A private water company serving large parts of Nassau County asked its customers Wednesday to conserve water to lessen the drain on its emergency generators that are pumping water.

Don’t water the lawn, don’t take long showers or baths, and sweep — don’t hose — debris away from your home, New York American Water said.

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A private water company serving large parts of Nassau County asked its customers Wednesday to conserve water to lessen the drain on its emergency generators that are pumping water.

Don’t water the lawn, don’t take long showers or baths, and sweep — don’t hose — debris away from your home, New York American Water said.

If you do have electricity, run dishwashers and washing machines only when full, and use the save-water feature if the machine has it.

The company said the water is safe to drink and it has not issued a boil water advisory, as the City of Long Beach has.

The company serves about 370,000 customers in Atlantic Beach, Baldwin, Bay Park, Cedarhurst, East Rockaway, Hewlett, Hewlett Harbor, Hewlett Neck, Inwood, Island Park, Lakeview, Lawrence, Meadowmere, North Woodmere, Oceanside, Roosevelt, South Hempstead, Valley Stream, West Hempstead, Wantagh, Seaford, Bellmore, Massapequa, Levittown, Sea Cliff and Glen Head.

Some of those customers had been served by Aqua New York Water until May, when New York American Water acquired Aqua.