Editorial standards

Sources

• Facts come from primary or reputable sources: government agencies such as CPCB, IMD, CAQM, the US EPA and NWS, Singapore's NEA and Malaysia's DOE, peer-reviewed research, and established news organisations.
• Each claim links to its source, with the source's publication date. We do not cite a source we have not read.
• Air quality numbers come from official monitoring stations through the same data that powers the Good Air app. We never present modelled estimates as measurements.

How articles are made

• Every day we review the news, official bulletins and live readings, then write about what matters for the season and the place: smog in North India in winter, haze in Southeast Asia, wildfire smoke in the US.
• Articles are researched and drafted with the help of AI tools, from the sources linked in each article, and checked against those sources and live monitoring data before publishing.
• Graphics show only numbers that appear in the article, with their source. Diagrams that show a typical pattern rather than measurements are labelled schematic.
• Health guidance follows official advice, such as the US EPA Air Quality Guide, WHO guidelines and national health agencies. It is general information, not medical advice.

Updates and corrections

• Developing stories are updated as facts change, and the article shows the date it was last updated.
• If you spot a mistake, write to us through the support page. We correct errors promptly and note significant corrections in the article.

Independence

Good Air makes a free air quality app. The blog carries no paid placements or affiliate links, and articles mention the app only where it genuinely helps the reader.