,004	2,193	91.4%	227	511	487	406	373
Census Tract 3383.01	1,023	1,123	91.1%	283	606	134	0	0
Census Tract 3553.06	1,475	1,620	91.0%	1,057	224	135	0	59
Census Tract 3830	2,079	2,284	91.0%	269	338	460	714	298
Census Tract 3320	2,691	2,961	90.9%	418	1,013	1,133	114	13
Census Tract 3350	1,111	1,222	90.9%	99	150	497	316	49
Census Tract 3362.01	1,253	1,384	90.5%	243	248	451	292	19
Census Tract 3383.02	1,853	2,050	90.4%	512	608	574	14	145
Census Tract 3071.02	1,747	1,938	90.1%	338	226	425	668	90
Census Tract 3511.04	1,192	1,341	88.9%	241	834	74	0	43
Census Tract 3620	1,159	1,307	88.7%	53	120	542	388	56
Census Tract 3901	938	1,057	88.7%	38	140	296	235	229
Census Tract 3512	1,770	2,001	88.5%	177	647	667	146	133
Census Tract 3332	1,880	2,135	88.1%	339	1,007	389	86	59
Census Tract 3250	2,065	2,349	87.9%	431	376	632	626	0
Census Tract 3540.01	735	846	86.9%	49	141	273	162	110
Census Tract 3190.02	1,433	1,653	86.7%	311	218	284	295	325
Census Tract 3211.03	1,641	1,893	86.7%	577	564	371	68	61
Census Tract 3640.02	1,683	1,941	86.7%	169	969	491	22	32
Census Tract 3851	1,112	1,283	86.7%	193	152	492	176	99
Census Tract 3132.06	1,513	1,757	86.1%	744	127	432	210	0
Census Tract 3382.01	1,356	1,574	86.1%	599	558	164	0	35
Census Tract 3892	661	775	85.3%	259	218	47	106	31
Census Tract 3372.02	1,686	1,981	85.1%	827	705	154	0	0
Census Tract 3690.02	938	1,106	84.8%	158	305	227	126	122
Census Tract 3373	2,004	2,366	84.7%	592	1,312	49	51	0
Census Tract 3381.01	1,568	1,860	84.3%	582	448	531	7	0
Census Tract 3820	2,619	3,107	84.3%	307	1,167	396	476	273
Census Tract 3570	1,428	1,697	84.1%	88	125	58	134	1,023
Census Tract 3880	997	1,185	84.1%	110	9	229	437	212
Census Tract 3230	1,409	1,679	83.9%	157	181	731	310	30
Census Tract 3560.01	986	1,178	83.7%	960	15	11	0	0
Census Tract 3810	2,007	2,399	83.7%	214	232	658	745	158
Census Tract 3480	1,348	1,618	83.3%	177	220	462	364	125
Census Tract 3740	1,589	1,907	83.3%	104	182	370	564	369
Census Tract 3060.03	1,506	1,814	83.0%	299	203	423	521	60
Census Tract 3522.01	2,006	2,419	82.9%	577	847	510	0	72
Census Tract 3142	1,501	1,822	82.4%	469	462	455	77	38
Census Tract 3160	478	582	82.1%	81	14	76	21	286
Census Tract 3180	1,237	1,506	82.1%	153	247	260	152	425
Census Tract 3592.02	2,007	2,445	82.1%	755	671	527	51	3
Census Tract 3540.02	2,372	2,915	81.4%	677	442	679	377	197
Census Tract 3671	1,722	2,127	81.0%	573	349	668	132	0
Census Tract 3730	1,119	1,387	80.7%	102	96	102	722	97
Census Tract 3462.03	1,160	1,439	80.6%	736	242	82	100	0
Census Tract 3891	938	1,164	80.6%	150	138	263	246	141
Census Tract 3530.02	1,242	1,546	80.3%	140	380	410	221	91
Census Tract 3381.02	1,033	1,298	79.6%	315	552	153	0	13
Census Tract 3340.06	1,309	1,646	79.5%	1,138	71	100	0	0
Census Tract 3410	1,678	2,111	79.5%	290	167	659	513	49
Census Tract 3072.01	958	1,209	79.2%	309	479	160	0	10
Census Tract 3530.01	1,276	1,614	79.1%	151	298	465	307	55
Census Tract 3372.01	972	1,230	79.0%	349	368	220	35	0
Census Tract 3750	1,160	1,469	79.0%	164	202	100	221	473
Census Tract 3490	1,714	2,179	78.7%	503	353	514	292	52
Census Tract 3680.01	1,188	1,512	78.6%	128	158	401	259	242
Census Tract 3430.03	1,093	1,394	78.4%	231	289	383	190	0
Census Tract 3050	1,917	2,462	77.9%	302	587	291	416	321
Census Tract 3270.02	1,187	1,533	77.4%	548	88	380	104	67
Census Tract 3340.01	1,175	1,519	77.4%	241	285	544	92	13
Census Tract 3430.02	1,414	1,841	76.8%	547	361	383	123	0
Census Tract 3072.04	1,210	1,578	76.7%	476	645	54	35	0
Census Tract 3240.04	1,069	1,395	76.6%	170	360	509	30	0
Census Tract 3451.14	1,909	2,498	76.4%	1,615	283	0	0	11
Census Tract 3452.06	1,002	1,312	76.4%	903	41	58	0	0
Census Tract 3430.01	1,728	2,272	76.1%	497	363	731	103	34
Census Tract 3522.02	847	1,116	75.9%	484	217	94	3	49
Census Tract 3511.03	981	1,296	75.7%	564	340	52	16	9
Census Tract 3400.04	1,266	1,678	75.4%	173	206	361	492	34
Census Tract 3451.16	701	931	75.3%	677	0	24	0	0
Census Tract 3521.02	1,333	1,772	75.2%	412	760	151	0	10
Census Tract 3260	1,081	1,441	75.0%	65	368	380	222	46
Census Tract 3310	2,190	2,928	74.8%	428	511	800	304	147
Census Tract 3630	2,197	2,945	74.6%	894	230	595	400	78
Census Tract 3131.07	672	903	74.4%	506	114	52	0	0
Census Tract 3362.02	1,304	1,762	74.0%	384	352	427	50	91
Census Tract 3660.01	990	1,339	73.9%	164	266	427	75	58
Census Tract 3511.05	987	1,337	73.8%	155	677	129	10	16
Census Tract 3080.01	2,211	3,003	73.6%	1,384	220	484	110	13
Census Tract 3521.01	673	925	72.8%	350	216	83	13	11
Census Tract 3451.01	1,562	2,158	72.4%	659	882	21	0	0
Census Tract 3220	1,747	2,431	71.9%	186	600	762	144	55
Census Tract 3060.04	921	1,282	71.8%	371	217	326	0	7
Census Tract 3331.01	1,116	1,556	71.7%	216	490	288	108	14
Census Tract 3602	1,386	1,937	71.6%	249	280	723	85	49
Census Tract 3452.04	841	1,179	71.3%	202	231	245	109	54