Water softeners and filtration in Oyster Bay, NY.

The Oyster Bay Water District serves about 8,500 people from five wells in the Glacial and Magothy aquifers. Its 2025 report lists total hardness of 44.0 to 73.3 mg/L, about 2.6 to 4.3 grains per gallon.

The district adds sodium hydroxide at every well to raise the pH and a small amount of chlorine for disinfection. A new advanced oxidation system for 1,4-dioxane is now running at the Shutter Lane plant, and a carbon system for PFAS is being designed for another plant.

What Oyster Bay homes are dealing with

What people notice changes from street to street here: a chlorine taste at the kitchen tap, scale where the water runs harder, or staining where there is iron. The assessment starts from what your utility publishes about the water at your address.

From there you get one recommendation for your home and one written price, before anything is ordered.

What we install in Oyster Bay

• Whole home softener and carbon filtration off your main line, the flagship bundle at $3,299 installed.
• Under sink reverse osmosis on its own faucet, for drinking and cooking water.

Local install

Every Oyster Bay job is handled locally, start to finish, by a Long Island company.