Illinois · population 12,433
Lead pipes in Northlake, IL
237 lead or galvanized lines to replace
Most of Northlake (population 12,433) gets its water from Northlake. That system reported 150 lead and 87 galvanized-requiring-replacement service lines out of 3,093, with 1,447 more of unknown material.
7.7% of Northlake's service lines are lead or galvanized requiring replacement, lower than the Illinois average (17%) and higher than the national average (3.1%).
- Lead 4.8%
- Galvanized (replace) 2.8%
- Unknown 47%
- Non-lead 46%
Latest lead test for Northlake (Jan 2026–Dec 2028): 2.6 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 Northlake.
Water systems serving Northlake
| Water system | Lead | Galv. | Unknown | % lead |
|---|---|---|---|---|
| NorthlakeMain system | 150 | 87 | 1,447 | 7.7% |
| Leyden TWSP Water DistrictServes nearby areas | 110 | 93 | 3 | 6.8% |
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 Northlake
The counts above cover the whole water system. To see whether your line is lead, look up your address on Northlake'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
- Stone Park71 lead + galv. lines
- Berkeley472 lead + galv. lines
- Franklin Park2,345 lead + galv. lines
- Melrose Park744 lead + galv. lines
- Elmhurst1,205 lead + galv. lines
- Bellwood1,257 lead + galv. lines
- Hillside486 lead + galv. lines
- River Grove1,845 lead + galv. lines
Check another water system
Questions
Does Northlake, IL have lead pipes?
Yes. Northlake, which serves Northlake, reported 150 lead and 87 galvanized-requiring-replacement service lines, plus 1,447 of unknown material.
Who supplies water to Northlake?
EPA's service area maps place most of Northlake in Northlake's service area (PWSID IL0314710). Leyden TWSP Water District also serves parts of the city or nearby areas.
How do I check whether my Northlake home has a lead service line?
Search your address on Northlake'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 Northlake 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 Northlake whether your street is scheduled and whether it covers the private side.