  In this work we analyze quantum decoherence in neutrino oscillations
considering the Open Quantum System framework and oscillations through matter
for three neutrino families. Taking DUNE as a case study we performed
sensitivity analyses for two neutrino flux configurations finding limits for
the decoherence parameters. We also offer a physical interpretation for a new
peak which arises at the $\nu_{e}$ appearance probability with decoherence. The
best sensitivity regions found for the decoherence parameters are
$\Gamma_{21}\le 1.2\times10^{-23}\,\text{GeV}$ and $\Gamma_{32}\le
7.7\times10^{-25}\,\text{GeV}$ at $90\%$ C. L.
