Royapuram air quality · Chennai, Tamil Nadu
Even healthy adults may notice throat irritation and mild coughing
US AQI 156 (Unhealthy) at the TNPCB monitor in Royapuram, Chennai, the 6th highest of 7 Chennai monitors reporting. India's official NAQI (CPCB) 108 (Moderate). Main pollutant: PM2.5.
Updated
Last 24 hours: worst 167 at 7 pm yesterday, best 144 at 4 pm yesterday (US AQI)
Pollutants at Royapuram
- PM2.5 · µg/m³63.04.2× WHO limit
- PM10 · µg/m³87.41.9× WHO limit
- NO₂ · µg/m³10.1Under WHO limit
- O₃ · µg/m³32.3
- SO₂ · µg/m³2.0Under WHO limit
- CO · mg/m³0.69
This hour's readings at this monitor. WHO multiples use the 2021 24-hour guidelines.
Where Royapuram ranks in Chennai
- 6thmost polluted of 7 Chennai monitors right now
- 88average US AQI, last 30 days
- 160Chennai's city figure now
Most polluted right now: Kodungaiyur 168 · Manali Village 167 · Velachery Res. Area 164 · Manali 163 · Perungudi 163.
Is it safe outside in Royapuram right now?
Some members of the general public may feel health effects; sensitive groups may feel more serious effects.
Walking and commuting
Take careKeep outdoor walks short and choose quieter streets away from traffic.
Running and jogging
AvoidMove your run indoors or reschedule for a cleaner hour.
Cycling
LimitKeep rides short and easy, or ride indoors.
Children playing outside
LimitLimit outdoor play to short, gentle sessions. Move sports indoors.
Older adults and heart or lung conditions
AvoidAvoid exertion outdoors. Follow your doctor's action plan.
Open windows
AvoidKeep windows closed while the air is unhealthy.
Mask outdoors
RecommendedWear a well-fitted N95 or FFP2 mask outdoors. Cloth and surgical masks do little against fine particles.
Air purifier indoors
RecommendedRun a HEPA purifier in the room you spend most time in.
Based on the US EPA Air Quality Guide, applied to the current US AQI category. If you have symptoms, follow your doctor's advice.
When the air is worst in Royapuram
Last 7 days, India timeOver the last 7 days, the air at this monitor was worst from 8 pm to 11 pm (average US AQI 126) and cleanest from 8 am to 11 am (90). Plan walks, runs and open windows for the cleaner hours.
Royapuram air quality, last 24 hours
Hourly US AQI, 22 of 24 hours, India timeIn the last 24 hours the US AQI at this monitor was highest at 7 pm yesterday (167, Unhealthy) and lowest at 4 pm yesterday (144, Unhealthy for Sensitive Groups).
Royapuram air quality, last 30 days
Daily average, 28 days- 88average US AQI
- 206worst day, 8 November
- 60cleanest day, 20 October
- 1days above 150 (Unhealthy or worse)
Nearby monitors
All of ChennaiRoyapuram air quality: common questions
What is the AQI in Royapuram right now?
The US AQI at the TNPCB monitor in Royapuram, Chennai is 156 (Unhealthy), the 6th highest of 7 Chennai monitors reporting. Over the last 24 hours it ranged from 144 (4 pm yesterday) to 167 (7 pm yesterday). The main pollutant is PM2.5. The same air reads India's official NAQI (CPCB) 108 (Moderate).
What time is the air worst in Royapuram?
Over the last 7 days, from 8 pm to 11 pm India time, when the monitor averaged 126. The cleanest stretch was 8 am to 11 am, at 90.
How has Royapuram's air been over the last 30 days?
The monitor averaged a US AQI of 88 over 28 days with data. The worst day was 8 November at 206 and the cleanest 20 October at 60. 1 day was above 150 (Unhealthy or worse).
Where does Royapuram's air quality data come from?
From the continuous monitoring station run by the Tamil Nadu Pollution Control Board (TNPCB) in CPCB's national network. Good Air shows the US EPA AQI worked out from those readings, and CPCB's own National Air Quality Index (NAQI) beside it. Good Air does not estimate or adjust the readings.
Source: Tamil Nadu Pollution Control Board (TNPCB), via CPCB's national monitoring network. One monitor shows the air around it, which can differ from a few streets away. Readings are published by the monitoring agency and may be revised.