Illinois · population 153,124
Lead pipes in Naperville, IL
293 lead or galvanized lines to replace
Most of Naperville (population 153,124) gets its water from Naperville. That system reported 265 lead and 28 galvanized-requiring-replacement service lines out of 47,379, with 29 more of unknown material.
0.6% of Naperville's service lines are lead or galvanized requiring replacement, lower than the Illinois average (17%) and lower than the national average (3.1%).
- Lead 0.6%
- Galvanized (replace) <0.1%
- Unknown <0.1%
- Non-lead 99%
Latest lead test for Naperville (2026): 6.1 ppb at the 90th percentile, against a 15 ppb federal action level. Full test history.
Compliance record: EPA lists no Lead and Copper Rule violations since 2015 for Naperville.
Water systems serving Naperville
| Water system | Lead | Galv. | Unknown | % lead |
|---|---|---|---|---|
| NapervilleMain system | 265 | 28 | 29 | 0.6% |
| AuroraServes nearby areas | 16,063 | 0 | 16 | 32% |
Matched from EPA water system service area boundaries and the cities each system reports serving. Edges of the city may be served by a neighboring system; your water bill names your utility.
Check your address in Naperville
The counts above cover the whole water system. To see whether your line is lead, look up your address on Naperville's official inventory. Utilities had to make these public by October 16, 2024.
No map yet? Do the 2-minute scratch and magnet test.
Protect your drinking water
If your line is lead, galvanized or unknown, use a filter certified to NSF/ANSI 53 for lead for drinking, cooking and baby formula, and use only cold water.
Choosing a lead-certified filter · Testing your water · Replacement cost
Nearby cities
- Lisle25 lead + galv. lines
- Warrenvilleno lead reported
- Bolingbrookno lead reported
- Woodridgeno lead reported
- Downers Grove1,466 lead + galv. lines
- Wheaton180 lead + galv. lines
- Winfieldno lead reported
- Darien1,407 unknown
Check another water system
Questions
Does Naperville, IL have lead pipes?
Yes. Naperville, which serves Naperville, reported 265 lead and 28 galvanized-requiring-replacement service lines, plus 29 of unknown material.
Who supplies water to Naperville?
EPA's service area maps place most of Naperville in Naperville's service area (PWSID IL0434670). Aurora also serves parts of the city or nearby areas.
How do I check whether my Naperville home has a lead service line?
Search your address on Naperville's service line inventory map. You can also scratch the pipe where water enters your home: lead is soft, dull gray, scratches to shiny silver and doesn't attract a magnet.
When will lead pipes in Naperville be replaced?
EPA's Lead and Copper Rule Improvements require most systems to replace lead and galvanized-requiring-replacement lines by December 31, 2037. Ask Naperville whether your street is scheduled and whether it covers the private side.