Visakhapatnam PM10 breaches national standard on 259 of 382 days; winter inversion worsens air

All 10 monitoring stations in Visakhapatnam exceeded annual PM10 limits, with breaches on 259 of 382 days, driven by the city's bowl-shaped terrain and winter temperature inversions that trap pollutants. The data, spanning 12 months, indicates a persistent air quality crisis rather than a seasonal anomaly, though the source is a single scientist's statement. This matters as it highlights a chronic environmental health risk in a major Indian port city, potentially prompting regulatory or public-health responses.