2026 Rankings

Worst ZIP Codes for Lead in Water in Washington — 2026

Last updated: June 3, 2026

558 ZIP codes ranked by Lead (mg/L) #1: ZIP 98582 (Salkum, WA) — 85.9 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 558 ZIP codes with data in Washington, these are the highest-ranked areas for lead (mg/l). See also: National Worst ZIP Codes for Lead in Water | All Washington Rankings

Statistic Value
ZIP codes ranked 558
Highest value 85.9 ppb
Median value 2.1 ppb
State Washington

Top 100 Worst ZIP Codes

Rank ZIP Code City State Lead (mg/L) Safety Score
1 98582 Salkum WA 85.9 ppb 62/100
2 98648 Stevenson WA 36.0 ppb 42/100
3 98624 Ilwaco WA 26.0 ppb 70/100
4 98604 Battle Ground WA 25.0 ppb 64/100
5 98622 Heisson WA 25.0 ppb 53/100
6 98586 South Bend WA 23.0 ppb 65/100
7 98640 Ocean Park WA 20.0 ppb 70/100
8 98926 Ellensburg WA 15.0 ppb 73/100
9 98237 Concrete WA 14.3 ppb 62/100
10 99352 Richland WA 14.0 ppb 78/100
11 99353 West Richland WA 14.0 ppb 72/100
12 99354 Richland WA 14.0 ppb 78/100
13 98922 Cle Elum WA 13.0 ppb 49/100
14 98267 Marblemount WA 12.0 ppb 70/100
15 98371 Puyallup WA 10.0 ppb 82/100
16 98372 Puyallup WA 10.0 ppb 87/100
17 98373 Puyallup WA 10.0 ppb 92/100
18 98374 Puyallup WA 10.0 ppb 87/100
19 99343 Mesa WA 10.0 ppb 62/100
20 98236 Clinton WA 9.8 ppb 71/100
21 98511 Tumwater WA 9.0 ppb 77/100
22 98589 Tenino WA 9.0 ppb 79/100
23 98614 Chinook WA 9.0 ppb 86/100
24 98941 Roslyn WA 7.8 ppb 72/100
25 98354 Milton WA 7.4 ppb 89/100
26 99143 Lacrosse WA 7.4 ppb 72/100
27 98224 Baring WA 6.5 ppb 73/100
28 98503 Lacey WA 6.4 ppb 93/100
29 98509 Lacey WA 6.4 ppb 96/100
30 98513 Olympia WA 6.4 ppb 84/100
31 98040 Mercer Island WA 6.3 ppb 87/100
32 98568 Oakville WA 6.2 ppb 82/100
33 98255 Hamilton WA 6.1 ppb 77/100
34 98365 Port Ludlow WA 5.9 ppb 87/100
35 98815 Cashmere WA 5.8 ppb 86/100
36 98158 Seattle WA 5.6 ppb 99/100
37 98248 Ferndale WA 5.6 ppb 82/100
38 98813 Bridgeport WA 5.4 ppb 80/100
39 98245 Eastsound WA 5.3 ppb 93/100
40 98851 Soap Lake WA 5.2 ppb 83/100
41 99341 Lind WA 5.2 ppb 82/100
42 98004 Bellevue WA 5.1 ppb 82/100
43 98005 Bellevue WA 5.1 ppb 87/100
44 98006 Bellevue WA 5.1 ppb 82/100
45 98007 Bellevue WA 5.1 ppb 82/100
46 98008 Bellevue WA 5.1 ppb 82/100
47 98009 Bellevue WA 5.1 ppb 88/100
48 98015 Bellevue WA 5.1 ppb 88/100
49 98039 Medina WA 5.1 ppb 73/100
50 98055 Renton WA 5.1 ppb 94/100
51 98056 Renton WA 5.1 ppb 94/100
52 98057 Renton WA 5.1 ppb 94/100
53 98058 Renton WA 5.1 ppb 84/100
54 98059 Renton WA 5.1 ppb 94/100
55 98250 Friday Harbor WA 5.0 ppb 70/100
56 98314 Bremerton WA 5.0 ppb 99/100
57 98611 Castle Rock WA 5.0 ppb 85/100
58 99157 Northport WA 4.9 ppb 64/100
59 98330 Elbe WA 4.8 ppb 99/100
60 98816 Chelan WA 4.8 ppb 91/100
61 99103 Almira WA 4.8 ppb 83/100
62 98822 Entiat WA 4.4 ppb 93/100
63 98650 Trout Lake WA 4.2 ppb 82/100
64 98020 Edmonds WA 4.0 ppb 90/100
65 98026 Edmonds WA 4.0 ppb 90/100
66 98036 Lynnwood WA 4.0 ppb 76/100
67 98037 Lynnwood WA 4.0 ppb 81/100
68 98046 Lynnwood WA 4.0 ppb 82/100
69 98068 Snoqualmie Pass WA 4.0 ppb 81/100
70 98087 Lynnwood WA 4.0 ppb 81/100
71 98201 Everett WA 4.0 ppb 82/100
72 98203 Everett WA 4.0 ppb 87/100
73 98204 Everett WA 4.0 ppb 87/100
74 98205 Everett WA 4.0 ppb 87/100
75 98206 Everett WA 4.0 ppb 87/100
76 98207 Everett WA 4.0 ppb 91/100
77 98208 Everett WA 4.0 ppb 82/100
78 98213 Everett WA 4.0 ppb 91/100
79 98272 Monroe WA 4.0 ppb 69/100
80 98310 Bremerton WA 4.0 ppb 90/100
81 98311 Bremerton WA 4.0 ppb 95/100
82 98312 Bremerton WA 4.0 ppb 90/100
83 98325 Chimacum WA 4.0 ppb 96/100
84 98337 Bremerton WA 4.0 ppb 99/100
85 98368 Port Townsend WA 4.0 ppb 89/100
86 98393 Tracyton WA 4.0 ppb 66/100
87 98501 Olympia WA 4.0 ppb 89/100
88 98502 Olympia WA 4.0 ppb 89/100
89 98504 Olympia WA 4.0 ppb 98/100
90 98505 Olympia WA 4.0 ppb 98/100
91 98506 Olympia WA 4.0 ppb 94/100
92 98507 Olympia WA 4.0 ppb 94/100
93 98508 Olympia WA 4.0 ppb 98/100
94 98512 Olympia WA 4.0 ppb 89/100
95 98516 Olympia WA 4.0 ppb 94/100
96 98591 Toledo WA 4.0 ppb 90/100
97 98599 Olympia WA 4.0 ppb 98/100
98 98641 Oysterville WA 4.0 ppb 99/100
99 98239 Coupeville WA 3.9 ppb 94/100
100 98148 Seattle WA 3.8 ppb 95/100

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: 2026-06-03.

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.

Explore More Rankings

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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