2026 Rankings

ZIP Codes Ranked by Water-System Lead Results…

Last updated: October 14, 2026

315 ZIP codes ranked by Lead (ppb) #1: ZIP 98577 (Raymond, WA) - 23.0 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 315 ZIP codes with data in Washington, these are the highest-ranked areas for lead (ppb). See also: National Worst ZIP Codes for Lead in Water | All Washington Rankings

Statistic Value
ZIP codes ranked 315
Highest value 23.0 ppb
Median value 2.1 ppb
State Washington

Top 100 Worst ZIP Codes

Rank ZIP Code City State Lead (ppb) Safety Score
1 98577 Raymond WA 23.0 ppb 100/100
2 98586 South Bend WA 23.0 ppb 100/100
3 99016 Greenacres WA 20.8 ppb 61/100
4 99023 Mica WA 20.8 ppb —
5 99030 Rockford WA 20.8 ppb —
6 99036 Valleyford WA 20.8 ppb —
7 99037 Veradale WA 20.8 ppb 61/100
8 99216 Spokane WA 20.8 ppb 42/100
9 98631 Long Beach WA 20.0 ppb 100/100
10 98640 Ocean Park WA 20.0 ppb 99/100
11 98922 Cle Elum WA 13.0 ppb —
12 98940 Ronald WA 13.0 ppb —
13 98941 Roslyn WA 13.0 ppb —
14 98349 Lakebay WA 12.2 ppb —
15 98394 Vaughn WA 12.2 ppb —
16 99001 Airway Heights WA 11.1 ppb 50/100
17 99029 Reardan WA 11.1 ppb —
18 98236 Clinton WA 9.8 ppb —
19 98260 Langley WA 9.8 ppb —
20 98282 Camano Island WA 9.5 ppb —
21 98530 Bucoda WA 9.0 ppb —
22 98589 Tenino WA 9.0 ppb 98/100
23 98249 Freeland WA 8.6 ppb —
24 98605 Bingen WA 8.5 ppb —
25 98651 Underwood WA 8.5 ppb —
26 98501 Olympia WA 8.0 ppb 80/100
27 98512 Olympia WA 8.0 ppb 98/100
28 98335 Gig Harbor WA 7.4 ppb 98/100
29 98354 Milton WA 7.4 ppb 100/100
30 98345 Keyport WA 7.0 ppb —
31 98571 Pacific Beach WA 7.0 ppb —
32 98373 Puyallup WA 6.4 ppb 81/100
33 98563 Montesano WA 6.4 ppb 98/100
34 98503 Lacey WA 6.0 ppb 82/100
35 98513 Olympia WA 6.0 ppb 97/100
36 98516 Olympia WA 6.0 ppb 98/100
37 98325 Chimacum WA 5.9 ppb 99/100
38 98365 Port Ludlow WA 5.9 ppb —
39 98376 Quilcene WA 5.9 ppb —
40 98053 Redmond WA 5.8 ppb 83/100
41 98321 Buckley WA 5.8 ppb 92/100
42 98815 Cashmere WA 5.8 ppb —
43 98836 Monitor WA 5.8 ppb 100/100
44 98248 Ferndale WA 5.6 ppb 86/100
45 98303 Anderson Island WA 5.6 ppb —
46 98351 Longbranch WA 5.6 ppb —
47 98232 Bow WA 5.3 ppb —
48 98243 Deer Harbor WA 5.3 ppb —
49 98245 Eastsound WA 5.3 ppb —
50 98279 Olga WA 5.3 ppb —
51 98280 Orcas WA 5.3 ppb —
52 98672 White Salmon WA 5.3 ppb 81/100
53 98310 Bremerton WA 5.0 ppb 100/100
54 98311 Bremerton WA 5.0 ppb 98/100
55 98312 Bremerton WA 5.0 ppb 97/100
56 98337 Bremerton WA 5.0 ppb 100/100
57 98367 Port Orchard WA 5.0 ppb 81/100
58 98611 Castle Rock WA 5.0 ppb 98/100
59 98645 Silverlake WA 5.0 ppb —
60 99362 Walla Walla WA 4.4 ppb 67/100
61 98229 Bellingham WA 4.2 ppb 99/100
62 98262 Lummi Island WA 4.2 ppb —
63 98602 Appleton WA 4.2 ppb —
64 98650 Trout Lake WA 4.2 ppb —
65 99011 Fairchild Air Force Base WA 4.2 ppb 50/100
66 98329 Gig Harbor WA 4.0 ppb —
67 98370 Poulsbo WA 4.0 ppb 93/100
68 98372 Puyallup WA 4.0 ppb 79/100
69 98641 Oysterville WA 4.0 ppb —
70 98580 Roy WA 3.8 ppb —
71 98624 Ilwaco WA 3.8 ppb —
72 98644 Seaview WA 3.8 ppb 100/100
73 99111 Colfax WA 3.8 ppb 81/100
74 98240 Custer WA 3.6 ppb —
75 98812 Brewster WA 3.6 ppb —
76 98829 Malott WA 3.6 ppb —
77 98846 Pateros WA 3.6 ppb —
78 98201 Everett WA 3.5 ppb 99/100
79 98203 Everett WA 3.5 ppb 100/100
80 98204 Everett WA 3.5 ppb 100/100
81 98207 Everett WA 3.5 ppb —
82 98208 Everett WA 3.5 ppb 99/100
83 98239 Coupeville WA 3.5 ppb —
84 99401 Anatone WA 3.5 ppb —
85 99402 Asotin WA 3.5 ppb —
86 99403 Clarkston WA 3.5 ppb 83/100
87 98225 Bellingham WA 3.4 ppb 100/100
88 98226 Bellingham WA 3.4 ppb 82/100
89 98277 Oak Harbor WA 3.4 ppb —
90 98278 Oak Harbor WA 3.4 ppb —
91 98502 Olympia WA 3.4 ppb 69/100
92 98505 Olympia WA 3.4 ppb —
93 98506 Olympia WA 3.4 ppb 82/100
94 98576 Rainier WA 3.4 ppb —
95 98001 Auburn WA 3.3 ppb 82/100
96 98003 Federal Way WA 3.3 ppb 83/100
97 98023 Federal Way WA 3.3 ppb 83/100
98 98223 Arlington WA 3.2 ppb 92/100

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: 2026-10-14.

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.

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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