Official Culligan dealer serving Long Island. We provide high quality, sustainable clean water solutions for the residential, commercial and industrial markets. Culligan of Long Island proudly offers water treatment solutions for Melville, Deer Park, Islip, Commack, Smithtown, Centereach, Brookhaven, Medford, Holbrook, Coram, Shirley, Manorville, and all of Long Island. We have the equipment and experience necessary to serve all of your water needs including water softening, reverse osmosis drinking water, bottle-free coolers and water filtration systems for both residential and commercial properties.