37.92 billion cubic metre (BCM) of stock was available across these reservoirs for the week ending April 7. These reservoirs have a total capacity of 157.799 BCM, according to a statement issued by Union Water Resources Ministry.
The stock is 31 per cent less than the corresponding period last year, it said.
The storage is also 23 per cent less than the 10-year average of it for the same duration.
Himachal Pradesh, Telangana, Punjab, West Bengal, Odisha, Rajasthan, Jharkhand, Gujarat, Maharashtra, Uttar Pradesh, Uttarakhand, Madhya Pradesh, Chhattisgarh, Tamil Nadu, Karnataka and Kerala have reported lower levels of water in major reservoirs compared to 2015.
The estimated water storage capacity of all reservoirs (small, medium and major ones) in the country is 253.88 BCM. Out of the total number of major reservoirs, 37 have hydropower benefit with installed capacity of more than 60 MW.