Lead Paint Risk in Orange County, California

57.4%Pre-1978 Housing

653,229Pre-1978 Units

1,138,473Total Housing Units

614Census 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

653,229 housing units in Orange County were built before 1978.
The county's pre-1978 housing share is 57.4%, 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 614 tracts; download the full county tract CSV.

Tract	Pre-1978	Total	Risk Rate	1970s	1960s	1950s	1940s	≤1939
Census Tract 884.01	1,508	1,508	100.0%	8	111	1,325	54	10
Census Tract 19.01	845	847	99.8%	90	130	559	60	6
Census Tract 1100.10	1,326	1,335	99.3%	469	717	140	0	0
Census Tract 996.04	1,334	1,348	99.0%	18	1,262	54	0	0
Census Tract 995.10	3,649	3,688	98.9%	137	3,063	312	45	92
Census Tract 992.46	1,109	1,126	98.5%	829	264	0	8	8
Census Tract 758.08	1,068	1,088	98.2%	101	599	335	0	33
Census Tract 1100.15	1,286	1,310	98.2%	217	588	406	75	0
Census Tract 638.02	1,100	1,123	98.0%	47	548	479	11	15
Census Tract 638.05	891	911	97.8%	346	439	105	1	0
Census Tract 747.02	1,223	1,250	97.8%	93	6	909	162	53
Census Tract 1101.14	1,434	1,466	97.8%	156	1,112	143	23	0
Census Tract 14.03	1,236	1,270	97.3%	104	619	494	0	19
Census Tract 320.30	1,192	1,225	97.3%	1,072	110	0	10	0
Census Tract 114.03	1,884	1,939	97.2%	177	521	440	233	513
Census Tract 115.03	573	590	97.1%	157	120	215	71	10
Census Tract 992.17	897	928	96.7%	242	619	13	6	17
Census Tract 992.26	1,228	1,270	96.7%	906	290	21	11	0
Census Tract 16.04	1,395	1,444	96.6%	313	647	435	0	0
Census Tract 741.08	917	950	96.5%	77	223	518	36	63
Census Tract 864.04	1,413	1,465	96.5%	314	241	759	99	0
Census Tract 525.02	1,871	1,941	96.4%	954	866	9	0	42
Census Tract 762.08	1,866	1,937	96.3%	456	1,187	201	8	14
Census Tract 992.38	1,292	1,342	96.3%	966	301	0	25	0
Census Tract 1103.03	1,494	1,551	96.3%	209	282	983	20	0
Census Tract 320.03	1,477	1,538	96.0%	380	1,083	14	0	0
Census Tract 863.05	1,114	1,160	96.0%	295	651	147	12	9
Census Tract 114.01	717	748	95.9%	49	254	256	33	125
Census Tract 114.02	984	1,026	95.9%	53	187	634	76	34
Census Tract 638.06	1,251	1,305	95.9%	222	531	422	76	0
Census Tract 891.07	1,341	1,400	95.8%	239	258	844	0	0
Census Tract 626.50	1,555	1,626	95.6%	461	1,064	30	0	0
Census Tract 117.09	1,343	1,408	95.4%	754	548	29	0	12
Census Tract 994.12	1,817	1,904	95.4%	873	781	138	7	18
Census Tract 740.05	1,606	1,688	95.1%	482	525	288	200	111
Census Tract 995.09	2,517	2,648	95.1%	93	2,078	289	37	20
Census Tract 639.04	1,268	1,335	95.0%	139	1,008	118	3	0
Census Tract 754.01	1,549	1,631	95.0%	287	219	583	187	273
Census Tract 758.10	949	1,001	94.8%	563	311	38	28	9
Census Tract 1103.04	1,196	1,262	94.8%	150	121	876	40	9
Census Tract 1100.05	1,097	1,160	94.6%	186	805	106	0	0
Census Tract 741.11	1,436	1,519	94.5%	631	527	204	27	47
Census Tract 524.16	1,285	1,361	94.4%	809	476	0	0	0
Census Tract 994.06	1,565	1,657	94.4%	414	1,045	86	20	0
Census Tract 1100.11	1,001	1,063	94.2%	912	89	0	0	0
Census Tract 626.29	819	870	94.1%	562	242	9	0	6
Census Tract 320.02	1,916	2,039	94.0%	1,301	600	0	15	0
Census Tract 752.01	1,123	1,197	93.8%	67	152	688	74	142
Census Tract 755.06	1,125	1,200	93.8%	236	605	269	0	15
Census Tract 994.07	828	883	93.8%	163	519	130	9	7
Census Tract 1103.02	1,614	1,720	93.8%	192	420	850	58	94
Census Tract 743	779	831	93.7%	165	102	196	166	150
Census Tract 748.06	959	1,024	93.7%	91	165	589	107	7
Census Tract 115.02	1,564	1,672	93.5%	167	393	975	21	8
Census Tract 1103.01	2,184	2,337	93.5%	726	890	537	0	31
Census Tract 749.02	1,266	1,355	93.4%	162	17	620	121	346
Census Tract 877.04	1,209	1,294	93.4%	275	438	496	0	0
Census Tract 524.11	1,316	1,410	93.3%	545	712	47	0	12
Census Tract 757.03	1,316	1,410	93.3%	183	412	691	30	0
Census Tract 992.15	2,037	2,185	93.2%	340	1,652	36	0	9
Census Tract 875.03	1,750	1,888	92.7%	422	178	1,106	9	35
Census Tract 992.37	1,077	1,162	92.7%	405	646	26	0	0
Census Tract 1100.08	1,715	1,850	92.7%	167	739	806	3	0
Census Tract 992.24	912	986	92.5%	442	421	25	0	24
Census Tract 762.06	1,727	1,870	92.4%	129	890	553	155	0
Census Tract 320.31	1,072	1,164	92.1%	1,072	0	0	0	0
Census Tract 882.02	962	1,045	92.1%	97	178	653	34	0
Census Tract 525.28	1,299	1,414	91.9%	1,268	31	0	0	0
Census Tract 742	1,580	1,719	91.9%	116	366	360	432	306
Census Tract 992.25	1,105	1,203	91.9%	443	542	104	16	0
Census Tract 1101.06	1,120	1,220	91.8%	224	843	33	12	8
Census Tract 880.01	1,147	1,251	91.7%	38	242	828	33	6
Census Tract 639.03	1,051	1,147	91.6%	167	784	100	0	0
Census Tract 754.05	922	1,007	91.6%	182	648	92	0	0
Census Tract 745.02	1,099	1,201	91.5%	211	278	516	67	27
Census Tract 758.07	1,149	1,256	91.5%	289	738	122	0	0
Census Tract 626.22	2,899	3,174	91.3%	937	1,650	279	16	17
Census Tract 19.02	752	825	91.2%	57	156	484	44	11
Census Tract 626.46	2,779	3,048	91.2%	362	2,196	171	50	0
Census Tract 11.01	1,379	1,514	91.1%	180	333	866	0	0
Census Tract 741.10	902	990	91.1%	729	95	34	10	34
Census Tract 884.02	1,193	1,310	91.1%	403	110	634	46	0
Census Tract 992.30	1,372	1,507	91.0%	597	752	23	0	0
Census Tract 1100.01	1,424	1,565	91.0%	346	644	434	0	0
Census Tract 1100.04	1,556	1,710	91.0%	229	1,267	60	0	0
Census Tract 757.01	2,099	2,309	90.9%	709	690	655	45	0
Census Tract 14.04	960	1,057	90.8%	173	94	301	193	199
Census Tract 758.05	1,268	1,397	90.8%	414	207	547	62	38
Census Tract 117.10	1,155	1,274	90.7%	478	640	27	0	10
Census Tract 762.05	1,448	1,597	90.7%	146	657	426	133	86
Census Tract 757.02	1,027	1,134	90.6%	118	359	510	30	10
Census Tract 626.48	2,150	2,375	90.5%	1,567	409	98	52	24
Census Tract 882.03	1,472	1,627	90.5%	332	374	727	17	22
Census Tract 999.06	1,610	1,780	90.4%	508	693	366	0	43
Census Tract 760.01	2,513	2,784	90.3%	859	333	983	170	168
Census Tract 875.05	1,181	1,308	90.3%	266	84	820	11	0
Census Tract 741.09	574	637	90.1%	142	158	224	0	50
Census Tract 992.44	1,675	1,859	90.1%	1,352	237	29	27	30
Census Tract 11.02	1,025	1,140	89.9%	157	254	614	0	0
Census Tract 525.06	824	918	89.8%	557	240	22	5	0