On a recent sun-drenched morning, the staccato rhythms of a jackhammer ricocheted off buildings as a work crew dug into a Newark street to remove an aging pipe that carried water — and potentially a poison — to a small apartment building.

The new pipe is copper. The old one was lined with lead, which can be harmful to human health even at minute levels.

The water service line was one of more than 20,000 made with the toxic metal the city began replacing in 2019 amid public outrage over revelations about high lead levels in the tap water in schools and homes across the city.

Less than three years after the work began, the replacement project, initially projected to take up to 10 years, is nearly complete.

City residents who switched to bottled water during the crisis are breathing — and drinking — easier. Newark, once castigated and sued over its sluggish response to the problem, is being held up as a potential national model.

“I’m just happy that it’s happening and that it’s finally getting taken care of so we finally get to drink tap water again,” Newark resident Cesar Velarde said as he watched the crew work. “I have three cases of bottled water right now. I don’t drink faucet water no more because of this.”

The pipe replacement project has been a vindication of sorts for Mayor Ras Baraka, who faced mounting public pressure in 2018 after the National Resources Defense Council, a nonprofit environmental advocacy group, sued, claiming New Jersey’s largest city had failed to adequately monitor lead levels and had downplayed the problem to residents.

Deteriorating lead-lined pipes, some a century old, are a problem in many older U.S. cities, a recent example being Benton Harbor, Michigan. But Newark’s replacement project proceeded faster than expected, thanks to an infusion of state and local funds and an amendment to state law to protect homeowners from having to bear the cost.

“I’ll feel better when we’re completely finished, but I’m excited that we’re at the end of this thing. It’ll be a huge milestone for us,” Baraka said last week.

Newark’s efforts led to the lawsuit being settled last January, and drew praise from the National Resources Defense Council.

“It’s a pretty significant turnaround from the early days when the city was denying they had a lead problem,” Erik Olson, NRDC senior strategic director for health, said. “We are pointing to it as a model for other cities to follow. They’re doing it much faster than other cities have even tried to do.”