Tribes and environmental groups are challenging how the state manages water in the Sacramento-San Joaquin River Delta, a major source for much of California, arguing the deterioration of the aquatic ecosystem has links to the state’s troubled legacy of racism and oppression of Native people.

A group of activists and Indigenous leaders is demanding that the state review and update the water quality plan for the Delta and San Francisco Bay, where fish species are suffering, algae blooms have worsened and climate change is adding to the stresses.