Illinois · population 5,413
Lead pipes in Posen, IL
1,122 lead or galvanized lines to replace
Most of Posen (population 5,413) gets its water from Posen. That system reported 1,121 lead and 1 galvanized-requiring-replacement service lines out of 1,741, with 474 more of unknown material.
64% of Posen's service lines are lead or galvanized requiring replacement, higher than the Illinois average (17%) and higher than the national average (3.1%).
- Lead 64%
- Galvanized (replace) <0.1%
- Unknown 27%
- Non-lead 8.3%
Latest lead test for Posen (Jan 2026–Jun 2026): 6 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 Posen.
Water systems serving Posen
| Water system | Lead | Galv. | Unknown | % lead |
|---|---|---|---|---|
| PosenMain system | 1,121 | 1 | 474 | 64% |
| Blue IslandServes nearby areas | 778 | 0 | 4,540 | 14% |
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 Posen
The counts above cover the whole water system. To see whether your line is lead, look up your address on Posen'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
- Dixmoor24 lead + galv. lines
- Robbins1,332 lead + galv. lines
- Blue Island778 lead + galv. lines
- Midlothian568 lead + galv. lines
- Markham1,239 lead + galv. lines
- Harvey190 lead + galv. lines
- Riverdale241 lead + galv. lines
- Calumet Park2,231 lead + galv. lines
Check another water system
Questions
Does Posen, IL have lead pipes?
Yes. Posen, which serves Posen, reported 1,121 lead and 1 galvanized-requiring-replacement service lines, plus 474 of unknown material.
Who supplies water to Posen?
EPA's service area maps place most of Posen in Posen's service area (PWSID IL0312520). Blue Island also serves parts of the city or nearby areas.
How do I check whether my Posen home has a lead service line?
Search your address on Posen'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 Posen 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 Posen whether your street is scheduled and whether it covers the private side.