Metropolitan Water District’s board of directors has approved up to $285.6m of incentives to San Diego’s Pure Water recycling project, which is worth $1.4bn, over the next 25 years.

The water recycling project will feature advanced treatment processes to purify wastewater in order to supply drinking water to the city’s residents.

Metropolitan Water District of Southern California supplies water to 26 member agencies, which together serve 19 million people in six counties.