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

Index des Wassersicherheitsrisikos

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.

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

Unsicherheit

1,000 draws

normalisation, weights, aggregation, imputation

Struktur

4 components

11 leaf indicators

Abdeckung

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
Graph
01Indikatoren
02Sub-indices
03Domain index
04Säule
05Zusammengesetzt
100%
Verzeichnis
  1. Ausmaß des Wasserstresses
    Indicator · IND · %
    Total freshwater withdrawn by all sectors as a percentage of total renewable freshwater resources after subtracting environmental flow requirements.
  2. Gesamte erneuerbare Süßwasserressourcen pro Kopf
    Indicator · IND · m3/a/person
    Long-term average internal and external renewable surface and groundwater resources per resident, in cubic metres per year.
  3. Rückgang der Grundwasserspeicher
    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. Effizienz der Wassernutzung
    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    Gross value added of agriculture, industry and services per cubic metre of water withdrawn by those sectors, at constant 2015 US dollars, weighted by each sector’s share of withdrawals; its change over time is the SDG target measure.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. Bevölkerung mit sicher verwaltetem Trinkwasser
    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. Bevölkerung mit sicher verwalteter Sanitärversorgung
    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. Bevölkerung mit grundlegenden Handwaschmöglichkeiten
    Indicator · IND · %
    Share of the population with a hand-washing facility with soap and water available at home.
  8. Gewässer mit guter Umgebungswasserqualität
    Indicator · IND · %
    Share of monitored river, lake and groundwater bodies whose measured oxygen, salinity, nitrogen, phosphorus and acidity meet national good-quality targets.
  9. Sicher behandelte Abwasserströme
    Indicator · IND · %
    Share of domestic and industrial wastewater flows that are treated to a level meeting national or local standards before discharge.
  10. Abhängigkeitsquote von externen erneuerbaren Wasserressourcen
    Indicator · IND · %
    Share of total renewable water resources that originates outside the country, as inflow from upstream countries or shared aquifers.
  11. Grenzüberschreitende Einzugsgebietsfläche mit operativer Zusammenarbeit
    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. Index des Wassersicherheitsrisikos
    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. Verwundbarkeit von Menschen und Systemen
    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
Nicht ausgeführtIn BearbeitungErledigt
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
–
läuft in Ihrem Browser
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.
03Methode

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
Unsicherheit
1,000 Monte Carlo runs over normalisation, weights, aggregation, imputation
Framework basis
SDG 6; UN-Water framing of water security; OECD/JRC Handbook (2008)
Sehr niedrig0.0 bis < 2.0
Niedrig2.0 bis < 3.5
Mittel3.5 bis < 5.0
Hoch5.0 bis < 6.5
Sehr hoch6.5 bis 10.0
04Components

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.

IndikatorEinheitEvidenzQuellenAnteil
Ausmaß des WasserstressesIND.WAT.stress.water_stress%Class Bfao-aquastat, un-sdg-database, wb-wdi44.4%
Gesamte erneuerbare Süßwasserressourcen pro KopfIND.WAT.stress.renewable_water.pcm3/a/{person}Class Bfao-aquastat, wb-wdi22.2%
Rückgang der GrundwasserspeicherIND.WAT.stress.groundwater_depletionmm/aClass Cnasa-grace-fo, igrac-ggis, national-groundwater-monitoring22.2%
Effizienz der WassernutzungIND.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.

IndikatorEinheitEvidenzQuellenAnteil
Bevölkerung mit sicher verwaltetem TrinkwasserIND.WAT.access.safely_managed_drinking_water.share%Class Bwho-unicef-jmp, wb-wdi33.3%
Bevölkerung mit sicher verwalteter SanitärversorgungIND.WAT.access.safely_managed_sanitation.share%Class Bwho-unicef-jmp, wb-wdi33.3%
Bevölkerung mit grundlegenden HandwaschmöglichkeitenIND.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.

IndikatorEinheitEvidenzQuellenAnteil
Gewässer mit guter UmgebungswasserqualitätIND.WAT.quality.good_ambient_water_quality.share%Class Bunep-gems-water, un-sdg-database50.0%
Sicher behandelte AbwasserströmeIND.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.

IndikatorEinheitEvidenzQuellenAnteil
Abhängigkeitsquote von externen erneuerbaren WasserressourcenIND.WAT.dependence.external_water_dependency%Class Bfao-aquastat66.7%
Grenzüberschreitende Einzugsgebietsfläche mit operativer ZusammenarbeitIND.WAT.dependence.transboundary_cooperation.share%Class Bunece-unesco-sdg652, un-sdg-database33.3%
05Domäne

Wasser

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

Sub-domainIndikatoren
Wasserstress5
Drinking water and sanitation4
Water quality2
Transboundary dependence2

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

06Indikatoren

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.
IndikatorDomäneSub-domainKomponenteEinheitEbenenCrosswalks
Ausmaß des WasserstressesIND.WAT.stress.water_stressWATWasserstresshazard%COUNTRY, ADM1SDG 6.4.2 WB_WDI ER.H2O.FWST.ZS
Basiswert des Wasserstresses (Teileinzugsgebiet)IND.WAT.stress.baseline_water_stressWATWasserstresshazard{score}COUNTRY, ADM1, CITY, GRID, SITE, PORTFOLIO
Gesamte erneuerbare Süßwasserressourcen pro KopfIND.WAT.stress.renewable_water.pcWATWasserstresshazardm3/a/{person}COUNTRYWB_WDI ER.H2O.INTR.PC
Rückgang der GrundwasserspeicherIND.WAT.stress.groundwater_depletionWATWasserstresshazardmm/aCOUNTRY, ADM1, GRID
Effizienz der WassernutzungIND.WAT.stress.water_use_efficiencyWATWasserstressadaptive capacity[USD]/m3COUNTRYSDG 6.4.1 WB_WDI ER.GDP.FWTL.M3.KD
Bevölkerung mit sicher verwaltetem TrinkwasserIND.WAT.access.safely_managed_drinking_water.shareWATDrinking water and sanitationvulnerability%COUNTRY, ADM1, CITYSDG 6.1.1 WB_WDI SH.H2O.SMDW.ZS EPI UWD
Bevölkerung mit mindestens grundlegender TrinkwasserversorgungIND.WAT.access.basic_drinking_water.shareWATDrinking water and sanitationvulnerability%COUNTRY, ADM1WB_WDI SH.H2O.BASW.ZS
Bevölkerung mit sicher verwalteter SanitärversorgungIND.WAT.access.safely_managed_sanitation.shareWATDrinking water and sanitationvulnerability%COUNTRY, ADM1, CITYWB_WDI SH.STA.SMSS.ZS SDG 6.2.1 EPI USD
Bevölkerung mit grundlegenden HandwaschmöglichkeitenIND.WAT.access.basic_handwashing.shareWATDrinking water and sanitationvulnerability%COUNTRY, ADM1WB_WDI SH.STA.HYGN.ZS SDG 6.2.1
Gewässer mit guter UmgebungswasserqualitätIND.WAT.quality.good_ambient_water_quality.shareWATWater qualityvulnerability%COUNTRY, ADM1SDG 6.3.2
Sicher behandelte AbwasserströmeIND.WAT.quality.wastewater_safely_treated.shareWATWater qualitycoping capacity%COUNTRY, CITYSDG 6.3.1 EPI WWT
Abhängigkeitsquote von externen erneuerbaren WasserressourcenIND.WAT.dependence.external_water_dependencyWATTransboundary dependenceexposure%COUNTRY
Grenzüberschreitende Einzugsgebietsfläche mit operativer ZusammenarbeitIND.WAT.dependence.transboundary_cooperation.shareWATTransboundary dependencecoping capacity%COUNTRYSDG 6.5.2
07Kennwert

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
–
Werte erscheinen mit der Ausgabe; Intervall, Klasse und Veränderung werden hier angezeigt.
Vorherige Ausgabe
–
Range since 2016
–
Gekoppeltes Gesamtmaß
–
Kopplungswert S
–
Pulse, letzte Woche
–
Outlook, 12 months
–
Methode
Indicator Standard 1.0 · NXS-GRX 2026
Ziehungen
1,000
Water security risk index, world, by edition

Noch keine veröffentlichten Werte. Die erste Ausgabe zeichnet hier den Verlauf mit Intervallband und Klassengrenzen.

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.
Noch keine Veränderungen. Veränderungen gegenüber der vorherigen Ausgabe werden ab der zweiten Ausgabe hier aufgeführt, mit den Indikatoren, die sie bewirkt haben.
08Werte

Country values

FIG 5 · Water security risk index: countries (values when released)
Karte wird geladen
AndorraAntigua und BarbudaBahrainBarbadosKomorenCabo VerdeDominicaMikronesien (Föderierte Staaten von)GrenadaKiribatiSt. Kitts und NevisSt. LuciaLiechtensteinMonacoMaledivenMarshallinselnMaltaMauritiusNauruPalauSingapurSan MarinoSão Tomé und PríncipeSeychellenTongaTuvaluHeiliger StuhlSt. Vincent und die GrenadinenSamoa
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.
Kacheln
/api/v1/public/grix/risk-products/tiles/wat/{z}/{x}/{y}.mvt
Beobachtungsschlüssel
nis:IDX.WAT.stress.water_security_risk:{ISO3}:{YEAR}:A
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
11Im gesamten 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.

12Zitieren

Zitieren und weiterverwenden

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.