Illinois · population 8,188
Lead pipes in Oak Brook, IL
9 lead or galvanized lines to replace
Most of Oak Brook (population 8,188) gets its water from Aqua Illinois-Oak Brook. That system reported 0 lead and 9 galvanized-requiring-replacement service lines out of 2,040, with 1,733 more of unknown material.
0.4% of Aqua Illinois-Oak Brook'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%
- Galvanized (replace) 0.4%
- Unknown 85%
- Non-lead 15%
Latest lead test for Aqua Illinois-Oak Brook (Jan 2026–Dec 2028): not detected 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 Aqua Illinois-Oak Brook.
Water systems serving Oak Brook
| Water system | Lead | Galv. | Unknown | % lead |
|---|---|---|---|---|
| Aqua Illinois-Oak BrookMain system | 0 | 9 | 1,733 | 0.4% |
| Oak BrookAlso serves parts of the city | 0 | 0 | 0 | 0% |
| WestmontServes nearby areas | 137 | 108 | 184 | 3.8% |
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 Oak Brook
The counts above cover the whole water system. To see whether your line is lead, look up your address on Aqua Illinois-Oak Brook'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
- Oakbrook Terraceno lead reported
- Clarendon Hills160 lead + galv. lines
- Hinsdale183 lead + galv. lines
- Westmont245 lead + galv. lines
- Westchester3,399 lead + galv. lines
- Hillside486 lead + galv. lines
- Western Springs414 lead + galv. lines
- Villa Park205 lead + galv. lines
Check another water system
Questions
Does Oak Brook, IL have lead pipes?
Yes. Aqua Illinois-Oak Brook, which serves Oak Brook, reported 0 lead and 9 galvanized-requiring-replacement service lines, plus 1,733 of unknown material.
Who supplies water to Oak Brook?
EPA's service area maps place most of Oak Brook in Aqua Illinois-Oak Brook's service area (PWSID IL0430055). Oak Brook, Westmont also serve parts of the city or nearby areas.
How do I check whether my Oak Brook home has a lead service line?
Search your address on Aqua Illinois-Oak Brook'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 Oak Brook 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 Aqua Illinois-Oak Brook whether your street is scheduled and whether it covers the private side.