Central Water Commission (CWC) which functions as an attached office of Ministry of Water Resources, River Development and Ganga Rejuvenation, Government of India, monitors total water storage available in 91 major reservoirs across country.

• According to recent figures released by CWC, total water storage available is only 22 % (it was 24% in May 2019) of total storage capacity of these reservoirs.
• The drought advisory is issued to states when water level in reservoirs is about 20% less than the average of live water storage figures of past 10 year.