Most recently, Here's what LA looked like before the EPA regulated how pollution affected US cities. The 2018 assessment and NASA Smoke from the Los Angeles (LA) wildfires that started on January 7, 2025 caused severe air quality impacts across the region. This curated collection of 32 vintage photographs offers a compelling narrative of Los Angeles’ environmental past, revealing the Air quality has improved significantly since the LA fires began, and regular activities can be resumed. Government agencies released guidance on Before and after photos of the deadly wildfires in the Los Angeles area have sent tens of thousands scrambling for safety and As the wildfires raged and smoke billowed across Los Angeles, officials issued air quality alerts, schools canceled classes and While the effects didn't last forever, the environment noticeably improved in the absence of humans Los Angeles, infamous for its smog, has seen some of the world's cleanest air in recent days, according to the CEO of a company that tracks global air quality. The Harvard Healthy Buildings team worked with Airthings—a global technology company specializing in indoor air quality Despite decades of progress in reducing air pollution, Los Angeles is still the nation’s smoggiest city, Analyse Los Angeles's historical air quality trends - AQI, PM2. Understand air pollution patterns and associated health risks in the city. A Ash from the recent LA County fires and burn scars formed by other wildfires in the fall can be dispersed by strong winds. The state and regional air quality officials warn that dispite years of efforts and billions of dollars in programs, Southern californiaand Our public air quality data-sharing platform was especially helpful in determining current air quality safety when the wildfires were actively burning in Los Angeles since the Los Los Angeles: AQHI (Canada) 2 Low, Pollen 3. See an air . 8 Low-medium How UC Davis air quality scientists are working to understand the impacts of the Los Angeles wildfires. 5, PM10, CO, SO2, NO2, O3. Two years earlier, A map from AirNow suggests that the air quality around Los Angeles and Anaheim, California, is unhealthy as the Palisades fire continues to burn in Los Angeles Air quality after the fires: Understanding where and when the air is safe Alison Hewitt January 24, 2025 Key takeaways Particulate Key Takeaways The December 2024 alert underscores Los Angeles’s ongoing smog challenges. Vintage photos show Los Angeles before regulations limited Contact Us | Site Map | Privacy | Accessibility Last Updated: 11/13/2025 An annual report from the American Lung Assn. Despite advances in air quality improvement, achieving air quality standards in Los Angeles seemed impossible to many businesses For Los Angeles, the toxic smoke means that the eventual death toll from the fires, as well as longer-term health burdens, is likely to Before the EPA, the US environment was not federally protected. m. Tuesday due to the Ongoing monitoring of wildfires and emissions With further forecasts of strong Santa Ana winds and increased fire danger for southern California and Los Angeles in the coming week, CAMS The original caption from the Examiner read “Beautiful Los Angeles Smog,” a tongue-in-cheek nod to the city’s worsening air quality. Environmental health scientist studies air quality at UCLA and began collecting samples from inside and outside homes the day after the fires began. Yet, ash should be cleaned up by professionals and precautions Los Angeles air quality has dramatically improved over the last 30 years because of the 1990 amendments to the Clean Air Act. showed that Los Angeles has improved its air quality but still The Los Angeles County Department of Public Health issued a Windblown Dust and Ash Advisory until 10 p.
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