Nasa's 2022 Environmental Performance Index (EPI) Data Analysis

By gerald · November 26, 2025

The 2022 EPI ranks 180 countries on 40 performance indicators in the following 11 issue categories: air quality, sanitation and drinking water, heavy…

The 10 countries with the highest Environmental Performance Index (EPI) scores in 2022 have been identified and visualized. The bar chart displays these top-performing nations, showing their EPI scores with color intensity reflecting performance levels. These countries represent the global leaders in environmental sustainability and policy implementation.

The analysis identified the leading countries in both waste management (WMG.new) and recycling (REC.new) performance metrics. Two bar charts have been generated showing the top 10 countries for each metric, along with detailed data tables. While there was a minor technical issue displaying the full text results, the visualizations and data tables successfully capture the rankings.

Yes, there is a statistically significant moderate positive correlation between health-related scores (HLT.new) and ecosystem vitality (ECO.new) across countries. The Pearson correlation coefficient is 0.51 (p < 0.001), meaning countries with better health scores tend to also have higher ecosystem vitality scores.

The analysis identified the 10 countries with the largest positive improvements in their Environmental Performance Index (EPI) scores between old and new assessments. A bar chart has been generated showing these top performers, with the countries displaying the most significant gains in environmental performance.

The analysis identified countries with the largest gaps between drinking water (USD.new) and wastewater treatment (UWD.new) scores. A bar chart visualization was created showing the top 15 countries with the biggest disparities between these two water infrastructure metrics. The color coding indicates whether countries have better drinking water scores (positive) or better wastewater treatment scores (negative).

The analysis successfully identified the countries with the highest biodiversity habitat scores (BDH.new) and compared them across regions. Two visualizations were created: a horizontal bar chart showing the top 15 countries ranked by their BDH scores (color-coded by region), and a regional comparison chart showing average biodiversity scores by region. While there was a minor error in generating the complete text summary, the visual analysis and data tables were successfully produced.

The analysis identifies which countries rank best on air quality metrics (AIR.new) and shows their regional distribution. Two visualizations were created: a horizontal bar chart showing the top 15 countries by air quality score colored by region, and a box plot displaying the distribution of air quality scores across different regions. The data reveals clear patterns in which regions tend to have better air quality performance.

The analysis identified 58 countries that experienced declining environmental performance based on their EPI.change scores. The visualization shows the top 15 countries with the steepest declines, with the most negative values indicating the worst deterioration in environmental performance. While there was a minor technical error in displaying the detailed breakdown, the chart clearly illustrates which countries have seen their environmental scores drop most significantly.

The analysis successfully ranked countries and regions by their Climate Change metrics (CCH.new). Two visualizations were created: a horizontal bar chart showing the Top 15 countries leading in climate action (color-coded by region), and a regional comparison chart displaying average climate change scores across different world regions. While there was a minor technical issue displaying the detailed country list, the core analysis and visualizations were generated successfully.

The Global West region leads in environmental performance with an average EPI score of 63.3, outperforming all other regions. The analysis compared Environmental Performance Index scores across different global regions, revealing significant disparities in environmental outcomes worldwide.

The analysis identified countries that moved up or down most dramatically in the Environmental Performance Index rankings. A horizontal bar chart was created showing the top 10 improvers (in green) and top 10 decliners (in red), comparing their old rankings to their new rankings. Countries with positive rank changes improved their environmental performance standing, while those with negative changes dropped in the rankings.

The analysis successfully identified the strongest and weakest environmental performance categories for each region. A grouped bar chart was created comparing these extremes, with green bars showing the strongest category scores and red bars showing the weakest for each region. The visualization clearly displays the performance gaps within each region's environmental metrics.

The analysis identifies countries with the worst heavy metals exposure based on HMT.new scores, where lower scores indicate worse exposure. One country has the worst possible score of zero. The visualizations show the 15 countries with the poorest heavy metals exposure scores and compare average scores across regions, revealing which areas face the greatest environmental health challenges from heavy metal contamination.

The analysis identified countries with the worst particulate matter exposure based on their PMD.new scores (where lower scores indicate worse air pollution). Two visualizations were created: a bar chart showing the 15 countries with the lowest PMD scores colored by their change over time, and a scatter plot comparing current scores against changes across all countries by region.

The analysis identified countries showing the largest improvements and declines in CO2 emissions across two metrics: CDA.change (CO2 from electricity/heat production) and CHA.change (CO2 growth rate). While there was a minor error in displaying the detailed text results, the visualization and data tables were successfully generated showing the top performers and worst performers for both emission metrics.

Sustainable agriculture scores vary significantly by region. The Global West leads with an average score of 47.7, followed closely by Eastern Europe (46.9) and Former Soviet States (45.3). The Asia-Pacific region has the lowest average at 29.1. Two visualizations were generated: a box plot showing the distribution of scores across all regions, and a bar chart highlighting the top 15 countries in sustainable farming.