Oceanside announced it will receive a $2.6 million federal grant to build two more of the wells that the city has used for more than 20 years to supply a portion of its drinking water.

The wells pump brackish water from what’s called the Mission Basin, an area near the airport, the old swap meet property and the San Luis Rey River.

The city filters the water using the same reverse osmosis process used on a much larger scale in Carlsbad to desalinate seawater.

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