The Manhasset-Lakeville Water District serves 10,000 residential
and 600 commercial customers in a 10.2 square mile area.
The estimated population within the District is 45,000
The District's average annual pumpage is 2.49 billion gallons.
Average daily winter usage is 5.0 million gallons.
Average daily summer usage is 13.0 million gallons.
Average daily usage is 7.4 million gallons.
Maximum daily usage has topped 18.3 million gallons.
In case of an emergency, the District has six interconnections with
our neighboring districts.... Port Washington, the Water
Authority of Great Neck North, Albertson, Garden City
Park and the Western Nassau Water Authority.
Every gallon of water consumed by District users is metered and
recorded by computer and billed accordingly.
The Manhasset-Lakeville Water District is one of the oldest
public water suppliers on Long Island, having been
established in 1911.
North Shore University Hospital is the largest water user in the
The Manhasset-Lakeville Water District is served by 18
wells, six treatment plants, two elevated storage tanks,
two underground storage tanks and 20 employees.
All of our water comes from underground wells. Unlike New York
City, Long Island does not use reservoir water nor have
a surface water system.
On July 8, the Governor’s office announced that the New York State
Department of Health (NYSDOH) has proposed
new drinking water standards for the emerging contaminants
PFOA, PFOS, and 1,4-dioxane, which are polluting Long Island
groundwater from industrial chemicals that were used and disposed
here for decades.
We have changed our Backflow Program submittal process. Read
about the new process here