Abstract: DM water is life line of a power plant. Presently DM make up for all NTPC running plants is around 0.84% of BMCR, however percentage figure seems misnomer if we observe the absolute values. Overall in NTPC for the year 2010-11,11-12 & 12-13 DM make up has been 55 Lacs MT, 57 Lacs MT & 63 Lacs MT respectively and this DM Make up has financial implication on cost in terms of crores of Rupees. However significance of every additional DM Make up in present cost competitive scenario is such that it needs special focus. Stringent norms of CERC recently has given a red wake up call to run our plants at maximum efficiency level and keep our performance at better heat rate possible.