1-σ uncertainties on density parameter ρ₀ normalized to the average density of water ρ_H2O ≃ 10³kg m⁻³ for different sources and detector configurations. Top and bottom panels: environmental effects due to gravitational pull and collisionless accretion. Different point markers identify distinct sources. For ground-based detectors and for DECIGO, we considered sources with the same parameters of GW150914, GW170608, and GW170817 (Abbott et al. 2018). For LISA, we considered a massive and intermediate-massive systems, as well as IMRI and EMRI, all located at d = 1 Gpc from the detector. The gray area denotes densities typical of accretion disks.