Over the past decade, California has gone from being the state with the least groundwater regulation to adopting a law that serves as an international model. How the state implements its landmark groundwater law during California’s worst drought on record could inform global climate change adaptation practices for generations.

The Golden State has one shot over the course of the next 20 years to bring its depleted aquifers into balance and achieve sustainability. Californians are counting on the Sustainable Groundwater Management Act to get the state there.