Illinois · population 34,546
Lead pipes in Northbrook, IL
314 lead or galvanized lines to replace
Most of Northbrook (population 34,546) gets its water from Northbrook. That system reported 313 lead and 1 galvanized-requiring-replacement service lines out of 12,509, with 0 more of unknown material.
2.5% of Northbrook's service lines are lead or galvanized requiring replacement, lower than the Illinois average (17%) and about the same as the national average (3.1%).
- Lead 2.5%
- Galvanized (replace) <0.1%
- Unknown 0%
- Non-lead 97%
Latest lead test for Northbrook (Jan 2026–Jun 2026): 11 ppb at the 90th percentile, against a 15 ppb federal action level. Full test history.
Compliance record: EPA lists 1 Lead and Copper Rule violation since 2015 for Northbrook.
Water systems serving Northbrook
| Water system | Lead | Galv. | Unknown | % lead |
|---|---|---|---|---|
| NorthbrookMain system | 313 | 1 | 0 | 2.5% |
| Harbor Point Estates MHPAlso serves parts of the city | 0 | 0 | 0 | 0% |
| DeerfieldServes nearby areas | 276 | 0 | 1,396 | 4.3% |
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 Northbrook
The counts above cover the whole water system. To see whether your line is lead, look up your address on Northbrook'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
- Deerfield276 lead + galv. lines
- Glenview427 lead + galv. lines
- Northfield85 lead + galv. lines
- Glencoe528 lead + galv. lines
- Highland Park1,773 lead + galv. lines
- Riverwoodsno lead reported
- Wheelingno lead reported
- Bannockburn1 lead + galv. lines
Check another water system
Questions
Does Northbrook, IL have lead pipes?
Yes. Northbrook, which serves Northbrook, reported 313 lead and 1 galvanized-requiring-replacement service lines, plus 0 of unknown material.
Who supplies water to Northbrook?
EPA's service area maps place most of Northbrook in Northbrook's service area (PWSID IL0312070). Harbor Point Estates MHP, Deerfield also serve parts of the city or nearby areas.
How do I check whether my Northbrook home has a lead service line?
Search your address on Northbrook'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 Northbrook 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 Northbrook whether your street is scheduled and whether it covers the private side.