A routine round of tap water testing in Aurora has turned into a wake-up call for some homeowners, with city officials issuing a public notice Tuesday after elevated lead levels were found in certain homes. City leaders are stressing that the results do not mean every tap in Aurora is contaminated. Instead, they say the higher readings are tied to specific houses where old service lines or plumbing are likely shedding lead particles. The warning drops at a time when Chicago-area suburbs are already on edge about aging water infrastructure and tougher federal rules.
According to the City of Aurora, the Water Production Division pulled 100 tap samples between July and December 2025. More than 10 percent of those samples came in above the Environmental Protection Agency's action level for lead, which automatically triggers a public notice. The city says treated water leaving the plant still meets state and federal standards and that the problem typically shows up once water hits older lead service lines, solder or fixtures inside individual properties.
FOX 32 Chicago reported that earlier testing from January through June 2025 showed roughly 19 percent of sampled taps over the 15 parts-per-billion mark. That higher first-half rate, followed by the latest exceedance, lines up with a trend seen at other water systems after Lead and Copper Rule Revisions tightened sampling locations and procedures.
What the action level means
The Environmental Protection Agency sets the lead action level at 0.015 mg/L (15 ppb), a regulatory trigger used to gauge how well corrosion control is working rather than a direct health-based standard, according to EPA. A utility must notify the public when more than 10 percent of its compliance samples are above that threshold.
Aurora officials say updated state Lead & Copper Rule Revisions, along with a shift to testing both the first and fifth liters at the tap, are uncovering more particulate lead than older testing regimes did, according to the City of Aurora. In other words, the water plant may be in compliance, but the new sampling method is better at catching lead that breaks loose from pipes and plumbing. When an action level exceedance occurs, utilities typically have to reassess corrosion control, ramp up sampling and speed up replacement of lead service lines.
How Aurora is responding
City officials told FOX 32 Chicago they plan to expand ongoing sampling, widen public education efforts for homeowners, continue pulling out lead service lines across the system and evaluate a centralized "enhanced corrosion control" treatment at the water plant. According to the outlet, Aurora has already replaced nearly 3,000 lead service lines since 2018 and has more removals queued up. City leaders say they will also offer guidance to individual households and provide testing assistance to residents who request it.
How to protect your household
While the city works on the systemwide fixes, residents are being urged to take some basic precautions at home. Federal guidance recommends using only cold tap water for drinking and cooking, running faucets for a minute or two after water has been sitting in the lines, regularly cleaning faucet aerators and using filters that are certified to remove lead. Boiling water does not remove lead, EPA warns.
The Centers for Disease Control and Prevention uses a blood lead reference value of 3.5 micrograms per deciliter for children and recommends follow-up care and environmental investigation when tests come back elevated, according to CDC. Homeowners who want to know whether their service line is made of lead can contact their water utility or check local resources for testing and replacement options.
