Illinois · population 33,482
Lead pipes in St. Charles, IL
926 lead or galvanized lines to replace
Most of St. Charles (population 33,482) gets its water from St Charles. That system reported 812 lead and 114 galvanized-requiring-replacement service lines out of 13,021, with 3,703 more of unknown material.
7.1% of St Charles's service lines are lead or galvanized requiring replacement, lower than the Illinois average (17%) and higher than the national average (3.1%).
- Lead 6.2%
- Galvanized (replace) 0.9%
- Unknown 28%
- Non-lead 64%
Latest lead test for St Charles (Jan 2026–Jun 2026): 3.9 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, 1 still open for St Charles.
Water systems serving St. Charles
| Water system | Lead | Galv. | Unknown | % lead |
|---|---|---|---|---|
| St CharlesMain system | 812 | 114 | 3,703 | 7.1% |
| GenevaServes nearby areas | 448 | 85 | 89 | 6.3% |
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 St. Charles
The counts above cover the whole water system. To see whether your line is lead, look up your address on St Charles'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
- Geneva533 lead + galv. lines
- Wayne926 lead + galv. lines
- South Elgin5 unknown
- West Chicago780 lead + galv. lines
- Batavia385 lead + galv. lines
- Campton Hills378 unknown
- Bartlett71 lead + galv. lines
- North Aurora225 lead + galv. lines
Check another water system
Questions
Does St. Charles, IL have lead pipes?
Yes. St Charles, which serves St. Charles, reported 812 lead and 114 galvanized-requiring-replacement service lines, plus 3,703 of unknown material.
Who supplies water to St. Charles?
EPA's service area maps place most of St. Charles in St Charles's service area (PWSID IL0894830). Geneva also serves parts of the city or nearby areas.
How do I check whether my St. Charles home has a lead service line?
Search your address on St Charles'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 St. Charles 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 St Charles whether your street is scheduled and whether it covers the private side.