Redshift distribution of the DESI EDR sources with reliable redshift and photometry estimates (see Sect. 2). The catalog includes all galaxies and quasars observed within the DESI target classes: BGS, LRG, ELG, QSO, SCND, and MWS. The redshift distribution of MWS targets is scaled up by a factor of 10. Some of the sources are targeted by multiple target classes. The numbers shown in the figure also contain duplicates, so this total is higher than the number of unique targets.