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2,682 Washington water systems have inventoried 2,169,608 service lines for EPA. 244 (<0.1%) are confirmed lead and 220,440 (10%) are still of unknown material. Below: every large or city-linked Washington utility ranked by lead lines.
Washington water systems reported 244 lead service lines and 6,689 galvanized lines requiring replacement as of Q2 2026 — <0.1% of the 2,169,608 lines inventoried and <0.1% of the national lead total, ranking #40 of 51. No Washington system in this dataset reports a confirmed lead line yet.
None of the large or city-linked Washington systems in EPA's Q2 2026 inventory report a confirmed lead service line, though 220,440 lines statewide are still of unknown material.
Find your utility in the table below, then check its published service line inventory (most utilities post an address-lookup map) or call the number on your water bill. Utilities must notify customers whose line is lead, galvanized-requiring-replacement or unknown. You can also test the pipe entering your home: lead is soft, dull gray, non-magnetic and turns shiny when scratched.
Under EPA's Lead and Copper Rule Improvements, systems must replace lead and galvanized-requiring-replacement lines within 10 years starting in 2027; systems with very high counts can receive longer deadlines. Ask your utility for its replacement plan and whether it covers the homeowner-owned portion.
Use a filter certified to NSF/ANSI 53 for lead for drinking and cooking, flush the tap after water has sat for hours, never use hot tap water for drinking or infant formula, and confirm your actual level with a certified lab test.
Source: EPA SDWIS Service Line Inventory, Q2 2026 snapshot (updated 2026-08-18). Counts are service lines, not people.
A certified mail-in lab test shows exactly what's in your water — lead plus dozens of other contaminants — with EPA-grade accuracy. Know your real levels before spending on a filter.
Certified lab · results in days
Community systems serving 50,000+ people plus systems linked to a city report on this site (38 shown). State totals above include every reporting system.
| # | Water system | Status | Lead | GRR | Unknown | Total lines | City report |
|---|---|---|---|---|---|---|---|
| 1 | ALDERWOOD WATER DISTRICT WA5301300 · 245,715 served | Many lines still unverified | 0 | 0 | 24,002 | 58,623 | |
| 2 | SAMMAMISH PLATEAU WATER & SEWER WA5340900 · 79,362 served | Many lines still unverified | 0 | 0 | 17,213 | 36,913 | |
| 3 | PASCO WATER DEPARTMENT WA5366400 · 115,102 served | Many lines still unverified | 0 | 0 | 10,550 | 23,800 | |
| 4 | SOUTHWOOD WA5382844 · 64,155 served | Many lines still unverified | 0 | 0 | 9,895 | 15,670 | |
| 5 | BELLEVUE CITY OF WA5305575 · 321,349 served | No lead service lines reported | 0 | 0 | 9,739 | 40,476 | |
| 6 | PUYALLUP CITY OF WA5370050 · 94,520 served | No lead service lines reported | 0 | 0 | 2,681 | 11,735 | |
| 7 | LAKEHAVEN WATER AND SEWER DISTRICT WA5341997 · 148,809 served | No lead service lines reported | 0 | 0 | 2,088 | 34,089 | |
| 8 | NORTHSHORE UTILITY DISTRICT WA5340800 · 99,789 served | No lead service lines reported | 0 | 0 | 2,001 | 22,883 | |
| 9 | COVINGTON WATER DISTRICT WA5341650 · 56,172 served | No lead service lines reported | 0 | 0 | 242 | 18,323 | |
| 10 | LONGVIEW WATER DEPARTMENT WA5348100 · 57,617 served | Lead service lines present | 0 | 108 | 33 | 14,529 | |
| 11 | LAKEWOOD WATER DISTRICT WA5345550 · 82,425 served | No lead service lines reported | 0 | 0 | 5 | 17,192 | |
| 12 | SEATTLE PUBLIC UTILITIES WA5377050 · 1,161,961 served | No lead service lines reported | 0 | 0 | 0 | 206,340 | |
| 13 | TACOMA WATER DIVISION CITY OF WA5386800 · 446,170 served | No lead service lines reported | 0 | 0 | 0 | 114,107 | |
| 14 | VANCOUVER CITY OF WA5391200 · 373,047 served | No lead service lines reported | 0 | 0 | 0 | 77,500 | |
| 15 | SPOKANE CITY OF WA5383100 · 346,138 served | Lead service lines present | 0 | 1,001 | 0 | 85,716 | |
| 16 | EVERETT PUBLIC WORKS DEPT. CITY OF WA5324050 · 215,774 served | No lead service lines reported | 0 | 0 | 0 | 29,738 | |
| 17 | KENT WATER DEPARTMENT WA5338150 · 166,421 served | No lead service lines reported | 0 | 0 | 0 | 15,886 | |
| 18 | REDMOND WATER SYSTEM CITY OF WA5371650 · 163,335 served | No lead service lines reported | 0 | 0 | 0 | 18,652 | |
| 19 | CLARK PUBLIC UTILITIES WA5313333 · 153,526 served | No inventory reported yet | 0 | 0 | 0 | 0 | |
| 20 | BELLINGHAM-WATER DIVISION CITY OF WA5305600 · 141,127 served | No lead service lines reported | 0 | 0 | 0 | 26,922 | |
| 21 | OLYMPIA CITY OF WA5363450 · 126,966 served | No lead service lines reported | 0 | 0 | 0 | 20,311 | |
| 22 | KENNEWICK CITY OF WA5338100 · 118,164 served | No lead service lines reported | 0 | 0 | 0 | 24,155 | |
| 23 | YAKIMA WATER DIVISION CITY OF WA5399150 · 112,858 served | No lead service lines reported | 0 | 0 | 0 | 19,420 | |
| 24 | SKAGIT COUNTY PUD 1 JUDY RES WA5379500 · 111,415 served | Lead service lines present | 0 | 5 | 0 | 26,902 | |
| 25 | RENTON CITY OF WA5371850 · 108,091 served | No lead service lines reported | 0 | 0 | 0 | 18,764 | |
| 26 | Auburn City of WA5303350 · 107,655 served | No lead service lines reported | 0 | 0 | 0 | 15,504 | |
| 27 | RICHLAND CITY OF WA5372250 · 106,499 served | No lead service lines reported | 0 | 0 | 0 | 22,634 | |
| 28 | LACEY WATER DEPARTMENT WA5343500 · 105,178 served | No lead service lines reported | 0 | 0 | 0 | 25,641 | |
| 29 | HIGHLINE WATER DISTRICT WA5340650 · 100,170 served | No lead service lines reported | 0 | 0 | 0 | 18,780 | |
| 30 | MARYSVILLE UTILITIES WA5351900 · 88,582 served | No lead service lines reported | 0 | 0 | 0 | 23,199 | |
| 31 | SOOS CREEK WATER & SEWER DISTRICT WA5340100 · 74,172 served | Lead service lines present | 0 | 246 | 0 | 19,192 | |
| 32 | BREMERTON CITY OF WA5308200 · 72,951 served | No lead service lines reported | 0 | 0 | 0 | 20,315 | |
| 33 | KIRKLAND CITY OF WA5342250 · 69,243 served | Lead service lines present | 0 | 82 | 0 | 13,332 | |
| 34 | LYNNWOOD CITY OF WA5349270 · 68,204 served | No inventory reported yet | 0 | 0 | 0 | 0 | |
| 35 | SNO PUD 1 - LAKE STEVENS WA5380907 · 67,710 served | No lead service lines reported | 0 | 0 | 0 | 21,499 | |
| 36 | WOODINVILLE WATER DISTRICT WA5341600 · 66,699 served | No lead service lines reported | 0 | 0 | 0 | 14,831 | |
| 37 | SILVER LAKE WATER & SEWER DISTRICT WA5379250 · 65,033 served | No lead service lines reported | 0 | 0 | 0 | 19,046 | |
| 38 | TUMWATER CITY OF WA5389700 · 51,802 served | No lead service lines reported | 0 | 0 | 0 | 8,842 |
A lead or unknown service line means lead can enter water after it leaves the treatment plant, so city-level test results understate what reaches your tap. Filter drinking and cooking water with an NSF/ANSI 53 lead-certified system, and see the lead in drinking water guide or Washington city water reports.
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