Bihar has 21 urban drinking water projects worth ₹2,451.39 crore under AMRUT 2.0, of which 18 (₹2,110 crore) are approved; nine are under construction and nine in tendering.
The largest are Patna Phase 1 (₹1,308 crore), Gaya (₹191 crore), Khagaria (₹130 crore), Samastipur (₹130 crore) and Sitamarhi (₹118 crore). The work replaces old pipelines, reduces leakage and expands treatment capacity so that lakhs of households get clean piped water.