her nnp quite dua liaps

Should have covered those zhngd fail faces with masks 

krzz Daeun in Australia  

Why does Singapore’s PSI readings differ from the air quality index found on other websites? NEA explains: https://str.sg/7yYH Experts also said that the country’s central region registers the worst air quality due to high urbanisation.   Here's the full detailed account:       🌫️ Central Singapore: Worst Air Quality — Why?   📊 The Situation (Sep 2026)   - Haze since Sep 4; central region consistently highest PSI across all 5 zones  - Sep 15, 6am: Central hit 154 (unhealthy); others 104–128 — first time since 2019 all regions unhealthy  - 11:30pm Sep 15: Central 115; West 101; East 95; North 86; South 82  - Central covers: Thomson, Marymount, Sin Ming, Ang Mo Kio, Bishan, Serangoon Gardens, MacRitchie, Toa Payoh    🧑‍🔬 Expert Explanations   Urban heat & turbulence — NUS Adj. Assoc. Prof. Koh Tieh Yong:   - Central = most built-up & urbanised → concrete retains heat → stronger updrafts & air turbulence  - Incoming PM2.5 from Indonesia fires gets trapped & concentrated closer to ground by this turbulent air  - When haze is thick enough, entire island becomes unhealthy (as seen Sep 15)    Dry conditions + local emissions — NTU Prof. Steve Yim:   - Dry weather allows haze particles from Indonesia to mix with downtown/local emissions, amplifying central readings        ⚖️ PSI vs Other AQI — NEA's Clarification   Key Differences    Singapore 24-hr PSI Other AQI (e.g. aqicn.org, IQAir)  Calculation Based on 24-hour averages for all 6 pollutants[__LINK_ICON] Uses shorter averaging periods (1-hr) & different formulas  Pollutants PM2.5, PM10, SO₂, NO₂, O₃, CO — all measured by highly specialised, certified equipment[__LINK_ICON] May use NEA data + low-cost, less consistent sensors from private contributors[__LINK_ICON]  Result Generally lower/milder readings than AQI Often higher/poorer air quality displayed  Status Official national standard — tailored to Singapore's haze context[__LINK_ICON] Independent systems — not directly comparable[__LINK_ICON]    NEA's Statement   - "No international guidelines on computation; each country designs to local needs"  - PSI not identical to US EPA AQI despite referencing it  - Comparisons will show inconsistent results — trust NEA's 24-hr PSI as official        ⚠️ Health Guidance (PSI > 100 = Unhealthy)   - Healthy people: reduce prolonged/outdoor strenuous activity  - Those with heart/lung conditions: avoid such activity    Source: The Straits Times, Sep 15 2026 — https://str.sg/7yYH   Singapore 24-hr PSI Other AQI (e.g. aqicn.org, IQAir) Calculation Based on 24-hour averages for all 6 pollutants[__LINK_ICON] Uses shorter averaging periods (1-hr) & different formulas Pollutants PM2.5, PM10, SO₂, NO₂, O₃, CO — all measured by highly specialised, certified equipment[__LINK_ICON] May use NEA data + low-cost, less consistent sensors from private contributors[__LINK_ICON] Result Generally lower/milder readings than AQI Often higher/poorer air quality displayed Status Official national standard — tailored to Singapore's haze context[__LINK_ICON] Independent systems — not directly comparable[__LINK_I CON]