{
  "id": 7305171,
  "title": "1-hour PM2.5 in central Singapore hits 113",
  "url": "https://urgent.news/2026/09/14/1-hour-pm2-5-in-central-singapore-hits-113",
  "topic": "world",
  "section": "World",
  "published": "2026-09-14T11:42:04.000Z",
  "source": {
    "name": "Mothership",
    "slug": "mothership",
    "url": "https://mothership.sg/2026/09/haze-september-reading-113/"
  },
  "original_language": "en",
  "account": "On Monday morning, Sep. 14, air quality in central Singapore nearly reached the unhealthy range. The 24-hour Pollutant Standards Index (PSI) reading at 11am fell between 78 and 99, placing it in the moderate range according to the National Environment Agency (NEA) website. The unhealthy range begins at 101 and 200. The public was advised to limit prolonged or intense outdoor physical activity if the 24-hr PSI reading entered the unhealthy range.\n\nCentral Singapore was particularly hazy just before noon. The NEA reported a one-hour PM2.5 reading of 113 in central Singapore just before 10am. PM2.5 refers to the concentration of tiny airborne particles under a single hour. This reading serves as a real-time indicator of air quality during hazy conditions. PM2.5 particles are less than 2.5 micrometres in diameter. Readings between 56 and 150 indicate an elevated range, while readings between 151 and 250 suggest a high range.\n\nThose planning outdoor activities should refer to the one-hour PM2.5 concentration reading. Vulnerable individuals are urged to follow the NEA's guidance on outdoor activities during haze episodes.",
  "summary": "Smoky.",
  "key_points": [
    "Central Singapore's 1-hour PM2.5 reading reached 113 before noon on Sep. 14",
    "PM2.5 particles are less than 2.5 micrometres in diameter",
    "Vulnerable individuals advised to limit outdoor activities during haze"
  ],
  "editors_take": null,
  "illustration": null,
  "coverage": {
    "outlets": 1,
    "also_reported_by": []
  },
  "ai_generated": true,
  "disclaimer": "Summaries, key points and the editor’s take are written by software from other outlets’ reporting and may contain errors — always check the linked original."
}