Lead pipes in Dupage County, Illinois
How many lead pipes are in Dupage County, IL?
Water systems based in Dupage County reported 6,550 lead service lines, 1,790 galvanized lines that need replacing and 13,811 lines of unknown material to EPA (Q3 2026). Lombard has the most, with 2,212 lead and galvanized lines.
Who pays in Illinois
Illinois was one of the first states to require full replacement of every lead service line. Each water supply must file a final replacement plan by April 15, 2027, then replace a set share of its lead lines every year, on a timeline of 15 to 50 years depending on how many it has. A utility may bill the owner for the private side only if it is not using state or federal money for that work, and an owner can sign a waiver to decline private-side replacement. Illinois EPA lends to water systems and forgives part of the loan in lower-income communities, which is why many Illinois programs are free.
Confirmed programs in Dupage County
- Lombard: Public side free; up to $5,000 for private side.
- Downers Grove: Starts after Nov 2027; owner share undecided.
Every Dupage County water system with lead lines
Systems are grouped by the county EPA lists as their main service area. Some serve towns in neighboring counties too.
| Water system | Lead | Galv. | Unknown | Program |
|---|---|---|---|---|
| Lombard Lombard | 1,335 | 877 | 0 | Utility pays part |
| Downers Grove Downers Grove | 1,285 | 181 | 1,330 | Program not open yet |
| Elmhurst Elmhurst | 1,201 | 4 | 0 | Not confirmed |
| West Chicago West Chicago | 436 | 344 | 0 | Not confirmed |
| Glen Ellyn Glen Ellyn | 435 | 150 | 239 | Not confirmed |
| Bensenville Bensenville | 573 | 0 | 0 | Not confirmed |
| Naperville Naperville | 265 | 28 | 29 | Not confirmed |
| Westmont Westmont | 137 | 108 | 184 | Not confirmed |
| Villa Park Villa Park | 161 | 44 | 6,063 | Not confirmed |
| Roselle Roselle | 185 | 0 | 44 | Not confirmed |
| Hinsdale Hinsdale | 183 | 0 | 261 | Not confirmed |
| Wheaton Wheaton | 180 | 0 | 525 | Not confirmed |
| Clarendon Hills Clarendon Hills | 145 | 15 | 0 | Not confirmed |
| Lisle Lisle | 10 | 15 | 1 | Not confirmed |
| Liberty Park Homeowners Association Liberty Park Homeowners Association | 3 | 15 | 154 | Not confirmed |
| Addison Addison | 16 | 0 | 325 | Not confirmed |
| Oak Brook Aqua Illinois-Oak Brook | 0 | 9 | 1,733 | Not confirmed |
| Darien Darien | 0 | 0 | 1,407 | Not confirmed |
| Willowbrook Willowbrook | 0 | 0 | 1,516 | Not confirmed |
Systems over the new 10 ppb lead action level
Lombard (10.6 ppb, 2026-01 to 2026-06). See all systems over 10 ppb.
Common questions
How many lead pipes are in Dupage County, IL?
Water systems based in Dupage County reported 6,550 lead service lines, 1,790 galvanized lines that need replacing and 13,811 lines of unknown material to EPA (Q3 2026). Lombard has the most, with 2,212 lead and galvanized lines.
Who pays to replace lead service lines in Dupage County?
It depends on your water utility. Illinois was one of the first states to require full replacement of every lead service line. We have confirmed programs for 2 Dupage County utilities, listed on this page.
How do I find out if my house has a lead service line?
Look up your address on your water utility's service line inventory map, or check the pipe where it enters your home: lead is dull gray, soft, scratches to shiny silver, and a magnet won't stick. See our step-by-step guide.
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