In WIMD 2019 the domain was broken down into three sub-domains: flood risk (one indicator), air quality (three indicators) and green space (two indicators).
Ym MALlC 2019, roedd y maes wedi'i rannu'n dri is-faes: risg llifogydd (un dangosydd), ansawdd aer (tri dangosydd) a mannau gwyrdd (dau ddangosydd).