The 1D spectrum extracted from the MUSE observations at the location of SN 2016adj with prominent nebular emission features from the host labeled. The underlying stellar population was estimated using STARLIGHT (red line) and subtracted from the observed spectrum. The resulting gas-phase spectrum is shown in blue. A single Gaussian function was then fit to the nebular lines plotted within the insets. Flux ratios of these lines combined with the calibrations of Marino et al. (2013) and Dopita et al. (2016) indicate gas-phase 03N2 meallicities of (12 + log₁₀(O/H)) = 8.55 ± 0.18 dex and 8.71±0.18 dex, respectively.