  We consider quantum-decoherence effects in neutrino oscillation data. Working
in the open quantum system framework we adopt a phenomenological approach that
allows to parameterize the energy dependence of the decoherence effects. We
consider several phenomenological models. We analyze data from the reactor
experiments RENO, Daya Bay and KamLAND and from the accelerator experiments
NOvA, MINOS/MINOS+ and T2K. We obtain updated constraints on the decoherence
parameters quantifying the strength of damping effects, which can be as low as
$\Gamma_{ij} \lesssim 8 \times 10^{-27}$ GeV at 90% confidence level in some
cases. We also present sensitivities for the future facilities DUNE and JUNO.
