Central Park Flood Project Will Save 175M Gallons of Water
The $35.7 million North End Recirculation Project will use the Harlem Meer, the Loch and the Pool to hold stormwater, reduce pressure on sewers and reuse water in northern Central Park.
A new Central Park flood project is designed to keep about 132 million gallons of water out of local sewers each year while conserving an estimated 175 million gallons of drinking water. State and city officials broke ground Monday, Oct. 26, on the $35.7 million North End Recirculation Project, which is intended to reduce flood pressure in Harlem and East Harlem and improve three connected water bodies in northern Central Park.
The project will recirculate and filter water among the Harlem Meer, the Loch and the Pool. During normal dry weather, water will be moved through the system and returned by gravity. Before a major storm, operators will lower the Harlem Meer so it can hold incoming rainfall. The system will then return to normal circulation after storm conditions pass.
Gov. Kathy Hochul, New York City Mayor Zohran Kwame Mamdani and Central Park Conservancy President and CEO Betsy Smith announced the groundbreaking. Construction is expected to be completed in fall 2028.
How the water system is supposed to work
The design treats the park’s northern water bodies as working stormwater infrastructure as well as landscape features. In dry conditions, water will be diverted from the Meer and pumped to a point south of the Pool. It will then flow back through the connected system by gravity. That circulation is expected to improve water quality and reduce the warm, stagnant conditions that can contribute to harmful algal blooms.
When forecasts call for a major storm, the Harlem Meer’s level will be lowered in advance. The open storage space will allow rainfall from the park’s watershed to refill the Meer and other water bodies instead of moving immediately into neighborhood sewers. The state says the system will manage stormwater across 204 acres of Central Park and reduce stormwater flows to city sewers by 90 percent.
This approach matters because much of New York City uses combined sewers. As the city Department of Environmental Protection explains, a combined system carries stormwater and sanitary wastewater in the same pipe. Heavy rain can push large amounts of water into that network quickly. Holding and releasing rainfall more slowly can reduce pressure during the most intense period of a storm.
Where the $35.7 million comes from
The funding package combines state, city and private money:
- More than $19.6 million in New York City capital funding
- $10 million from a New York State Environmental Facilities Corporation Green Resiliency Grant, backed by the Clean Water, Clean Air, and Green Jobs Environmental Bond Act of 2022
- $2 million allocated by City Council Speaker Julie Menin
- $500,000 from Manhattan Borough President Brad Hoylman-Sigal
- $100,000 from Council Member Gale Brewer
- $3.5 million contributed by Central Park Conservancy donors
The announced amounts add to $35.7 million when the city share is counted at $19.6 million. Because officials described that city amount as more than $19.6 million, final accounting documents may show a slightly different precise figure within the same total.
The state portion comes from the $4.2 billion Environmental Bond Act approved by voters in 2022. The act supports several categories of environmental work, including flood-risk reduction, water-quality projects, climate mitigation and open-space protection. The Phoenix has covered other state green-infrastructure grants and water-quality investments funded through state programs.
What officials say the project will deliver
The administration projects three major annual water benefits:
- About 132 million gallons kept out of local sewers
- About 175 million gallons of potable water conserved
- A 90 percent reduction in stormwater flows from the managed park watershed to city sewers
The savings come partly from reducing Central Park’s use of city drinking water to replenish the Harlem Meer, Loch and Pool. Drinking water is currently the primary water source for those water bodies, according to the state announcement.
Hochul described the project as a forward-looking response to more dangerous extreme weather. Mamdani said the city had spent one in three days under a flash-flood activation so far in 2026 and argued that the system would protect neighborhoods while stretching the drinking-water supply. That one-in-three figure was presented by the mayor in the announcement and should be read as his administration’s description of city activation days, not as a count of days when flooding occurred.
NYSEFC President and CEO Maureen Coleman said the grant was intended to make stormwater infrastructure more affordable. Central Park Conservancy leader Betsy Smith called the recirculation system the organization’s most ambitious infrastructure project to date. City environmental and parks officials emphasized the combined goals of flood mitigation, water conservation and healthier park waterways.
Residents helped shape the proposal through the city’s Climate Strong Communities process, according to New York City Chief Climate Officer Louise Yeung. The project has support from all five community boards surrounding Central Park. The Landmarks Preservation Commission issued an advisory report supporting it, and the city Public Design Commission granted final design approval in December 2024.
A modern system built around an old landscape
The Pool, Loch and Harlem Meer were designed by Frederick Law Olmsted and Calvert Vaux and constructed as an interconnected water system between 1862 and 1865. The new project uses that historic relationship but adds pumps, controls and filtration for modern water management.
It follows other work at the north end of the park. The Conservancy opened the Davis Center at the Harlem Meer in 2025, replacing the former Lasker Rink and Pool with a four-season recreation center integrated into the landscape. Work is also continuing along the Harlem Meer shoreline, including a section connecting the Davis Center to the Conservatory Garden.
The project’s infrastructure may be largely out of sight when finished, but the operational details will be important. Public reporting should track whether it meets the 2028 schedule, how much stormwater the system actually captures, whether water-quality conditions improve and whether flood complaints decline in the areas it is meant to help.
Why a New York City project matters upstate
This is a New York City construction project, not a Mohawk Valley flood-control project. Its direct protection will be in and around northern Central Park. Still, the funding and design offer useful lessons for Utica, Rome and other upstate communities facing heavy-rain and drainage challenges.
First, parks, ponds and other public landscapes can be designed to store water temporarily instead of sending it immediately into pipes. Second, large resilience projects often need a blend of state, local and private funding. Third, measurements matter. Claims about gallons captured or flows reduced should be checked after construction, not only announced beforehand.
The state’s Environmental Bond Act and Green Resiliency Grant programs are statewide tools, although eligibility and award rounds vary. Local governments and nonprofit partners can monitor Environmental Facilities Corporation funding opportunities and Department of Environmental Conservation flood-resilience programs. A Central Park design cannot simply be copied into the Mohawk Valley, but the underlying principle of keeping stormwater close to where it falls applies across New York.
The Phoenix has also reported on community reforestation grants, another approach that can help neighborhoods manage heat and rainfall while improving public space.
What comes next
Construction is expected to continue through fall 2028. During that period, agencies and the Conservancy should provide clear notices about park access, project milestones and changes to the schedule or budget. The public should also be able to compare the completed system’s performance with the announced targets.
For Harlem and East Harlem residents, the key test is not the groundbreaking but whether the project reduces water reaching streets and sewers during major storms. For the rest of New York, the project is a visible example of how voter-approved environmental money can support a large, measurable infrastructure intervention.
Readers who have experienced flooding near the park or who work on stormwater projects in the Mohawk Valley are invited to share what solutions have worked in their neighborhoods.
