Taking all precautions to help protect public health.

Suffolk County Water Authority employees are wearing face coverings during all interactions with the public and following all recommended safety measures during the pandemic.

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The best water on Earth. Naturally.

Long Island's aquifer is the sole source of all our water.

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A reasonable price.

Long Island’s aquifer, the sole source of all of our drinking water, is our most precious resource, and to help protect it, we’ve changed the way we charge for water.

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Constantly tested.

SCWA's internal standards for water quality and testing far exceed federal and state regulations. Last year, SCWA tested for the presence of 400 compounds. That's 251 more than required by law.

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Money back in your pocket.

Qualify for a $50 credit on your SCWA account just by purchasing water-saving devices.

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Proactive Treatment.

Click here for an update from SCWA on 1,4-Dioxane, PFOA & PFOS.

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A Guide to the Water Quality Treatment Charge

In order to continue bringing our customers the highest quality water available, SCWA has instituted a $20 quarterly fee on our bills as of January 1, 2020.

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The Suffolk County Impact


The Lab tests for 400 compounds, which is 251 more than required by our regulators.


SCWA's Laboratory instruments can test down to Parts Per Trillion. To get an idea, one ppt would be represented by a single drop of food coloring in 18 million gallons of water. Another way to view it as representing a single second out of 32,000 years.


SCWA has just under 6,000 miles of water main in the ground throughout our service territory. Laid out end to end, that's enough main to stretch from Suffolk to Siberia.

It is our mission to provide our customers high quality water that is constantly tested at the lowest possible cost with exemplary customer service.



Did you know?

Join us for lively, open public discussion and protect our water supply.
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Conserve water at home. Get a one-on-one consultation.
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View SCWA reports about the quality of your drinking water.
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Mapping Long Island's groundwater and drinking water quality.
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