1-σ interval on the local value of the Hubble constant H₀ obtained by different astrophysical observations in the electromagnetic and gravitational wave bands. We consider constraints derived by SNe Ia events (Riess et al. 2019), the H0liCOW experiment (Wong et al. 2019), the Planck mission (Planck Collaboration VI 2018), the Dark Energy Survey (Macaulay et al. 2019), analysis of BAO (Addison et al. 2018), and the first measurement computed by coincident detection of the neutron star merger GW170817 and its EM counterpart (Abbott et al. 2017f). The last two values correspond to specific bounds derived in this work for binary WDs observed in the decihertz band by DECIGO and B-DECIGO (see Tables 1 and 2). Dashed and solid lines correspond to errors taking the correction due to peculiar velocity into account.