2026 Rankings

Worst ZIP Codes for Lead in Water in Iowa — 2026

Last updated: June 4, 2026

813 ZIP codes ranked by Lead (mg/L) #1: ZIP 50128 (Jamaica, IA) — 290.0 ppb
Lead Violations Lowest Score Safest Flood Risk Energy Cost Radon PFAS Reliability EJ Index Homebuyer Risk CO & Gas Safest Gas Remediation Burden Unresolved Violations (by Utility) Water Equity (by Utility)

Out of 813 ZIP codes with data in Iowa, these are the highest-ranked areas for lead (mg/l). See also: National Worst ZIP Codes for Lead in Water | All Iowa Rankings

Statistic Value
ZIP codes ranked 813
Highest value 290.0 ppb
Median value 2.0 ppb
State Iowa

Top 100 Worst ZIP Codes

Rank ZIP Code City State Lead (mg/L) Safety Score
1 50128 Jamaica IA 290.0 ppb 32/100
2 52642 Rome IA 24.0 ppb 33/100
3 52347 Victor IA 18.2 ppb 42/100
4 51462 Scranton IA 17.0 ppb 30/100
5 50133 Kellerton IA 15.0 ppb 30/100
6 50635 Gladbrook IA 14.8 ppb 34/100
7 50669 Reinbeck IA 14.8 ppb 34/100
8 50665 Parkersburg IA 14.6 ppb 41/100
9 52163 Protivin IA 14.2 ppb 36/100
10 50522 Burt IA 14.0 ppb 36/100
11 50539 Fenton IA 14.0 ppb 36/100
12 50650 Lamont IA 13.0 ppb 49/100
13 50246 Stanhope IA 12.0 ppb 42/100
14 50570 Ottosen IA 12.0 ppb 43/100
15 51543 Kimballton IA 12.0 ppb 40/100
16 50461 Osage IA 11.4 ppb 54/100
17 50586 Somers IA 11.0 ppb 44/100
18 52225 Elberon IA 10.8 ppb 47/100
19 50061 Cumming IA 10.0 ppb 58/100
20 50130 Jewell IA 10.0 ppb 48/100
21 50435 Floyd IA 10.0 ppb 58/100
22 50518 Barnum IA 10.0 ppb 50/100
23 52751 Grand Mound IA 10.0 ppb 58/100
24 52162 Postville IA 9.9 ppb 58/100
25 52208 Belle Plaine IA 9.8 ppb 44/100
26 52054 La Motte IA 9.6 ppb 59/100
27 52171 Waucoma IA 9.6 ppb 59/100
28 52101 Decorah IA 9.4 ppb 53/100
29 51532 Elliott IA 9.3 ppb 54/100
30 51243 Little Rock IA 9.1 ppb 60/100
31 50066 Dawson IA 9.0 ppb 45/100
32 50126 Iowa Falls IA 9.0 ppb 56/100
33 52759 Montpelier IA 9.0 ppb 53/100
34 52141 Elgin IA 8.5 ppb 56/100
35 51430 Arcadia IA 8.4 ppb 55/100
36 52302 Marion IA 8.3 ppb 57/100
37 50211 Norwalk IA 8.0 ppb 63/100
38 50460 Orchard IA 8.0 ppb 63/100
39 50591 Thor IA 8.0 ppb 54/100
40 50594 Vincent IA 8.0 ppb 54/100
41 51008 Brunsville IA 8.0 ppb 63/100
42 51401 Carroll IA 8.0 ppb 63/100
43 52251 Ladora IA 8.0 ppb 42/100
44 52337 Stanwood IA 8.0 ppb 56/100
45 51652 Sidney IA 7.9 ppb 59/100
46 50138 Knoxville IA 7.8 ppb 59/100
47 52531 Albia IA 7.7 ppb 57/100
48 50602 Allison IA 7.6 ppb 64/100
49 52158 Marquette IA 7.4 ppb 64/100
50 51025 Holstein IA 7.3 ppb 58/100
51 50644 Independence IA 7.1 ppb 50/100
52 52060 Maquoketa IA 7.1 ppb 65/100
53 50244 Slater IA 7.0 ppb 64/100
54 50543 Gowrie IA 7.0 ppb 59/100
55 50593 Varina IA 7.0 ppb 56/100
56 50645 Ionia IA 7.0 ppb 59/100
57 52333 Solon IA 7.0 ppb 63/100
58 52154 Lawler IA 6.9 ppb 64/100
59 51558 Moorhead IA 6.8 ppb 58/100
60 51646 New Market IA 6.8 ppb 60/100
61 52135 Clermont IA 6.8 ppb 66/100
62 51055 Sloan IA 6.6 ppb 61/100
63 50585 Sioux Rapids IA 6.5 ppb 56/100
64 50441 Hampton IA 6.2 ppb 62/100
65 50136 Keswick IA 6.0 ppb 63/100
66 50213 Osceola IA 6.0 ppb 56/100
67 50278 Zearing IA 6.0 ppb 65/100
68 50456 Manly IA 6.0 ppb 58/100
69 50458 Nora Springs IA 6.0 ppb 68/100
70 50480 Titonka IA 6.0 ppb 66/100
71 50525 Clarion IA 6.0 ppb 63/100
72 50526 Clarion IA 6.0 ppb 63/100
73 50558 Livermore IA 6.0 ppb 63/100
74 50563 Manson IA 6.0 ppb 61/100
75 52335 South English IA 6.0 ppb 63/100
76 52721 Bennett IA 6.0 ppb 63/100
77 52745 Dixon IA 6.0 ppb 68/100
78 52747 Durant IA 6.0 ppb 68/100
79 52778 Wilton IA 6.0 ppb 68/100
80 52249 Keystone IA 5.9 ppb 61/100
81 50171 Montezuma IA 5.8 ppb 63/100
82 52168 Spillville IA 5.8 ppb 68/100
83 52218 Coggon IA 5.8 ppb 66/100
84 50162 Melbourne IA 5.7 ppb 64/100
85 50009 Altoona IA 5.6 ppb 65/100
86 50249 Stratford IA 5.5 ppb 59/100
87 50636 Greene IA 5.5 ppb 59/100
88 52043 Elkader IA 5.4 ppb 59/100
89 52722 Bettendorf IA 5.4 ppb 43/100
90 50477 Swaledale IA 5.3 ppb 65/100
91 52768 Princeton IA 5.2 ppb 64/100
92 50054 Colfax IA 5.1 ppb 65/100
93 50628 Elma IA 5.1 ppb 70/100
94 52161 Ossian IA 5.1 ppb 66/100
95 52041 Earlville IA 5.0 ppb 66/100
96 50076 Exira IA 5.0 ppb 70/100
97 50105 Gilbert IA 5.0 ppb 70/100
98 50223 Pilot Mound IA 5.0 ppb 66/100
99 50423 Britt IA 5.0 ppb 62/100
100 50436 Forest City IA 5.0 ppb 68/100

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: 2026-06-04.

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.

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How this ranking is calculated, data sources, and limitations: Rankings Methodology →

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Disclaimer: Rankings are based on EPA, FEMA, and federal agency data. They reflect historical patterns and risk indicators, not necessarily current conditions. For the most current information, contact your local water utility or request a Consumer Confidence Report.

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