Live AQI (AQICN) + PSI (NEA) · ZeroHour Weather · Games up to Level 1,000
LIVE AIR MONITOR
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Checking every 5 min
🌤️ Weather & rain
East · West · South · North · Central
Checking the next 2 hours…Loading the latest NEA / MSS forecast.
Official source times will appear here.
Where is rain forecast?
Weather later today / tomorrowUS AQI Colour Scale (AQICN)
0–50
51–100
101–150
151–200
201–300
301+
Good
Moderate
Unhealthy for Sensitive Groups
Unhealthy
Very Unhealthy
Hazardous
PSI Colour Scale (NEA · 24-hour)
0–50
51–100
101–200
201–300
>300
Good
Moderate
Unhealthy
Very Unhealthy
Hazardous
AQI vs PSI AQICN reports AQI using the US AQI scale. NEA's PSI is Singapore's official 24-hour index across six pollutants. Their averaging periods and category boundaries differ, so the numbers are not directly interchangeable. NEA's 1-hour PM2.5 is a concentration in µg/m³, not an index. AQI uses pollutant-specific index calculations; do not interpret an AQICN AQI value as a NEA PSI value. US AQI guide · Official NEA guide
ZeroHour Singapore Haze Advisory
ZeroHour summary of NEA guidance · not an official NEA bulletin or forecast
Waiting for recent NEA readings…
Plan next-day outdoor activities using the NEA 24-hour PSI forecast and health advisory. For activities now, check the latest 1-hour PM2.5 guidance.
Official updates from NEA Open the official page for the latest forecast, issue time and health advice.
Guidance updates with your selected region and the latest NEA reading. Readings over 2 hours old are not used for current guidance. This box does not display a forecast. Check the official advisory for advice for children, older adults, pregnant women and people with heart or lung conditions.
ZeroHour Community
Chat with everyone here. Messages stay for 24 hours.
Enter your name once to start chatting.
Join as owner
Enter your private owner key to use ZeroHour with a verified Owner badge. Never post the key in chat.
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Latest 10 messages · scroll down for older messages
My friends · private
Only you can see your friend list. Friends use your coin wallet; public chat does not.
Only you and this friend can access this chat. Messages expire after 7 days. Chat is not end-to-end encrypted.
Hotspots
Satellite-detected regional fire hotspots are separate from Singapore AQI and PSI readings. A hotspot does not measure air quality at your location. Detection can be affected by cloud cover and satellite coverage.
Regional hotspot observations: view the official interactive map. View NEA's latest regional map and haze updates for current observations.
See how the readings changed · history stored on this device
AQI Trend
The graph builds automatically as readings are collected.
Detailed Singapore AQI, PSI and PM2.5
Dedicated live AQI ranking · Singapore only · Highest → Lowest
Singapore readings Highest readings first. AQI comes from local sensors; 24-hr PSI and 1-hr PM2.5 come from NEA.
⚠️ HIGHEST AQI AREA—Loading Singapore stations…
⚠️ HIGHEST PSI REGION—Official NEA 5-region PSI
HIGHEST 1-hr PM2.5—Waiting for NEA readings
🏆 Highest Recorded Readings
What does this label mean?
“Source matched” means the same source reported the same value, location and reading time on repeated checks. It does not prove the reading is accurate.
There is no waiting period that makes a reading confirmed. Accuracy needs separate, reliable evidence for that exact reading. The app currently does not check such evidence, so it will not automatically label accuracy as confirmed.
These are historical readings reported by AQICN or NEA, not independently verified records. Use the source link to check the original provider.
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Detailed Singapore AQI, PSI and PM2.5 RankingHighest first
About these readings
Only Singapore sensors with a numeric reading from the last 24 hours are shown. Sensor readings can differ from official NEA PSI. Directions are grouped from central Singapore; each group shows its highest sensor reading.
1,000 garden levels. Unlock apple trees at level 2 and mango trees at level 3, then banana, papaya, orange, pineapple, dragon fruit, coconut and durian. Every 10 levels starts a stronger seed tier. Your existing plants keep their timers and rewards.
🍍
ZeroHour Fruit Garden
Plant · grow · mix · collect
A fantasy fruit game. Your harvests and coins are virtual items with no cash value or real fruit delivery.
Today’s garden tasks
Plant, water and harvest to earn up to 26 bonus coins daily. Tasks reset at Singapore midnight.
My harvest album
Your lifetime harvests stay here, even after fruit is used for mixing.
Recent fruit harvests
Your growing plots
Water a growing plant to finish 5 minutes sooner. Up to 3 waters per plant, with 5 minutes between waters.
Plant a parent fruit
Standard fruits: 5 coins · 1 hour · harvest 8 coins. Durian: 30 coins · 8 hours · harvest 60 coins. Each harvest also adds 1 fruit to your collection.
Discover hybrid fruits
Harvest both parent fruits first. Mixing uses one of each from your collection and 12 coins, then plants a hybrid in an empty fruit plot.
Your fruit collection
Every harvest may be normal (80%), silver (15%, +3 coins) or golden (5%, +10 coins). The server reveals the result when you harvest.
Saved to your existing coin wallet. Keep your recovery key to restore this collection on another device.
Guess the AQI or PSI
Predict a fixed Singapore regional AQICN AQI or official NEA 24-hour PSI at the displayed source hour. NEA does not publish a 1-hour PSI index; this game predicts its 24-hour PSI one hour ahead. Guesses lock 5 minutes before that hour and cannot be edited. First round each Singapore calendar day is free; extra regional/hourly rounds cost 10 coins. One guess per region per hour. Exact: 30 coins; within 2: 15; within 5: 5; otherwise 0. No matching source-hour reading within 2 hours: round void and entry refunded.
Coin transaction history
About ZeroHour
Singapore AQI and PSI Update
Singapore AQI & PSI Update by ZeroHour
AQI source: WAQI / AQICN PSI & PM2.5 source: NEA Singapore Checks for new data every 5 minutes.
About ZeroHour
ZeroHour helps you check Singapore air quality, understand haze guidance and connect with others—all in one place.
We display AQI readings reported by AQICN, plus 24-hour PSI and 1-hour PM2.5 readings from NEA. Each reading includes its location, source and time. AQI and PSI use different scales and should not be treated as the same measurement.
Our haze advisory summarises NEA outdoor activity guidance. ZeroHour is an independent app and is not affiliated with NEA or AQICN. We do not independently verify sensor accuracy.
You can also enjoy mini games, grow your garden, collect virtual coins and join the community chat. Coins are for use within ZeroHour and have no cash value.
Our aim is simple: make air-quality information easier to understand and bring the community closer together.
App usage
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Counts are browsers/devices, not individual people. A random device ID is saved on this browser; clearing browser data or changing browsers can count as another device. No names or IP addresses are stored by this usage counter. A visit starts after 30 minutes of inactivity. Active now means seen within 5 minutes. Day boundaries use Singapore time.
Background alert devices
Tap Refresh to check.
Phones with background alerts enabled. One person may use more than one phone.
Owner coin tools
Private owner access. Players use their public Wallet ID for support.
Chat moderation
⚠️ Alert settings
AQI alert
Warn when any region reaches threshold
PSI alert
Warn when any region reaches threshold
Alerts enabled
In-app alerts
Background alerts are off on this device.
In-app alerts work while the app is open. To receive alerts when it is closed, enable background alerts above after the server is deployed. On iPhone (iOS 16.4+), add this app to your Home Screen, open it there, then allow notifications. Android supports notifications in Chrome. Device and network settings can affect delivery.
