Illinois · population 23,548
Lead pipes in Lisle, IL
25 lead or galvanized lines to replace
Most of Lisle (population 23,548) gets its water from Lisle. That system reported 10 lead and 15 galvanized-requiring-replacement service lines out of 6,129, with 1 more of unknown material.
0.4% of Lisle's service lines are lead or galvanized requiring replacement, lower than the Illinois average (17%) and lower than the national average (3.1%).
- Lead 0.2%
- Galvanized (replace) 0.2%
- Unknown <0.1%
- Non-lead 100%
Latest lead test for Lisle (Jan 2026–Dec 2028): 1.3 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 Lisle.
Water systems serving Lisle
| Water system | Lead | Galv. | Unknown | % lead |
|---|---|---|---|---|
| LisleMain system | 10 | 15 | 1 | 0.4% |
| NapervilleServes nearby areas | 265 | 28 | 29 | 0.6% |
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 Lisle
The counts above cover the whole water system. To see whether your line is lead, look up your address on Lisle'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
- Downers Grove1,466 lead + galv. lines
- Woodridgeno lead reported
- Wheaton180 lead + galv. lines
- Naperville293 lead + galv. lines
- Glen Ellyn585 lead + galv. lines
- Warrenvilleno lead reported
- Westmont245 lead + galv. lines
- Darien1,407 unknown
Check another water system
Questions
Does Lisle, IL have lead pipes?
Yes. Lisle, which serves Lisle, reported 10 lead and 15 galvanized-requiring-replacement service lines, plus 1 of unknown material.
Who supplies water to Lisle?
EPA's service area maps place most of Lisle in Lisle's service area (PWSID IL0430551). Naperville also serves parts of the city or nearby areas.
How do I check whether my Lisle home has a lead service line?
Search your address on Lisle'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 Lisle 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 Lisle whether your street is scheduled and whether it covers the private side.