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Le Global Risks Index
The Global Risks Index · GRX-IDX-WAT · VUL Human and systems vulnerability

Indice de risque de sécurité hydrique

0–10 index of water security risk combining scarcity and stress, WASH access, water quality and transboundary dependence; geometric so that good access does not offset severe scarcity.

Construction Simulator Indicators
Page GRX-IDX-WATEdition Baseline Edition 2026Evidence close 2026-09-30Indicator Standard IDX.WAT.stress.water_security_riskValues not yet publishedMethod v1.0.0-draft
FIG 1 · Method card
Aggregation

geometric

equal weights · floor 0.1 where geometric

Incertitude

1,000 draws

normalisation, weights, aggregation, imputation

Structure

4 components

11 leaf indicators

Couverture

75% minimum

modelled share ≤ 20%

From the Indicator Standard definition of this index.
11
leaf indicators
4
components
1,000
Monte Carlo draws
6
series read it
01Construction

From indicators to the composite

The water dimension of a place profile; each sub-index stays visible beside the index.

computation
How Water security risk is computed
Graph18 nodes
Graphe
01Indicateurs
02Sub-indices
03Domain index
04Pilier
05Composite
100%
Liste
  1. Niveau de stress hydrique
    Indicator · IND · %
    Total freshwater withdrawn by all sectors as a percentage of total renewable freshwater resources after subtracting environmental flow requirements.
  2. Ressources totales en eau douce renouvelables par habitant
    Indicator · IND · m3/a/person
    Long-term average internal and external renewable surface and groundwater resources per resident, in cubic metres per year.
  3. Baisse du stockage des eaux souterraines
    Indicator · IND · mm/a
    Trend in terrestrial groundwater storage over at least 15 years, in millimetres of equivalent water height per year (positive = decline), from satellite gravimetry with modelled soil-moisture and surface-water storage removed.
  4. Efficacité de l'utilisation de l'eau
    Indicator · IND · USD/m3
    Gross value added of agriculture, industry and services per cubic metre of water withdrawn by those sectors, at constant 2015 US dollars, weighted by each sector’s share of withdrawals; its change over time is the SDG target measure.
  5. Population utilisant des services d'eau potable gérés en toute sécurité
    Indicator · IND · %
    Share of the population using an improved drinking-water source located on premises, available when needed and free from faecal and priority chemical contamination.
  6. Population utilisant des services d'assainissement gérés en toute sécurité
    Indicator · IND · %
    Share of the population using an improved sanitation facility not shared with other households, whose excreta are safely disposed of in situ or treated off site.
  7. Population disposant d'installations de base pour le lavage des mains
    Indicator · IND · %
    Share of the population with a hand-washing facility with soap and water available at home.
  8. Masses d'eau de bonne qualité ambiante
    Indicator · IND · %
    Share of monitored river, lake and groundwater bodies whose measured oxygen, salinity, nitrogen, phosphorus and acidity meet national good-quality targets.
  9. Eaux usées traitées en toute sécurité
    Indicator · IND · %
    Share of domestic and industrial wastewater flows that are treated to a level meeting national or local standards before discharge.
  10. Taux de dépendance aux ressources en eau renouvelables extérieures
    Indicator · IND · %
    Share of total renewable water resources that originates outside the country, as inflow from upstream countries or shared aquifers.
  11. Superficie des bassins transfrontaliers faisant l'objet d'une coopération opérationnelle
    Indicator · IND · %
    Share of the country’s transboundary river, lake and aquifer basin area covered by an arrangement for water cooperation that is operational.
  12. Water scarcity and stress sub-index
    Sub-index · SUB · w 2 · 40.0%
    Composite of the level of water stress, renewable water per capita, groundwater storage decline and water-use efficiency.
  13. Drinking water, sanitation and hygiene access sub-index
    Sub-index · SUB · w 1 · 20.0%
    Composite of safely managed drinking water, safely managed sanitation and basic hand-washing coverage.
  14. Water quality sub-index
    Sub-index · SUB · w 1 · 20.0%
    Composite of the share of water bodies with good ambient quality and the share of wastewater safely treated.
  15. Transboundary water dependence sub-index
    Sub-index · SUB · w 1 · 20.0%
    Composite of the external water dependency ratio and the share of transboundary basin area under operational cooperation.
  16. Indice de risque de sécurité hydrique
    Domain index · IDX · geometric
    0–10 index of water security risk combining scarcity and stress, WASH access, water quality and transboundary dependence; geometric so that good access does not offset severe scarcity.
  17. Vulnérabilité humaine et des systèmes
    Pillar · PILLAR · 8 indices
    How susceptible are people, livelihoods, ecosystems and essential systems to harm when a shock arrives?
  18. NXS-GRX (canonical data, provenance and risk) Composite Risk
    Composite · COMPOSITE · four pillars
    Composite = (HTE × VUL × MSF × LCC)^(1/4), each pillar on 0–10 floored at 0.1; pillar = expert-weighted geometric mean of its domain indices
Non exécutéEn coursTerminé
FIG 2. 11 indicators, 4 components, real Indicator Standard weights (the bar under each node is its share). Select a node to trace what it feeds and what feeds it; Simulate run plays the computation in order. Schematic of the construction; source: Indicator Standard composite definitions.
02Simulator

Run this index’s own aggregation

Set each component, change the aggregation or the weight uncertainty, and watch the interval, the class probability and each component’s contribution respond.

FIG 3 · Simulator: aggregate water security risk on your numbers
Components (0 to 10)
3.0
5.0
7.0
4.0
25
1
–
s’exécute dans votre navigateur
Contribution of each component (leave one out)
Simulator: the index’s published aggregation run on numbers you set, with 1,000 draws over weights and aggregation. The slider positions are starting points for the explainer, not NXS-GRX values. Simulated on your own inputs; not a measured result.
03Méthode

Treatment, normalisation, weighting, aggregation, uncertainty

Treatment
WINSORISE
Outlier rule
|skew| > 2, kurtosis > 3.5
Normalisation
min–max rescaling
Imputation
NONE
Coverage minimum
75% of components
Modelled share cap
20% of weight
Weighting
equal
Aggregation
geometric
Scale
0 to 10
Incertitude
1,000 Monte Carlo runs over normalisation, weights, aggregation, imputation
Framework basis
SDG 6; UN-Water framing of water security; OECD/JRC Handbook (2008)
Très faible0,0 à < 2,0
Faible2,0 à < 3,5
Moyen3,5 à < 5,0
Élevé5,0 à < 6,5
Très élevé6.5 à 10.0
04Composantes

4 components, 11 indicators

Water scarcity and stress sub-index w 2

Composite of the level of water stress, renewable water per capita, groundwater storage decline and water-use efficiency.

IndicateurUnitéÉléments probantsSourcesPart
Niveau de stress hydriqueIND.WAT.stress.water_stress%Class Bfao-aquastat, un-sdg-database, wb-wdi44.4%
Ressources totales en eau douce renouvelables par habitantIND.WAT.stress.renewable_water.pcm3/a/{person}Class Bfao-aquastat, wb-wdi22.2%
Baisse du stockage des eaux souterrainesIND.WAT.stress.groundwater_depletionmm/aClass Cnasa-grace-fo, igrac-ggis, national-groundwater-monitoring22.2%
Efficacité de l'utilisation de l'eauIND.WAT.stress.water_use_efficiency[USD]/m3Class Bfao-aquastat, un-sdg-database, wb-wdi11.1%

Drinking water, sanitation and hygiene access sub-index w 1

Composite of safely managed drinking water, safely managed sanitation and basic hand-washing coverage.

IndicateurUnitéÉléments probantsSourcesPart
Population utilisant des services d'eau potable gérés en toute sécuritéIND.WAT.access.safely_managed_drinking_water.share%Class Bwho-unicef-jmp, wb-wdi33.3%
Population utilisant des services d'assainissement gérés en toute sécuritéIND.WAT.access.safely_managed_sanitation.share%Class Bwho-unicef-jmp, wb-wdi33.3%
Population disposant d'installations de base pour le lavage des mainsIND.WAT.access.basic_handwashing.share%Class Bwho-unicef-jmp, wb-wdi33.3%

Water quality sub-index w 1

Composite of the share of water bodies with good ambient quality and the share of wastewater safely treated.

IndicateurUnitéÉléments probantsSourcesPart
Masses d'eau de bonne qualité ambianteIND.WAT.quality.good_ambient_water_quality.share%Class Bunep-gems-water, un-sdg-database50.0%
Eaux usées traitées en toute sécuritéIND.WAT.quality.wastewater_safely_treated.share%Class Bwho-un-habitat-wastewater, un-sdg-database50.0%

Transboundary water dependence sub-index w 1

Composite of the external water dependency ratio and the share of transboundary basin area under operational cooperation.

IndicateurUnitéÉléments probantsSourcesPart
Taux de dépendance aux ressources en eau renouvelables extérieuresIND.WAT.dependence.external_water_dependency%Class Bfao-aquastat66.7%
Superficie des bassins transfrontaliers faisant l'objet d'une coopération opérationnelleIND.WAT.dependence.transboundary_cooperation.share%Class Bunece-unesco-sdg652, un-sdg-database33.3%
05Domaine

Eau

Water availability, stress, access, quality and transboundary dependence.

Sub-domainIndicateurs
Stress hydrique5
Drinking water and sanitation4
Water quality2
Transboundary dependence2

Anchor frameworks (pillar structure and definitions only): SDG 6; FAO AQUASTAT.

06Indicateurs

All 13 water indicators

FIG 4 · Indicators in scope, by domain and sub-domain
WAT · 13
Area is the number of indicator definitions; colour is the pillar the domain feeds (Macroeconomy and Space feed through their indices). Select a block to filter the table. Source: Indicator Standard Nexus Indicator Standard register.
IndicateurDomaineSub-domainComposantUnitéNiveauxCrosswalks
Niveau de stress hydriqueIND.WAT.stress.water_stressWATStress hydriquehazard%COUNTRY, ADM1SDG 6.4.2 WB_WDI ER.H2O.FWST.ZS
Score de stress hydrique de référence (sous-bassin)IND.WAT.stress.baseline_water_stressWATStress hydriquehazard{score}COUNTRY, ADM1, CITY, GRID, SITE, PORTFOLIO
Ressources totales en eau douce renouvelables par habitantIND.WAT.stress.renewable_water.pcWATStress hydriquehazardm3/a/{person}COUNTRYWB_WDI ER.H2O.INTR.PC
Baisse du stockage des eaux souterrainesIND.WAT.stress.groundwater_depletionWATStress hydriquehazardmm/aCOUNTRY, ADM1, GRID
Efficacité de l'utilisation de l'eauIND.WAT.stress.water_use_efficiencyWATStress hydriqueadaptive capacity[USD]/m3COUNTRYSDG 6.4.1 WB_WDI ER.GDP.FWTL.M3.KD
Population utilisant des services d'eau potable gérés en toute sécuritéIND.WAT.access.safely_managed_drinking_water.shareWATDrinking water and sanitationvulnerability%COUNTRY, ADM1, CITYSDG 6.1.1 WB_WDI SH.H2O.SMDW.ZS EPI UWD
Population utilisant au moins des services d'eau potable de baseIND.WAT.access.basic_drinking_water.shareWATDrinking water and sanitationvulnerability%COUNTRY, ADM1WB_WDI SH.H2O.BASW.ZS
Population utilisant des services d'assainissement gérés en toute sécuritéIND.WAT.access.safely_managed_sanitation.shareWATDrinking water and sanitationvulnerability%COUNTRY, ADM1, CITYWB_WDI SH.STA.SMSS.ZS SDG 6.2.1 EPI USD
Population disposant d'installations de base pour le lavage des mainsIND.WAT.access.basic_handwashing.shareWATDrinking water and sanitationvulnerability%COUNTRY, ADM1WB_WDI SH.STA.HYGN.ZS SDG 6.2.1
Masses d'eau de bonne qualité ambianteIND.WAT.quality.good_ambient_water_quality.shareWATWater qualityvulnerability%COUNTRY, ADM1SDG 6.3.2
Eaux usées traitées en toute sécuritéIND.WAT.quality.wastewater_safely_treated.shareWATWater qualitycoping capacity%COUNTRY, CITYSDG 6.3.1 EPI WWT
Taux de dépendance aux ressources en eau renouvelables extérieuresIND.WAT.dependence.external_water_dependencyWATTransboundary dependenceexposure%COUNTRY
Superficie des bassins transfrontaliers faisant l'objet d'une coopération opérationnelleIND.WAT.dependence.transboundary_cooperation.shareWATTransboundary dependencecoping capacity%COUNTRYSDG 6.5.2
07Cotation

Water security risk index, world

The world reading of this index, every country as a tile and the largest movements since the previous edition.

NXS-GRX · WAT · 195 profiles · 0–10 scale
Water security risk index, world
–
Les valeurs sont publiées avec l'édition ; l'intervalle, la classe et la variation apparaissent ici.
Édition précédente
–
Range since 2016
–
Composite couplé
–
Score de couplage S
–
Pulse, dernière semaine
–
Outlook, 12 months
–
Méthode
Indicator Standard 1.0 · NXS-GRX 2026
Tirages
1,000
Water security risk index, world, by edition

Aucune valeur publiée pour l'instant. La première édition trace ici l'historique avec sa bande d'intervalle et les bornes de classe.

The line is the point value by edition; the band is the 90% interval; dashed lines are the class bounds at 2, 3.5, 5 and 6.5.
Afrique54
DZA AGO BEN BWA BFA BDI CPV CMR CAF TCD COM COG CIV COD DJI EGY GNQ ERI SWZ ETH GAB GMB GHA GIN GNB KEN LSO LBR LBY MDG MWI MLI MRT MUS MAR MOZ NAM NER NGA RWA STP SEN SYC SLE SOM ZAF SSD SDN TGO TUN UGA TZA ZMB ZWE
Amériques35
ATG ARG BHS BRB BLZ BOL BRA CAN CHL COL CRI CUB DMA DOM ECU SLV GRD GTM GUY HTI HND JAM MEX NIC PAN PRY PER KNA LCA VCT SUR TTO USA URY VEN
Asie48
AFG ARM AZE BHR BGD BTN BRN KHM CHN CYP PRK GEO IND IDN IRN IRQ ISR JPN JOR KAZ KWT KGZ LAO LBN MYS MDV MNG MMR NPL OMN PAK PHL QAT KOR SAU SGP LKA PSE SYR TJK THA TLS TUR TKM ARE UZB VNM YEM
Europe44
ALB AND AUT BLR BEL BIH BGR HRV CZE DNK EST FIN FRA DEU GRC VAT HUN ISL IRL ITA LVA LIE LTU LUX MLT MCO MNE NLD MKD NOR POL PRT MDA ROU RUS SMR SRB SVK SVN ESP SWE CHE UKR GBR
Océanie14
AUS FJI KIR MHL FSM NRU NZL PLW PNG WSM SLB TON TUV VUT
Aucune évolution pour l'instant. Les changements depuis l'édition précédente seront listés ici à partir de la deuxième édition, avec les indicateurs qui les ont déterminés.
08Valeurs

Country values

FIG 5 · Water security risk index: countries (values when released)
Chargement de la carte
AndorreAntigua-et-BarbudaBahreïnBarbadeComoresCabo VerdeDominiqueMicronésie (États fédérés de)GrenadeKiribatiSaint-Kitts-et-NevisSainte-LucieLiechtensteinMonacoMaldivesÎles MarshallMalteMauriceNauruPalaosSingapourSaint-MarinSao Tomé-et-PrincipeSeychellesTongaTuvaluSaint-SiègeSaint-Vincent-et-les GrenadinesSamoa
Equal Earth · Natural Earth 1:110mValues when released
Until the first edition is released the map shows UN M49 regions or the Nexus Reports edition; it then shows this index’s classes with each country’s interval on hover. Countries are listed by name, never ordered by value.
Tuiles
/api/v1/public/grix/risk-products/tiles/wat/{z}/{x}/{y}.mvt
Clé d'observation
nis:IDX.WAT.stress.water_security_risk:{ISO3}:{YEAR}:A
09Séries

Series that read this index

GLBGlobal SystemsThe state of interdependent global risk: the twenty domain indices aggregated to the world, the five core systems (water, energy, food, health, biodiversity) and their couplings, the global tail register and the gap between perceived and measured risk. GS-01Global WaterAccess, scarcity, quality, floods and droughts, groundwater depletion, transboundary dependency and the couplings of water to energy, food, health and nature. SR-07Food, water and energyThe food–water–energy nexus: shared stressors, trade-offs and joint failures. SR-09Planetary boundariesEarth-system boundaries and tipping elements as slow-onset, high-impact risk. XT-01Artificial Intelligence and Agentic SystemsAI and agentic systems as physical infrastructure (compute, energy, water, materials and supply chains) and as a hazard source: failure, misuse, concentration and oversight gaps. TH-01Nexus InterdependencyThe water, energy, food, health and biodiversity systems read together: drought to energy stress, energy disruption to health stress, biodiversity loss to food-system stress, flood to water contamination, heat to health and grid stress, cyber-physical disruption across all five.
10Validity

Crosswalks and validity checks

Crosswalks map leaf indicators to source code lists; established indices are used for validity checks, never re-weighted as inputs.

Code systemLeaf indicators mapped
SDG8
WB_WDI6
EPI3
11Dans le Nexus

Platforms, standards and ways to take part

Field and service platforms of GCRI, GRF and GRA, the Nexus Risk Standards for this domain, learning, working groups and open calls. Every link is a live page.

12Citer

Citer et réutiliser

GCRI Canada (2026). The Global Risks Index (NXS-GRX): Water security risk index (GRX-IDX-WAT), Baseline Edition 2026. Preparatory working draft. https://risksindex.com/indices/water-security-risk/ UNI NXS-GRX-AR-000131.

See this index in every country profile

Each profile shows this index with its interval and class once released.

Country profiles All indices

Statut

La méthodologie, la structure et les définitions de The Global Risks Index constituent un projet de travail préparatoire (2026), diffusé pour examen et commentaires et non pour mise en œuvre. Aucune valeur n'apparaît avant la publication d'une édition à partir d'une coupe de données probantes encadrée ; les valeurs comportent alors des intervalles, des classes, des sources et leur voie de correction. Les simulateurs appliquent les méthodes publiées à des nombres que vous choisissez et n'affichent jamais de valeur NXS-GRX.

Ce que NXS-GRX n'est pas

NXS-GRX est une information de recherche et d'analyse des risques. Ce n'est pas une notation de crédit ou ESG et il n'utilise aucune échelle de notation ; ce n'est pas un indice de référence pour des instruments financiers, ni une statistique officielle, ni une alerte d'urgence ou une classification officielle, ni un conseil. Il ne doit pas servir à évaluer des personnes physiques. Les classes de risque sont des bandes sur une échelle publiée, jamais des classements de pays ou de personnes.

Institutions et sources

The Nexus Consortium is stewarded by three independent not-for-profit institutions: The Global Centre for Risk and Innovation (GCRI), through GCRI US in Washington, DC and GCRI Canada in Ontario, with GCRI Canada as Lead Institution, Consortium Secretariat and lead contracting organisation; The Global Risks Forum (GRF); and The Global Risks Alliance (GRA). Technology, infrastructure and service providers work with the Consortium at arm’s length under written agreements, like every other external party in the public-private-planet model, and hold no role in its stewardship.

Chaque valeur porte l'attribution de ses sources, qui conservent leurs propres licences. Les noms externes ne sont cités qu'à des fins d'interopérabilité. Les textes rédigés par Nexus sont destinés à être publiés sous licence CC BY 4.0.

Avis en français

La méthodologie et les définitions du NXS-GRX sont un projet de travail préparatoire (2026). Le NXS-GRX est une information de recherche et d’analyse des risques : ni notation, ni indice de référence financier, ni statistique officielle, ni alerte, ni conseil. Les classes de risque sont des bandes sur une échelle publiée, non des classements.