Snohomish County, WA · PWSID WA5301300
Alderwood Water District lead service lines
24,002 lines still unidentified
Alderwood Water District reported no confirmed lead service lines, but 24,002 of 58,623 lines (41%) are still listed as "lead status unknown." Until a line is identified, treat it as possibly lead.
0% of Alderwood Water District's service lines are lead or galvanized requiring replacement. That's lower than the Washington average (0.3%) and lower than the national average (3.1%).
- Lead 0%
- Galvanized (replace) 0%
- Unknown 41%
- Non-lead 59%
Total service lines reported: 58,623. Reported all required service line types. Population served: 245,715; 85,285 connections.
Progress since 2025 Q1
Reported lead and galvanized-requiring-replacement lines went from 0 in 2025 Q1 to 0 in 2026 Q3: no change. Lines of unknown material went from 24,002 to 24,002, no change.
Quarterly counts reported to EPA. A drop usually means lines were replaced or confirmed non-lead; a rise usually means more lines were identified. Replacement progress rankings.
Lead rule violations
EPA's data lists no Lead and Copper Rule violations for Alderwood Water District since 2015. That covers testing, reporting, corrosion control and public notice requirements; it isn't a guarantee about any individual home.
Source: EPA SDWIS violation records for the Lead and Copper Rule.
Where the water comes from
Alderwood Water District's main water source is purchased surface water. It buys treated water from City of Everett Public Works Dept.. The seller treats the water, including corrosion control that keeps lead from dissolving out of pipes, while Alderwood Water District is responsible for its own service line inventory and replacement program. It sells water to 10 other water systems: City of Bothell Water, Cascade Vista HOA, Cross Valley Water District, City of Edmonds, Northshore Utility District, City of Lynnwood, City of Mountlake Terrace, Mukilteo Water & Wastewater Distr, Silver Lake Water & Sewer District, Wandering Creek Homeowners Assoc.
Source: EPA SDWIS water system and facility records.
Check your own address
These counts cover the whole system. To see whether your line is lead, use the utility's address-level inventory. Utilities had to prepare one by October 16, 2024 and make it publicly accessible; systems serving more than 50,000 people must post it online.
No map yet? Do the 2-minute scratch and magnet test on the pipe where water enters your home.
Protect your drinking water now
If your line is lead, galvanized or unknown, filter water for drinking, cooking and baby formula. Use a filter certified to NSF/ANSI 53 for lead. Run cold water for a few minutes after it sits for hours, and never use hot tap water for cooking.
How to pick a lead-certified filter · How to test your water for lead
Getting the line replaced
EPA's Lead and Copper Rule Improvements require most systems to replace lead and galvanized-requiring-replacement lines by December 31, 2037. Ask Alderwood Water District whether it replaces the private side for free or with a cost share before you hire anyone. If you want it done sooner, or your utility doesn't cover your side, a licensed plumber can quote it. What replacement costs.
County pages: Lead pipes in Snohomish County
Cities served
ZIP codes served
ZIP codes whose center falls inside Alderwood Water District's mapped service area (EPA service area boundaries). Neighboring utilities may serve parts of the same ZIP.
98012980219803698087
Other water systems nearby
| System | Lead + galv. | Unknown |
|---|---|---|
| City of Arlington | 0 | 983 |
| Monroe Water System | 0 | 328 |
| City of Stanwood Water Dept | 0 | 1,240 |
| Roosevelt Water Association | 0 | 464 |
| Highland Water District | 0 | 413 |
| City of Gold Bar | 2 | 0 |
| Town of Darrington | 0 | 411 |
| Cascade Vista HOA | 1 | 80 |
Check another water system
Questions
Does Alderwood Water District have lead pipes?
It hasn't confirmed any, but 24,002 of its 58,623 service lines are still of unknown material, so lead has not been ruled out.
How do I check if my home's service line is lead?
Look up your address on Alderwood Water District's official service line inventory, which utilities must make publicly available. You can also scratch the pipe where it enters your home: lead is soft, dull gray, scratches to shiny silver and does not attract a magnet.
When will Alderwood Water District replace lead service lines?
Under EPA's Lead and Copper Rule Improvements, most systems must replace lead and galvanized-requiring-replacement lines by December 31, 2037, starting from November 1, 2027. The rule is being challenged in court, so dates could change. Many utilities run free or cost-share programs now.
Has Alderwood Water District had lead violations?
EPA's data shows no Lead and Copper Rule violations since 2015 for Alderwood Water District.
Which water filters remove lead?
Use a filter certified to NSF/ANSI Standard 53 for lead reduction, or NSF/ANSI 58 for reverse osmosis. Check the certification on NSF's listings, not just the box.
Embed or cite this data
Local news sites, blogs and community groups can embed this card. It updates when EPA releases new data.
Citation: Lead Pipe Map, "Alderwood Water District lead service lines," https://leadpipemap.com/wa/alderwood-water-district/. Source: EPA SDWIS service line inventory, 2026 Q3. Download the full dataset on the data page.