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We consider the abelian stochastic sandpile model. In this model, a site isdeemed unstable when it contains more than one particle. Each unstable site,independently, is toppled at rate $1$, sending two of its particles toneighbouring sites chosen independently. We show that when the initial averagedensity is less than $1/2$, the system locally fixates almost surely. Weachieve this bound by analysing the parity of the total number of times eachsite is visited by a large number of particles under the sandpile dynamics.

Uniform threshold for fixation of the stochastic sandpile model on the line