Sludge left to be recycled or disposed of, after treatment

35,000 tDS2025-26sourcedhigh confidence

About half of the 70,500 tDS produced. The difference is what treatment, mainly digestion, breaks down; we read it as mostly converted to biogas and water. Nearly all of what is left (99.8%) is recycled to farmland. Digestion is not total destruction.

Welsh Water, Annual Performance Report 2025-26 (tables)Table 8A, line 8A.8, 'Total sewage sludge disposed' (35.0 ttds)