Lead Service Lines in Seattle, WA
What you need to know
Seattle's water systems serve about 1.3 million people across 34 different utilities. The largest is Seattle Public Utilities, which supplies water to roughly 1.2 million residents in the city.
Lead service lines are pipes that carry water from the main water line under the street to your home. If your service line contains lead, water sitting in that pipe overnight or between uses can pick up lead before it reaches your tap. This is different from lead in the water source itself—Seattle's water comes from clean mountain watersheds and is not a lead source.
Your water system's lead inventory status
Currently, there is no reported data showing how many lead service lines exist in Seattle's water systems. This doesn't mean there are no lead lines—it means the utilities either haven't completed a full inventory yet, or results haven't been made public.
Seattle Public Utilities (serving 1.2 million people) and the other major systems listed here are required by the EPA to develop and publish lead service line inventories. Check back regularly with your specific utility for updates, or contact them directly to ask about their inventory timeline.
How to find out if your home has a lead service line
Contact your water utility directly—they're your best source. You can also:
- Check your water bill or the utility's website for inventory maps (some are now online)
- Ask about the age of your home and neighborhood (lines installed before 1950 are higher risk)
- Request a free or low-cost water test through your utility
- Have a licensed plumber inspect the service line if you can access it in your basement or outside
If your service line is lead
A lead service line doesn't automatically mean unsafe drinking water. The EPA and CDC recommend:
- Using a water filter certified to remove lead (NSF/ANSI Standard 53)
- Flushing the line by running cold water for 30 seconds before drinking or cooking
- Not boiling water—heat concentrates lead
Long-term, consider replacing your service line. Your utility may offer cost-sharing programs or rebates.
Next steps for residents
- Contact your water utility with your address to ask about their lead service line inventory status
- Request a water test through your utility if you want to know your current lead levels
- Check your utility's website for any published maps or data on lead service lines in your area
- Call the EPA's Safe Drinking Water Hotline (800-426-4791) if you have questions about lead in drinking water
```json [ { "q": "Does Seattle have lead in the water?", "a": "Seattle's water source comes from clean mountain watersheds and does not contain lead. However, lead can enter water through lead service lines—pipes connecting your home to the main water line. Check with your water utility to find out if your specific service line contains lead." }, { "q": "How do I know if my house has a lead service line in Seattle?", "a": "Contact your water utility with your address—they maintain records of service line materials. You can also ask a licensed plumber to inspect your home, or check if your utility has published a lead service line map online." }, { "q": "Is it safe to drink water from a lead service line?", "a": "Water sitting in a lead service line can accumulate lead, but the risk depends on how long water sits in the pipe and how corrosive your water is. Using a lead-certified water filter and flushing the line before drinking or cooking can reduce exposure. For health concerns, talk to your pediatrician or contact the CDC." }, { "q": "What should I do if my Seattle home has a lead service line?", "a": "Use a water filter certified to remove lead (NSF/ANSI Standard 53), flush cold water for 30 seconds before drinking, and avoid boiling. For a permanent fix,