Lead Paint Risk in Middlesex County, Massachusetts

69.1%Pre-1978 Housing

456,333Pre-1978 Units

660,814Total Housing Units

357Census 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

456,333 housing units in Middlesex County were built before 1978.
The county's pre-1978 housing share is 69.1%, compared with the state rate of 68.2%.
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 357 tracts; download the full county tract CSV.

Tract	Pre-1978	Total	Risk Rate	1970s	1960s	1950s	1940s	≤1939
Census Tract 3574	889	909	97.8%	0	18	43	55	773
Census Tract 3506	1,049	1,092	96.1%	55	73	55	45	821
Census Tract 3572	1,199	1,253	95.7%	34	120	110	123	812
Census Tract 3394	1,452	1,521	95.5%	75	79	111	164	1,023
Census Tract 3702.02	1,701	1,795	94.8%	10	47	207	73	1,364
Census Tract 3573	1,303	1,376	94.7%	63	76	292	108	764
Census Tract 3565	2,972	3,145	94.5%	377	553	721	298	1,023
Census Tract 3391.02	1,196	1,267	94.4%	84	93	224	126	669
Census Tract 3342	1,623	1,730	93.8%	98	178	150	121	1,076
Census Tract 3423.01	1,081	1,155	93.6%	0	0	76	150	855
Census Tract 3541	1,226	1,312	93.4%	78	169	37	29	913
Census Tract 3703.01	1,908	2,048	93.2%	146	284	144	213	1,121
Census Tract 3505	773	833	92.8%	71	60	59	38	545
Census Tract 3745	1,677	1,807	92.8%	85	163	237	151	1,041
Census Tract 3501.07	445	480	92.7%	98	37	4	29	277
Census Tract 3511.02	1,022	1,104	92.6%	113	46	0	41	822
Census Tract 3575	908	981	92.6%	17	5	91	44	751
Census Tract 3101.02	1,328	1,436	92.5%	397	55	53	33	790
Census Tract 3362.01	1,134	1,227	92.4%	10	143	284	41	656
Census Tract 3544	745	807	92.3%	19	20	56	67	583
Census Tract 3702.01	1,704	1,847	92.3%	106	35	35	41	1,487
Census Tract 3392	2,161	2,346	92.1%	136	93	445	169	1,318
Census Tract 3576	1,030	1,118	92.1%	64	17	31	128	790
Census Tract 3397	1,742	1,896	91.9%	69	41	361	60	1,211
Census Tract 3545	868	944	91.9%	16	16	60	97	679
Census Tract 3504	2,313	2,520	91.8%	38	114	60	147	1,954
Census Tract 3540	2,198	2,394	91.8%	187	203	63	31	1,714
Census Tract 3393	1,119	1,220	91.7%	185	102	118	67	647
Census Tract 3361	2,526	2,758	91.6%	277	81	110	151	1,907
Census Tract 3536	1,742	1,905	91.4%	20	131	34	108	1,449
Census Tract 3537	1,722	1,888	91.2%	146	92	137	139	1,208
Census Tract 3561	1,333	1,462	91.2%	82	60	101	89	1,001
Census Tract 3423.02	1,213	1,333	91.0%	32	128	176	51	826
Census Tract 3363	2,377	2,615	90.9%	60	115	563	145	1,494
Census Tract 3567.04	1,522	1,675	90.9%	239	125	106	109	943
Census Tract 3510.02	1,184	1,304	90.8%	113	115	118	101	737
Census Tract 3737	1,331	1,468	90.7%	0	11	118	68	1,134
Census Tract 3743	1,158	1,282	90.3%	25	6	186	180	761
Census Tract 3567.01	2,863	3,192	89.7%	582	260	165	84	1,772
Census Tract 3113	1,289	1,438	89.6%	157	9	125	33	965
Census Tract 3421.02	1,521	1,699	89.5%	248	427	219	85	542
Census Tract 3507.01	1,447	1,619	89.4%	132	17	120	104	1,074
Census Tract 3746	1,928	2,163	89.1%	56	217	253	317	1,085
Census Tract 3398.04	968	1,088	89.0%	21	135	128	31	653
Census Tract 3415	1,663	1,869	89.0%	86	115	116	28	1,318
Census Tract 3686	2,268	2,552	88.9%	143	168	289	138	1,530
Census Tract 3831.01	1,103	1,241	88.9%	261	286	47	21	488
Census Tract 3502.02	1,564	1,764	88.7%	72	162	71	130	1,129
Census Tract 3411.01	1,367	1,543	88.6%	31	38	88	47	1,163
Census Tract 3364.04	966	1,091	88.5%	151	114	162	9	530
Census Tract 3543	1,466	1,657	88.5%	305	36	107	97	921
Census Tract 3731	1,840	2,078	88.5%	60	113	47	10	1,610
Census Tract 3735	1,787	2,023	88.3%	98	22	241	141	1,285
Census Tract 3120	882	1,006	87.7%	26	56	177	7	616
Census Tract 3125.01	1,654	1,889	87.6%	285	321	437	135	476
Census Tract 3839.03	809	923	87.6%	116	126	402	142	23
Census Tract 3172.02	1,167	1,333	87.5%	117	535	342	12	161
Census Tract 3417	1,976	2,257	87.5%	122	18	89	240	1,507
Census Tract 3837	1,840	2,102	87.5%	115	494	815	146	270
Census Tract 3213.01	1,885	2,158	87.3%	77	306	221	44	1,237
Census Tract 3399	1,958	2,242	87.3%	231	152	137	80	1,358
Census Tract 3501.08	1,583	1,813	87.3%	143	117	161	80	1,082
Census Tract 3395	1,586	1,820	87.1%	70	77	152	102	1,185
Census Tract 3509	1,555	1,789	86.9%	44	45	64	138	1,264
Census Tract 3381	988	1,140	86.7%	86	121	177	36	568
Census Tract 3501.05	471	543	86.7%	19	26	3	67	356
Census Tract 3172.01	780	901	86.6%	129	500	94	0	57
Census Tract 3414	2,373	2,746	86.4%	129	388	218	379	1,259
Census Tract 3425.02	995	1,151	86.4%	82	4	62	9	838
Census Tract 3738	2,180	2,526	86.3%	470	127	221	139	1,223
Census Tract 3511.01	1,384	1,607	86.1%	45	88	41	139	1,071
Census Tract 3104	1,061	1,234	86.0%	20	56	196	48	741
Census Tract 3422.02	1,328	1,544	86.0%	56	83	111	146	932
Census Tract 3566.01	1,840	2,139	86.0%	246	240	146	90	1,118
Census Tract 3733	1,152	1,339	86.0%	151	38	80	153	730
Census Tract 3834.02	1,221	1,422	85.9%	79	87	528	35	492
Census Tract 3513	1,881	2,193	85.8%	170	70	275	57	1,309
Census Tract 3527	890	1,037	85.8%	105	15	117	64	589
Census Tract 3115	985	1,149	85.7%	22	75	59	23	806
Census Tract 3567.03	1,327	1,548	85.7%	282	96	78	93	778
Census Tract 3736	944	1,102	85.7%	48	12	89	135	660
Census Tract 3872.01	2,010	2,345	85.7%	401	588	434	60	527
Census Tract 3362.02	1,118	1,306	85.6%	86	31	195	118	688
Census Tract 3564	2,543	2,972	85.6%	275	340	760	245	923
Census Tract 3538	2,249	2,631	85.5%	686	136	52	114	1,261
Census Tract 3385	1,639	1,919	85.4%	85	135	226	261	932
Census Tract 3124	896	1,050	85.3%	83	91	221	95	406
Census Tract 3364.02	1,766	2,072	85.2%	74	229	217	157	1,089
Census Tract 3172.03	1,245	1,469	84.8%	176	268	419	83	299
Census Tract 3566.02	1,602	1,894	84.6%	16	83	147	99	1,257
Census Tract 3372.01	1,241	1,470	84.4%	165	498	329	45	204
Census Tract 3542	1,315	1,559	84.3%	31	127	7	66	1,084
Census Tract 3418	2,422	2,877	84.2%	131	281	52	127	1,831
Census Tract 3412	2,387	2,839	84.1%	98	233	228	117	1,711
Census Tract 3533	1,671	1,989	84.0%	69	70	91	23	1,418
Census Tract 3578	1,144	1,362	84.0%	33	102	238	198	573
Census Tract 3529	1,209	1,446	83.6%	71	0	30	90	1,018
Census Tract 3691	1,760	2,106	83.6%	167	251	466	329	547
Census Tract 3704.02	590	706	83.6%	52	66	64	18	390
Census Tract 3530	1,337	1,602	83.5%	334	170	68	30	735