Environment ❯ Air Quality ❯ Pollution ❯ Particulate Matter

PM2.5

Pakistan Tops 2025 Pollution Rankings as Loni, India, Leads City List

The report warns that patchy monitoring undermines claims of year-to-year improvement.

Hoy No Circula Uses Second‑Saturday Rules Across Mexico City Area on March 14

Mexico City Keeps Ozone Contingency in Force as 'Doble Hoy No Circula' Applies Wednesday

Johannesburg’s ‘Rotten-Egg’ Odor Persists as Monitors Log Hydrogen Sulphide Spikes

Delhi Hits 35.7°C in Hottest Early March in 50 Years as IMD Warns of Widespread Heat

Heat Wave Grips Mexico as Cold Fronts Drive Northern Winds, Argentina Extends Severe Storm Alerts

Hazardous Dust in California’s Imperial Valley, Orange PM2.5 Advisories in Tuxtla and New York City

Philadelphia Launches Breathe Philly, Citywide Real-Time Air Quality Network

Winter Smog Persists Over Eastern and Northern Germany, With PM Limits Breached in Saxony and Lower Saxony

Hoy No Circula: Monday, Feb. 2 Rules Hold Steady in Mexico City and Edomex

Delhi Air Still 'Very Poor' as GRAP-4 Is Withdrawn; Mumbai Endures Wild AQI Swings

California Air Quality Alerts Persist as 'Unhealthy' PM2.5 Prompts Stay-Home Guidance

EPA Halts Monetizing Health Benefits of PM2.5 and Ozone in Final NOx Rule

44% of Indian Cities Breach PM2.5 Limits as Byrnihat Tops 2025 Ranking

Valley of Mexico Lifts PM2.5 Contingency After New Year Pollution Eases

Delhi Begins 2026 With Very Poor Air as Dense Fog and Cold Wave Set In

Christmas Crowds Spur Traffic Curbs, Safety Operations and Weather Alerts as Lima Police Probe Two Killings

Delhi Lifts GRAP-IV After AQI Improves, ‘No PUC, No Fuel’ Rule Continues

Delhi Tightens GRAP Curbs, Fuel Ban for No‑PUC Vehicles Starts Thursday

Delhi-NCR Under GRAP Stage IV as AQI Tops 440