Water, Supply Chains, and the Economy in Slovakia

Water consumption in Slovakia is concentrated in a small number of sectors, particularly agriculture, that contribute a relatively modest share of total economic output. Yet water is embedded in complex supply chains, meaning that restrictions on one sector propagate indirectly through food processing, manufacturing, and services. Traditional water policy, focused on direct water users, overlooks these economy-wide effects. This RETOUCH NEXUS policy brief applies an Environmentally Extended Input-Output (EEIO) framework to trace virtual water flows across Slovakia’s economy and test four policy scenarios, revealing why blanket restrictions fail and targeted efficiency measures succeed.

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Key messages

1

Economy-wide water footprint analysis reveals hidden dependencies and supply-chain vulnerabilities: Agriculture accounts for ~29% of Slovakia’s blue water consumption while generating only ~2% of added value. But the full policy risk lies in supply chains: an EEIO model with 39 subsectors and a blue water satellite account makes these virtual water flows visible and shows how a constraint on farming cascades into food processing, manufacturing, and services.

2

One-size water restrictions fail: Scenario testing shows that blanket agricultural water restrictions produce disproportionate impacts on food processing supply chains, a 5% economy-wide constraint generates a 30% reduction in food industry water consumption alongside a 1.28% drop in value added. High sectoral burden, limited overall savings.

3

Targeted efficiency improvements are the most cost-effective instrument: Improved agricultural water use efficiency delivers significant water savings without compromising output or employment. This is consistently the best-performing instrument across scenarios, delivering more for less, at lower economic disruption than either restrictions or dietary shifts alone.

4

Dietary shifts must be paired with efficiency measures to avoid unintended effects: A shift toward plant-based food reduces processing water intensity but increases water consumption during agricultural production. The net effect requires sector-by-sector analysis, dietary policy and water policy must be designed jointly, not in isolation.

5

The EEIO framework is replicable across EU member states: Any country with national input-output tables and water-use statistics can apply the same methodology. Eurostat provides harmonised data for all EU members. Priority replication targets are Czech Republic, Hungary, Poland, and Romania, enabling cross-country comparison and Danube basin-wide policy coherence via ICPDR governance structures.