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Illinois has the most lead pipes per capita of any state, according to a 2023 study by the U.S. Environmental Protection Agency.

There is no safe level of lead in drinking water, according to the U.S. Environmental Protection Agency. (Antonio Perez / Chicago Tribune / Getty Images via CNN Newsource)

Researchers found about 75% of residential city blocks in Chicago had lead-contaminated water. And more than two-thirds children under the age of 6 in Chicago live on these blocks and may be exposed to lead-contaminated water.

Randy Conner (Courtesy City of Chicago)

Mayor Brandon Johnson praised former Water Commissioner Randy Conner as a “proven leader and someone who knows the ins and outs of infrastructure and water management,” in a statement.

A cut lead pipe is pulled from a dig site for testing at a home in Royal Oak, Mich., on Nov. 16, 2021. The Environmental Protection Agency will soon strengthen lead in drinking water regulations. (AP Photo / Carlos Osorio, File)

Decades after officials banned lead in gasoline for new cars and stopped the sale of lead paint there are still an estimated 500,000 U.S. children with levels of lead in their blood that are considered high, and experts say lead in drinking water is an important source.

(WTTW News)

Toxic lead-based paint was banned in 1978, but the threat of poisoning persists. In suburban Cook County, officials say as many as half a million homes have lead paint hazards that present enormous health threats for young children.

A lead water service line from 1927 lays on the ground on a residential street after being removed on June 17, 2021, in Denver. (AP Photo / Brittany Peterson, File)

The survey released Tuesday was the first time the agency asked about lead pipes and gave the best count yet of how many are underground. Illinois ranked second in with 1.04 million lead pipes.

(WTTW News)

Recently, a young child was poisoned in his Belmont-Cragin apartment and now faces a host of health problems. It’s spurred a debate on whether the city can do more to fix the problem before another child is affected. 

Dr. Allison Arwady, commissioner of the Chicago Department of Public Health, appears on "Chicago Tonight" on March 20, 2023. (WTTW News)

Throughout the pandemic, Dr. Allison Arwady, commissioner of the Chicago Department of Public Health, led Chicago’s effort to fight the deadly virus. On this third anniversary of the pandemic, Arwady reflects on lessons learned and whether she would have done anything differently. 

Jedi Rucizka, 2, of Chicago, was hospitalized for lead poisoning. (WTTW News)

Paint containing lead has been outlawed in Chicago since 1978, but a WTTW News investigation has found the vast majority of Chicago’s housing stock still contains potentially toxic levels of the substance.

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Starting Jan. 1, city crews will have to replace all of the lead service lines connected to a water main that is being repaired — and foot the bill, which is expected to cost between $15,000 to $26,000 per line.

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One in 20 tap water samples taken from thousands of Chicagoans found lead levels at or above federal limits, according to a recent analysis by the Guardian. It also found that nine of the top 10 ZIP codes with the largest percentages of high test results were in neighborhoods with majority Black and Latino residents.

(U.S. Air Force photo by Airman 1st Class Alexxis Pons Abascal)
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Despite promises, a federally-funded program has removed just 154 lead service lines from Chicago homes as of Monday, according to data provided to WTTW News by the Department of Water Management.

FILE - Lead water pipes pulled from underneath the street are seen in Newark, N.J., Oct. 21, 2021. Lead pipes have caused harm for decades. In recent years, residents in Newark and Benton Harbor, Mich., were forced to use bottled water for basic needs like cooking and drinking, after tests revealed elevated levels of lead. (AP Photo/Seth Wenig, File)
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As billions of dollars in new federal funding becomes available to address the problem of lead pipes contaminating drinking water, some places are in a better position than others to quickly apply for funds and start digging.

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The unanimous vote of the City Council’s Budget and Government Operations Committee sends the proposal backed by Lightfoot to the full City Council for consideration at its meeting on May 25. 

A water lead testing kit. (WTTW News)
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Lead service lines connect approximately 400,000 Chicago homes with water mains buried under city streets, and can leach a brain-damaging chemical into drinking water. 

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In an interview with “Chicago Tonight” Tuesday, Department of Water Commissioner Andrea Cheng said officials are confident both regular and ultrasonic water meters can be safely installed in Chicago homes without threatening the health of residents.