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Lead service lines in Naperville, IL

19 water utilities serve Naperville, with approximately 160,498 people served.

Last verified from EPA SDWIS + utility inventories: 2026-04-14
Known lead
0
Galvanized
0
Unknown
0
% unknown
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Lead Service Lines in Naperville, IL

Naperville serves about 160,500 people through 19 different water systems. The good news: the city's lead service line inventory data shows no known lead service lines have been identified so far.

That said, "not yet identified" is different from "definitely absent." Older homes—especially those built before the 1980s—are more likely to have lead service lines, which are the pipes connecting your meter to the city's main water line. The only way to know for sure is to have your specific line inspected or tested.

What you should know

Lead service lines are a real concern, but fixable. Lead can leach into your water, especially if water is corrosive or sit unused for hours. Infants and young children are at highest risk for health effects. The CDC recommends flushing your tap for 30 seconds to 2 minutes before drinking or cooking if water has been unused for 6+ hours.

Naperville's main utility is the City of Naperville (serving 156,406 people). The other systems listed—Suburban Hospital, Tamarack Golf Club, and others—serve smaller populations at specific locations.

**Your next step is finding out what's your service line.** The City of Naperville's Water Division maintains records of service line materials by address. They can tell you whether your line is lead, copper, galvanized steel, or unknown—and help you understand testing and replacement options.

If your service line is lead or unknown, you have choices: professional testing kits, flushing protocols, or full replacement (often with financial assistance available). Don't panic, but don't delay either.

Next steps for residents

  • Contact the City of Naperville Water Division and ask for your service line material. Have your address ready.
  • If your line is unknown or lead, request testing guidance. Ask about any rebate or replacement programs.
  • For health concerns, talk to your pediatrician or visit the CDC's lead and drinking water page.
  • Filter or flush if needed while you wait for answers—your utility can advise on the best short-term approach for your situation.

Utilities serving Naperville

Common questions

Does Naperville have lead in the water?

Naperville's inventory shows no confirmed lead service lines so far, but "unknown" lines may still exist. The only way to know your home's service line material is to contact the City of Naperville Water Division with your address.

How do I find out if I have a lead service line?

Call or visit the City of Naperville Water Division website and provide your street address. They can look up your service line material in their records. If it's unknown, they can recommend testing.

Is lead in water dangerous?

Lead can affect brain development in infants and young children. If you're concerned about health effects, talk to your pediatrician or contact the CDC. For water safety tips, ask your utility about flushing or filtration.

What do I do if my service line is lead?

You can replace it—some utilities and states offer grants or rebates. In the meantime, flush your tap before drinking and use cold water for cooking. Contact your water utility to learn about assistance programs.