Chicago faces one of the most costly and complex challenges in replacing lead water service lines among U.S. cities, with expenses averaging about $31,000 per line—significantly higher than the national estimate of $4,700 provided by the U.S. Environmental Protection Agency. With more than 400,000 lead service lines in the city, this places Chicago at the center of a massive infrastructure and public health undertaking that could exceed $12 billion if replacements continue at the current rate.
The city’s replacement program, which began earnest efforts around 2021, has encountered multiple obstacles contributing to the inflated costs. These include inefficient contracting practices in the early stages, cumbersome permitting requirements, and prioritization of one-off replacements instead of replacing pipes along whole city blocks. While block-level replacements have proven more cost-effective in other cities like Milwaukee, they only accounted for about 3% of Chicago’s replaced lines between 2021 and 2025.
Legal and logistical hurdles complicate the city’s efforts to expand block replacements. Under Illinois law, property owners control half of each service line, and municipalities are responsible for the other half. Partial replacements are prohibited due to the risk of increased lead exposure, and municipalities cannot replace private lines without owner consent, which often delays or prevents broader-scale projects. A recently passed bill aims to grant city plumbers access to private lines without owner permission, but it awaits the governor’s signature.
Chicago’s Department of Water Management, which oversees the replacement program, has struggled to provide clear and consistent data regarding project costs and the number of lines replaced, prompting critics to call for greater transparency. Officials maintain that early contracts were hampered by unknowns and inefficiencies, and that labor costs contribute to the elevated expenses. However, comparisons with other cities suggest prevailing wages do not fully explain the discrepancy, as cities with similar or higher labor costs manage to replace lines at substantially lower rates.
The permitting process also burdens homeowners opting to replace lead lines on their own, often involving fees ranging from several thousand dollars, depending on permits and inspections required by multiple city departments. Some residents have reported difficulties finding willing plumbers and navigating confusing regulations, with overall costs reaching $22,000 to $25,000 or more. Although some fee waivers are available, eligibility is limited, adding financial strain to affected households.
Federal funding initiatives, including the Infrastructure Investment and Jobs Act, have allocated significant resources to lead service line replacement in Illinois, with about $1.2 billion designated for the state and a recent $22 million grant targeting Chicago’s Austin neighborhood, where the majority of service lines still require replacement. Yet, experts note that at Chicago’s current expense levels, federal funds will address only a fraction of the total need, underscoring the urgency of cost reduction.
Public health advocates and experts have urged Chicago to provide detailed explanations of its high costs and prioritize more efficient strategies. “They need to figure out how to complete the most cost-efficient lead service line replacements in the country, not the most expensive,” said Elin Betanzo, a national drinking water expert involved in Flint, Michigan’s water crisis response.
City officials emphasize ongoing efforts to accelerate the pace of replacements, streamline processes, and maximize available funds, while facing the challenge of coordinating across multiple agencies and meeting federal mandates requiring removal of all lead pipes within approximately two decades. Without substantial improvements in efficiency and transparency, the financial and logistical barriers may continue to impede progress on a critical public health issue in America’s third-largest city.