It sounded too good to be true — an official forecast that 2016 water use in Arizona, California and Nevada will be the lowest since 1992.

That forecast from the U.S. Bureau of Reclamation was too good to be true — by the bureau’s own admission. It was widely reported recently as a sign of major progress toward conservation. But what the bureau calls its more accurate forecast, while still showing progress, is significantly higher, predicting water use in the states will be its lowest in 11 years — not 24.