Surface Water Treatment Plant

If you've ever turned on a tap in Lodi, you've been using water treated right here at the Surface Water Treatment Plant. Since the 1980s, Lodi has nearly doubled its population, so relying solely on groundwater has become unsustainable. The City needed a way to ensure a long-term water source. Since the plant opened in 2012, it has processed up to 10 million gallons of Mokelumne River water daily, meeting 35% of the city's needs.

The Surface Water Treatment Plant uses cutting-edge membrane technology to filter out harmful bacteria and parasites, which makes the river water safe for us to drink. Lodi can use Mokelumne River water thanks to a 40-year purchase agreement ($1.2M/year) with the Woodbridge Irrigation District, who holds the oldest water rights on this river. Without this arrangement, Lodi wouldn't have access to the river water.