In a basement in Chicago's South Side, a plumber cuts through a section of water service line and holds it up. The interior is coated with a chalky white crust — the remnants of decades of corrosion treatment applied by the city's water department to keep lead from leaching into drinking water. The treatment works, mostly, until it doesn't. A change in water chemistry, a main break, a pressure drop — any disruption can release a pulse of dissolved lead into a family's tap water. There is no safe level of lead exposure. The pipe itself is the problem.
Chicago has approximately 412,000 lead service lines — more than any city in America, accounting for roughly 84 percent of all water connections in the city. At the current replacement pace of about 2,000 lines per year, the city's own plan wouldn't finish until 2076. But the federal government says that isn't good enough. Not anymore.
The Rule That Changed Everything
On October 8, 2024, the Environmental Protection Agency finalized the Lead and Copper Rule Improvements — the most significant overhaul of lead-in-water standards in more than three decades. The LCRI, as it's known, does something no previous regulation attempted: it mandates that virtually every lead service line in America be identified and replaced, regardless of whether current water testing shows elevated lead levels.
The core requirements are straightforward and aggressive. Every community water system must complete a service line inventory and submit a replacement plan by November 1, 2027. The lead action level — the threshold that triggers mandatory public notification and corrective action — drops from 15 parts per billion to 10. And every lead and galvanized-requiring-replacement service line must be removed by 2037, with systems required to replace at least 10 percent of their inventory annually once replacement obligations begin.
The scale of the undertaking is staggering. EPA's updated Seventh Drinking Water Infrastructure Needs Survey and Assessment estimates approximately 9 million lead service lines remain in use across the United States — about 9 percent of all water service connections nationally. The Natural Resources Defense Council puts the figure higher, estimating between 9.7 million and 12.8 million pipes that are lead or likely lead, with 6.2 million confirmed and millions more classified as "unknown" in utility records. EPA's own service line inventory database, based on utility-reported data, currently shows about 4 million confirmed or likely lead lines — a number that continues to grow as water systems complete their inventories.
Where the Pipes Are
Lead service lines are not distributed evenly. They are concentrated in the industrial heartland, the Great Lakes states, and the older cities of the Northeast — places where water infrastructure was built in the late 19th and early 20th centuries, when lead was the preferred material for water connections.
Illinois has the largest burden by a wide margin, driven almost entirely by Chicago. Ohio, New York, Michigan, and Indiana round out the top five states. Together, these five states received roughly 35 percent of all federal lead pipe replacement funding in the final round of Infrastructure Investment and Jobs Act allocations announced in May 2026. Meanwhile, 31 states receive the minimum 1 percent allotment — a formula that has drawn criticism for distributing scarce dollars to states with minimal lead pipe inventories while leaving the hardest-hit communities underfunded.
The geographic concentration creates a political and engineering challenge. The cities with the most lead pipes tend to be the ones with the oldest infrastructure, the tightest municipal budgets, and the most complex underground utility networks. Replacing a lead service line isn't just digging a trench — it requires locating the pipe (often through decades-old records that may be inaccurate), coordinating with the property owner, managing traffic and utility conflicts, restoring the street and sidewalk, and testing the water afterward. Average costs run about $12,500 per line, though they can exceed $20,000 in dense urban environments.
A Tale of Two Cities
The gap between what's possible and what's happening is best illustrated by comparing two cities at opposite ends of the replacement spectrum.
Newark, New Jersey replaced all of its lead service lines — approximately 23,000 — in under three years, completing the program in February 2022. The city financed the work through a $120 million Essex County bond and supplemental state and federal funds. Crucially, Newark made the entire program free to residents, sent crews door-to-door, and passed a city ordinance prohibiting lead service lines outright. When President Biden announced the LCRI at a Milwaukee event in late 2024, Newark's water utility director was the only invited guest whose city had already accomplished the goal.
Newark proved that rapid, citywide lead pipe replacement is technically feasible and politically achievable. It required sustained political will, creative financing, and a willingness to treat the problem as an emergency rather than a decades-long capital improvement project.
Chicago tells a different story. The city estimates that 412,000 of its roughly 491,000 water service lines require replacement because they are known or suspected to contain lead. Over the past four years, Chicago has replaced approximately 7,900 lines — less than 2 percent of its inventory. At its current pace, the city would need roughly 50 years to finish.
The federal rule requires Chicago to replace nearly 20,000 pipes per year beginning in 2027 — more than double the speed of the city's current plan. City Council members have publicly criticized the Department of Water Management for sitting on hundreds of millions of dollars in federal loan funds earmarked for lead pipe replacement while making minimal progress. The city has pledged to accelerate spending in 2026, but the engineering, workforce, and logistical challenges of replacing 20,000 service lines annually in a city with Chicago's density and infrastructure complexity are enormous.
The Health Case Is Unambiguous
Lead is a neurotoxin with no safe threshold of exposure. In children, even low levels of lead in blood are associated with reduced IQ, developmental delays, attention disorders, and behavioral problems. In adults, chronic low-level exposure contributes to hypertension, kidney damage, and cardiovascular disease. The damage, particularly in developing brains, is largely irreversible.
An NRDC analysis of EPA monitoring data found that between 2018 and 2020, 186 million Americans — 56 percent of the country's population — were served by water systems that detected lead at levels exceeding 1 part per billion. That's well below the old 15 ppb action level but well above zero. The pipes themselves create a constant, low-grade exposure pathway that no amount of corrosion control treatment can fully eliminate.
EPA's own economic analysis for the LCRI estimates annual benefits of $7 billion to $37 billion, driven primarily by avoided cognitive harm in children — higher IQ scores, better educational outcomes, increased lifetime earnings — and reduced cardiovascular disease in adults. Against estimated annual compliance costs of roughly $1.5 to $2 billion, the cost-benefit ratio is among the most favorable of any environmental regulation in recent memory. Even the American Water Works Association, which is actively challenging the rule in court, does not dispute that lead pipes should eventually be replaced. Their argument is about pace and cost allocation, not the underlying public health imperative.
The Money Question
Congress allocated $15 billion through the Bipartisan Infrastructure Law specifically for lead service line identification and replacement, distributed through the Drinking Water State Revolving Fund over five years. The fifth and final round of IIJA allotments was announced in May 2026. That $15 billion sounds substantial until you measure it against the scope of the problem.
The American Water Works Association estimates total replacement costs exceeding $100 billion. The Environmental Policy Innovation Center has calculated that even after all five rounds of IIJA funding, the money covers only 15 to 21 percent of estimated replacement costs in the most heavily burdened states. Georgia, notably, was the only state to receive an allotment increase in the final funding round, gaining $2 million — a 6 percent bump. Most other states saw decreases.
The funding cliff is real. With the IIJA's five-year lead pipe allocation now fully distributed, no comparable federal funding stream is currently authorized. Reallotment of unspent funds from states that couldn't deploy their allocations will continue through approximately 2028, but the flow is slowing. Water utilities will increasingly need to rely on rate increases, municipal bonds, state revolving fund loans, and creative financing to close the gap between what the federal government provided and what the rule requires.
A Surprising Political Consensus
In a political environment where environmental regulations are routinely contested along partisan lines, the LCRI has found an unexpected degree of bipartisan support. In February 2026, the Trump administration's EPA filed a court brief defending the Biden-era rule, arguing that it is "lawful, reasonable, and should be upheld." The agency noted it would also develop new tools and guidance to support "practical implementation flexibilities" — language that advocacy groups like NRDC are watching carefully for potential loopholes — but the core defense of the mandate was unequivocal.
The AWWA's legal challenge continues, with oral arguments before the D.C. Circuit Court of Appeals scheduled for September 30, 2026. The industry group argues that the 10-year deadline is unrealistic, that requiring utilities to replace pipes on private property exceeds EPA's authority, and that costs are excessively burdensome. EPA counters that Congress granted it authority over "public water systems" — a definition that encompasses the full service line, regardless of property ownership — and that the replacement timeline, while ambitious, is feasible based on cities like Newark that have already demonstrated it can be done.
The political consensus likely reflects a simple reality: nobody wants to be the politician who argued against replacing lead pipes that poison children. Lead in drinking water is not a culture-war issue. It's a plumbing problem with a neurotoxic consequence, and the solution — dig up the old pipe, put in a new one — is brutally simple even if the logistics are complex.
What Happens Now
The next 18 months will determine whether the LCRI's ambition translates into reality. By November 2027, every community water system in America must have a complete service line inventory and an approved replacement plan. The systems that haven't started — and many haven't — face an increasingly compressed timeline to build the institutional capacity, workforce pipelines, and financing mechanisms needed to replace thousands of service lines per year.
The workforce challenge alone is significant. Replacing 9 million service lines in a decade requires trained plumbers, pipefitters, excavation crews, and water quality technicians at a scale the industry has never previously mobilized. Some states are investing in apprenticeship programs and pre-apprenticeship pipelines. Others haven't started.
At EPR Foundation, we see the LCRI as one of the most consequential public health regulations of this generation. The rule recognizes a truth that should have been acted on decades ago: the pipe is the problem, corrosion control is a Band-Aid, and the only durable solution is removal. Newark proved it can be done quickly when the political will exists. Chicago shows what happens when it doesn't.
Nine million lead pipes still connect American water mains to American homes. Every one of them is a fuse. The question is no longer whether to replace them — the law now requires it. The question is whether we'll build the systems, train the workers, and commit the resources to actually get it done before the 2037 deadline arrives. For the children drinking from those pipes today, every year of delay has a measurable cost in IQ points, attention spans, and futures.
The clock is running. The pipes are still in the ground.