Worst ZIP Codes for Lead in Water

Out of 16,988 ZIP codes with data across all 50 states, these are the highest-ranked areas for lead (ppb). Each ZIP links to a full safety report with water quality, lead, radon, and flood data.

Statistic	Value
ZIP codes ranked	16,988
Highest value	984.0 ppb
Median value	2.1 ppb

Top 100 Worst ZIP Codes

Rank	ZIP Code	City	State	Lead (ppb)	Safety Score
1	72662	Omaha	AR	984.0 ppb	—
2	17756	Muncy	PA	890.0 ppb	50/100
3	45315	Clayton	OH	470.0 ppb	49/100
4	45402	Dayton	OH	470.0 ppb	50/100
5	45403	Dayton	OH	470.0 ppb	50/100
6	45404	Dayton	OH	470.0 ppb	50/100
7	45405	Dayton	OH	470.0 ppb	50/100
8	45406	Dayton	OH	470.0 ppb	50/100
9	45409	Dayton	OH	470.0 ppb	50/100
10	45410	Dayton	OH	470.0 ppb	50/100
11	45414	Dayton	OH	470.0 ppb	50/100
12	45416	Dayton	OH	470.0 ppb	50/100
13	45417	Dayton	OH	470.0 ppb	46/100
14	45419	Dayton	OH	470.0 ppb	50/100
15	45420	Dayton	OH	470.0 ppb	50/100
16	45424	Dayton	OH	470.0 ppb	49/100
17	45428	Dayton	OH	470.0 ppb	50/100
18	45431	Dayton	OH	470.0 ppb	49/100
19	45432	Dayton	OH	470.0 ppb	49/100
20	45469	Dayton	OH	470.0 ppb	—
21	72721	Combs	AR	370.0 ppb	—
22	72947	Mulberry	AR	370.0 ppb	—
23	17020	Duncannon	PA	301.0 ppb	—
24	03809	Alton	NH	210.0 ppb	—
25	03810	Alton Bay	NH	210.0 ppb	—
26	18302	East Stroudsburg	PA	184.0 ppb	—
27	18355	Scotrun	PA	122.8 ppb	58/100
28	03048	Greenville	NH	110.0 ppb	—
29	65739	Ridgedale	MO	103.5 ppb	—
30	94130	San Francisco	CA	100.0 ppb	—
31	60040	Highwood	IL	76.0 ppb	81/100
32	49111	Eau Claire	MI	71.0 ppb	—
33	46741	Grabill	IN	58.6 ppb	—
34	46743	Harlan	IN	58.6 ppb	—
35	46788	Spencerville	IN	58.6 ppb	—
36	12569	Pleasant Valley	NY	49.0 ppb	—
37	61752	Le Roy	IL	49.0 ppb	58/100
38	84335	Smithfield	UT	46.0 ppb	67/100
39	15848	Luthersburg	PA	43.7 ppb	—
40	15849	Penfield	PA	43.7 ppb	—
41	15856	Rockton	PA	43.7 ppb	—
42	16828	Centre Hall	PA	43.3 ppb	50/100
43	16875	Spring Mills	PA	43.3 ppb	—
44	03869	Rollinsford	NH	43.0 ppb	—
45	14052	East Aurora	NY	42.0 ppb	66/100
46	14139	South Wales	NY	42.0 ppb	67/100
47	59072	Roundup	MT	41.0 ppb	—
48	71961	Oden	AR	40.0 ppb	—
49	36726	Camden	AL	38.0 ppb	—
50	36768	Pine Apple	AL	38.0 ppb	—
51	03223	Campton	NH	37.0 ppb	—
52	28338	Ellerbe	NC	37.0 ppb	73/100
53	53565	Mineral Point	WI	37.0 ppb	—
54	49330	Kent City	MI	36.1 ppb	—
55	13357	Ilion	NY	36.0 ppb	—
56	72112	Newport	AR	36.0 ppb	—
57	72431	Grubbs	AR	36.0 ppb	—
58	72473	Tuckerman	AR	36.0 ppb	95/100
59	72479	Weiner	AR	36.0 ppb	—
60	36344	Hartford	AL	35.0 ppb	—
61	36375	Slocomb	AL	35.0 ppb	—
62	48821	Dimondale	MI	34.0 ppb	—
63	15001	Aliquippa	PA	33.5 ppb	52/100
64	15050	Hookstown	PA	33.5 ppb	—
65	18623	Laceyville	PA	32.3 ppb	—
66	18630	Meshoppen	PA	32.3 ppb	61/100
67	55746	Hibbing	MN	32.0 ppb	80/100
68	24101	Hardy	VA	31.0 ppb	—
69	49740	Harbor Springs	MI	30.0 ppb	—
70	60441	Lockport	IL	30.0 ppb	69/100
71	17737	Hughesville	PA	29.6 ppb	—
72	17762	Picture Rocks	PA	29.6 ppb	—
73	12496	Windham	NY	26.0 ppb	—
74	39179	Vaughan	MS	24.6 ppb	—
75	16746	Roulette	PA	24.5 ppb	—
76	72069	Holly Grove	AR	24.0 ppb	—
77	19958	Lewes	DE	23.0 ppb	83/100
78	19968	Milton	DE	23.0 ppb	83/100
79	29073	Lexington	SC	23.0 ppb	—
80	98577	Raymond	WA	23.0 ppb	100/100
81	98586	South Bend	WA	23.0 ppb	100/100
82	15104	Braddock	PA	22.6 ppb	53/100
83	17922	Auburn	PA	22.5 ppb	—
84	73010	Blanchard	OK	22.5 ppb	83/100
85	73065	Newcastle	OK	22.5 ppb	92/100
86	76821	Ballinger	TX	22.3 ppb	—
87	76837	Eden	TX	22.3 ppb	—
88	76852	Lohn	TX	22.3 ppb	—
89	76858	Melvin	TX	22.3 ppb	—
90	76861	Miles	TX	22.3 ppb	—
91	76862	Millersview	TX	22.3 ppb	—
92	76866	Paint Rock	TX	22.3 ppb	—
93	76872	Rochelle	TX	22.3 ppb	—
94	76875	Rowena	TX	22.3 ppb	—
95	76933	Bronte	TX	22.3 ppb	—
96	76945	Robert Lee	TX	22.3 ppb	—
97	76955	Vancourt	TX	22.3 ppb	—
98	86429	Bullhead City	AZ	22.0 ppb	50/100
99	99016	Greenacres	WA	20.8 ppb	61/100

Rankings by State

State	ZIP Codes Ranked
New York	1,198
Texas	1,179
Florida	902
Pennsylvania	813
Missouri	719
Ohio	597
Tennessee	590
California	576
Illinois	552
Michigan	497
Georgia	492
New Jersey	457
Indiana	453
Wisconsin	440
Oklahoma	418
Arkansas	407
Kansas	398
Massachusetts	394
Alabama	362
West Virginia	356
Mississippi	353
Kentucky	333
Minnesota	330
Louisiana	321
Iowa	319
Washington	315
Virginia	309
South Dakota	283
Colorado	269
South Carolina	264
Oregon	192
Utah	190
Arizona	178
Maryland	166
Maine	161
Nebraska	142
North Dakota	137
North Carolina	134
Vermont	127
New Mexico	114
Idaho	86
Nevada	83
Connecticut	81
Montana	62
Rhode Island	60
New Hampshire	44
Wyoming	42
Delaware	41
District of Columbia	36
Hawaii	12
Alaska	4

Methodology

Lead rankings are based on the 90th percentile lead testing value (PB90) reported by water systems under the Lead and Copper Rule. When CCR data is unavailable, EPA SDWIS lead sampling data is used. The EPA action level for lead is 15 ppb (0.015 mg/L). There is no safe level of lead exposure.

Data sources: EPA Safe Drinking Water Information System (SDWIS), FEMA National Flood Insurance Program, EPA radon zone maps, EIA electricity rates, and Consumer Confidence Reports. Last updated: 2026-10-14.

Frequently Asked Questions

What is a dangerous lead level in water?

The EPA action level is 15 parts per billion (ppb). The American Academy of Pediatrics recommends no more than 1 ppb for school drinking water. There is no safe level of lead exposure for children.

How is lead measured in water?

Water systems collect samples from homes with known lead service lines or lead solder. The 90th percentile value (PB90) means 90% of samples tested below that level. If PB90 exceeds 15 ppb, the system must take corrective action.

Worst ZIP Codes for Lead in Water — 2026 Rankings