The Lead Service Line Mandate: What Illinois Homeowners Need to Know in 2026

Illinois lead service line mandate laws now directly impact homeowners with older properties, especially homes built before the mid-1980s. If your house has a lead service line connecting it to the municipal water supply, new state regulations require identification and eventual replacement. Understanding what this means for your home, your health, and your financial responsibility is essential.

What the Lead Service Line Mandate Is

In 2021, the Illinois General Assembly passed the Lead Service Line Replacement and Notification Act (Public Act 102-0613), which took effect on January 1, 2022. It requires owners and operators of community water supplies to inventory service line materials in their area and come up with a replacement plan for any lead lines. They’re also responsible for notifying homeowners/property owners and handling the replacement process (but not 100% of the costs, which we’ll get to shortly).

Why This Mandate Matters to You

Lead in drinking water is hazardous, especially for young children, pregnant people, and older adults. Even low levels of lead exposure over time can affect brain and nervous system development in children and increase health risks in adults. Because of that, the state is removing lead service lines wherever they still exist.

What Homeowners Should Expect

You might receive a written notice from your city or water supplier if your home is identified as having a lead service line. Illinois law requires utilities to attempt written notification before work begins.

The town or water system may also ask for access to your property to inspect and replace the line. If you don’t respond, state regulations still give them access.

Note that there are no partial replacements allowed under state law. If your line contains lead, the entire thing has to be replaced, including the private section up to the meter.

Costs and Timelines

There’s no single timeline for state-wide replacement. Instead, it varies by community. Smaller water systems with fewer lead lines might have deadlines around 2042, while larger systems could take longer (sometimes into the 2070s) based on state guidance. There may be state or federal funding to help you cover your share of the costs, but again, that varies by community.

What You Should Do

Worried that your lead line might contain lead?

• Contact your local water utility to check.
• Make sure to read any notices from your water utility.
• Consider having a licensed plumber inspect the service line if you’re unsure.
• Ask about available financial assistance programs that help with replacement.

Knowing what to expect regarding your service line can make a big difference. Contact Elk Grove Village Sewer & Plumbing for more information.