Dry matter of dairy cattle slurry

9%2011 data in a 2017 reportsourcedmedium confidence

About three times as dry as the raw sludge above, so carrying slurry is no more watery than carrying sewage sludge.

Ricardo Energy & Environment for ClimateXChange, Farmyard manure, slurry and anaerobic digestion in Scotland (2017)Table 1: dairy cattle slurry, dry matter 9%