  In this paper, we establish $\varepsilon$-regularity criteria at one scale
for suitable weak solutions to the five dimensional stationary incompressible
Navier-Stokes equations in both the unit ball $B_1$ and the unit half ball
$B_1^+$, respectively, which improve previous results in [J. Math. Fluid Mech.,
6(2004), pp 78--101] and [Comm. Pure Appl. Math., 41(1988), pp 437--458]. The
proofs of the main results are based on an iteration argument, Campanato's
method, and interpolation techniques.
