How do you check for lead service lines on an Aurora, IL home?
Look up the address on the City of Aurora’s service line inventory map, then confirm it at the pipe where water enters the house. The city estimates about 16,200 lead service lines in its system, and the homeowner owns the whole line from the water main to the house. Aurora replaces lead lines at no cost over time but can’t promise when, so know the line material before you write an offer.
By Kealan O’Neil | October 19, 2026
If you’re starting to look at homes in Aurora, lead service lines belong on your list next to price, taxes, and commute. This isn’t a reason to skip the city. It’s a quick check that tells you what you’re buying under the front yard.
Aurora spans Kane, DuPage, Kendall, and Will counties, and the city describes its housing as a mix of older and newer homes. The pipe that connects each one to the water main varies just as much.
Here’s what changed this year, how to check a specific house, and who pays if the line is lead.
What Aurora’s 2026 lead notice means for house hunters
On July 14, 2026, the City of Aurora published a Lead Action Level Exceedance Notice. Between January and June 2026, the city’s Water Production Division collected 100 tap samples from homes in its sampling program, and more than 10 percent exceeded the EPA’s lead action level of 15 parts per billion.
The details matter more than the headline. The city says there is no detectable lead in the finished water leaving its treatment plant or in the distribution system. The lead comes from the service line and plumbing at specific homes.
The city also points to a testing change: under the federal Lead and Copper Rule Revisions, staff now test the first and fifth liters from the faucet, and the fifth liter has sat longer in the service line, so results run higher than under the old method.
Three things matter for a buyer:
- It’s house by house. The city says pipe materials vary across Aurora, even among homes on the same block, so you can’t judge lead service lines by street or age alone.
- The city is acting. In an August 17, 2026 update, Aurora said it had begun orthophosphate corrosion control treatment and had replaced 3,549 lead service lines since 2018.
- The action level isn’t a health standard. The city’s notice says the action level measures how well corrosion control is working. It is not a standard for a safe level of lead in a home, and Illinois law states there is no safe level of lead exposure.
For the official wording, read the city’s Lead Action Level Exceedance Notice page, which also links the address map.
How to check lead service lines on a specific Aurora address
Do most of this before you schedule a showing. Here’s the order we’d follow.
1. Look up the address on the city’s inventory map
The city’s interactive service line map shows whether a line is recorded as lead, galvanized, or an unknown material, and whether a lead connector feeds it. Illinois law requires every community water supply to build this inventory and post it publicly.
Treat “unknown” on the map of lead service lines with care. The City of Aurora says the EPA requires unknown materials to be treated as lead until they’re identified. An unknown result is a question to answer, not a clean result.
2. Confirm it at the pipe inside the house
The city’s own instructions use a coin or flat screwdriver and a refrigerator magnet. Find the pipe where water enters the house, usually in the basement before the shut-off valve and meter, and gently scratch a small spot.
- Shiny silver and the magnet doesn’t stick: possibly lead.
- Copper colored and the magnet doesn’t stick: possibly copper.
- Dull gray and the magnet sticks: possibly galvanized steel.
Ask before scratching anything in a seller’s home. During the inspection, have your home inspector photograph the pipe at the entry point. This only shows the section inside the house; the buried run to the street can differ.
3. Ask the seller what they’ve received
The City of Aurora sends annual letters to addresses it believes are served by a lead line, as federal rules require after the inventory is filed. Ask the seller for any city letters, test results, plumbing invoices, or replacement records.
On the Illinois disclosure form, statement 17 asks whether the seller is aware of unsafe concentrations of or unsafe conditions relating to lead paint, lead water pipes, lead plumbing pipes, or lead in the soil. The form runs on the seller’s actual knowledge, so a “no” isn’t proof the line is lead-free. Read the exact wording in the Residential Real Property Disclosure Report.
4. Test the water
Aurora’s Water Production Division offers help with lead sampling procedures on request, at 630-256-3250 or [email protected], and lists certified labs it works with. A test tells you what’s at the tap today; the map and the pipe tell you what’s in the ground.
Look past the service line, too. The city says homes built before 1986 are more likely to have lead pipes, fixtures, and solder, so a home inspector or licensed plumber should look at the interior plumbing as well.
5. Confirm who supplies the water
Check whose name is on the water bill. Everything above describes the City of Aurora’s program. If a different utility serves the home, the same Illinois law on lead service lines applies, but you’ll need that utility’s inventory and schedule.
If this feels familiar, it’s the same idea as a sewer scope inspection before you buy: the most expensive pipes on a property are often the ones you can’t see.
Who pays to replace a lead service line in Aurora?
The City of Aurora says the property owner owns the entire water service line to the water main. That ownership is why the timing and cost of lead service lines land on you as the buyer.
The free path: wait for the city
Under the state’s Lead Service Line Replacement and Notification Act, Aurora must replace all lead service lines, plus galvanized lines that are or were connected downstream of lead. The city says that through its program, your line will eventually be replaced at no cost to you.
The catch is timing. A water system reporting more than 9,999 but fewer than 99,999 lead service lines must replace at least 3 percent a year, with up to 34 years to finish, counted from its final replacement plan. The city says it can’t guarantee your line will be replaced in the next several years.
The city also replaces lines at no cost in two other situations: when city maintenance or construction disturbs a lead line, with a temporary filter right away and replacement within 30 days, and when a test of the line comes back above the action level.
The faster path: replace the private side yourself
You can pay to replace the house side of the line, from the meter inside the home to the curb stop. The city says that typically costs $4,000 to $6,000.
When you do, the city provides a filter before the work starts and then replaces the section from the curb stop to the water main at its own expense, within 30 days, weather permitting. Call the city’s Engineering Division at 630-256-3200 before hiring anyone.
That call matters. State law requires an owner who plans to replace part of a lead service line to notify the water supply at least 45 days before starting, and it otherwise bars partial replacements by owners. The text is in 415 ILCS 5/17.12.
If the city calls you first
A 2026 amendment to the same law says an owner must allow the water supply access to replace the private side when it offers to do it at no cost. If the home you buy is on the city’s list, a free replacement offer is something to accept, not avoid.
Aurora’s Lead in Drinking Water page has the full explanation.
What the best real estate agents in Aurora, IL check before you fall for a house
The right time to learn about lead service lines is before you’re attached to the kitchen. A good Aurora agent folds this into the first look at a listing:
- Pull the service line map for every address on your short list.
- Note the age of the home and ask about interior plumbing updates.
- Request city letters and plumbing records along with the disclosure report.
- Put the service line on the home inspector’s list, with photos.
- Decide ahead of time how a lead result fits your budget.
A lead line doesn’t have to end your interest in a house. For one buyer, it’s a reason to ask about price; for another, it’s a first-year project. What hurts is finding out after closing.
Lead in water is a separate issue from lead paint. For homes built before 1978, federal rules add a lead paint disclosure that works on its own timeline. And if you’re comparing Aurora with towns to the southwest, our guide to Lake Michigan water in Yorkville shows how much water details vary across Chicago’s Western Suburbs.
Questions Aurora buyers ask about lead service lines
How do I find out if an Aurora home has a lead service line?
Does Aurora replace lead service lines for free?
How much does it cost to replace the private side of a lead service line in Aurora?
Does an Illinois seller have to disclose a lead service line?
How do I choose the top real estate brokerage in Aurora, IL?
Start your Aurora search with the details that don’t show in photos
Citing a 2018 Illinois EPA inventory, the General Assembly put the state at more than 680,000 lead service lines, and Aurora is replacing its share on a schedule set by state law. For a buyer, the job is to know the line material, the water test, and the replacement path before you commit.
If you’re just starting to look in Aurora or anywhere in Chicago’s Western Suburbs, I’m happy to pull up the service line map with you, walk through the Aurora market, and talk through your options, with no pressure to buy anything. Call or text Kealan at 630-425-8815.
About Kealan O’Neil
Kealan O’Neil is the Designated Managing Broker and founder of O’Neil Property Group, an independent real estate brokerage based in Yorkville, Illinois. He and his team help buyers and sellers in Yorkville, Oswego, Montgomery, and the surrounding Kendall and Kane County communities, and he owns and manages a local rental portfolio, so he approaches every decision as both a broker and an investor. Call or text Kealan at 630-425-8815.
This post is general information about real estate in the Fox Valley, not legal, tax, or financial advice. Real estate laws, tax rules, and municipal ordinances change, and how they apply depends on your specific situation. Talk with a licensed attorney, CPA, or lender before making decisions about a purchase, sale, or tax matter. O’Neil Property Group is a licensed Illinois real estate brokerage.