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Air Quality Monitoring

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Code Orange Air Quality Alerts Continue in Parts of Pennsylvania, Extending Into Thursday in Some Areas

Stagnant air under a temperature inversion is trapping fine particle pollution near the surface.

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

Germany Records Widespread PM2.5 Breaches as Rain and Wind Bring Partial Relief

USC Satellite Study Links EV Uptake to Cleaner Neighborhood Air in California

Germany Faces Weekend of Poor Air as UBA Issues Health Warning

California PM2.5 Alerts Persist as Riverside and Orange Counties Remain Unhealthy for Sensitive Groups

Lahore Again Tops Global Pollution Rankings With Hazardous AQI 452

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

Delhi-NCR Lifts GRAP Stage IV as AQI Eases to ‘Very Poor’

Barcelona Air Pollution Hits Record Lows as City Nears EU 2030 NO2 Goal

Salt Lake City Leads U.S. Air Pollution for Second Day as Inversion Persists

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

California Air Quality Advisory Persists as PM2.5 Reaches Unhealthy Levels in Select Areas

Report Finds 18 Spanish Cities Over New EU NO2 Limit, Four Years From Deadline

Viral Mumbai Video Shows N95 Over AQI Monitor Dropping Reading to 37

South Coast AQMD Extends No-Burn Order as NWS Keeps Air-Quality Alerts Through Monday

Tanker Suspected in Rotterdam After Odor, Noise Complaints Reach The Hague

CAQM Asks Supreme Court to Narrow Relief, Exclude BS‑III and Older Vehicles

Delhi Air Quality Briefly Improves to 'Poor' as Forecasts Warn of Fresh Deterioration

Cornell Study: PM2.5 Fell 22% in Manhattan’s Congestion Zone in First Six Months