Air Quality

Pollution Pollution Control Air Quality Index AQI Smoke Pollution Pollutants Pollution Sources Air Pollution Wildfires Pollution Levels

Stagnant Air Prompts Ongoing Advisories in Oregon, Idaho and Arizona

Officials urge vulnerable people to limit outdoor activity due to trapped pollution.

Bay Area Issues Thursday Spare the Air Alert, Bans Wood and Solid-Fuel Burning

EPA Clarifies Clean Air Act Supports Farmers’ Right to Repair Nonroad Diesel Equipment

Southern California Air Quality Alerts in Effect as No-Burn Rule Is Enforced

New Hampshire Extends Inspection Deadlines After Federal Order Keeps Program in Place

CPSC Renews Carbon Monoxide Warning as Winter Storms Prolong Outages

Three-Layer Electrode Turns Exhaust CO2 Into Formic Acid in Single Step

Judge Blocks N.H. Repeal of Annual Vehicle Inspections Ahead of Jan. 31 Start Date

Two-Alarm Fire Engulfs South El Monte Metal Shop With Titanium and Propane Inside

San Diego County Approves $8.75 Million Plan to Tackle Tijuana River Sewage Crisis

First Images From Europe’s Meteosat Sounder Reveal 3D Atmosphere

No Acute Risk Found After Electrical Failure Triggers Flaring at Martinez Refinery

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

Study Finds Home Wood Heating a Major Winter Polluter Linked to 8,600 U.S. Deaths

House Burping Goes Viral as Experts Back Short Winter Venting for Cleaner Indoor Air

DOJ Halts Criminal Cases Over Vehicle OBD ‘Defeat Devices,’ Shifts to Civil Enforcement

EPA Halts Dollar Valuation of Air Pollution Health Benefits, Drawing Backlash

Study Links Third-Trimester Wildfire Smoke to Higher Autism Risk in Southern California Births

Health Officials Urge Winter Radon Tests During Awareness Campaign

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