Composite Water Management Index

The Composite Water Management Index (CWMI) is a benchmarking and ranking instrument developed by NITI Aayog, in partnership with the Ministry of Jal Shakti (then the Ministry of Water Resources, River Development and Ganga Rejuvenation) and the Ministry of Drinking Water and Sanitation, first released on 14 June 2018. As water is a State subject under Entry 17 of the State List (Seventh Schedule) with the Union competent over inter-State rivers under Entry 56 of the Union List and Article 262, the Index functions as a cooperative-federalism device — using competitive and collaborative federalism to nudge states toward better water governance rather than legislative compulsion. It distilled the alarming finding that India faces its "worst-ever water crisis," with roughly 600 million people facing high to extreme water stress and about 200,000 deaths annually attributed to inadequate access to safe water.

Methodologically, the CWMI aggregates performance across nine broad themes comprising 28 indicators. These themes cover the augmentation of groundwater and surface water (source augmentation and restoration of water bodies), major and medium irrigation, watershed development, participatory irrigation management, sustainable on-farm water use, rural drinking water, urban water supply and sanitation, and policy and governance. States are scored out of 100 and categorised into High, Medium and Low performers, with separate treatment for North-Eastern and Himalayan states versus other states owing to differing hydrological and topographical conditions. The Index reports both the absolute level of achievement and the year-on-year improvement (incremental progress), thereby rewarding states that start low but reform fast.

In the inaugural 2018 round (FY 2015–16 data), Gujarat topped the non-Himalayan states, followed by Madhya Pradesh, Andhra Pradesh, Karnataka and Maharashtra, while Tripura led the North-Eastern and Himalayan category; states such as Jharkhand, Bihar, Uttar Pradesh and Haryana ranked among the low performers. The CWMI 2.0 report, released in August 2019 covering FY 2016–17 and 2017–18, again placed Gujarat first, with the report warning that 21 major cities including Delhi, Bengaluru, Chennai and Hyderabad risked reaching zero groundwater levels and that India could lose around 6% of GDP by 2050 due to water scarcity. The Index has since fed into flagship schemes such as the Jal Jeevan Mission (2019), the Atal Bhujal Yojana (2020) for groundwater management, and the Jal Shakti Abhiyan.

For the examination, the CWMI is high-value across GS Paper II (governance, government policies and intervention, statutory and non-statutory bodies — NITI Aayog) and GS Paper III (economic development, resource mobilisation, environment and conservation) of the UPSC Civil Services Mains, and recurs in Prelims as a factual item (which body releases it, number of themes/indicators, top-ranked state). Typical question angles ask candidates to evaluate it as an instrument of cooperative and competitive federalism, to link water stress to food security and agrarian distress, or to critique data-reliability and self-reporting limitations. Aspirants should pair it with the Mihir Shah Committee (2016) recommendations and the broader debate on a National Water Framework Law.